-
- Debugging on Linux for s/390 & z/Architecture
- by
- Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
- Copyright (C) 2000-2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
- Best viewed with fixed width fonts
+
+ Debugging on Linux for s/390 & z/Architecture
+ by
+ Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
+ Copyright (C) 2000-2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ Best viewed with fixed width fonts
Overview of Document:
=====================
-This document is intended to give a good overview of how to debug
-Linux for s/390 & z/Architecture. It isn't intended as a complete reference & not a
+This document is intended to give a good overview of how to debug Linux for
+s/390 and z/Architecture. It is not intended as a complete reference and not a
tutorial on the fundamentals of C & assembly. It doesn't go into
390 IO in any detail. It is intended to complement the documents in the
reference section below & any other worthwhile references you get.
ldd
Debugging modules
The proc file system
-Starting points for debugging scripting languages etc.
SysRq
References
Special Thanks
============
The current architectures have the following registers.
-16 General propose registers, 32 bit on s/390 64 bit on z/Architecture, r0-r15 or gpr0-gpr15 used for arithmetic & addressing.
-
-16 Control registers, 32 bit on s/390 64 bit on z/Architecture, ( cr0-cr15 kernel usage only ) used for memory management,
-interrupt control,debugging control etc.
-
-16 Access registers ( ar0-ar15 ) 32 bit on s/390 & z/Architecture
-not used by normal programs but potentially could
-be used as temporary storage. Their main purpose is their 1 to 1
-association with general purpose registers and are used in
-the kernel for copying data between kernel & user address spaces.
-Access register 0 ( & access register 1 on z/Architecture ( needs 64 bit
-pointer ) ) is currently used by the pthread library as a pointer to
+16 General propose registers, 32 bit on s/390 and 64 bit on z/Architecture,
+r0-r15 (or gpr0-gpr15), used for arithmetic and addressing.
+
+16 Control registers, 32 bit on s/390 and 64 bit on z/Architecture, cr0-cr15,
+kernel usage only, used for memory management, interrupt control, debugging
+control etc.
+
+16 Access registers (ar0-ar15), 32 bit on both s/390 and z/Architecture,
+normally not used by normal programs but potentially could be used as
+temporary storage. These registers have a 1:1 association with general
+purpose registers and are designed to be used in the so-called access
+register mode to select different address spaces.
+Access register 0 (and access register 1 on z/Architecture, which needs a
+64 bit pointer) is currently used by the pthread library as a pointer to
the current running threads private area.
16 64 bit floating point registers (fp0-fp15 ) IEEE & HFP floating
6 6 Input/Output interrupt Mask
-7 7 External interrupt Mask used primarily for interprocessor signalling &
- clock interrupts.
+7 7 External interrupt Mask used primarily for interprocessor
+ signalling and clock interrupts.
-8-11 8-11 PSW Key used for complex memory protection mechanism not used under linux
+8-11 8-11 PSW Key used for complex memory protection mechanism
+ (not used under linux)
12 12 1 on s/390 0 on z/Architecture
13 13 Machine Check Mask 1=enable machine check interrupts
-14 14 Wait State set this to 1 to stop the processor except for interrupts & give
- time to other LPARS used in CPU idle in the kernel to increase overall
- usage of processor resources.
+14 14 Wait State. Set this to 1 to stop the processor except for
+ interrupts and give time to other LPARS. Used in CPU idle in
+ the kernel to increase overall usage of processor resources.
15 15 Problem state ( if set to 1 certain instructions are disabled )
all linux user programs run with this bit 1
when loading the address with LPSWE otherwise a
specification exception occurs, LPSW is fully backward
compatible.
-
-
+
+
Prefix Page(s)
---------------
+--------------
This per cpu memory area is too intimately tied to the processor not to mention.
-It exists between the real addresses 0-4096 on s/390 & 0-8192 z/Architecture & is exchanged
-with a 1 page on s/390 or 2 pages on z/Architecture in absolute storage by the set
-prefix instruction in linux'es startup.
-This page is mapped to a different prefix for each processor in an SMP configuration
-( assuming the os designer is sane of course :-) ).
-Bytes 0-512 ( 200 hex ) on s/390 & 0-512,4096-4544,4604-5119 currently on z/Architecture
-are used by the processor itself for holding such information as exception indications &
-entry points for exceptions.
-Bytes after 0xc00 hex are used by linux for per processor globals on s/390 & z/Architecture
-( there is a gap on z/Architecture too currently between 0xc00 & 1000 which linux uses ).
+It exists between the real addresses 0-4096 on s/390 and between 0-8192 on
+z/Architecture and is exchanged with one page on s/390 or two pages on
+z/Architecture in absolute storage by the set prefix instruction during Linux
+startup.
+This page is mapped to a different prefix for each processor in an SMP
+configuration (assuming the OS designer is sane of course).
+Bytes 0-512 (200 hex) on s/390 and 0-512, 4096-4544, 4604-5119 currently on
+z/Architecture are used by the processor itself for holding such information
+as exception indications and entry points for exceptions.
+Bytes after 0xc00 hex are used by linux for per processor globals on s/390 and
+z/Architecture (there is a gap on z/Architecture currently between 0xc00 and
+0x1000, too, which is used by Linux).
The closest thing to this on traditional architectures is the interrupt
vector table. This is a good thing & does simplify some of the kernel coding
however it means that we now cannot catch stray NULL pointers in the
The traditional Intel Linux is approximately mapped as follows forgive
the ascii art.
-0xFFFFFFFF 4GB Himem *****************
- * *
- * Kernel Space *
- * *
- ***************** ****************
-User Space Himem (typically 0xC0000000 3GB )* User Stack * * *
- ***************** * *
- * Shared Libs * * Next Process *
- ***************** * to *
- * * <== * Run * <==
- * User Program * * *
- * Data BSS * * *
- * Text * * *
- * Sections * * *
-0x00000000 ***************** ****************
-
-Now it is easy to see that on Intel it is quite easy to recognise a kernel address
-as being one greater than user space himem ( in this case 0xC0000000).
-& addresses of less than this are the ones in the current running program on this
-processor ( if an smp box ).
+0xFFFFFFFF 4GB Himem *****************
+ * *
+ * Kernel Space *
+ * *
+ ***************** ****************
+User Space Himem * User Stack * * *
+(typically 0xC0000000 3GB ) ***************** * *
+ * Shared Libs * * Next Process *
+ ***************** * to *
+ * * <== * Run * <==
+ * User Program * * *
+ * Data BSS * * *
+ * Text * * *
+ * Sections * * *
+0x00000000 ***************** ****************
+
+Now it is easy to see that on Intel it is quite easy to recognise a kernel
+address as being one greater than user space himem (in this case 0xC0000000),
+and addresses of less than this are the ones in the current running program on
+this processor (if an smp box).
If using the virtual machine ( VM ) as a debugger it is quite difficult to
know which user process is running as the address space you are looking at
could be from any process in the run queue.
Himem 0x7fffffff 2GB on s/390 ***************** ****************
currently 0x3ffffffffff (2^42)-1 * User Stack * * *
on z/Architecture. ***************** * *
- * Shared Libs * * *
- ***************** * *
+ * Shared Libs * * *
+ ***************** * *
* * * Kernel *
* User Program * * *
* Data BSS * * *
===========================================
A virtual address on s/390 is made up of 3 parts
-The SX ( segment index, roughly corresponding to the PGD & PMD in linux terminology )
-being bits 1-11.
-The PX ( page index, corresponding to the page table entry (pte) in linux terminology )
-being bits 12-19.
+The SX (segment index, roughly corresponding to the PGD & PMD in Linux
+terminology) being bits 1-11.
+The PX (page index, corresponding to the page table entry (pte) in Linux
+terminology) being bits 12-19.
The remaining bits BX (the byte index are the offset in the page )
i.e. bits 20 to 31.
* ( 8K ) *
16K aligned ************************
-What this means is that we don't need to dedicate any register or global variable
-to point to the current running process & can retrieve it with the following
-very simple construct for s/390 & one very similar for z/Architecture.
+What this means is that we don't need to dedicate any register or global
+variable to point to the current running process & can retrieve it with the
+following very simple construct for s/390 & one very similar for z/Architecture.
static inline struct task_struct * get_current(void)
{
limited knowledge of one assembly language.
It should be noted that there are some differences between the
-s/390 & z/Architecture stack layouts as the z/Architecture stack layout didn't have
-to maintain compatibility with older linkage formats.
+s/390 and z/Architecture stack layouts as the z/Architecture stack layout
+didn't have to maintain compatibility with older linkage formats.
Glossary:
---------
frameless-function
A frameless function in Linux for s390 & z/Architecture is one which doesn't
-need more than the register save area ( 96 bytes on s/390, 160 on z/Architecture )
+need more than the register save area (96 bytes on s/390, 160 on z/Architecture)
given to it by the caller.
A frameless function never:
1) Sets up a back chain.
Comments on the function test
-----------------------------
-1) It didn't need to set up a pointer to the constant pool gpr13 as it isn't used
-( :-( ).
+1) It didn't need to set up a pointer to the constant pool gpr13 as it is not
+used ( :-( ).
2) This is a frameless function & no stack is bought.
3) The compiler was clever enough to recognise that it could return the
value in r2 as well as use it for the passed in parameter ( :-) ).
Notes
-----
Addresses & values in the VM debugger are always hex never decimal
-Address ranges are of the format <HexValue1>-<HexValue2> or <HexValue1>.<HexValue2>
-e.g. The address range 0x2000 to 0x3000 can be described as 2000-3000 or 2000.1000
+Address ranges are of the format <HexValue1>-<HexValue2> or
+<HexValue1>.<HexValue2>
+For example, the address range 0x2000 to 0x3000 can be described as 2000-3000
+or 2000.1000
The VM Debugger is case insensitive.
-VM's strengths are usually other debuggers weaknesses you can get at any resource
-no matter how sensitive e.g. memory management resources,change address translation
-in the PSW. For kernel hacking you will reap dividends if you get good at it.
-
-The VM Debugger displays operators but not operands, probably because some
-of it was written when memory was expensive & the programmer was probably proud that
-it fitted into 2k of memory & the programmers & didn't want to shock hardcore VM'ers by
-changing the interface :-), also the debugger displays useful information on the same line &
-the author of the code probably felt that it was a good idea not to go over
-the 80 columns on the screen.
-
-As some of you are probably in a panic now this isn't as unintuitive as it may seem
-as the 390 instructions are easy to decode mentally & you can make a good guess at a lot
-of them as all the operands are nibble ( half byte aligned ) & if you have an objdump listing
-also it is quite easy to follow, if you don't have an objdump listing keep a copy of
-the s/390 Reference Summary & look at between pages 2 & 7 or alternatively the
-s/390 principles of operation.
+VM's strengths are usually other debuggers weaknesses you can get at any
+resource no matter how sensitive e.g. memory management resources, change
+address translation in the PSW. For kernel hacking you will reap dividends if
+you get good at it.
+
+The VM Debugger displays operators but not operands, and also the debugger
+displays useful information on the same line as the author of the code probably
+felt that it was a good idea not to go over the 80 columns on the screen.
+This isn't as unintuitive as it may seem as the s/390 instructions are easy to
+decode mentally and you can make a good guess at a lot of them as all the
+operands are nibble (half byte aligned).
+So if you have an objdump listing by hand, it is quite easy to follow, and if
+you don't have an objdump listing keep a copy of the s/390 Reference Summary
+or alternatively the s/390 principles of operation next to you.
e.g. even I can guess that
0001AFF8' LR 180F CC 0
is a ( load register ) lr r0,r15
-Also it is very easy to tell the length of a 390 instruction from the 2 most significant
-bits in the instruction ( not that this info is really useful except if you are trying to
-make sense of a hexdump of code ).
+Also it is very easy to tell the length of a 390 instruction from the 2 most
+significant bits in the instruction (not that this info is really useful except
+if you are trying to make sense of a hexdump of code).
Here is a table
Bits Instruction Length
------------------------------------------
10 4 Bytes
11 6 Bytes
-
-
-
The debugger also displays other useful info on the same line such as the
addresses being operated on destination addresses of branches & condition codes.
e.g.
--------------------------------
D G will display all the gprs
Adding a extra G to all the commands is necessary to access the full 64 bit
-content in VM on z/Architecture obviously this isn't required for access registers
-as these are still 32 bit.
+content in VM on z/Architecture. Obviously this isn't required for access
+registers as these are still 32 bit.
e.g. DGG instead of DG
D X will display all the control registers
D AR will display all the access registers
-----------------
To display memory mapped using the current PSW's mapping try
D <range>
-To make VM display a message each time it hits a particular address & continue try
+To make VM display a message each time it hits a particular address and
+continue try
D I<range> will disassemble/display a range of instructions.
ST addr 32 bit word will store a 32 bit aligned address
-D T<range> will display the EBCDIC in an address ( if you are that way inclined )
+D T<range> will display the EBCDIC in an address (if you are that way inclined)
D R<range> will display real addresses ( without DAT ) but with prefixing.
There are other complex options to display if you need to get at say home space
but are in primary space the easiest thing to do is to temporarily
Hints
-----
-If you want to issue a debugger command without halting your virtual machine with the
-PA1 key try prefixing the command with #CP e.g.
+If you want to issue a debugger command without halting your virtual machine
+with the PA1 key try prefixing the command with #CP e.g.
#cp tr i pswa 2000
also suffixing most debugger commands with RUN will cause them not
to stop just display the mnemonic at the current instruction on the console.
script with breakpoints on every kernel procedure, this isn't a good idea
because there are thousands of these routines & VM can only set 255 breakpoints
at a time so you nearly had to spend as long pruning the file down as you would
-entering the msg's by hand ),however, the trick might be useful for a single object file.
-On linux'es 3270 emulator x3270 there is a very useful option under the file ment
-Save Screens In File this is very good of keeping a copy of traces.
+entering the msgs by hand), however, the trick might be useful for a single
+object file. In the 3270 terminal emulator x3270 there is a very useful option
+in the file menu called "Save Screen In File" - this is very good for keeping a
+copy of traces.
From CMS help <command name> will give you online help on a particular command.
e.g.
This does a single step in VM on pressing F8.
SET PF10 ^
This sets up the ^ key.
-which can be used for ^c (ctrl-c),^z (ctrl-z) which can't be typed directly into some 3270 consoles.
+which can be used for ^c (ctrl-c),^z (ctrl-z) which can't be typed directly
+into some 3270 consoles.
SET PF11 ^-
This types the starting keystrokes for a sysrq see SysRq below.
SET PF12 RETRIEVE
--------------------------
If you get a crash which says something like
illegal operation or specification exception followed by a register dump
-You can restart linux & trace these using the tr prog <range or value> trace option.
-
+You can restart linux & trace these using the tr prog <range or value> trace
+option.
The most common ones you will normally be tracing for is
Tracing linux syscalls under VM
-------------------------------
-Syscalls are implemented on Linux for S390 by the Supervisor call instruction (SVC) there 256
-possibilities of these as the instruction is made up of a 0xA opcode & the second byte being
-the syscall number. They are traced using the simple command.
+Syscalls are implemented on Linux for S390 by the Supervisor call instruction
+(SVC). There 256 possibilities of these as the instruction is made up of a 0xA
+opcode and the second byte being the syscall number. They are traced using the
+simple command:
TR SVC <Optional value or range>
the syscalls are defined in linux/arch/s390/include/asm/unistd.h
e.g. to trace all file opens just do
---------------------
To find out how many cpus you have
Q CPUS displays all the CPU's available to your virtual machine
-To find the cpu that the current cpu VM debugger commands are being directed at do
-Q CPU to change the current cpu VM debugger commands are being directed at do
+To find the cpu that the current cpu VM debugger commands are being directed at
+do Q CPU to change the current cpu VM debugger commands are being directed at do
CPU <desired cpu no>
-On a SMP guest issue a command to all CPUs try prefixing the command with cpu all.
-To issue a command to a particular cpu try cpu <cpu number> e.g.
+On a SMP guest issue a command to all CPUs try prefixing the command with cpu
+all. To issue a command to a particular cpu try cpu <cpu number> e.g.
CPU 01 TR I R 2000.3000
If you are running on a guest with several cpus & you have a IO related problem
& cannot follow the flow of code but you know it isn't smp related.
Alternatively
=============
-Under older VM debuggers ( I love EBDIC too ) you can use this little program I wrote which
-will convert a command line of hex digits to ascii text which can be compiled under linux &
-you can copy the hex digits from your x3270 terminal to your xterm if you are debugging
-from a linuxbox.
+Under older VM debuggers (I love EBDIC too) you can use following little
+program which converts a command line of hex digits to ascii text. It can be
+compiled under linux and you can copy the hex digits from your x3270 terminal
+to your xterm if you are debugging from a linuxbox.
This is quite useful when looking at a parameter passed in as a text string
under VM ( unless you are good at decoding ASCII in your head ).
We have stopped at a breakpoint
000151B0' SVC 0A05 -> 0001909A' CC 0
-D 20.8 to check the SVC old psw in the prefix area & see was it from userspace
-( for the layout of the prefix area consult P18 of the s/390 390 Reference Summary
-if you have it available ).
+D 20.8 to check the SVC old psw in the prefix area and see was it from userspace
+(for the layout of the prefix area consult the "Fixed Storage Locations"
+chapter of the s/390 Reference Summary if you have it available).
V00000020 070C2000 800151B2
The problem state bit wasn't set & it's also too early in the boot sequence
for it to be a userspace SVC if it was we would have to temporarily switch the
-psw to user space addressing so we could get at the first parameter of the open in
-gpr2.
+psw to user space addressing so we could get at the first parameter of the open
+in gpr2.
Next do a
D G2
GPR 2 = 00014CB4
When your backchain reaches a dead end
--------------------------------------
-This can happen when an exception happens in the kernel & the kernel is entered twice
-if you reach the NULL pointer at the end of the back chain you should be
-able to sniff further back if you follow the following tricks.
+This can happen when an exception happens in the kernel and the kernel is
+entered twice. If you reach the NULL pointer at the end of the back chain you
+should be able to sniff further back if you follow the following tricks.
1) A kernel address should be easy to recognise since it is in
primary space & the problem state bit isn't set & also
The Hi bit of the address is set.
our 3rd return address is 8001085A
-as the 04B52002 looks suspiciously like rubbish it is fair to assume that the kernel entry routines
-for the sake of optimisation don't set up a backchain.
+as the 04B52002 looks suspiciously like rubbish it is fair to assume that the
+kernel entry routines for the sake of optimisation don't set up a backchain.
now look at System.map to see if the addresses make any sense.
s/390 & z/Architecture IO Overview
==================================
-I am not going to give a course in 390 IO architecture as this would take me quite a
-while & I'm no expert. Instead I'll give a 390 IO architecture summary for Dummies if you have
-the s/390 principles of operation available read this instead. If nothing else you may find a few
-useful keywords in here & be able to use them on a web search engine like altavista to find
-more useful information.
+I am not going to give a course in 390 IO architecture as this would take me
+quite a while and I'm no expert. Instead I'll give a 390 IO architecture
+summary for Dummies. If you have the s/390 principles of operation available
+read this instead. If nothing else you may find a few useful keywords in here
+and be able to use them on a web search engine to find more useful information.
Unlike other bus architectures modern 390 systems do their IO using mostly
-fibre optics & devices such as tapes & disks can be shared between several mainframes,
-also S390 can support up to 65536 devices while a high end PC based system might be choking
-with around 64. Here is some of the common IO terminology
+fibre optics and devices such as tapes and disks can be shared between several
+mainframes. Also S390 can support up to 65536 devices while a high end PC based
+system might be choking with around 64.
-Subchannel:
-This is the logical number most IO commands use to talk to an IO device there can be up to
-0x10000 (65536) of these in a configuration typically there is a few hundred. Under VM
-for simplicity they are allocated contiguously, however on the native hardware they are not
-they typically stay consistent between boots provided no new hardware is inserted or removed.
-Under Linux for 390 we use these as IRQ's & also when issuing an IO command (CLEAR SUBCHANNEL,
-HALT SUBCHANNEL,MODIFY SUBCHANNEL,RESUME SUBCHANNEL,START SUBCHANNEL,STORE SUBCHANNEL &
-TEST SUBCHANNEL ) we use this as the ID of the device we wish to talk to, the most
-important of these instructions are START SUBCHANNEL ( to start IO ), TEST SUBCHANNEL ( to check
-whether the IO completed successfully ), & HALT SUBCHANNEL ( to kill IO ), a subchannel
-can have up to 8 channel paths to a device this offers redundancy if one is not available.
+Here is some of the common IO terminology:
+Subchannel:
+This is the logical number most IO commands use to talk to an IO device. There
+can be up to 0x10000 (65536) of these in a configuration, typically there are a
+few hundred. Under VM for simplicity they are allocated contiguously, however
+on the native hardware they are not. They typically stay consistent between
+boots provided no new hardware is inserted or removed.
+Under Linux for s390 we use these as IRQ's and also when issuing an IO command
+(CLEAR SUBCHANNEL, HALT SUBCHANNEL, MODIFY SUBCHANNEL, RESUME SUBCHANNEL,
+START SUBCHANNEL, STORE SUBCHANNEL and TEST SUBCHANNEL). We use this as the ID
+of the device we wish to talk to. The most important of these instructions are
+START SUBCHANNEL (to start IO), TEST SUBCHANNEL (to check whether the IO
+completed successfully) and HALT SUBCHANNEL (to kill IO). A subchannel can have
+up to 8 channel paths to a device, this offers redundancy if one is not
+available.
Device Number:
-This number remains static & Is closely tied to the hardware, there are 65536 of these
-also they are made up of a CHPID ( Channel Path ID, the most significant 8 bits )
-& another lsb 8 bits. These remain static even if more devices are inserted or removed
-from the hardware, there is a 1 to 1 mapping between Subchannels & Device Numbers provided
-devices aren't inserted or removed.
+This number remains static and is closely tied to the hardware. There are 65536
+of these, made up of a CHPID (Channel Path ID, the most significant 8 bits) and
+another lsb 8 bits. These remain static even if more devices are inserted or
+removed from the hardware. There is a 1 to 1 mapping between subchannels and
+device numbers, provided devices aren't inserted or removed.
Channel Control Words:
-CCWS are linked lists of instructions initially pointed to by an operation request block (ORB),
-which is initially given to Start Subchannel (SSCH) command along with the subchannel number
-for the IO subsystem to process while the CPU continues executing normal code.
-These come in two flavours, Format 0 ( 24 bit for backward )
-compatibility & Format 1 ( 31 bit ). These are typically used to issue read & write
-( & many other instructions ) they consist of a length field & an absolute address field.
-For each IO typically get 1 or 2 interrupts one for channel end ( primary status ) when the
-channel is idle & the second for device end ( secondary status ) sometimes you get both
-concurrently, you check how the IO went on by issuing a TEST SUBCHANNEL at each interrupt,
-from which you receive an Interruption response block (IRB). If you get channel & device end
-status in the IRB without channel checks etc. your IO probably went okay. If you didn't you
-probably need a doctor to examine the IRB & extended status word etc.
+CCWs are linked lists of instructions initially pointed to by an operation
+request block (ORB), which is initially given to Start Subchannel (SSCH)
+command along with the subchannel number for the IO subsystem to process
+while the CPU continues executing normal code.
+CCWs come in two flavours, Format 0 (24 bit for backward compatibility) and
+Format 1 (31 bit). These are typically used to issue read and write (and many
+other) instructions. They consist of a length field and an absolute address
+field.
+Each IO typically gets 1 or 2 interrupts, one for channel end (primary status)
+when the channel is idle, and the second for device end (secondary status).
+Sometimes you get both concurrently. You check how the IO went on by issuing a
+TEST SUBCHANNEL at each interrupt, from which you receive an Interruption
+response block (IRB). If you get channel and device end status in the IRB
+without channel checks etc. your IO probably went okay. If you didn't you
+probably need to examine the IRB, extended status word etc.
If an error occurs, more sophisticated control units have a facility known as
-concurrent sense this means that if an error occurs Extended sense information will
-be presented in the Extended status word in the IRB if not you have to issue a
-subsequent SENSE CCW command after the test subchannel.
+concurrent sense. This means that if an error occurs Extended sense information
+will be presented in the Extended status word in the IRB. If not you have to
+issue a subsequent SENSE CCW command after the test subchannel.
-TPI( Test pending interrupt) can also be used for polled IO but in multitasking multiprocessor
-systems it isn't recommended except for checking special cases ( i.e. non looping checks for
-pending IO etc. ).
+TPI (Test pending interrupt) can also be used for polled IO, but in
+multitasking multiprocessor systems it isn't recommended except for
+checking special cases (i.e. non looping checks for pending IO etc.).
-Store Subchannel & Modify Subchannel can be used to examine & modify operating characteristics
-of a subchannel ( e.g. channel paths ).
+Store Subchannel and Modify Subchannel can be used to examine and modify
+operating characteristics of a subchannel (e.g. channel paths).
Other IO related Terms:
Sysplex: S390's Clustering Technology
-QDIO: S390's new high speed IO architecture to support devices such as gigabit ethernet,
-this architecture is also designed to be forward compatible with up & coming 64 bit machines.
+QDIO: S390's new high speed IO architecture to support devices such as gigabit
+ethernet, this architecture is also designed to be forward compatible with
+upcoming 64 bit machines.
General Concepts
Interface (OEMI).
This byte wide Parallel channel path/bus has parity & data on the "Bus" cable
-& control lines on the "Tag" cable. These can operate in byte multiplex mode for
-sharing between several slow devices or burst mode & monopolize the channel for the
-whole burst. Up to 256 devices can be addressed on one of these cables. These cables are
-about one inch in diameter. The maximum unextended length supported by these cables is
-125 Meters but this can be extended up to 2km with a fibre optic channel extended
-such as a 3044. The maximum burst speed supported is 4.5 megabytes per second however
-some really old processors support only transfer rates of 3.0, 2.0 & 1.0 MB/sec.
+and control lines on the "Tag" cable. These can operate in byte multiplex mode
+for sharing between several slow devices or burst mode and monopolize the
+channel for the whole burst. Up to 256 devices can be addressed on one of these
+cables. These cables are about one inch in diameter. The maximum unextended
+length supported by these cables is 125 Meters but this can be extended up to
+2km with a fibre optic channel extended such as a 3044. The maximum burst speed
+supported is 4.5 megabytes per second. However, some really old processors
+support only transfer rates of 3.0, 2.0 & 1.0 MB/sec.
One of these paths can be daisy chained to up to 8 control units.
ESCON if fibre optic it is also called FICON
-Was introduced by IBM in 1990. Has 2 fibre optic cables & uses either leds or lasers
-for communication at a signaling rate of up to 200 megabits/sec. As 10bits are transferred
-for every 8 bits info this drops to 160 megabits/sec & to 18.6 Megabytes/sec once
-control info & CRC are added. ESCON only operates in burst mode.
+Was introduced by IBM in 1990. Has 2 fibre optic cables and uses either leds or
+lasers for communication at a signaling rate of up to 200 megabits/sec. As
+10bits are transferred for every 8 bits info this drops to 160 megabits/sec
+and to 18.6 Megabytes/sec once control info and CRC are added. ESCON only
+operates in burst mode.
-ESCONs typical max cable length is 3km for the led version & 20km for the laser version
-known as XDF ( extended distance facility ). This can be further extended by using an
-ESCON director which triples the above mentioned ranges. Unlike Bus & Tag as ESCON is
-serial it uses a packet switching architecture the standard Bus & Tag control protocol
-is however present within the packets. Up to 256 devices can be attached to each control
-unit that uses one of these interfaces.
+ESCONs typical max cable length is 3km for the led version and 20km for the
+laser version known as XDF (extended distance facility). This can be further
+extended by using an ESCON director which triples the above mentioned ranges.
+Unlike Bus & Tag as ESCON is serial it uses a packet switching architecture,
+the standard Bus & Tag control protocol is however present within the packets.
+Up to 256 devices can be attached to each control unit that uses one of these
+interfaces.
Common 390 Devices include:
Network adapters typically OSA2,3172's,2116's & OSA-E gigabit ethernet adapters,
-Consoles 3270 & 3215 ( a teletype emulated under linux for a line mode console ).
+Consoles 3270 & 3215 (a teletype emulated under linux for a line mode console).
DASD's direct access storage devices ( otherwise known as hard disks ).
Tape Drives.
CTC ( Channel to Channel Adapters ),
ESCON or Parallel Cables used as a very high speed serial link
-between 2 machines. We use 2 cables under linux to do a bi-directional serial link.
+between 2 machines.
Debugging IO on s/390 & z/Architecture under VM
or TR HSCH 7C08-7C09
MSCH's ,STSCH's I think you can guess the rest
-Ingo's favourite trick is tracing all the IO's & CCWS & spooling them into the reader of another
-VM guest so he can ftp the logfile back to his own machine.I'll do a small bit of this & give you
- a look at the output.
+A good trick is tracing all the IO's and CCWS and spooling them into the reader
+of another VM guest so he can ftp the logfile back to his own machine. I'll do
+a small bit of this and give you a look at the output.
1) Spool stdout to VM reader
SP PRT TO (another vm guest ) or * for the local vm guest
info breakpoints: shows all current breakpoints
-info stack: shows stack back trace ( if this doesn't work too well, I'll show you the
-stacktrace by hand below ).
+info stack: shows stack back trace (if this doesn't work too well, I'll show
+you the stacktrace by hand below).
info locals: displays local variables.
stepi: steps a single machine code instruction.
e.g. stepi 100
-nexti: steps a single machine code instruction but will not step into subroutines.
+nexti: steps a single machine code instruction but will not step into
+subroutines.
finish: will run until exit of the current routine
outputs:
$1 = 11
-You might now be thinking that the line above didn't work, something extra had to be done.
+You might now be thinking that the line above didn't work, something extra had
+to be done.
(gdb) call fflush(stdout)
hello world$2 = 0
As an aside the debugger also calls malloc & free under the hood
core dumps
----------
What a core dump ?,
-A core dump is a file generated by the kernel ( if allowed ) which contains the registers,
-& all active pages of the program which has crashed.
-From this file gdb will allow you to look at the registers & stack trace & memory of the
-program as if it just crashed on your system, it is usually called core & created in the
-current working directory.
-This is very useful in that a customer can mail a core dump to a technical support department
-& the technical support department can reconstruct what happened.
-Provided they have an identical copy of this program with debugging symbols compiled in &
-the source base of this build is available.
-In short it is far more useful than something like a crash log could ever hope to be.
-
-In theory all that is missing to restart a core dumped program is a kernel patch which
-will do the following.
-1) Make a new kernel task structure
-2) Reload all the dumped pages back into the kernel's memory management structures.
-3) Do the required clock fixups
-4) Get all files & network connections for the process back into an identical state ( really difficult ).
-5) A few more difficult things I haven't thought of.
-
-
+A core dump is a file generated by the kernel (if allowed) which contains the
+registers and all active pages of the program which has crashed.
+From this file gdb will allow you to look at the registers, stack trace and
+memory of the program as if it just crashed on your system. It is usually
+called core and created in the current working directory.
+This is very useful in that a customer can mail a core dump to a technical
+support department and the technical support department can reconstruct what
+happened. Provided they have an identical copy of this program with debugging
+symbols compiled in and the source base of this build is available.
+In short it is far more useful than something like a crash log could ever hope
+to be.
Why have I never seen one ?.
Probably because you haven't used the command
#3 0x5167e6 in readline_internal_char () at readline.c:454
#4 0x5168ee in readline_internal_charloop () at readline.c:507
#5 0x51692c in readline_internal () at readline.c:521
-#6 0x5164fe in readline (prompt=0x7ffff810 "\177\81ÿ\81øx\177\81ÿ\81÷\81Ø\177\81ÿ\81øx\81À")
+#6 0x5164fe in readline (prompt=0x7ffff810)
at readline.c:349
#7 0x4d7a8a in command_line_input (prompt=0x564420 "(gdb) ", repeat=1,
annotation_suffix=0x4d6b44 "prompt") at top.c:2091
On my machine now outputs
1
IP forwarding is on.
-There is a lot of useful info in here best found by going in & having a look around,
-so I'll take you through some entries I consider important.
+There is a lot of useful info in here best found by going in and having a look
+around, so I'll take you through some entries I consider important.
All the processes running on the machine have their own entry defined by
/proc/<pid>
try
/etc/rc.d/init.d/network start
( this starts the network stack & hopefully calls ifconfig tr0 up ).
-ifconfig looks at the output of /proc/net/dev & presents it in a more presentable form
+ifconfig looks at the output of /proc/net/dev and presents it in a more
+presentable form.
Now ping the device from a machine in the same subnet.
if the RX packets count & TX packets counts don't increment you probably
have problems.
See the manpage chandev.8 &type cat /proc/chandev for more info.
-
-Starting points for debugging scripting languages etc.
-======================================================
-
-bash/sh
-
-bash -x <scriptname>
-e.g. bash -x /usr/bin/bashbug
-displays the following lines as it executes them.
-+ MACHINE=i586
-+ OS=linux-gnu
-+ CC=gcc
-+ CFLAGS= -DPROGRAM='bash' -DHOSTTYPE='i586' -DOSTYPE='linux-gnu' -DMACHTYPE='i586-pc-linux-gnu' -DSHELL -DHAVE_CONFIG_H -I. -I. -I./lib -O2 -pipe
-+ RELEASE=2.01
-+ PATCHLEVEL=1
-+ RELSTATUS=release
-+ MACHTYPE=i586-pc-linux-gnu
-
-perl -d <scriptname> runs the perlscript in a fully interactive debugger
-<like gdb>.
-Type 'h' in the debugger for help.
-
-for debugging java type
-jdb <filename> another fully interactive gdb style debugger.
-& type ? in the debugger for help.
-
-
-
SysRq
=====
This is now supported by linux for s/390 & z/Architecture.
endif
ifdef CONFIG_FUNCTION_TRACER
+ifndef CC_FLAGS_FTRACE
+CC_FLAGS_FTRACE := -pg
+endif
+export CC_FLAGS_FTRACE
ifdef CONFIG_HAVE_FENTRY
CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
endif
-KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
+KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
KBUILD_AFLAGS += $(CC_USING_FENTRY)
ifdef CONFIG_DYNAMIC_FTRACE
ifdef CONFIG_HAVE_C_RECORDMCOUNT
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
select ARCH_HAS_GCOV_PROFILE_ALL
+ select ARCH_HAS_SG_CHAIN
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_INLINE_READ_LOCK
select ARCH_INLINE_READ_LOCK_BH
select HAVE_BPF_JIT if 64BIT && PACK_STACK
select HAVE_CMPXCHG_DOUBLE
select HAVE_CMPXCHG_LOCAL
- select HAVE_C_RECORDMCOUNT
select HAVE_DEBUG_KMEMLEAK
select HAVE_DYNAMIC_FTRACE if 64BIT
select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT
select TTY
select VIRT_CPU_ACCOUNTING
select VIRT_TO_BUS
- select ARCH_HAS_SG_CHAIN
config SCHED_OMIT_FRAME_POINTER
def_bool y
def_bool n
select HAVE_MARCH_Z196_FEATURES
+config HAVE_MARCH_Z13_FEATURES
+ def_bool n
+ select HAVE_MARCH_ZEC12_FEATURES
+
choice
prompt "Processor type"
default MARCH_G5
2827 series). The kernel will be slightly faster but will not work on
older machines.
+config MARCH_Z13
+ bool "IBM z13"
+ select HAVE_MARCH_Z13_FEATURES if 64BIT
+ help
+ Select this to enable optimizations for IBM z13 (2964 series).
+ The kernel will be slightly faster but will not work on older
+ machines.
+
endchoice
config MARCH_G5_TUNE
config MARCH_ZEC12_TUNE
def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
+config MARCH_Z13_TUNE
+ def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
+
choice
prompt "Tune code generation"
default TUNE_DEFAULT
config TUNE_ZEC12
bool "IBM zBC12 and zEC12"
+config TUNE_Z13
+ bool "IBM z13"
+
endchoice
config 64BIT
Even if you don't know what to do here, say Y.
config NR_CPUS
- int "Maximum number of CPUs (2-256)"
- range 2 256
+ int "Maximum number of CPUs (2-512)"
+ range 2 512
depends on SMP
default "32" if !64BIT
default "64" if 64BIT
help
This allows you to specify the maximum number of CPUs which this
- kernel will support. The maximum supported value is 256 and the
+ kernel will support. The maximum supported value is 512 and the
minimum value which makes sense is 2.
This is purely to save memory - each supported CPU adds
can be controlled through /sys/devices/system/cpu/cpu#.
Say N if you want to disable CPU hotplug.
+config SCHED_SMT
+ def_bool n
+
config SCHED_MC
def_bool n
config SCHED_BOOK
+ def_bool n
+
+config SCHED_TOPOLOGY
def_bool y
- prompt "Book scheduler support"
+ prompt "Topology scheduler support"
depends on SMP
+ select SCHED_SMT
select SCHED_MC
+ select SCHED_BOOK
help
- Book scheduler support improves the CPU scheduler's decision making
- when dealing with machines that have several books.
+ Topology scheduler support improves the CPU scheduler's decision
+ making when dealing with machines that have multi-threading,
+ multiple cores or multiple books.
source kernel/Kconfig.preempt
mflags-$(CONFIG_MARCH_Z10) := -march=z10
mflags-$(CONFIG_MARCH_Z196) := -march=z196
mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
+mflags-$(CONFIG_MARCH_Z13) := -march=z13
aflags-y += $(mflags-y)
cflags-y += $(mflags-y)
cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10
cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196
cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
+cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
#KBUILD_IMAGE is necessary for make rpm
KBUILD_IMAGE :=arch/s390/boot/image
cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
endif
+ifdef CONFIG_FUNCTION_TRACER
+# make use of hotpatch feature if the compiler supports it
+cc_hotpatch := -mhotpatch=0,3
+ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
+CC_FLAGS_FTRACE := $(cc_hotpatch)
+KBUILD_AFLAGS += -DCC_USING_HOTPATCH
+KBUILD_CFLAGS += -DCC_USING_HOTPATCH
+endif
+endif
+
KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
KBUILD_AFLAGS += $(aflags-y)
#include <asm/uaccess.h>
#include <asm/page.h>
+#include <asm/sclp.h>
#include <asm/ipl.h>
#include "sizes.h"
#include "../../../../lib/decompress_unxz.c"
#endif
-extern _sclp_print_early(const char *);
-
static int puts(const char *s)
{
_sclp_print_early(s);
CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER=y
CONFIG_SLUB_DEBUG_ON=y
CONFIG_SLUB_STATS=y
-CONFIG_DEBUG_KMEMLEAK=y
CONFIG_DEBUG_STACK_USAGE=y
CONFIG_DEBUG_VM=y
CONFIG_DEBUG_VM_RB=y
CONFIG_DEBUG_PER_CPU_MAPS=y
CONFIG_DEBUG_SHIRQ=y
CONFIG_DETECT_HUNG_TASK=y
+CONFIG_PANIC_ON_OOPS=y
CONFIG_TIMER_STATS=y
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_KERNEL=y
CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
+CONFIG_PANIC_ON_OOPS=y
CONFIG_TIMER_STATS=y
CONFIG_RCU_TORTURE_TEST=m
CONFIG_RCU_CPU_STALL_TIMEOUT=60
CONFIG_UNUSED_SYMBOLS=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_KERNEL=y
+CONFIG_PANIC_ON_OOPS=y
CONFIG_TIMER_STATS=y
CONFIG_RCU_TORTURE_TEST=m
CONFIG_RCU_CPU_STALL_TIMEOUT=60
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_FS=y
CONFIG_DEBUG_KERNEL=y
+CONFIG_PANIC_ON_OOPS=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=60
# CONFIG_FTRACE is not set
static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
- const struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
+ struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
if (unlikely(need_fallback(sctx->key_len))) {
crypto_cipher_encrypt_one(sctx->fallback.cip, out, in);
static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
- const struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
+ struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
if (unlikely(need_fallback(sctx->key_len))) {
crypto_cipher_decrypt_one(sctx->fallback.cip, out, in);
CONFIG_CGROUPS=y
CONFIG_CPUSETS=y
CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_CGROUP_SCHED=y
CONFIG_BLK_CGROUP=y
CONFIG_NAMESPACES=y
CONFIG_BLK_DEV_INITRD=y
-CONFIG_RD_BZIP2=y
-CONFIG_RD_LZMA=y
-CONFIG_RD_XZ=y
-CONFIG_RD_LZO=y
-CONFIG_RD_LZ4=y
CONFIG_EXPERT=y
+CONFIG_BPF_SYSCALL=y
# CONFIG_COMPAT_BRK is not set
CONFIG_PROFILING=y
CONFIG_OPROFILE=y
obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o
s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o hypfs_dbfs.o hypfs_sprp.o
+s390_hypfs-objs += hypfs_diag0c.o
extern void hypfs_vm_exit(void);
extern int hypfs_vm_create_files(struct dentry *root);
+/* VM diagnose 0c */
+int hypfs_diag0c_init(void);
+void hypfs_diag0c_exit(void);
+
/* Set Partition-Resource Parameter */
int hypfs_sprp_init(void);
void hypfs_sprp_exit(void);
void *buf_free_ptr;
size_t size;
struct hypfs_dbfs_file *dbfs_file;
- struct kref kref;
};
struct hypfs_dbfs_file {
unsigned long);
/* Private data for hypfs_dbfs.c */
- struct hypfs_dbfs_data *data;
- struct delayed_work data_free_work;
struct mutex lock;
struct dentry *dentry;
};
data = kmalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return NULL;
- kref_init(&data->kref);
data->dbfs_file = f;
return data;
}
-static void hypfs_dbfs_data_free(struct kref *kref)
+static void hypfs_dbfs_data_free(struct hypfs_dbfs_data *data)
{
- struct hypfs_dbfs_data *data;
-
- data = container_of(kref, struct hypfs_dbfs_data, kref);
data->dbfs_file->data_free(data->buf_free_ptr);
kfree(data);
}
-static void data_free_delayed(struct work_struct *work)
-{
- struct hypfs_dbfs_data *data;
- struct hypfs_dbfs_file *df;
-
- df = container_of(work, struct hypfs_dbfs_file, data_free_work.work);
- mutex_lock(&df->lock);
- data = df->data;
- df->data = NULL;
- mutex_unlock(&df->lock);
- kref_put(&data->kref, hypfs_dbfs_data_free);
-}
-
static ssize_t dbfs_read(struct file *file, char __user *buf,
size_t size, loff_t *ppos)
{
df = file_inode(file)->i_private;
mutex_lock(&df->lock);
- if (!df->data) {
- data = hypfs_dbfs_data_alloc(df);
- if (!data) {
- mutex_unlock(&df->lock);
- return -ENOMEM;
- }
- rc = df->data_create(&data->buf, &data->buf_free_ptr,
- &data->size);
- if (rc) {
- mutex_unlock(&df->lock);
- kfree(data);
- return rc;
- }
- df->data = data;
- schedule_delayed_work(&df->data_free_work, HZ);
+ data = hypfs_dbfs_data_alloc(df);
+ if (!data) {
+ mutex_unlock(&df->lock);
+ return -ENOMEM;
+ }
+ rc = df->data_create(&data->buf, &data->buf_free_ptr, &data->size);
+ if (rc) {
+ mutex_unlock(&df->lock);
+ kfree(data);
+ return rc;
}
- data = df->data;
- kref_get(&data->kref);
mutex_unlock(&df->lock);
rc = simple_read_from_buffer(buf, size, ppos, data->buf, data->size);
- kref_put(&data->kref, hypfs_dbfs_data_free);
+ hypfs_dbfs_data_free(data);
return rc;
}
if (IS_ERR(df->dentry))
return PTR_ERR(df->dentry);
mutex_init(&df->lock);
- INIT_DELAYED_WORK(&df->data_free_work, data_free_delayed);
return 0;
}
--- /dev/null
+/*
+ * Hypervisor filesystem for Linux on s390
+ *
+ * Diag 0C implementation
+ *
+ * Copyright IBM Corp. 2014
+ */
+
+#include <linux/slab.h>
+#include <linux/cpu.h>
+#include <asm/hypfs.h>
+#include "hypfs.h"
+
+#define DBFS_D0C_HDR_VERSION 0
+
+/*
+ * Execute diagnose 0c in 31 bit mode
+ */
+static void diag0c(struct hypfs_diag0c_entry *entry)
+{
+ asm volatile (
+#ifdef CONFIG_64BIT
+ " sam31\n"
+ " diag %0,%0,0x0c\n"
+ " sam64\n"
+#else
+ " diag %0,%0,0x0c\n"
+#endif
+ : /* no output register */
+ : "a" (entry)
+ : "memory");
+}
+
+/*
+ * Get hypfs_diag0c_entry from CPU vector and store diag0c data
+ */
+static void diag0c_fn(void *data)
+{
+ diag0c(((void **) data)[smp_processor_id()]);
+}
+
+/*
+ * Allocate buffer and store diag 0c data
+ */
+static void *diag0c_store(unsigned int *count)
+{
+ struct hypfs_diag0c_data *diag0c_data;
+ unsigned int cpu_count, cpu, i;
+ void **cpu_vec;
+
+ get_online_cpus();
+ cpu_count = num_online_cpus();
+ cpu_vec = kmalloc(sizeof(*cpu_vec) * num_possible_cpus(), GFP_KERNEL);
+ if (!cpu_vec)
+ goto fail_put_online_cpus;
+ /* Note: Diag 0c needs 8 byte alignment and real storage */
+ diag0c_data = kzalloc(sizeof(struct hypfs_diag0c_hdr) +
+ cpu_count * sizeof(struct hypfs_diag0c_entry),
+ GFP_KERNEL | GFP_DMA);
+ if (!diag0c_data)
+ goto fail_kfree_cpu_vec;
+ i = 0;
+ /* Fill CPU vector for each online CPU */
+ for_each_online_cpu(cpu) {
+ diag0c_data->entry[i].cpu = cpu;
+ cpu_vec[cpu] = &diag0c_data->entry[i++];
+ }
+ /* Collect data all CPUs */
+ on_each_cpu(diag0c_fn, cpu_vec, 1);
+ *count = cpu_count;
+ kfree(cpu_vec);
+ put_online_cpus();
+ return diag0c_data;
+
+fail_kfree_cpu_vec:
+ kfree(cpu_vec);
+fail_put_online_cpus:
+ put_online_cpus();
+ return ERR_PTR(-ENOMEM);
+}
+
+/*
+ * Hypfs DBFS callback: Free diag 0c data
+ */
+static void dbfs_diag0c_free(const void *data)
+{
+ kfree(data);
+}
+
+/*
+ * Hypfs DBFS callback: Create diag 0c data
+ */
+static int dbfs_diag0c_create(void **data, void **data_free_ptr, size_t *size)
+{
+ struct hypfs_diag0c_data *diag0c_data;
+ unsigned int count;
+
+ diag0c_data = diag0c_store(&count);
+ if (IS_ERR(diag0c_data))
+ return PTR_ERR(diag0c_data);
+ memset(&diag0c_data->hdr, 0, sizeof(diag0c_data->hdr));
+ get_tod_clock_ext(diag0c_data->hdr.tod_ext);
+ diag0c_data->hdr.len = count * sizeof(struct hypfs_diag0c_entry);
+ diag0c_data->hdr.version = DBFS_D0C_HDR_VERSION;
+ diag0c_data->hdr.count = count;
+ *data = diag0c_data;
+ *data_free_ptr = diag0c_data;
+ *size = diag0c_data->hdr.len + sizeof(struct hypfs_diag0c_hdr);
+ return 0;
+}
+
+/*
+ * Hypfs DBFS file structure
+ */
+static struct hypfs_dbfs_file dbfs_file_0c = {
+ .name = "diag_0c",
+ .data_create = dbfs_diag0c_create,
+ .data_free = dbfs_diag0c_free,
+};
+
+/*
+ * Initialize diag 0c interface for z/VM
+ */
+int __init hypfs_diag0c_init(void)
+{
+ if (!MACHINE_IS_VM)
+ return 0;
+ return hypfs_dbfs_create_file(&dbfs_file_0c);
+}
+
+/*
+ * Shutdown diag 0c interface for z/VM
+ */
+void hypfs_diag0c_exit(void)
+{
+ if (!MACHINE_IS_VM)
+ return;
+ hypfs_dbfs_remove_file(&dbfs_file_0c);
+}
rc = -ENODATA;
goto fail_hypfs_vm_exit;
}
+ if (hypfs_diag0c_init()) {
+ rc = -ENODATA;
+ goto fail_hypfs_sprp_exit;
+ }
s390_kobj = kobject_create_and_add("s390", hypervisor_kobj);
if (!s390_kobj) {
rc = -ENOMEM;
- goto fail_hypfs_sprp_exit;
+ goto fail_hypfs_diag0c_exit;
}
rc = register_filesystem(&hypfs_type);
if (rc)
fail_filesystem:
kobject_put(s390_kobj);
+fail_hypfs_diag0c_exit:
+ hypfs_diag0c_exit();
fail_hypfs_sprp_exit:
hypfs_sprp_exit();
fail_hypfs_vm_exit:
{
unregister_filesystem(&hypfs_type);
kobject_put(s390_kobj);
+ hypfs_diag0c_exit();
hypfs_sprp_exit();
hypfs_vm_exit();
hypfs_diag_exit();
return cc;
}
+/* Store CPU counter multiple for the MT utilization counter set */
+static inline int stcctm5(u64 num, u64 *val)
+{
+ typedef struct { u64 _[num]; } addrtype;
+ int cc;
+
+ asm volatile (
+ " .insn rsy,0xeb0000000017,%2,5,%1\n"
+ " ipm %0\n"
+ " srl %0,28\n"
+ : "=d" (cc), "=Q" (*(addrtype *) val) : "d" (num) : "cc");
+ return cc;
+}
+
/* Query sampling information */
static inline int qsi(struct hws_qsi_info_block *info)
{
the loader. We need to make sure that it is out of the way of the program
that it will "exec", and that there is sufficient room for the brk. */
-extern unsigned long randomize_et_dyn(unsigned long base);
-#define ELF_ET_DYN_BASE (randomize_et_dyn(STACK_TOP / 3 * 2))
+extern unsigned long randomize_et_dyn(void);
+#define ELF_ET_DYN_BASE randomize_et_dyn()
/* This yields a mask that user programs can use to figure out what
instruction set this CPU supports. */
} while (0)
#endif /* CONFIG_COMPAT */
-#define STACK_RND_MASK 0x7ffUL
+extern unsigned long mmap_rnd_mask;
+
+#define STACK_RND_MASK (mmap_rnd_mask)
#define ARCH_DLINFO \
do { \
#define ARCH_SUPPORTS_FTRACE_OPS 1
+#ifdef CC_USING_HOTPATCH
+#define MCOUNT_INSN_SIZE 6
+#else
#define MCOUNT_INSN_SIZE 24
#define MCOUNT_RETURN_FIXUP 18
+#endif
#ifndef __ASSEMBLY__
static inline void ftrace_generate_nop_insn(struct ftrace_insn *insn)
{
#ifdef CONFIG_FUNCTION_TRACER
+#ifdef CC_USING_HOTPATCH
+ /* brcl 0,0 */
+ insn->opc = 0xc004;
+ insn->disp = 0;
+#else
/* jg .+24 */
insn->opc = 0xc0f4;
insn->disp = MCOUNT_INSN_SIZE / 2;
#endif
+#endif
}
static inline int is_ftrace_nop(struct ftrace_insn *insn)
{
#ifdef CONFIG_FUNCTION_TRACER
+#ifdef CC_USING_HOTPATCH
+ if (insn->disp == 0)
+ return 1;
+#else
if (insn->disp == MCOUNT_INSN_SIZE / 2)
return 1;
+#endif
#endif
return 0;
}
#include <linux/types.h>
#define JUMP_LABEL_NOP_SIZE 6
+#define JUMP_LABEL_NOP_OFFSET 2
#ifdef CONFIG_64BIT
#define ASM_PTR ".quad"
#define ASM_ALIGN ".balign 4"
#endif
+/*
+ * We use a brcl 0,2 instruction for jump labels at compile time so it
+ * can be easily distinguished from a hotpatch generated instruction.
+ */
static __always_inline bool arch_static_branch(struct static_key *key)
{
- asm_volatile_goto("0: brcl 0,0\n"
+ asm_volatile_goto("0: brcl 0,"__stringify(JUMP_LABEL_NOP_OFFSET)"\n"
".pushsection __jump_table, \"aw\"\n"
ASM_ALIGN "\n"
ASM_PTR " 0b, %l[label], %0\n"
extern int s390_enable_skey(void);
extern void s390_reset_cmma(struct mm_struct *mm);
+/* s390 has a private copy of get unmapped area to deal with cache synonyms */
+#define HAVE_ARCH_UNMAPPED_AREA
+#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
+
/*
* No page table caches to initialise
*/
/*
* Give up the time slice of the virtual PU.
*/
-static inline void cpu_relax(void)
-{
- barrier();
-}
+void cpu_relax(void);
#define cpu_relax_lowlatency() barrier()
extern void register_reset_call(struct reset_call *reset);
extern void unregister_reset_call(struct reset_call *reset);
-extern void s390_reset_system(void (*func)(void *), void *data);
+extern void s390_reset_system(void (*fn_pre)(void),
+ void (*fn_post)(void *), void *data);
#endif /* _ASM_S390_RESET_H */
};
struct sclp_cpu_entry {
- u8 address;
+ u8 core_id;
u8 reserved0[2];
u8 : 3;
u8 siif : 1;
unsigned long long sclp_get_rnmax(void);
unsigned long long sclp_get_rzm(void);
unsigned int sclp_get_max_cpu(void);
+unsigned int sclp_get_mtid(u8 cpu_type);
+unsigned int sclp_get_mtid_max(void);
+unsigned int sclp_get_mtid_prev(void);
int sclp_sdias_blk_count(void);
int sclp_sdias_copy(void *dest, int blk_num, int nr_blks);
int sclp_chp_configure(struct chp_id chpid);
int sclp_has_siif(void);
unsigned int sclp_get_ibc(void);
+long _sclp_print_early(const char *);
+
#endif /* _ASM_S390_SCLP_H */
#define MACHINE_FLAG_TE (1UL << 15)
#define MACHINE_FLAG_TLB_LC (1UL << 17)
#define MACHINE_FLAG_VX (1UL << 18)
+#define MACHINE_FLAG_CAD (1UL << 19)
#define MACHINE_IS_VM (S390_lowcore.machine_flags & MACHINE_FLAG_VM)
#define MACHINE_IS_KVM (S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
#define MACHINE_HAS_TE (0)
#define MACHINE_HAS_TLB_LC (0)
#define MACHINE_HAS_VX (0)
+#define MACHINE_HAS_CAD (0)
#else /* CONFIG_64BIT */
#define MACHINE_HAS_IEEE (1)
#define MACHINE_HAS_CSP (1)
#define MACHINE_HAS_TE (S390_lowcore.machine_flags & MACHINE_FLAG_TE)
#define MACHINE_HAS_TLB_LC (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
#define MACHINE_HAS_VX (S390_lowcore.machine_flags & MACHINE_FLAG_VX)
+#define MACHINE_HAS_CAD (S390_lowcore.machine_flags & MACHINE_FLAG_CAD)
#endif /* CONFIG_64BIT */
/*
#define SIGP_SET_ARCHITECTURE 18
#define SIGP_COND_EMERGENCY_SIGNAL 19
#define SIGP_SENSE_RUNNING 21
+#define SIGP_SET_MULTI_THREADING 22
#define SIGP_STORE_ADDITIONAL_STATUS 23
/* SIGP condition codes */
#define raw_smp_processor_id() (S390_lowcore.cpu_nr)
extern struct mutex smp_cpu_state_mutex;
+extern unsigned int smp_cpu_mt_shift;
+extern unsigned int smp_cpu_mtid;
extern int __cpu_up(unsigned int cpu, struct task_struct *tidle);
#else /* CONFIG_SMP */
+#define smp_cpu_mtid 0
+
static inline void smp_call_ipl_cpu(void (*func)(void *), void *data)
{
func(data);
unsigned short cpus_reserved;
char name[8];
unsigned int caf;
- char reserved_2[16];
+ char reserved_2[8];
+ unsigned char mt_installed;
+ unsigned char mt_general;
+ unsigned char mt_psmtid;
+ char reserved_3[5];
unsigned short cpus_dedicated;
unsigned short cpus_shared;
};
extern int topology_max_mnest;
-#define TOPOLOGY_CPU_BITS 64
+#define TOPOLOGY_CORE_BITS 64
#define TOPOLOGY_NR_MAG 6
-struct topology_cpu {
- unsigned char reserved0[4];
+struct topology_core {
+ unsigned char nl;
+ unsigned char reserved0[3];
unsigned char :6;
unsigned char pp:2;
unsigned char reserved1;
unsigned short origin;
- unsigned long mask[TOPOLOGY_CPU_BITS / BITS_PER_LONG];
+ unsigned long mask[TOPOLOGY_CORE_BITS / BITS_PER_LONG];
};
struct topology_container {
- unsigned char reserved[7];
+ unsigned char nl;
+ unsigned char reserved[6];
unsigned char id;
};
union topology_entry {
unsigned char nl;
- struct topology_cpu cpu;
+ struct topology_core cpu;
struct topology_container container;
};
#ifdef CONFIG_SCHED_BOOK
struct cpu_topology_s390 {
+ unsigned short thread_id;
unsigned short core_id;
unsigned short socket_id;
unsigned short book_id;
+ cpumask_t thread_mask;
cpumask_t core_mask;
cpumask_t book_mask;
};
extern struct cpu_topology_s390 cpu_topology[NR_CPUS];
#define topology_physical_package_id(cpu) (cpu_topology[cpu].socket_id)
+#define topology_thread_id(cpu) (cpu_topology[cpu].thread_id)
+#define topology_thread_cpumask(cpu) (&cpu_topology[cpu].thread_mask)
#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_mask)
#define topology_book_id(cpu) (cpu_topology[cpu].book_id)
/*
- * IOCTL interface for hypfs
+ * Structures for hypfs interface
*
* Copyright IBM Corp. 2013
*
* Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
-#ifndef _ASM_HYPFS_CTL_H
-#define _ASM_HYPFS_CTL_H
+#ifndef _ASM_HYPFS_H
+#define _ASM_HYPFS_H
#include <linux/types.h>
+/*
+ * IOCTL for binary interface /sys/kernel/debug/diag_304
+ */
struct hypfs_diag304 {
__u32 args[2];
__u64 data;
#define HYPFS_DIAG304 \
_IOWR(HYPFS_IOCTL_MAGIC, 0x20, struct hypfs_diag304)
+/*
+ * Structures for binary interface /sys/kernel/debug/diag_0c
+ */
+struct hypfs_diag0c_hdr {
+ __u64 len; /* Length of diag0c buffer without header */
+ __u16 version; /* Version of header */
+ char reserved1[6]; /* Reserved */
+ char tod_ext[16]; /* TOD clock for diag0c */
+ __u64 count; /* Number of entries (CPUs) in diag0c array */
+ char reserved2[24]; /* Reserved */
+};
+
+struct hypfs_diag0c_entry {
+ char date[8]; /* MM/DD/YY in EBCDIC */
+ char time[8]; /* HH:MM:SS in EBCDIC */
+ __u64 virtcpu; /* Virtual time consumed by the virt CPU (us) */
+ __u64 totalproc; /* Total of virtual and simulation time (us) */
+ __u32 cpu; /* Linux logical CPU number */
+ __u32 reserved; /* Align to 8 byte */
+};
+
+struct hypfs_diag0c_data {
+ struct hypfs_diag0c_hdr hdr; /* 64 byte header */
+ struct hypfs_diag0c_entry entry[]; /* diag0c entry array */
+};
+
#endif
ifdef CONFIG_FUNCTION_TRACER
# Don't trace early setup code and tracing code
-CFLAGS_REMOVE_early.o = -pg
-CFLAGS_REMOVE_ftrace.o = -pg
+CFLAGS_REMOVE_early.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE)
endif
#
lg %r4,0(%r4) # Save PSW
sturg %r4,%r3 # Use sturg, because of large pages
lghi %r1,1
- diag %r1,%r1,0x308
+ lghi %r0,0
+ diag %r0,%r1,0x308
.Lrestart_part2:
lhi %r0,0 # Load r0 with zero
lhi %r1,2 # Use mode 2 = ESAME (dump)
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
-#include <linux/notifier.h>
#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/slab.h>
#include <linux/cpu.h>
+#include <linux/cacheinfo.h>
#include <asm/facility.h>
-struct cache {
- unsigned long size;
- unsigned int line_size;
- unsigned int associativity;
- unsigned int nr_sets;
- unsigned int level : 3;
- unsigned int type : 2;
- unsigned int private : 1;
- struct list_head list;
-};
-
-struct cache_dir {
- struct kobject *kobj;
- struct cache_index_dir *index;
-};
-
-struct cache_index_dir {
- struct kobject kobj;
- int cpu;
- struct cache *cache;
- struct cache_index_dir *next;
-};
-
enum {
CACHE_SCOPE_NOTEXISTS,
CACHE_SCOPE_PRIVATE,
};
enum {
- CACHE_TYPE_SEPARATE,
- CACHE_TYPE_DATA,
- CACHE_TYPE_INSTRUCTION,
- CACHE_TYPE_UNIFIED,
+ CTYPE_SEPARATE,
+ CTYPE_DATA,
+ CTYPE_INSTRUCTION,
+ CTYPE_UNIFIED,
};
enum {
};
#define CACHE_MAX_LEVEL 8
-
union cache_topology {
struct cache_info ci[CACHE_MAX_LEVEL];
unsigned long long raw;
};
static const char * const cache_type_string[] = {
- "Data",
+ "",
"Instruction",
+ "Data",
+ "",
"Unified",
};
-static struct cache_dir *cache_dir_cpu[NR_CPUS];
-static LIST_HEAD(cache_list);
+static const enum cache_type cache_type_map[] = {
+ [CTYPE_SEPARATE] = CACHE_TYPE_SEPARATE,
+ [CTYPE_DATA] = CACHE_TYPE_DATA,
+ [CTYPE_INSTRUCTION] = CACHE_TYPE_INST,
+ [CTYPE_UNIFIED] = CACHE_TYPE_UNIFIED,
+};
void show_cacheinfo(struct seq_file *m)
{
- struct cache *cache;
- int index = 0;
+ struct cpu_cacheinfo *this_cpu_ci;
+ struct cacheinfo *cache;
+ int idx;
- list_for_each_entry(cache, &cache_list, list) {
- seq_printf(m, "cache%-11d: ", index);
+ get_online_cpus();
+ this_cpu_ci = get_cpu_cacheinfo(cpumask_any(cpu_online_mask));
+ for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) {
+ cache = this_cpu_ci->info_list + idx;
+ seq_printf(m, "cache%-11d: ", idx);
seq_printf(m, "level=%d ", cache->level);
seq_printf(m, "type=%s ", cache_type_string[cache->type]);
- seq_printf(m, "scope=%s ", cache->private ? "Private" : "Shared");
- seq_printf(m, "size=%luK ", cache->size >> 10);
- seq_printf(m, "line_size=%u ", cache->line_size);
- seq_printf(m, "associativity=%d", cache->associativity);
+ seq_printf(m, "scope=%s ",
+ cache->disable_sysfs ? "Shared" : "Private");
+ seq_printf(m, "size=%dK ", cache->size >> 10);
+ seq_printf(m, "line_size=%u ", cache->coherency_line_size);
+ seq_printf(m, "associativity=%d", cache->ways_of_associativity);
seq_puts(m, "\n");
- index++;
}
+ put_online_cpus();
+}
+
+static inline enum cache_type get_cache_type(struct cache_info *ci, int level)
+{
+ if (level >= CACHE_MAX_LEVEL)
+ return CACHE_TYPE_NOCACHE;
+
+ ci += level;
+
+ if (ci->scope != CACHE_SCOPE_SHARED && ci->scope != CACHE_SCOPE_PRIVATE)
+ return CACHE_TYPE_NOCACHE;
+
+ return cache_type_map[ci->type];
}
static inline unsigned long ecag(int ai, int li, int ti)
return val;
}
-static int __init cache_add(int level, int private, int type)
+static void ci_leaf_init(struct cacheinfo *this_leaf, int private,
+ enum cache_type type, unsigned int level)
{
- struct cache *cache;
- int ti;
+ int ti, num_sets;
+ int cpu = smp_processor_id();
- cache = kzalloc(sizeof(*cache), GFP_KERNEL);
- if (!cache)
- return -ENOMEM;
- if (type == CACHE_TYPE_INSTRUCTION)
+ if (type == CACHE_TYPE_INST)
ti = CACHE_TI_INSTRUCTION;
else
ti = CACHE_TI_UNIFIED;
- cache->size = ecag(EXTRACT_SIZE, level, ti);
- cache->line_size = ecag(EXTRACT_LINE_SIZE, level, ti);
- cache->associativity = ecag(EXTRACT_ASSOCIATIVITY, level, ti);
- cache->nr_sets = cache->size / cache->associativity;
- cache->nr_sets /= cache->line_size;
- cache->private = private;
- cache->level = level + 1;
- cache->type = type - 1;
- list_add_tail(&cache->list, &cache_list);
- return 0;
-}
-
-static void __init cache_build_info(void)
-{
- struct cache *cache, *next;
- union cache_topology ct;
- int level, private, rc;
-
- ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
- for (level = 0; level < CACHE_MAX_LEVEL; level++) {
- switch (ct.ci[level].scope) {
- case CACHE_SCOPE_SHARED:
- private = 0;
- break;
- case CACHE_SCOPE_PRIVATE:
- private = 1;
- break;
- default:
- return;
- }
- if (ct.ci[level].type == CACHE_TYPE_SEPARATE) {
- rc = cache_add(level, private, CACHE_TYPE_DATA);
- rc |= cache_add(level, private, CACHE_TYPE_INSTRUCTION);
- } else {
- rc = cache_add(level, private, ct.ci[level].type);
- }
- if (rc)
- goto error;
- }
- return;
-error:
- list_for_each_entry_safe(cache, next, &cache_list, list) {
- list_del(&cache->list);
- kfree(cache);
- }
-}
-
-static struct cache_dir *cache_create_cache_dir(int cpu)
-{
- struct cache_dir *cache_dir;
- struct kobject *kobj = NULL;
- struct device *dev;
-
- dev = get_cpu_device(cpu);
- if (!dev)
- goto out;
- kobj = kobject_create_and_add("cache", &dev->kobj);
- if (!kobj)
- goto out;
- cache_dir = kzalloc(sizeof(*cache_dir), GFP_KERNEL);
- if (!cache_dir)
- goto out;
- cache_dir->kobj = kobj;
- cache_dir_cpu[cpu] = cache_dir;
- return cache_dir;
-out:
- kobject_put(kobj);
- return NULL;
-}
-
-static struct cache_index_dir *kobj_to_cache_index_dir(struct kobject *kobj)
-{
- return container_of(kobj, struct cache_index_dir, kobj);
-}
-
-static void cache_index_release(struct kobject *kobj)
-{
- struct cache_index_dir *index;
-
- index = kobj_to_cache_index_dir(kobj);
- kfree(index);
-}
-
-static ssize_t cache_index_show(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- struct kobj_attribute *kobj_attr;
-
- kobj_attr = container_of(attr, struct kobj_attribute, attr);
- return kobj_attr->show(kobj, kobj_attr, buf);
-}
-
-#define DEFINE_CACHE_ATTR(_name, _format, _value) \
-static ssize_t cache_##_name##_show(struct kobject *kobj, \
- struct kobj_attribute *attr, \
- char *buf) \
-{ \
- struct cache_index_dir *index; \
- \
- index = kobj_to_cache_index_dir(kobj); \
- return sprintf(buf, _format, _value); \
-} \
-static struct kobj_attribute cache_##_name##_attr = \
- __ATTR(_name, 0444, cache_##_name##_show, NULL);
-DEFINE_CACHE_ATTR(size, "%luK\n", index->cache->size >> 10);
-DEFINE_CACHE_ATTR(coherency_line_size, "%u\n", index->cache->line_size);
-DEFINE_CACHE_ATTR(number_of_sets, "%u\n", index->cache->nr_sets);
-DEFINE_CACHE_ATTR(ways_of_associativity, "%u\n", index->cache->associativity);
-DEFINE_CACHE_ATTR(type, "%s\n", cache_type_string[index->cache->type]);
-DEFINE_CACHE_ATTR(level, "%d\n", index->cache->level);
+ this_leaf->level = level + 1;
+ this_leaf->type = type;
+ this_leaf->coherency_line_size = ecag(EXTRACT_LINE_SIZE, level, ti);
+ this_leaf->ways_of_associativity = ecag(EXTRACT_ASSOCIATIVITY,
+ level, ti);
+ this_leaf->size = ecag(EXTRACT_SIZE, level, ti);
-static ssize_t shared_cpu_map_func(struct kobject *kobj, int type, char *buf)
-{
- struct cache_index_dir *index;
- int len;
-
- index = kobj_to_cache_index_dir(kobj);
- len = type ?
- cpulist_scnprintf(buf, PAGE_SIZE - 2, cpumask_of(index->cpu)) :
- cpumask_scnprintf(buf, PAGE_SIZE - 2, cpumask_of(index->cpu));
- len += sprintf(&buf[len], "\n");
- return len;
-}
-
-static ssize_t shared_cpu_map_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- return shared_cpu_map_func(kobj, 0, buf);
+ num_sets = this_leaf->size / this_leaf->coherency_line_size;
+ num_sets /= this_leaf->ways_of_associativity;
+ this_leaf->number_of_sets = num_sets;
+ cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map);
+ if (!private)
+ this_leaf->disable_sysfs = true;
}
-static struct kobj_attribute cache_shared_cpu_map_attr =
- __ATTR(shared_cpu_map, 0444, shared_cpu_map_show, NULL);
-static ssize_t shared_cpu_list_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
+int init_cache_level(unsigned int cpu)
{
- return shared_cpu_map_func(kobj, 1, buf);
-}
-static struct kobj_attribute cache_shared_cpu_list_attr =
- __ATTR(shared_cpu_list, 0444, shared_cpu_list_show, NULL);
-
-static struct attribute *cache_index_default_attrs[] = {
- &cache_type_attr.attr,
- &cache_size_attr.attr,
- &cache_number_of_sets_attr.attr,
- &cache_ways_of_associativity_attr.attr,
- &cache_level_attr.attr,
- &cache_coherency_line_size_attr.attr,
- &cache_shared_cpu_map_attr.attr,
- &cache_shared_cpu_list_attr.attr,
- NULL,
-};
-
-static const struct sysfs_ops cache_index_ops = {
- .show = cache_index_show,
-};
-
-static struct kobj_type cache_index_type = {
- .sysfs_ops = &cache_index_ops,
- .release = cache_index_release,
- .default_attrs = cache_index_default_attrs,
-};
-
-static int cache_create_index_dir(struct cache_dir *cache_dir,
- struct cache *cache, int index, int cpu)
-{
- struct cache_index_dir *index_dir;
- int rc;
-
- index_dir = kzalloc(sizeof(*index_dir), GFP_KERNEL);
- if (!index_dir)
- return -ENOMEM;
- index_dir->cache = cache;
- index_dir->cpu = cpu;
- rc = kobject_init_and_add(&index_dir->kobj, &cache_index_type,
- cache_dir->kobj, "index%d", index);
- if (rc)
- goto out;
- index_dir->next = cache_dir->index;
- cache_dir->index = index_dir;
- return 0;
-out:
- kfree(index_dir);
- return rc;
-}
+ struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
+ unsigned int level = 0, leaves = 0;
+ union cache_topology ct;
+ enum cache_type ctype;
-static int cache_add_cpu(int cpu)
-{
- struct cache_dir *cache_dir;
- struct cache *cache;
- int rc, index = 0;
+ if (!this_cpu_ci)
+ return -EINVAL;
- if (list_empty(&cache_list))
- return 0;
- cache_dir = cache_create_cache_dir(cpu);
- if (!cache_dir)
- return -ENOMEM;
- list_for_each_entry(cache, &cache_list, list) {
- if (!cache->private)
+ ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
+ do {
+ ctype = get_cache_type(&ct.ci[0], level);
+ if (ctype == CACHE_TYPE_NOCACHE)
break;
- rc = cache_create_index_dir(cache_dir, cache, index, cpu);
- if (rc)
- return rc;
- index++;
- }
- return 0;
-}
+ /* Separate instruction and data caches */
+ leaves += (ctype == CACHE_TYPE_SEPARATE) ? 2 : 1;
+ } while (++level < CACHE_MAX_LEVEL);
-static void cache_remove_cpu(int cpu)
-{
- struct cache_index_dir *index, *next;
- struct cache_dir *cache_dir;
+ this_cpu_ci->num_levels = level;
+ this_cpu_ci->num_leaves = leaves;
- cache_dir = cache_dir_cpu[cpu];
- if (!cache_dir)
- return;
- index = cache_dir->index;
- while (index) {
- next = index->next;
- kobject_put(&index->kobj);
- index = next;
- }
- kobject_put(cache_dir->kobj);
- kfree(cache_dir);
- cache_dir_cpu[cpu] = NULL;
+ return 0;
}
-static int cache_hotplug(struct notifier_block *nfb, unsigned long action,
- void *hcpu)
+int populate_cache_leaves(unsigned int cpu)
{
- int cpu = (long)hcpu;
- int rc = 0;
+ unsigned int level, idx, pvt;
+ union cache_topology ct;
+ enum cache_type ctype;
+ struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
+ struct cacheinfo *this_leaf = this_cpu_ci->info_list;
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- rc = cache_add_cpu(cpu);
- if (rc)
- cache_remove_cpu(cpu);
- break;
- case CPU_DEAD:
- cache_remove_cpu(cpu);
- break;
+ ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
+ for (idx = 0, level = 0; level < this_cpu_ci->num_levels &&
+ idx < this_cpu_ci->num_leaves; idx++, level++) {
+ if (!this_leaf)
+ return -EINVAL;
+
+ pvt = (ct.ci[level].scope == CACHE_SCOPE_PRIVATE) ? 1 : 0;
+ ctype = get_cache_type(&ct.ci[0], level);
+ if (ctype == CACHE_TYPE_SEPARATE) {
+ ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_DATA, level);
+ ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_INST, level);
+ } else {
+ ci_leaf_init(this_leaf++, pvt, ctype, level);
+ }
}
- return rc ? NOTIFY_BAD : NOTIFY_OK;
-}
-
-static int __init cache_init(void)
-{
- int cpu;
-
- if (!test_facility(34))
- return 0;
- cache_build_info();
-
- cpu_notifier_register_begin();
- for_each_online_cpu(cpu)
- cache_add_cpu(cpu);
- __hotcpu_notifier(cache_hotplug, 0);
- cpu_notifier_register_done();
return 0;
}
-device_initcall(cache_init);
INSTR_RSI_RRP,
INSTR_RSL_LRDFU, INSTR_RSL_R0RD,
INSTR_RSY_AARD, INSTR_RSY_CCRD, INSTR_RSY_RRRD, INSTR_RSY_RURD,
- INSTR_RSY_RDRM,
+ INSTR_RSY_RDRM, INSTR_RSY_RMRD,
INSTR_RS_AARD, INSTR_RS_CCRD, INSTR_RS_R0RD, INSTR_RS_RRRD,
INSTR_RS_RURD,
INSTR_RXE_FRRD, INSTR_RXE_RRRD, INSTR_RXE_RRRDM,
[U16_32] = { 16, 32, 0 },
[J16_16] = { 16, 16, OPERAND_PCREL },
[J16_32] = { 16, 32, OPERAND_PCREL },
- [I16_32] = { 16, 32, OPERAND_SIGNED },
[I24_24] = { 24, 24, OPERAND_SIGNED },
[J32_16] = { 32, 16, OPERAND_PCREL },
[I32_16] = { 32, 16, OPERAND_SIGNED },
[INSTR_RSY_AARD] = { 0xff, A_8,A_12,D20_20,B_16,0,0 },
[INSTR_RSY_CCRD] = { 0xff, C_8,C_12,D20_20,B_16,0,0 },
[INSTR_RSY_RDRM] = { 0xff, R_8,D20_20,B_16,U4_12,0,0 },
+ [INSTR_RSY_RMRD] = { 0xff, R_8,U4_12,D20_20,B_16,0,0 },
[INSTR_RSY_RRRD] = { 0xff, R_8,R_12,D20_20,B_16,0,0 },
[INSTR_RSY_RURD] = { 0xff, R_8,U4_12,D20_20,B_16,0,0 },
[INSTR_RS_AARD] = { 0xff, A_8,A_12,D_20,B_16,0,0 },
LONG_INSN_VERLLV,
LONG_INSN_VESRAV,
LONG_INSN_VESRLV,
- LONG_INSN_VSBCBI
+ LONG_INSN_VSBCBI,
+ LONG_INSN_STCCTM
};
static char *long_insn_name[] = {
[LONG_INSN_VESRAV] = "vesrav",
[LONG_INSN_VESRLV] = "vesrlv",
[LONG_INSN_VSBCBI] = "vsbcbi",
+ [LONG_INSN_STCCTM] = "stcctm",
};
static struct s390_insn opcode[] = {
{ "lric", 0x60, INSTR_RSY_RDRM },
{ "stric", 0x61, INSTR_RSY_RDRM },
{ "mric", 0x62, INSTR_RSY_RDRM },
+ { { 0, LONG_INSN_STCCTM }, 0x17, INSTR_RSY_RMRD },
#endif
{ "rll", 0x1d, INSTR_RSY_RRRD },
{ "mvclu", 0x8e, INSTR_RSY_RRRD },
S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_LC;
if (test_facility(129))
S390_lowcore.machine_flags |= MACHINE_FLAG_VX;
+ if (test_facility(128))
+ S390_lowcore.machine_flags |= MACHINE_FLAG_CAD;
#endif
}
+static int __init nocad_setup(char *str)
+{
+ S390_lowcore.machine_flags &= ~MACHINE_FLAG_CAD;
+ return 0;
+}
+early_param("nocad", nocad_setup);
+
+static int __init cad_init(void)
+{
+ if (MACHINE_HAS_CAD)
+ /* Enable problem state CAD. */
+ __ctl_set_bit(2, 3);
+ return 0;
+}
+early_initcall(cad_init);
+
static __init void rescue_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
struct fadvise64_64_args;
struct old_sigaction;
+long sys_rt_sigreturn(void);
+long sys_sigreturn(void);
+
long sys_s390_personality(unsigned int personality);
long sys_s390_runtime_instr(int command, int signum);
-
long sys_s390_pci_mmio_write(unsigned long, const void __user *, size_t);
long sys_s390_pci_mmio_read(unsigned long, void __user *, size_t);
#endif /* _ENTRY_H */
* lg %r14,8(%r15) # offset 18
* The jg instruction branches to offset 24 to skip as many instructions
* as possible.
+ * In case we use gcc's hotpatch feature the original and also the disabled
+ * function prologue contains only a single six byte instruction and looks
+ * like this:
+ * > brcl 0,0 # offset 0
+ * To enable ftrace the code gets patched like above and afterwards looks
+ * like this:
+ * > brasl %r0,ftrace_caller # offset 0
*/
unsigned long ftrace_plt;
int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
unsigned long addr)
{
- struct ftrace_insn insn;
- unsigned short op;
- void *from, *to;
- size_t size;
-
- ftrace_generate_nop_insn(&insn);
- size = sizeof(insn);
- from = &insn;
- to = (void *) rec->ip;
- if (probe_kernel_read(&op, (void *) rec->ip, sizeof(op)))
+ struct ftrace_insn orig, new, old;
+
+ if (probe_kernel_read(&old, (void *) rec->ip, sizeof(old)))
return -EFAULT;
- /*
- * If we find a breakpoint instruction, a kprobe has been placed
- * at the beginning of the function. We write the constant
- * KPROBE_ON_FTRACE_NOP into the remaining four bytes of the original
- * instruction so that the kprobes handler can execute a nop, if it
- * reaches this breakpoint.
- */
- if (op == BREAKPOINT_INSTRUCTION) {
- size -= 2;
- from += 2;
- to += 2;
- insn.disp = KPROBE_ON_FTRACE_NOP;
+ if (addr == MCOUNT_ADDR) {
+ /* Initial code replacement */
+#ifdef CC_USING_HOTPATCH
+ /* We expect to see brcl 0,0 */
+ ftrace_generate_nop_insn(&orig);
+#else
+ /* We expect to see stg r14,8(r15) */
+ orig.opc = 0xe3e0;
+ orig.disp = 0xf0080024;
+#endif
+ ftrace_generate_nop_insn(&new);
+ } else if (old.opc == BREAKPOINT_INSTRUCTION) {
+ /*
+ * If we find a breakpoint instruction, a kprobe has been
+ * placed at the beginning of the function. We write the
+ * constant KPROBE_ON_FTRACE_NOP into the remaining four
+ * bytes of the original instruction so that the kprobes
+ * handler can execute a nop, if it reaches this breakpoint.
+ */
+ new.opc = orig.opc = BREAKPOINT_INSTRUCTION;
+ orig.disp = KPROBE_ON_FTRACE_CALL;
+ new.disp = KPROBE_ON_FTRACE_NOP;
+ } else {
+ /* Replace ftrace call with a nop. */
+ ftrace_generate_call_insn(&orig, rec->ip);
+ ftrace_generate_nop_insn(&new);
}
- if (probe_kernel_write(to, from, size))
+ /* Verify that the to be replaced code matches what we expect. */
+ if (memcmp(&orig, &old, sizeof(old)))
+ return -EINVAL;
+ if (probe_kernel_write((void *) rec->ip, &new, sizeof(new)))
return -EPERM;
return 0;
}
int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
- struct ftrace_insn insn;
- unsigned short op;
- void *from, *to;
- size_t size;
-
- ftrace_generate_call_insn(&insn, rec->ip);
- size = sizeof(insn);
- from = &insn;
- to = (void *) rec->ip;
- if (probe_kernel_read(&op, (void *) rec->ip, sizeof(op)))
+ struct ftrace_insn orig, new, old;
+
+ if (probe_kernel_read(&old, (void *) rec->ip, sizeof(old)))
return -EFAULT;
- /*
- * If we find a breakpoint instruction, a kprobe has been placed
- * at the beginning of the function. We write the constant
- * KPROBE_ON_FTRACE_CALL into the remaining four bytes of the original
- * instruction so that the kprobes handler can execute a brasl if it
- * reaches this breakpoint.
- */
- if (op == BREAKPOINT_INSTRUCTION) {
- size -= 2;
- from += 2;
- to += 2;
- insn.disp = KPROBE_ON_FTRACE_CALL;
+ if (old.opc == BREAKPOINT_INSTRUCTION) {
+ /*
+ * If we find a breakpoint instruction, a kprobe has been
+ * placed at the beginning of the function. We write the
+ * constant KPROBE_ON_FTRACE_CALL into the remaining four
+ * bytes of the original instruction so that the kprobes
+ * handler can execute a brasl if it reaches this breakpoint.
+ */
+ new.opc = orig.opc = BREAKPOINT_INSTRUCTION;
+ orig.disp = KPROBE_ON_FTRACE_NOP;
+ new.disp = KPROBE_ON_FTRACE_CALL;
+ } else {
+ /* Replace nop with an ftrace call. */
+ ftrace_generate_nop_insn(&orig);
+ ftrace_generate_call_insn(&new, rec->ip);
}
- if (probe_kernel_write(to, from, size))
+ /* Verify that the to be replaced code matches what we expect. */
+ if (memcmp(&orig, &old, sizeof(old)))
+ return -EINVAL;
+ if (probe_kernel_write((void *) rec->ip, &new, sizeof(new)))
return -EPERM;
return 0;
}
# followed by the facility words.
#if defined(CONFIG_64BIT)
-#if defined(CONFIG_MARCH_ZEC12)
+#if defined(CONFIG_MARCH_Z13)
+ .long 3, 0xc100eff2, 0xf46ce800, 0x00400000
+#elif defined(CONFIG_MARCH_ZEC12)
.long 3, 0xc100eff2, 0xf46ce800, 0x00400000
#elif defined(CONFIG_MARCH_Z196)
.long 2, 0xc100eff2, 0xf46c0000
u32 dump_prefix_page;
-void s390_reset_system(void (*func)(void *), void *data)
+void s390_reset_system(void (*fn_pre)(void),
+ void (*fn_post)(void *), void *data)
{
struct _lowcore *lc;
/* Store status at absolute zero */
store_status();
+ /* Call function before reset */
+ if (fn_pre)
+ fn_pre();
do_reset_calls();
- if (func)
- func(data);
+ /* Call function after reset */
+ if (fn_post)
+ fn_post(data);
}
enum jump_label_type type;
};
+static void jump_label_make_nop(struct jump_entry *entry, struct insn *insn)
+{
+ /* brcl 0,0 */
+ insn->opcode = 0xc004;
+ insn->offset = 0;
+}
+
+static void jump_label_make_branch(struct jump_entry *entry, struct insn *insn)
+{
+ /* brcl 15,offset */
+ insn->opcode = 0xc0f4;
+ insn->offset = (entry->target - entry->code) >> 1;
+}
+
+static void jump_label_bug(struct jump_entry *entry, struct insn *insn)
+{
+ unsigned char *ipc = (unsigned char *)entry->code;
+ unsigned char *ipe = (unsigned char *)insn;
+
+ pr_emerg("Jump label code mismatch at %pS [%p]\n", ipc, ipc);
+ pr_emerg("Found: %02x %02x %02x %02x %02x %02x\n",
+ ipc[0], ipc[1], ipc[2], ipc[3], ipc[4], ipc[5]);
+ pr_emerg("Expected: %02x %02x %02x %02x %02x %02x\n",
+ ipe[0], ipe[1], ipe[2], ipe[3], ipe[4], ipe[5]);
+ panic("Corrupted kernel text");
+}
+
+static struct insn orignop = {
+ .opcode = 0xc004,
+ .offset = JUMP_LABEL_NOP_OFFSET >> 1,
+};
+
static void __jump_label_transform(struct jump_entry *entry,
- enum jump_label_type type)
+ enum jump_label_type type,
+ int init)
{
- struct insn insn;
- int rc;
+ struct insn old, new;
if (type == JUMP_LABEL_ENABLE) {
- /* brcl 15,offset */
- insn.opcode = 0xc0f4;
- insn.offset = (entry->target - entry->code) >> 1;
+ jump_label_make_nop(entry, &old);
+ jump_label_make_branch(entry, &new);
} else {
- /* brcl 0,0 */
- insn.opcode = 0xc004;
- insn.offset = 0;
+ jump_label_make_branch(entry, &old);
+ jump_label_make_nop(entry, &new);
}
-
- rc = probe_kernel_write((void *)entry->code, &insn, JUMP_LABEL_NOP_SIZE);
- WARN_ON_ONCE(rc < 0);
+ if (init) {
+ if (memcmp((void *)entry->code, &orignop, sizeof(orignop)))
+ jump_label_bug(entry, &old);
+ } else {
+ if (memcmp((void *)entry->code, &old, sizeof(old)))
+ jump_label_bug(entry, &old);
+ }
+ probe_kernel_write((void *)entry->code, &new, sizeof(new));
}
static int __sm_arch_jump_label_transform(void *data)
{
struct insn_args *args = data;
- __jump_label_transform(args->entry, args->type);
+ __jump_label_transform(args->entry, args->type, 0);
return 0;
}
void arch_jump_label_transform_static(struct jump_entry *entry,
enum jump_label_type type)
{
- __jump_label_transform(entry, type);
+ __jump_label_transform(entry, type, 1);
}
#endif
/*
* If kprobes patches the instruction that is morphed by
* ftrace make sure that kprobes always sees the branch
- * "jg .+24" that skips the mcount block
+ * "jg .+24" that skips the mcount block or the "brcl 0,0"
+ * in case of hotpatch.
*/
ftrace_generate_nop_insn((struct ftrace_insn *)p->ainsn.insn);
p->ainsn.is_ftrace_insn = 1;
return 0;
}
arch_initcall(machine_kdump_pm_init);
-#endif
/*
* Start kdump: We expect here that a store status has been done on our CPU
*/
static void __do_machine_kdump(void *image)
{
-#ifdef CONFIG_CRASH_DUMP
int (*start_kdump)(int) = (void *)((struct kimage *) image)->start;
- setup_regs();
__load_psw_mask(PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA);
start_kdump(1);
-#endif
}
+#endif
/*
* Check if kdump checksums are valid: We call purgatory with parameter "0"
*/
static void __machine_kexec(void *data)
{
- struct kimage *image = data;
-
__arch_local_irq_stosm(0x04); /* enable DAT */
pfault_fini();
tracing_off();
debug_locks_off();
- if (image->type == KEXEC_TYPE_CRASH) {
+#ifdef CONFIG_CRASH_DUMP
+ if (((struct kimage *) data)->type == KEXEC_TYPE_CRASH) {
+
lgr_info_log();
- s390_reset_system(__do_machine_kdump, data);
- } else {
- s390_reset_system(__do_machine_kexec, data);
- }
+ s390_reset_system(setup_regs, __do_machine_kdump, data);
+ } else
+#endif
+ s390_reset_system(NULL, __do_machine_kexec, data);
disabled_wait((unsigned long) __builtin_return_address(0));
}
.globl ftrace_regs_caller
.set ftrace_regs_caller,ftrace_caller
lgr %r1,%r15
+#ifndef CC_USING_HOTPATCH
aghi %r0,MCOUNT_RETURN_FIXUP
+#endif
aghi %r15,-STACK_FRAME_SIZE
stg %r1,__SF_BACKCHAIN(%r15)
stg %r1,(STACK_PTREGS_GPRS+15*8)(%r15)
{
}
+#ifdef CONFIG_64BIT
+void arch_release_task_struct(struct task_struct *tsk)
+{
+ if (tsk->thread.vxrs)
+ kfree(tsk->thread.vxrs);
+}
+#endif
+
int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
unsigned long arg, struct task_struct *p)
{
ret = PAGE_ALIGN(mm->brk + brk_rnd());
return (ret > mm->brk) ? ret : mm->brk;
}
-
-unsigned long randomize_et_dyn(unsigned long base)
-{
- unsigned long ret;
-
- if (!(current->flags & PF_RANDOMIZE))
- return base;
- ret = PAGE_ALIGN(base + brk_rnd());
- return (ret > base) ? ret : base;
-}
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/delay.h>
#include <linux/cpu.h>
#include <asm/elf.h>
#include <asm/lowcore.h>
#include <asm/param.h>
+#include <asm/smp.h>
static DEFINE_PER_CPU(struct cpuid, cpu_id);
+void cpu_relax(void)
+{
+ if (!smp_cpu_mtid && MACHINE_HAS_DIAG44)
+ asm volatile("diag 0,0,0x44");
+ barrier();
+}
+EXPORT_SYMBOL(cpu_relax);
+
/*
* cpu_init - initializes state that is per-CPU.
*/
#ifdef CONFIG_64BIT
tm LC_AR_MODE_ID,1
jno .Lesa3
- lmh %r6,%r15,96(%r15) # store upper register halves
+ lgfr %r2,%r2 # sign extend return value
+ lmh %r6,%r15,96(%r15) # restore upper register halves
ahi %r15,80
.Lesa3:
#endif
case 0x2828:
strcpy(elf_platform, "zEC12");
break;
+ case 0x2964:
+ strcpy(elf_platform, "z13");
+ break;
}
}
};
static u8 boot_cpu_type;
-static u16 boot_cpu_address;
static struct pcpu pcpu_devices[NR_CPUS];
+unsigned int smp_cpu_mt_shift;
+EXPORT_SYMBOL(smp_cpu_mt_shift);
+
+unsigned int smp_cpu_mtid;
+EXPORT_SYMBOL(smp_cpu_mtid);
+
+static unsigned int smp_max_threads __initdata = -1U;
+
+static int __init early_nosmt(char *s)
+{
+ smp_max_threads = 1;
+ return 0;
+}
+early_param("nosmt", early_nosmt);
+
+static int __init early_smt(char *s)
+{
+ get_option(&s, &smp_max_threads);
+ return 0;
+}
+early_param("smt", early_smt);
+
/*
* The smp_cpu_state_mutex must be held when changing the state or polarization
* member of a pcpu data structure within the pcpu_devices arreay.
/*
* Find struct pcpu by cpu address.
*/
-static struct pcpu *pcpu_find_address(const struct cpumask *mask, int address)
+static struct pcpu *pcpu_find_address(const struct cpumask *mask, u16 address)
{
int cpu;
for (;;) ;
}
+/*
+ * Enable additional logical cpus for multi-threading.
+ */
+static int pcpu_set_smt(unsigned int mtid)
+{
+ register unsigned long reg1 asm ("1") = (unsigned long) mtid;
+ int cc;
+
+ if (smp_cpu_mtid == mtid)
+ return 0;
+ asm volatile(
+ " sigp %1,0,%2 # sigp set multi-threading\n"
+ " ipm %0\n"
+ " srl %0,28\n"
+ : "=d" (cc) : "d" (reg1), "K" (SIGP_SET_MULTI_THREADING)
+ : "cc");
+ if (cc == 0) {
+ smp_cpu_mtid = mtid;
+ smp_cpu_mt_shift = 0;
+ while (smp_cpu_mtid >= (1U << smp_cpu_mt_shift))
+ smp_cpu_mt_shift++;
+ pcpu_devices[0].address = stap();
+ }
+ return cc;
+}
+
/*
* Call function on an online CPU.
*/
#ifdef CONFIG_CRASH_DUMP
-static void __init smp_get_save_area(int cpu, u16 address)
+static inline void __smp_store_cpu_state(int cpu, u16 address, int is_boot_cpu)
{
void *lc = pcpu_devices[0].lowcore;
struct save_area_ext *sa_ext;
unsigned long vx_sa;
- if (is_kdump_kernel())
- return;
- if (!OLDMEM_BASE && (address == boot_cpu_address ||
- ipl_info.type != IPL_TYPE_FCP_DUMP))
- return;
sa_ext = dump_save_area_create(cpu);
if (!sa_ext)
panic("could not allocate memory for save area\n");
- if (address == boot_cpu_address) {
- /* Copy the registers of the boot cpu. */
+ if (is_boot_cpu) {
+ /* Copy the registers of the boot CPU. */
copy_oldmem_page(1, (void *) &sa_ext->sa, sizeof(sa_ext->sa),
SAVE_AREA_BASE - PAGE_SIZE, 0);
if (MACHINE_HAS_VX)
free_page(vx_sa);
}
+/*
+ * Collect CPU state of the previous, crashed system.
+ * There are four cases:
+ * 1) standard zfcp dump
+ * condition: OLDMEM_BASE == NULL && ipl_info.type == IPL_TYPE_FCP_DUMP
+ * The state for all CPUs except the boot CPU needs to be collected
+ * with sigp stop-and-store-status. The boot CPU state is located in
+ * the absolute lowcore of the memory stored in the HSA. The zcore code
+ * will allocate the save area and copy the boot CPU state from the HSA.
+ * 2) stand-alone kdump for SCSI (zfcp dump with swapped memory)
+ * condition: OLDMEM_BASE != NULL && ipl_info.type == IPL_TYPE_FCP_DUMP
+ * The state for all CPUs except the boot CPU needs to be collected
+ * with sigp stop-and-store-status. The firmware or the boot-loader
+ * stored the registers of the boot CPU in the absolute lowcore in the
+ * memory of the old system.
+ * 3) kdump and the old kernel did not store the CPU state,
+ * or stand-alone kdump for DASD
+ * condition: OLDMEM_BASE != NULL && !is_kdump_kernel()
+ * The state for all CPUs except the boot CPU needs to be collected
+ * with sigp stop-and-store-status. The kexec code or the boot-loader
+ * stored the registers of the boot CPU in the memory of the old system.
+ * 4) kdump and the old kernel stored the CPU state
+ * condition: OLDMEM_BASE != NULL && is_kdump_kernel()
+ * The state of all CPUs is stored in ELF sections in the memory of the
+ * old system. The ELF sections are picked up by the crash_dump code
+ * via elfcorehdr_addr.
+ */
+static void __init smp_store_cpu_states(struct sclp_cpu_info *info)
+{
+ unsigned int cpu, address, i, j;
+ int is_boot_cpu;
+
+ if (is_kdump_kernel())
+ /* Previous system stored the CPU states. Nothing to do. */
+ return;
+ if (!(OLDMEM_BASE || ipl_info.type == IPL_TYPE_FCP_DUMP))
+ /* No previous system present, normal boot. */
+ return;
+ /* Set multi-threading state to the previous system. */
+ pcpu_set_smt(sclp_get_mtid_prev());
+ /* Collect CPU states. */
+ cpu = 0;
+ for (i = 0; i < info->configured; i++) {
+ /* Skip CPUs with different CPU type. */
+ if (info->has_cpu_type && info->cpu[i].type != boot_cpu_type)
+ continue;
+ for (j = 0; j <= smp_cpu_mtid; j++, cpu++) {
+ address = (info->cpu[i].core_id << smp_cpu_mt_shift) + j;
+ is_boot_cpu = (address == pcpu_devices[0].address);
+ if (is_boot_cpu && !OLDMEM_BASE)
+ /* Skip boot CPU for standard zfcp dump. */
+ continue;
+ /* Get state for this CPu. */
+ __smp_store_cpu_state(cpu, address, is_boot_cpu);
+ }
+ }
+}
+
int smp_store_status(int cpu)
{
unsigned long vx_sa;
return 0;
}
-#else /* CONFIG_CRASH_DUMP */
-
-static inline void smp_get_save_area(int cpu, u16 address) { }
-
#endif /* CONFIG_CRASH_DUMP */
void smp_cpu_set_polarization(int cpu, int val)
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (info && (use_sigp_detection || sclp_get_cpu_info(info))) {
use_sigp_detection = 1;
- for (address = 0; address <= MAX_CPU_ADDRESS; address++) {
+ for (address = 0; address <= MAX_CPU_ADDRESS;
+ address += (1U << smp_cpu_mt_shift)) {
if (__pcpu_sigp_relax(address, SIGP_SENSE, 0, NULL) ==
SIGP_CC_NOT_OPERATIONAL)
continue;
- info->cpu[info->configured].address = address;
+ info->cpu[info->configured].core_id =
+ address >> smp_cpu_mt_shift;
info->configured++;
}
info->combined = info->configured;
{
struct pcpu *pcpu;
cpumask_t avail;
- int cpu, nr, i;
+ int cpu, nr, i, j;
+ u16 address;
nr = 0;
cpumask_xor(&avail, cpu_possible_mask, cpu_present_mask);
for (i = 0; (i < info->combined) && (cpu < nr_cpu_ids); i++) {
if (info->has_cpu_type && info->cpu[i].type != boot_cpu_type)
continue;
- if (pcpu_find_address(cpu_present_mask, info->cpu[i].address))
- continue;
- pcpu = pcpu_devices + cpu;
- pcpu->address = info->cpu[i].address;
- pcpu->state = (i >= info->configured) ?
- CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
- smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
- set_cpu_present(cpu, true);
- if (sysfs_add && smp_add_present_cpu(cpu) != 0)
- set_cpu_present(cpu, false);
- else
- nr++;
- cpu = cpumask_next(cpu, &avail);
+ address = info->cpu[i].core_id << smp_cpu_mt_shift;
+ for (j = 0; j <= smp_cpu_mtid; j++) {
+ if (pcpu_find_address(cpu_present_mask, address + j))
+ continue;
+ pcpu = pcpu_devices + cpu;
+ pcpu->address = address + j;
+ pcpu->state =
+ (cpu >= info->configured*(smp_cpu_mtid + 1)) ?
+ CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
+ smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ set_cpu_present(cpu, true);
+ if (sysfs_add && smp_add_present_cpu(cpu) != 0)
+ set_cpu_present(cpu, false);
+ else
+ nr++;
+ cpu = cpumask_next(cpu, &avail);
+ if (cpu >= nr_cpu_ids)
+ break;
+ }
}
return nr;
}
static void __init smp_detect_cpus(void)
{
- unsigned int cpu, c_cpus, s_cpus;
+ unsigned int cpu, mtid, c_cpus, s_cpus;
struct sclp_cpu_info *info;
+ u16 address;
+ /* Get CPU information */
info = smp_get_cpu_info();
if (!info)
panic("smp_detect_cpus failed to allocate memory\n");
+
+ /* Find boot CPU type */
if (info->has_cpu_type) {
- for (cpu = 0; cpu < info->combined; cpu++) {
- if (info->cpu[cpu].address != boot_cpu_address)
- continue;
- /* The boot cpu dictates the cpu type. */
- boot_cpu_type = info->cpu[cpu].type;
- break;
- }
+ address = stap();
+ for (cpu = 0; cpu < info->combined; cpu++)
+ if (info->cpu[cpu].core_id == address) {
+ /* The boot cpu dictates the cpu type. */
+ boot_cpu_type = info->cpu[cpu].type;
+ break;
+ }
+ if (cpu >= info->combined)
+ panic("Could not find boot CPU type");
}
+
+#ifdef CONFIG_CRASH_DUMP
+ /* Collect CPU state of previous system */
+ smp_store_cpu_states(info);
+#endif
+
+ /* Set multi-threading state for the current system */
+ mtid = sclp_get_mtid(boot_cpu_type);
+ mtid = (mtid < smp_max_threads) ? mtid : smp_max_threads - 1;
+ pcpu_set_smt(mtid);
+
+ /* Print number of CPUs */
c_cpus = s_cpus = 0;
for (cpu = 0; cpu < info->combined; cpu++) {
if (info->has_cpu_type && info->cpu[cpu].type != boot_cpu_type)
continue;
- if (cpu < info->configured) {
- smp_get_save_area(c_cpus, info->cpu[cpu].address);
- c_cpus++;
- } else
- s_cpus++;
+ if (cpu < info->configured)
+ c_cpus += smp_cpu_mtid + 1;
+ else
+ s_cpus += smp_cpu_mtid + 1;
}
pr_info("%d configured CPUs, %d standby CPUs\n", c_cpus, s_cpus);
+
+ /* Add CPUs present at boot */
get_online_cpus();
__smp_rescan_cpus(info, 0);
put_online_cpus();
int __cpu_up(unsigned int cpu, struct task_struct *tidle)
{
struct pcpu *pcpu;
- int rc;
+ int base, i, rc;
pcpu = pcpu_devices + cpu;
if (pcpu->state != CPU_STATE_CONFIGURED)
return -EIO;
- if (pcpu_sigp_retry(pcpu, SIGP_INITIAL_CPU_RESET, 0) !=
+ base = cpu - (cpu % (smp_cpu_mtid + 1));
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ if (base + i < nr_cpu_ids)
+ if (cpu_online(base + i))
+ break;
+ }
+ /*
+ * If this is the first CPU of the core to get online
+ * do an initial CPU reset.
+ */
+ if (i > smp_cpu_mtid &&
+ pcpu_sigp_retry(pcpu_devices + base, SIGP_INITIAL_CPU_RESET, 0) !=
SIGP_CC_ORDER_CODE_ACCEPTED)
return -EIO;
{
unsigned int possible, sclp, cpu;
- sclp = sclp_get_max_cpu() ?: nr_cpu_ids;
+ sclp = min(smp_max_threads, sclp_get_mtid_max() + 1);
+ sclp = sclp_get_max_cpu()*sclp ?: nr_cpu_ids;
possible = setup_possible_cpus ?: nr_cpu_ids;
possible = min(possible, sclp);
for (cpu = 0; cpu < possible && cpu < nr_cpu_ids; cpu++)
{
struct pcpu *pcpu = pcpu_devices;
- boot_cpu_address = stap();
pcpu->state = CPU_STATE_CONFIGURED;
- pcpu->address = boot_cpu_address;
+ pcpu->address = stap();
pcpu->lowcore = (struct _lowcore *)(unsigned long) store_prefix();
pcpu->async_stack = S390_lowcore.async_stack - ASYNC_SIZE
+ STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
const char *buf, size_t count)
{
struct pcpu *pcpu;
- int cpu, val, rc;
+ int cpu, val, rc, i;
char delim;
if (sscanf(buf, "%d %c", &val, &delim) != 1)
rc = -EBUSY;
/* disallow configuration changes of online cpus and cpu 0 */
cpu = dev->id;
- if (cpu_online(cpu) || cpu == 0)
+ cpu -= cpu % (smp_cpu_mtid + 1);
+ if (cpu == 0)
goto out;
+ for (i = 0; i <= smp_cpu_mtid; i++)
+ if (cpu_online(cpu + i))
+ goto out;
pcpu = pcpu_devices + cpu;
rc = 0;
switch (val) {
case 0:
if (pcpu->state != CPU_STATE_CONFIGURED)
break;
- rc = sclp_cpu_deconfigure(pcpu->address);
+ rc = sclp_cpu_deconfigure(pcpu->address >> smp_cpu_mt_shift);
if (rc)
break;
- pcpu->state = CPU_STATE_STANDBY;
- smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ if (cpu + i >= nr_cpu_ids || !cpu_present(cpu + i))
+ continue;
+ pcpu[i].state = CPU_STATE_STANDBY;
+ smp_cpu_set_polarization(cpu + i,
+ POLARIZATION_UNKNOWN);
+ }
topology_expect_change();
break;
case 1:
if (pcpu->state != CPU_STATE_STANDBY)
break;
- rc = sclp_cpu_configure(pcpu->address);
+ rc = sclp_cpu_configure(pcpu->address >> smp_cpu_mt_shift);
if (rc)
break;
- pcpu->state = CPU_STATE_CONFIGURED;
- smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ if (cpu + i >= nr_cpu_ids || !cpu_present(cpu + i))
+ continue;
+ pcpu[i].state = CPU_STATE_CONFIGURED;
+ smp_cpu_set_polarization(cpu + i,
+ POLARIZATION_UNKNOWN);
+ }
topology_expect_change();
break;
default:
seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
+ if (info->mt_installed & 0x80) {
+ seq_printf(m, "LPAR CPUs G-MTID: %d\n",
+ info->mt_general & 0x1f);
+ seq_printf(m, "LPAR CPUs S-MTID: %d\n",
+ info->mt_installed & 0x1f);
+ seq_printf(m, "LPAR CPUs PS-MTID: %d\n",
+ info->mt_psmtid & 0x1f);
+ }
}
static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
return mask;
}
-static struct mask_info *add_cpus_to_mask(struct topology_cpu *tl_cpu,
+static cpumask_t cpu_thread_map(unsigned int cpu)
+{
+ cpumask_t mask;
+ int i;
+
+ cpumask_copy(&mask, cpumask_of(cpu));
+ if (!topology_enabled || !MACHINE_HAS_TOPOLOGY)
+ return mask;
+ cpu -= cpu % (smp_cpu_mtid + 1);
+ for (i = 0; i <= smp_cpu_mtid; i++)
+ if (cpu_present(cpu + i))
+ cpumask_set_cpu(cpu + i, &mask);
+ return mask;
+}
+
+static struct mask_info *add_cpus_to_mask(struct topology_core *tl_core,
struct mask_info *book,
struct mask_info *socket,
int one_socket_per_cpu)
{
- unsigned int cpu;
+ unsigned int core;
- for_each_set_bit(cpu, &tl_cpu->mask[0], TOPOLOGY_CPU_BITS) {
- unsigned int rcpu;
- int lcpu;
+ for_each_set_bit(core, &tl_core->mask[0], TOPOLOGY_CORE_BITS) {
+ unsigned int rcore;
+ int lcpu, i;
- rcpu = TOPOLOGY_CPU_BITS - 1 - cpu + tl_cpu->origin;
- lcpu = smp_find_processor_id(rcpu);
+ rcore = TOPOLOGY_CORE_BITS - 1 - core + tl_core->origin;
+ lcpu = smp_find_processor_id(rcore << smp_cpu_mt_shift);
if (lcpu < 0)
continue;
- cpumask_set_cpu(lcpu, &book->mask);
- cpu_topology[lcpu].book_id = book->id;
- cpumask_set_cpu(lcpu, &socket->mask);
- cpu_topology[lcpu].core_id = rcpu;
- if (one_socket_per_cpu) {
- cpu_topology[lcpu].socket_id = rcpu;
- socket = socket->next;
- } else {
- cpu_topology[lcpu].socket_id = socket->id;
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ cpu_topology[lcpu + i].book_id = book->id;
+ cpu_topology[lcpu + i].core_id = rcore;
+ cpu_topology[lcpu + i].thread_id = lcpu + i;
+ cpumask_set_cpu(lcpu + i, &book->mask);
+ cpumask_set_cpu(lcpu + i, &socket->mask);
+ if (one_socket_per_cpu)
+ cpu_topology[lcpu + i].socket_id = rcore;
+ else
+ cpu_topology[lcpu + i].socket_id = socket->id;
+ smp_cpu_set_polarization(lcpu + i, tl_core->pp);
}
- smp_cpu_set_polarization(lcpu, tl_cpu->pp);
+ if (one_socket_per_cpu)
+ socket = socket->next;
}
return socket;
}
static union topology_entry *next_tle(union topology_entry *tle)
{
if (!tle->nl)
- return (union topology_entry *)((struct topology_cpu *)tle + 1);
+ return (union topology_entry *)((struct topology_core *)tle + 1);
return (union topology_entry *)((struct topology_container *)tle + 1);
}
spin_lock_irqsave(&topology_lock, flags);
for_each_possible_cpu(cpu) {
+ cpu_topology[cpu].thread_mask = cpu_thread_map(cpu);
cpu_topology[cpu].core_mask = cpu_group_map(&socket_info, cpu);
cpu_topology[cpu].book_mask = cpu_group_map(&book_info, cpu);
if (!MACHINE_HAS_TOPOLOGY) {
+ cpu_topology[cpu].thread_id = cpu;
cpu_topology[cpu].core_id = cpu;
cpu_topology[cpu].socket_id = cpu;
cpu_topology[cpu].book_id = cpu;
return sysfs_create_group(&cpu->dev.kobj, &topology_cpu_attr_group);
}
+const struct cpumask *cpu_thread_mask(int cpu)
+{
+ return &cpu_topology[cpu].thread_mask;
+}
+
+
const struct cpumask *cpu_coregroup_mask(int cpu)
{
return &cpu_topology[cpu].core_mask;
}
static struct sched_domain_topology_level s390_topology[] = {
+ { cpu_thread_mask, cpu_smt_flags, SD_INIT_NAME(SMT) },
{ cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
{ cpu_book_mask, SD_INIT_NAME(BOOK) },
{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
#include <asm/cputime.h>
#include <asm/vtimer.h>
#include <asm/vtime.h>
+#include <asm/cpu_mf.h>
+#include <asm/smp.h>
static void virt_timer_expire(void);
static atomic64_t virt_timer_current;
static atomic64_t virt_timer_elapsed;
+static DEFINE_PER_CPU(u64, mt_cycles[32]);
+static DEFINE_PER_CPU(u64, mt_scaling_mult) = { 1 };
+static DEFINE_PER_CPU(u64, mt_scaling_div) = { 1 };
+
static inline u64 get_vtimer(void)
{
u64 timer;
{
struct thread_info *ti = task_thread_info(tsk);
u64 timer, clock, user, system, steal;
+ u64 user_scaled, system_scaled;
+ int i;
timer = S390_lowcore.last_update_timer;
clock = S390_lowcore.last_update_clock;
S390_lowcore.system_timer += timer - S390_lowcore.last_update_timer;
S390_lowcore.steal_timer += S390_lowcore.last_update_clock - clock;
+ /* Do MT utilization calculation */
+ if (smp_cpu_mtid) {
+ u64 cycles_new[32], *cycles_old;
+ u64 delta, mult, div;
+
+ cycles_old = this_cpu_ptr(mt_cycles);
+ if (stcctm5(smp_cpu_mtid + 1, cycles_new) < 2) {
+ mult = div = 0;
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ delta = cycles_new[i] - cycles_old[i];
+ mult += delta;
+ div += (i + 1) * delta;
+ }
+ if (mult > 0) {
+ /* Update scaling factor */
+ __this_cpu_write(mt_scaling_mult, mult);
+ __this_cpu_write(mt_scaling_div, div);
+ memcpy(cycles_old, cycles_new,
+ sizeof(u64) * (smp_cpu_mtid + 1));
+ }
+ }
+ }
+
user = S390_lowcore.user_timer - ti->user_timer;
S390_lowcore.steal_timer -= user;
ti->user_timer = S390_lowcore.user_timer;
- account_user_time(tsk, user, user);
system = S390_lowcore.system_timer - ti->system_timer;
S390_lowcore.steal_timer -= system;
ti->system_timer = S390_lowcore.system_timer;
- account_system_time(tsk, hardirq_offset, system, system);
+
+ user_scaled = user;
+ system_scaled = system;
+ /* Do MT utilization scaling */
+ if (smp_cpu_mtid) {
+ u64 mult = __this_cpu_read(mt_scaling_mult);
+ u64 div = __this_cpu_read(mt_scaling_div);
+
+ user_scaled = (user_scaled * mult) / div;
+ system_scaled = (system_scaled * mult) / div;
+ }
+ account_user_time(tsk, user, user_scaled);
+ account_system_time(tsk, hardirq_offset, system, system_scaled);
steal = S390_lowcore.steal_timer;
if ((s64) steal > 0) {
void vtime_account_irq_enter(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
- u64 timer, system;
+ u64 timer, system, system_scaled;
timer = S390_lowcore.last_update_timer;
S390_lowcore.last_update_timer = get_vtimer();
system = S390_lowcore.system_timer - ti->system_timer;
S390_lowcore.steal_timer -= system;
ti->system_timer = S390_lowcore.system_timer;
- account_system_time(tsk, 0, system, system);
+ system_scaled = system;
+ /* Do MT utilization scaling */
+ if (smp_cpu_mtid) {
+ u64 mult = __this_cpu_read(mt_scaling_mult);
+ u64 div = __this_cpu_read(mt_scaling_div);
+
+ system_scaled = (system_scaled * mult) / div;
+ }
+ account_system_time(tsk, 0, system, system_scaled);
virt_timer_forward(system);
}
#include <linux/smp.h>
#include <asm/io.h>
-int spin_retry = 1000;
+int spin_retry = -1;
+
+static int __init spin_retry_init(void)
+{
+ if (spin_retry < 0)
+ spin_retry = MACHINE_HAS_CAD ? 10 : 1000;
+ return 0;
+}
+early_initcall(spin_retry_init);
/**
* spin_retry= parameter
}
__setup("spin_retry=", spin_retry_setup);
+static inline void _raw_compare_and_delay(unsigned int *lock, unsigned int old)
+{
+ asm(".insn rsy,0xeb0000000022,%0,0,%1" : : "d" (old), "Q" (*lock));
+}
+
void arch_spin_lock_wait(arch_spinlock_t *lp)
{
unsigned int cpu = SPINLOCK_LOCKVAL;
/* Loop for a while on the lock value. */
count = spin_retry;
do {
+ if (MACHINE_HAS_CAD)
+ _raw_compare_and_delay(&lp->lock, owner);
owner = ACCESS_ONCE(lp->lock);
} while (owner && count-- > 0);
if (!owner)
/* Loop for a while on the lock value. */
count = spin_retry;
do {
+ if (MACHINE_HAS_CAD)
+ _raw_compare_and_delay(&lp->lock, owner);
owner = ACCESS_ONCE(lp->lock);
} while (owner && count-- > 0);
if (!owner)
int arch_spin_trylock_retry(arch_spinlock_t *lp)
{
+ unsigned int cpu = SPINLOCK_LOCKVAL;
+ unsigned int owner;
int count;
- for (count = spin_retry; count > 0; count--)
- if (arch_spin_trylock_once(lp))
- return 1;
+ for (count = spin_retry; count > 0; count--) {
+ owner = ACCESS_ONCE(lp->lock);
+ /* Try to get the lock if it is free. */
+ if (!owner) {
+ if (_raw_compare_and_swap(&lp->lock, 0, cpu))
+ return 1;
+ } else if (MACHINE_HAS_CAD)
+ _raw_compare_and_delay(&lp->lock, owner);
+ }
return 0;
}
EXPORT_SYMBOL(arch_spin_trylock_retry);
}
old = ACCESS_ONCE(rw->lock);
owner = ACCESS_ONCE(rw->owner);
- if ((int) old < 0)
+ if ((int) old < 0) {
+ if (MACHINE_HAS_CAD)
+ _raw_compare_and_delay(&rw->lock, old);
continue;
+ }
if (_raw_compare_and_swap(&rw->lock, old, old + 1))
return;
}
while (count-- > 0) {
old = ACCESS_ONCE(rw->lock);
- if ((int) old < 0)
+ if ((int) old < 0) {
+ if (MACHINE_HAS_CAD)
+ _raw_compare_and_delay(&rw->lock, old);
continue;
+ }
if (_raw_compare_and_swap(&rw->lock, old, old + 1))
return 1;
}
}
if ((old & 0x7fffffff) == 0 && (int) prev >= 0)
break;
+ if (MACHINE_HAS_CAD)
+ _raw_compare_and_delay(&rw->lock, old);
}
}
EXPORT_SYMBOL(_raw_write_lock_wait);
smp_rmb();
if ((old & 0x7fffffff) == 0 && (int) prev >= 0)
break;
+ if (MACHINE_HAS_CAD)
+ _raw_compare_and_delay(&rw->lock, old);
}
}
EXPORT_SYMBOL(_raw_write_lock_wait);
while (count-- > 0) {
old = ACCESS_ONCE(rw->lock);
- if (old)
+ if (old) {
+ if (MACHINE_HAS_CAD)
+ _raw_compare_and_delay(&rw->lock, old);
continue;
+ }
if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000))
return 1;
}
table = table + ((address >> 20) & 0x7ff);
if (bad_address(table))
goto bad;
- pr_cont(KERN_CONT "S:%016lx ", *table);
+ pr_cont("S:%016lx ", *table);
if (*table & (_SEGMENT_ENTRY_INVALID | _SEGMENT_ENTRY_LARGE))
goto out;
table = (unsigned long *)(*table & _SEGMENT_ENTRY_ORIGIN);
return;
if (!printk_ratelimit())
return;
- printk(KERN_ALERT "User process fault: interruption code %04x ilc:%d",
+ printk(KERN_ALERT "User process fault: interruption code %04x ilc:%d ",
regs->int_code & 0xffff, regs->int_code >> 17);
print_vma_addr(KERN_CONT "in ", regs->psw.addr & PSW_ADDR_INSN);
printk(KERN_CONT "\n");
break;
case 0x2827: /* zEC12 */
case 0x2828: /* zEC12 */
- default:
order = 5;
break;
+ case 0x2964: /* z13 */
+ default:
+ order = 7;
+ break;
}
/* Limit number of empty zero pages for small memory sizes */
- if (order > 2 && totalram_pages <= 16384)
- order = 2;
+ while (order > 2 && (totalram_pages >> 10) < (1UL << order))
+ order--;
empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!empty_zero_page)
#include <linux/module.h>
#include <linux/random.h>
#include <linux/compat.h>
+#include <linux/security.h>
#include <asm/pgalloc.h>
+unsigned long mmap_rnd_mask;
+unsigned long mmap_align_mask;
+
static unsigned long stack_maxrandom_size(void)
{
if (!(current->flags & PF_RANDOMIZE))
{
if (!(current->flags & PF_RANDOMIZE))
return 0;
- /* 8MB randomization for mmap_base */
- return (get_random_int() & 0x7ffUL) << PAGE_SHIFT;
+ if (is_32bit_task())
+ return (get_random_int() & 0x7ff) << PAGE_SHIFT;
+ else
+ return (get_random_int() & mmap_rnd_mask) << PAGE_SHIFT;
}
static unsigned long mmap_base_legacy(void)
return STACK_TOP - stack_maxrandom_size() - mmap_rnd() - gap;
}
+unsigned long
+arch_get_unmapped_area(struct file *filp, unsigned long addr,
+ unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma;
+ struct vm_unmapped_area_info info;
+ int do_color_align;
+
+ if (len > TASK_SIZE - mmap_min_addr)
+ return -ENOMEM;
+
+ if (flags & MAP_FIXED)
+ return addr;
+
+ if (addr) {
+ addr = PAGE_ALIGN(addr);
+ vma = find_vma(mm, addr);
+ if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
+ (!vma || addr + len <= vma->vm_start))
+ return addr;
+ }
+
+ do_color_align = 0;
+ if (filp || (flags & MAP_SHARED))
+ do_color_align = !is_32bit_task();
+
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = mm->mmap_base;
+ info.high_limit = TASK_SIZE;
+ info.align_mask = do_color_align ? (mmap_align_mask << PAGE_SHIFT) : 0;
+ info.align_offset = pgoff << PAGE_SHIFT;
+ return vm_unmapped_area(&info);
+}
+
+unsigned long
+arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
+ const unsigned long len, const unsigned long pgoff,
+ const unsigned long flags)
+{
+ struct vm_area_struct *vma;
+ struct mm_struct *mm = current->mm;
+ unsigned long addr = addr0;
+ struct vm_unmapped_area_info info;
+ int do_color_align;
+
+ /* requested length too big for entire address space */
+ if (len > TASK_SIZE - mmap_min_addr)
+ return -ENOMEM;
+
+ if (flags & MAP_FIXED)
+ return addr;
+
+ /* requesting a specific address */
+ if (addr) {
+ addr = PAGE_ALIGN(addr);
+ vma = find_vma(mm, addr);
+ if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
+ (!vma || addr + len <= vma->vm_start))
+ return addr;
+ }
+
+ do_color_align = 0;
+ if (filp || (flags & MAP_SHARED))
+ do_color_align = !is_32bit_task();
+
+ info.flags = VM_UNMAPPED_AREA_TOPDOWN;
+ info.length = len;
+ info.low_limit = max(PAGE_SIZE, mmap_min_addr);
+ info.high_limit = mm->mmap_base;
+ info.align_mask = do_color_align ? (mmap_align_mask << PAGE_SHIFT) : 0;
+ info.align_offset = pgoff << PAGE_SHIFT;
+ addr = vm_unmapped_area(&info);
+
+ /*
+ * A failed mmap() very likely causes application failure,
+ * so fall back to the bottom-up function here. This scenario
+ * can happen with large stack limits and large mmap()
+ * allocations.
+ */
+ if (addr & ~PAGE_MASK) {
+ VM_BUG_ON(addr != -ENOMEM);
+ info.flags = 0;
+ info.low_limit = TASK_UNMAPPED_BASE;
+ info.high_limit = TASK_SIZE;
+ addr = vm_unmapped_area(&info);
+ }
+
+ return addr;
+}
+
+unsigned long randomize_et_dyn(void)
+{
+ unsigned long base;
+
+ base = (STACK_TOP / 3 * 2) & (~mmap_align_mask << PAGE_SHIFT);
+ return base + mmap_rnd();
+}
+
#ifndef CONFIG_64BIT
/*
}
}
+static int __init setup_mmap_rnd(void)
+{
+ struct cpuid cpu_id;
+
+ get_cpu_id(&cpu_id);
+ switch (cpu_id.machine) {
+ case 0x9672:
+ case 0x2064:
+ case 0x2066:
+ case 0x2084:
+ case 0x2086:
+ case 0x2094:
+ case 0x2096:
+ case 0x2097:
+ case 0x2098:
+ case 0x2817:
+ case 0x2818:
+ case 0x2827:
+ case 0x2828:
+ mmap_rnd_mask = 0x7ffUL;
+ mmap_align_mask = 0UL;
+ break;
+ case 0x2964: /* z13 */
+ default:
+ mmap_rnd_mask = 0x3ff80UL;
+ mmap_align_mask = 0x7fUL;
+ break;
+ }
+ return 0;
+}
+early_initcall(setup_mmap_rnd);
+
#endif
table += (gaddr >> 53) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _REGION2_ENTRY_EMPTY,
- gaddr & 0xffe0000000000000))
+ gaddr & 0xffe0000000000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
table += (gaddr >> 42) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _REGION3_ENTRY_EMPTY,
- gaddr & 0xfffffc0000000000))
+ gaddr & 0xfffffc0000000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
table += (gaddr >> 31) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _SEGMENT_ENTRY_EMPTY,
- gaddr & 0xffffffff80000000))
+ gaddr & 0xffffffff80000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
ret = get_pfn(mmio_addr, VM_WRITE, &pfn);
if (ret)
goto out;
- io_addr = (void *)((pfn << PAGE_SHIFT) | (mmio_addr & ~PAGE_MASK));
+ io_addr = (void __iomem *)((pfn << PAGE_SHIFT) | (mmio_addr & ~PAGE_MASK));
ret = -EFAULT;
if ((unsigned long) io_addr < ZPCI_IOMAP_ADDR_BASE)
ret = get_pfn(mmio_addr, VM_READ, &pfn);
if (ret)
goto out;
- io_addr = (void *)((pfn << PAGE_SHIFT) | (mmio_addr & ~PAGE_MASK));
+ io_addr = (void __iomem *)((pfn << PAGE_SHIFT) | (mmio_addr & ~PAGE_MASK));
ret = -EFAULT;
if ((unsigned long) io_addr < ZPCI_IOMAP_ADDR_BASE)
unsigned int dasd_global_profile_level = DASD_PROFILE_OFF;
#ifdef CONFIG_DASD_PROFILE
-struct dasd_profile_info dasd_global_profile_data;
-static struct dentry *dasd_global_profile_dentry;
+struct dasd_profile dasd_global_profile = {
+ .lock = __SPIN_LOCK_UNLOCKED(dasd_global_profile.lock),
+};
static struct dentry *dasd_debugfs_global_entry;
/*
if (++counter >= 31)
break;
- if (dasd_global_profile_level) {
- dasd_global_profile_data.dasd_io_nr_req[counter]++;
+ spin_lock(&dasd_global_profile.lock);
+ if (dasd_global_profile.data) {
+ dasd_global_profile.data->dasd_io_nr_req[counter]++;
if (rq_data_dir(req) == READ)
- dasd_global_profile_data.dasd_read_nr_req[counter]++;
+ dasd_global_profile.data->dasd_read_nr_req[counter]++;
}
+ spin_unlock(&dasd_global_profile.lock);
spin_lock(&block->profile.lock);
if (block->profile.data) {
dasd_profile_counter(irqtime / sectors, irqtimeps_ind);
dasd_profile_counter(endtime, endtime_ind);
- if (dasd_global_profile_level) {
- dasd_profile_end_add_data(&dasd_global_profile_data,
+ spin_lock(&dasd_global_profile.lock);
+ if (dasd_global_profile.data) {
+ dasd_profile_end_add_data(dasd_global_profile.data,
cqr->startdev != block->base,
cqr->cpmode == 1,
rq_data_dir(req) == READ,
irqtime_ind, irqtimeps_ind,
endtime_ind);
}
+ spin_unlock(&dasd_global_profile.lock);
spin_lock(&block->profile.lock);
if (block->profile.data)
spin_unlock_bh(&profile->lock);
}
-void dasd_global_profile_reset(void)
-{
- memset(&dasd_global_profile_data, 0, sizeof(dasd_global_profile_data));
- getnstimeofday(&dasd_global_profile_data.starttod);
-}
-
int dasd_profile_on(struct dasd_profile *profile)
{
struct dasd_profile_info *data;
dasd_profile_reset(prof);
} else if (strncmp(str, "on", 2) == 0) {
rc = dasd_profile_on(prof);
- if (!rc)
- rc = user_len;
+ if (rc)
+ goto out;
+ rc = user_len;
+ if (prof == &dasd_global_profile) {
+ dasd_profile_reset(prof);
+ dasd_global_profile_level = DASD_PROFILE_GLOBAL_ONLY;
+ }
} else if (strncmp(str, "off", 3) == 0) {
+ if (prof == &dasd_global_profile)
+ dasd_global_profile_level = DASD_PROFILE_OFF;
dasd_profile_off(prof);
} else
rc = -EINVAL;
+out:
vfree(buffer);
return rc;
}
.write = dasd_stats_write,
};
-static ssize_t dasd_stats_global_write(struct file *file,
- const char __user *user_buf,
- size_t user_len, loff_t *pos)
-{
- char *buffer, *str;
- ssize_t rc;
-
- if (user_len > 65536)
- user_len = 65536;
- buffer = dasd_get_user_string(user_buf, user_len);
- if (IS_ERR(buffer))
- return PTR_ERR(buffer);
- str = skip_spaces(buffer);
- rc = user_len;
- if (strncmp(str, "reset", 5) == 0) {
- dasd_global_profile_reset();
- } else if (strncmp(str, "on", 2) == 0) {
- dasd_global_profile_reset();
- dasd_global_profile_level = DASD_PROFILE_GLOBAL_ONLY;
- } else if (strncmp(str, "off", 3) == 0) {
- dasd_global_profile_level = DASD_PROFILE_OFF;
- } else
- rc = -EINVAL;
- vfree(buffer);
- return rc;
-}
-
-static int dasd_stats_global_show(struct seq_file *m, void *v)
-{
- if (!dasd_global_profile_level) {
- seq_puts(m, "disabled\n");
- return 0;
- }
- dasd_stats_seq_print(m, &dasd_global_profile_data);
- return 0;
-}
-
-static int dasd_stats_global_open(struct inode *inode, struct file *file)
-{
- return single_open(file, dasd_stats_global_show, NULL);
-}
-
-static const struct file_operations dasd_stats_global_fops = {
- .owner = THIS_MODULE,
- .open = dasd_stats_global_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = dasd_stats_global_write,
-};
-
static void dasd_profile_init(struct dasd_profile *profile,
struct dentry *base_dentry)
{
static void dasd_statistics_removeroot(void)
{
dasd_global_profile_level = DASD_PROFILE_OFF;
- debugfs_remove(dasd_global_profile_dentry);
- dasd_global_profile_dentry = NULL;
+ dasd_profile_exit(&dasd_global_profile);
debugfs_remove(dasd_debugfs_global_entry);
debugfs_remove(dasd_debugfs_root_entry);
}
static void dasd_statistics_createroot(void)
{
- umode_t mode;
struct dentry *pde;
dasd_debugfs_root_entry = NULL;
- dasd_debugfs_global_entry = NULL;
- dasd_global_profile_dentry = NULL;
pde = debugfs_create_dir("dasd", NULL);
if (!pde || IS_ERR(pde))
goto error;
if (!pde || IS_ERR(pde))
goto error;
dasd_debugfs_global_entry = pde;
-
- mode = (S_IRUSR | S_IWUSR | S_IFREG);
- pde = debugfs_create_file("statistics", mode, dasd_debugfs_global_entry,
- NULL, &dasd_stats_global_fops);
- if (!pde || IS_ERR(pde))
- goto error;
- dasd_global_profile_dentry = pde;
+ dasd_profile_init(&dasd_global_profile, dasd_debugfs_global_entry);
return;
error:
#define DASD_PROFILE_GLOBAL_ONLY 2
extern debug_info_t *dasd_debug_area;
-extern struct dasd_profile_info dasd_global_profile_data;
+extern struct dasd_profile dasd_global_profile;
extern unsigned int dasd_global_profile_level;
extern const struct block_device_operations dasd_device_operations;
void dasd_profile_reset(struct dasd_profile *);
int dasd_profile_on(struct dasd_profile *);
void dasd_profile_off(struct dasd_profile *);
-void dasd_global_profile_reset(void);
char *dasd_get_user_string(const char __user *, size_t);
/* externals in dasd_devmap.c */
struct dasd_profile_info *prof;
int factor;
- /* check for active profiling */
- if (!dasd_global_profile_level) {
+ spin_lock_bh(&dasd_global_profile.lock);
+ prof = dasd_global_profile.data;
+ if (!prof) {
+ spin_unlock_bh(&dasd_global_profile.lock);
seq_printf(m, "Statistics are off - they might be "
"switched on using 'echo set on > "
"/proc/dasd/statistics'\n");
return 0;
}
- prof = &dasd_global_profile_data;
/* prevent counter 'overflow' on output */
for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
dasd_statistics_array(m, prof->dasd_io_time3, factor);
seq_printf(m, "# of req in chanq at enqueuing (1..32) \n");
dasd_statistics_array(m, prof->dasd_io_nr_req, factor);
+ spin_unlock_bh(&dasd_global_profile.lock);
#else
seq_printf(m, "Statistics are not activated in this kernel\n");
#endif
dasd_stats_all_block_off();
goto out_error;
}
- dasd_global_profile_reset();
+ rc = dasd_profile_on(&dasd_global_profile);
+ if (rc) {
+ dasd_stats_all_block_off();
+ goto out_error;
+ }
+ dasd_profile_reset(&dasd_global_profile);
dasd_global_profile_level = DASD_PROFILE_ON;
pr_info("The statistics feature has been switched "
"on\n");
} else if (strcmp(str, "off") == 0) {
- /* switch off and reset statistics profiling */
+ /* switch off statistics profiling */
dasd_global_profile_level = DASD_PROFILE_OFF;
- dasd_global_profile_reset();
+ dasd_profile_off(&dasd_global_profile);
dasd_stats_all_block_off();
pr_info("The statistics feature has been switched "
"off\n");
goto out_parse_error;
} else if (strncmp(str, "reset", 5) == 0) {
/* reset the statistics */
- dasd_global_profile_reset();
+ dasd_profile_reset(&dasd_global_profile);
dasd_stats_all_block_reset();
pr_info("The statistics have been reset\n");
} else
pr_info("All DCSSs that map to device %s are "
"saved\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
- segment_save(entry->segment_name);
+ if (entry->segment_type == SEG_TYPE_EN ||
+ entry->segment_type == SEG_TYPE_SN)
+ pr_warn("DCSS %s is of type SN or EN"
+ " and cannot be saved\n",
+ entry->segment_name);
+ else
+ segment_save(entry->segment_name);
}
} else {
// device is busy => we save it when it becomes
pr_info("Device %s has become idle and is being saved "
"now\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
- segment_save(entry->segment_name);
+ if (entry->segment_type == SEG_TYPE_EN ||
+ entry->segment_type == SEG_TYPE_SN)
+ pr_warn("DCSS %s is of type SN or EN and cannot"
+ " be saved\n", entry->segment_name);
+ else
+ segment_save(entry->segment_name);
}
dev_info->save_pending = 0;
}
rc = hmcdrv_ftp_startup();
if (rc)
- return rc;
+ goto out;
rc = hmcdrv_ftp_do(&ftp);
- free_page((unsigned long) ftp.buf);
hmcdrv_ftp_shutdown();
switch (rc) {
rc = 0; /* clear length (success) */
break;
} /* switch */
-
+out:
+ free_page((unsigned long) ftp.buf);
return rc;
}
EXPORT_SYMBOL(hmcdrv_ftp_probe);
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
-#include <linux/version.h>
#include <linux/stat.h>
#include "hmcdrv_ftp.h"
struct sccb_header header; /* 0-7 */
u16 rnmax; /* 8-9 */
u8 rnsize; /* 10 */
- u8 _reserved0[16 - 11]; /* 11-15 */
+ u8 _pad_11[16 - 11]; /* 11-15 */
u16 ncpurl; /* 16-17 */
u16 cpuoff; /* 18-19 */
- u8 _reserved7[24 - 20]; /* 20-23 */
+ u8 _pad_20[24 - 20]; /* 20-23 */
u8 loadparm[8]; /* 24-31 */
- u8 _reserved1[48 - 32]; /* 32-47 */
+ u8 _pad_32[42 - 32]; /* 32-41 */
+ u8 fac42; /* 42 */
+ u8 fac43; /* 43 */
+ u8 _pad_44[48 - 44]; /* 44-47 */
u64 facilities; /* 48-55 */
- u8 _reserved2a[76 - 56]; /* 56-75 */
+ u8 _pad_56[66 - 56]; /* 56-65 */
+ u8 fac66; /* 66 */
+ u8 _pad_67[76 - 67]; /* 67-83 */
u32 ibc; /* 76-79 */
- u8 _reserved2b[84 - 80]; /* 80-83 */
+ u8 _pad80[84 - 80]; /* 80-83 */
u8 fac84; /* 84 */
u8 fac85; /* 85 */
- u8 _reserved3[91 - 86]; /* 86-90 */
+ u8 _pad_86[91 - 86]; /* 86-90 */
u8 flags; /* 91 */
- u8 _reserved4[100 - 92]; /* 92-99 */
+ u8 _pad_92[100 - 92]; /* 92-99 */
u32 rnsize2; /* 100-103 */
u64 rnmax2; /* 104-111 */
- u8 _reserved5[120 - 112]; /* 112-119 */
+ u8 _pad_112[120 - 112]; /* 112-119 */
u16 hcpua; /* 120-121 */
- u8 _reserved6[4096 - 122]; /* 122-4095 */
+ u8 _pad_122[4096 - 122]; /* 122-4095 */
} __packed __aligned(PAGE_SIZE);
static char sccb_early[PAGE_SIZE] __aligned(PAGE_SIZE) __initdata;
static struct sclp_ipl_info sclp_ipl_info;
static unsigned char sclp_siif;
static u32 sclp_ibc;
+static unsigned int sclp_mtid;
+static unsigned int sclp_mtid_cp;
+static unsigned int sclp_mtid_max;
+static unsigned int sclp_mtid_prev;
u64 sclp_facilities;
u8 sclp_fac84;
boot_cpu_address = stap();
cpue = (void *)sccb + sccb->cpuoff;
for (cpu = 0; cpu < sccb->ncpurl; cpue++, cpu++) {
- if (boot_cpu_address != cpue->address)
+ if (boot_cpu_address != cpue->core_id)
continue;
sclp_siif = cpue->siif;
break;
if (sccb->flags & 0x2)
sclp_ipl_info.has_dump = 1;
memcpy(&sclp_ipl_info.loadparm, &sccb->loadparm, LOADPARM_LEN);
+
+ sclp_mtid = (sccb->fac42 & 0x80) ? (sccb->fac42 & 31) : 0;
+ sclp_mtid_cp = (sccb->fac42 & 0x80) ? (sccb->fac43 & 31) : 0;
+ sclp_mtid_max = max(sclp_mtid, sclp_mtid_cp);
+ sclp_mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
}
bool __init sclp_has_linemode(void)
}
EXPORT_SYMBOL(sclp_get_ibc);
+unsigned int sclp_get_mtid(u8 cpu_type)
+{
+ return cpu_type ? sclp_mtid : sclp_mtid_cp;
+}
+
+unsigned int sclp_get_mtid_max(void)
+{
+ return sclp_mtid_max;
+}
+
+unsigned int sclp_get_mtid_prev(void)
+{
+ return sclp_mtid_prev;
+}
+
/*
* This function will be called after sclp_facilities_detect(), which gets
* called from early.c code. The sclp_facilities_detect() function retrieves
"occurred\n");
return tape_34xx_erp_failed(request, -EIO);
case 0x57:
- if (device->cdev->id.driver_info == tape_3480) {
- /* Attention intercept. */
- return tape_34xx_erp_retry(request);
- } else {
- /* Global status intercept. */
- return tape_34xx_erp_retry(request);
- }
+ /*
+ * 3480: Attention intercept.
+ * 3490: Global status intercept.
+ */
+ return tape_34xx_erp_retry(request);
case 0x5a:
/*
* Tape length incompatible. The tape inserted is too long,
{
struct subchannel_id uninitialized_var(schid);
- s390_reset_system(NULL, NULL);
+ s390_reset_system(NULL, NULL, NULL);
if (reipl_find_schid(devid, &schid) != 0)
panic("IPL Device not found\n");
do_reipl_asm(*((__u32*)&schid));
vfree(set);
}
-void idset_clear(struct idset *set)
-{
- memset(set->bitmap, 0, bitmap_size(set->num_ssid, set->num_id));
-}
-
void idset_fill(struct idset *set)
{
memset(set->bitmap, 0xff, bitmap_size(set->num_ssid, set->num_id));
return idset_contains(set, schid.ssid, schid.sch_no);
}
-int idset_sch_get_first(struct idset *set, struct subchannel_id *schid)
-{
- int ssid = 0;
- int id = 0;
- int rc;
-
- rc = idset_get_first(set, &ssid, &id);
- if (rc) {
- init_subchannel_id(schid);
- schid->ssid = ssid;
- schid->sch_no = id;
- }
- return rc;
-}
-
int idset_is_empty(struct idset *set)
{
return bitmap_empty(set->bitmap, set->num_ssid * set->num_id);
struct idset;
void idset_free(struct idset *set);
-void idset_clear(struct idset *set);
void idset_fill(struct idset *set);
struct idset *idset_sch_new(void);
void idset_sch_del(struct idset *set, struct subchannel_id id);
void idset_sch_del_subseq(struct idset *set, struct subchannel_id schid);
int idset_sch_contains(struct idset *set, struct subchannel_id id);
-int idset_sch_get_first(struct idset *set, struct subchannel_id *id);
int idset_is_empty(struct idset *set);
void idset_add_set(struct idset *to, struct idset *from);
return reg1;
}
+/**
+ * ap_query_facilities(): PQAP(TAPQ) query facilities.
+ * @qid: The AP queue number
+ *
+ * Returns content of general register 2 after the PQAP(TAPQ)
+ * instruction was called.
+ */
+static inline unsigned long ap_query_facilities(ap_qid_t qid)
+{
+ register unsigned long reg0 asm ("0") = qid | 0x00800000UL;
+ register unsigned long reg1 asm ("1");
+ register unsigned long reg2 asm ("2") = 0UL;
+
+ asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */
+ : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc");
+ return reg2;
+}
+
/**
* ap_reset_queue(): Reset adjunct processor queue.
* @qid: The AP queue number
}
EXPORT_SYMBOL(ap_bus_force_rescan);
+/*
+ * ap_test_config(): helper function to extract the nrth bit
+ * within the unsigned int array field.
+ */
+static inline int ap_test_config(unsigned int *field, unsigned int nr)
+{
+ if (nr > 0xFFu)
+ return 0;
+ return ap_test_bit((field + (nr >> 5)), (nr & 0x1f));
+}
+
+/*
+ * ap_test_config_card_id(): Test, whether an AP card ID is configured.
+ * @id AP card ID
+ *
+ * Returns 0 if the card is not configured
+ * 1 if the card is configured or
+ * if the configuration information is not available
+ */
+static inline int ap_test_config_card_id(unsigned int id)
+{
+ if (!ap_configuration)
+ return 1;
+ return ap_test_config(ap_configuration->apm, id);
+}
+
+/*
+ * ap_test_config_domain(): Test, whether an AP usage domain is configured.
+ * @domain AP usage domain ID
+ *
+ * Returns 0 if the usage domain is not configured
+ * 1 if the usage domain is configured or
+ * if the configuration information is not available
+ */
+static inline int ap_test_config_domain(unsigned int domain)
+{
+ if (!ap_configuration) /* QCI not supported */
+ if (domain < 16)
+ return 1; /* then domains 0...15 are configured */
+ else
+ return 0;
+ else
+ return ap_test_config(ap_configuration->aqm, domain);
+}
+
/*
* AP bus attributes.
*/
static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store);
+static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf)
+{
+ ap_qid_t qid;
+ int i, nd, max_domain_id = -1;
+ unsigned long fbits;
+
+ if (ap_configuration) {
+ if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) {
+ for (i = 0; i < AP_DEVICES; i++) {
+ if (!ap_test_config_card_id(i))
+ continue;
+ qid = AP_MKQID(i, ap_domain_index);
+ fbits = ap_query_facilities(qid);
+ if (fbits & (1UL << 57)) {
+ /* the N bit is 0, Nd field is filled */
+ nd = (int)((fbits & 0x00FF0000UL)>>16);
+ if (nd > 0)
+ max_domain_id = nd;
+ else
+ max_domain_id = 15;
+ } else {
+ /* N bit is 1, max 16 domains */
+ max_domain_id = 15;
+ }
+ break;
+ }
+ }
+ } else {
+ /* no APXA support, older machines with max 16 domains */
+ max_domain_id = 15;
+ }
+ return snprintf(buf, PAGE_SIZE, "%d\n", max_domain_id);
+}
+
+static BUS_ATTR(ap_max_domain_id, 0444, ap_max_domain_id_show, NULL);
+
static struct bus_attribute *const ap_bus_attrs[] = {
&bus_attr_ap_domain,
&bus_attr_ap_control_domain_mask,
&bus_attr_poll_thread,
&bus_attr_ap_interrupts,
&bus_attr_poll_timeout,
+ &bus_attr_ap_max_domain_id,
NULL,
};
-static inline int ap_test_config(unsigned int *field, unsigned int nr)
-{
- if (nr > 0xFFu)
- return 0;
- return ap_test_bit((field + (nr >> 5)), (nr & 0x1f));
-}
-
-/*
- * ap_test_config_card_id(): Test, whether an AP card ID is configured.
- * @id AP card ID
- *
- * Returns 0 if the card is not configured
- * 1 if the card is configured or
- * if the configuration information is not available
- */
-static inline int ap_test_config_card_id(unsigned int id)
-{
- if (!ap_configuration)
- return 1;
- return ap_test_config(ap_configuration->apm, id);
-}
-
-/*
- * ap_test_config_domain(): Test, whether an AP usage domain is configured.
- * @domain AP usage domain ID
- *
- * Returns 0 if the usage domain is not configured
- * 1 if the usage domain is configured or
- * if the configuration information is not available
- */
-static inline int ap_test_config_domain(unsigned int domain)
-{
- if (!ap_configuration) /* QCI not supported */
- if (domain < 16)
- return 1; /* then domains 0...15 are configured */
- else
- return 0;
- else
- return ap_test_config(ap_configuration->aqm, domain);
-}
-
/**
* ap_query_configuration(): Query AP configuration information.
*
continue;
}
break;
- case 11:
- ap_dev->device_type = 10;
- break;
default:
ap_dev->device_type = device_type;
}
#define AP_DEVICE_TYPE_CEX3A 8
#define AP_DEVICE_TYPE_CEX3C 9
#define AP_DEVICE_TYPE_CEX4 10
+#define AP_DEVICE_TYPE_CEX5 11
/*
* Known function facilities
#define ZCRYPT_CEX3C 7
#define ZCRYPT_CEX3A 8
#define ZCRYPT_CEX4 10
+#define ZCRYPT_CEX5 11
/**
* Large random numbers are pulled in 4096 byte chunks from the crypto cards
#define CEX4A_SPEED_RATING 900 /* TODO new card, new speed rating */
#define CEX4C_SPEED_RATING 6500 /* TODO new card, new speed rating */
+#define CEX4P_SPEED_RATING 7000 /* TODO new card, new speed rating */
+#define CEX5A_SPEED_RATING 450 /* TODO new card, new speed rating */
+#define CEX5C_SPEED_RATING 3250 /* TODO new card, new speed rating */
+#define CEX5P_SPEED_RATING 3500 /* TODO new card, new speed rating */
#define CEX4A_MAX_MESSAGE_SIZE MSGTYPE50_CRB3_MAX_MSG_SIZE
#define CEX4C_MAX_MESSAGE_SIZE MSGTYPE06_MAX_MSG_SIZE
static struct ap_device_id zcrypt_cex4_ids[] = {
{ AP_DEVICE(AP_DEVICE_TYPE_CEX4) },
+ { AP_DEVICE(AP_DEVICE_TYPE_CEX5) },
{ /* end of list */ },
};
switch (ap_dev->device_type) {
case AP_DEVICE_TYPE_CEX4:
+ case AP_DEVICE_TYPE_CEX5:
if (ap_test_bit(&ap_dev->functions, AP_FUNC_ACCEL)) {
zdev = zcrypt_device_alloc(CEX4A_MAX_MESSAGE_SIZE);
if (!zdev)
return -ENOMEM;
- zdev->type_string = "CEX4A";
+ if (ap_dev->device_type == AP_DEVICE_TYPE_CEX4) {
+ zdev->type_string = "CEX4A";
+ zdev->speed_rating = CEX4A_SPEED_RATING;
+ } else {
+ zdev->type_string = "CEX5A";
+ zdev->speed_rating = CEX5A_SPEED_RATING;
+ }
zdev->user_space_type = ZCRYPT_CEX3A;
zdev->min_mod_size = CEX4A_MIN_MOD_SIZE;
if (ap_test_bit(&ap_dev->functions, AP_FUNC_MEX4K) &&
CEX4A_MAX_MOD_SIZE_2K;
}
zdev->short_crt = 1;
- zdev->speed_rating = CEX4A_SPEED_RATING;
zdev->ops = zcrypt_msgtype_request(MSGTYPE50_NAME,
MSGTYPE50_VARIANT_DEFAULT);
} else if (ap_test_bit(&ap_dev->functions, AP_FUNC_COPRO)) {
zdev = zcrypt_device_alloc(CEX4C_MAX_MESSAGE_SIZE);
if (!zdev)
return -ENOMEM;
- zdev->type_string = "CEX4C";
+ if (ap_dev->device_type == AP_DEVICE_TYPE_CEX4) {
+ zdev->type_string = "CEX4C";
+ zdev->speed_rating = CEX4C_SPEED_RATING;
+ } else {
+ zdev->type_string = "CEX5C";
+ zdev->speed_rating = CEX5C_SPEED_RATING;
+ }
zdev->user_space_type = ZCRYPT_CEX3C;
zdev->min_mod_size = CEX4C_MIN_MOD_SIZE;
zdev->max_mod_size = CEX4C_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
zdev->short_crt = 0;
- zdev->speed_rating = CEX4C_SPEED_RATING;
zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
MSGTYPE06_VARIANT_DEFAULT);
} else if (ap_test_bit(&ap_dev->functions, AP_FUNC_EP11)) {
zdev = zcrypt_device_alloc(CEX4C_MAX_MESSAGE_SIZE);
if (!zdev)
return -ENOMEM;
- zdev->type_string = "CEX4P";
+ if (ap_dev->device_type == AP_DEVICE_TYPE_CEX4) {
+ zdev->type_string = "CEX4P";
+ zdev->speed_rating = CEX4P_SPEED_RATING;
+ } else {
+ zdev->type_string = "CEX5P";
+ zdev->speed_rating = CEX5P_SPEED_RATING;
+ }
zdev->user_space_type = ZCRYPT_CEX4;
zdev->min_mod_size = CEX4C_MIN_MOD_SIZE;
zdev->max_mod_size = CEX4C_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
zdev->short_crt = 0;
- zdev->speed_rating = CEX4C_SPEED_RATING;
zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
MSGTYPE06_VARIANT_EP11);
}
/*
- * hvc_iucv.c - z/VM IUCV hypervisor console (HVC) device driver
+ * z/VM IUCV hypervisor console (HVC) device driver
*
* This HVC device driver provides terminal access using
* z/VM IUCV communication paths.
*
- * Copyright IBM Corp. 2008, 2009
+ * Copyright IBM Corp. 2008, 2013
*
* Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
*/
#define IUCV_HVC_CON_IDX (0)
/* List of z/VM user ID filter entries (struct iucv_vmid_filter) */
#define MAX_VMID_FILTER (500)
+#define FILTER_WILDCARD_CHAR '*'
static size_t hvc_iucv_filter_size;
static void *hvc_iucv_filter;
static const char *hvc_iucv_filter_string;
* hvc_iucv_filter_connreq() - Filter connection request based on z/VM user ID
* @ipvmid: Originating z/VM user ID (right padded with blanks)
*
- * Returns 0 if the z/VM user ID @ipvmid is allowed to connection, otherwise
- * non-zero.
+ * Returns 0 if the z/VM user ID that is specified with @ipvmid is permitted to
+ * connect, otherwise non-zero.
*/
static int hvc_iucv_filter_connreq(u8 ipvmid[8])
{
- size_t i;
+ const char *wildcard, *filter_entry;
+ size_t i, len;
/* Note: default policy is ACCEPT if no filter is set */
if (!hvc_iucv_filter_size)
return 0;
- for (i = 0; i < hvc_iucv_filter_size; i++)
- if (0 == memcmp(ipvmid, hvc_iucv_filter + (8 * i), 8))
+ for (i = 0; i < hvc_iucv_filter_size; i++) {
+ filter_entry = hvc_iucv_filter + (8 * i);
+
+ /* If a filter entry contains the filter wildcard character,
+ * reduce the length to match the leading portion of the user
+ * ID only (wildcard match). Characters following the wildcard
+ * are ignored.
+ */
+ wildcard = strnchr(filter_entry, 8, FILTER_WILDCARD_CHAR);
+ len = (wildcard) ? wildcard - filter_entry : 8;
+ if (0 == memcmp(ipvmid, filter_entry, len))
return 0;
+ }
return 1;
}
/**
* hvc_iucv_parse_filter() - Parse filter for a single z/VM user ID
* @filter: String containing a comma-separated list of z/VM user IDs
+ * @dest: Location where to store the parsed z/VM user ID
*/
static const char *hvc_iucv_parse_filter(const char *filter, char *dest)
{
if (filter[len - 1] == '\n')
len--;
+ /* prohibit filter entries containing the wildcard character only */
+ if (len == 1 && *filter == FILTER_WILDCARD_CHAR)
+ return ERR_PTR(-EINVAL);
+
if (len > 8)
return ERR_PTR(-EINVAL);
#include <linux/compiler-gcc.h>
#endif
+#ifdef CC_USING_HOTPATCH
+#define notrace __attribute__((hotpatch(0,0)))
+#else
#define notrace __attribute__((no_instrument_function))
+#endif
/* Intel compiler defines __GNUC__. So we will overwrite implementations
* coming from above header files here
ifdef CONFIG_FUNCTION_TRACER
# Do not trace debug files and internal ftrace files
-CFLAGS_REMOVE_cgroup-debug.o = -pg
-CFLAGS_REMOVE_irq_work.o = -pg
+CFLAGS_REMOVE_cgroup-debug.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE)
endif
# cond_syscall is currently not LTO compatible
ifdef CONFIG_FUNCTION_TRACER
-CFLAGS_REMOVE_core.o = -pg
+CFLAGS_REMOVE_core.o = $(CC_FLAGS_FTRACE)
endif
obj-y := core.o ring_buffer.o callchain.o
obj-y += mutex.o semaphore.o rwsem.o
ifdef CONFIG_FUNCTION_TRACER
-CFLAGS_REMOVE_lockdep.o = -pg
-CFLAGS_REMOVE_lockdep_proc.o = -pg
-CFLAGS_REMOVE_mutex-debug.o = -pg
-CFLAGS_REMOVE_rtmutex-debug.o = -pg
+CFLAGS_REMOVE_lockdep.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_lockdep_proc.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_mutex-debug.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_rtmutex-debug.o = $(CC_FLAGS_FTRACE)
endif
obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o
ifdef CONFIG_FUNCTION_TRACER
-CFLAGS_REMOVE_clock.o = -pg
+CFLAGS_REMOVE_clock.o = $(CC_FLAGS_FTRACE)
endif
ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
ifdef CONFIG_FUNCTION_TRACER
ORIG_CFLAGS := $(KBUILD_CFLAGS)
-KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
+KBUILD_CFLAGS = $(subst $(CC_FLAGS_FTRACE),,$(ORIG_CFLAGS))
ifdef CONFIG_FTRACE_SELFTEST
# selftest needs instrumentation
-CFLAGS_trace_selftest_dynamic.o = -pg
+CFLAGS_trace_selftest_dynamic.o = $(CC_FLAGS_FTRACE)
obj-y += trace_selftest_dynamic.o
endif
endif
ifdef CONFIG_FUNCTION_TRACER
ORIG_CFLAGS := $(KBUILD_CFLAGS)
-KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
+KBUILD_CFLAGS = $(subst $(CC_FLAGS_FTRACE),,$(ORIG_CFLAGS))
endif
lib-y := ctype.o string.o vsprintf.o cmdline.o \
"$(if $(part-of-module),1,0)" "$(@)";
recordmcount_source := $(srctree)/scripts/recordmcount.pl
endif
-cmd_record_mcount = \
- if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \
+cmd_record_mcount = \
+ if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
+ "$(CC_FLAGS_FTRACE)" ]; then \
$(sub_cmd_record_mcount) \
fi;
endif
$cc .= " -m32";
} elsif ($arch eq "s390" && $bits == 64) {
- $mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*R_390_(PC|PLT)32DBL\\s+_mcount\\+0x2\$";
- $mcount_adjust = -14;
+ if ($cc =~ /-DCC_USING_HOTPATCH/) {
+ $mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*c0 04 00 00 00 00\\s*brcl\\s*0,[0-9a-f]+ <([^\+]*)>\$";
+ $mcount_adjust = 0;
+ } else {
+ $mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*R_390_(PC|PLT)32DBL\\s+_mcount\\+0x2\$";
+ $mcount_adjust = -14;
+ }
$alignment = 8;
$type = ".quad";
$ld .= " -m elf64_s390";
projects / linux-2.6-block.git / commitdiff