``CAP_LAST_CAP`` from the kernel.
+.. _core_pattern:
+
core_pattern
============
%f executable filename
%E executable path
%c maximum size of core file by resource limit RLIMIT_CORE
+ %C CPU the task ran on
%<OTHER> both are dropped
======== ==========================================
On architectures where unaligned accesses cause traps, and where this
feature is supported (``CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN``;
- currently, ``arc`` and ``ia64``), controls whether all unaligned traps
- are logged.
+ currently, ``arc``, ``ia64`` and ``loongarch``), controls whether all
+ unaligned traps are logged.
= =============================================================
0 Log all unaligned accesses.
an oops event is detected.
+oops_limit
+==========
+
+Number of kernel oopses after which the kernel should panic when
+``panic_on_oops`` is not set. Setting this to 0 disables checking
+the count. Setting this to 1 has the same effect as setting
+``panic_on_oops=1``. The default value is 10000.
+
+
osrelease, ostype & version
===========================
watchdog — if enabled — can detect a hard lockup condition.
+split_lock_mitigate (x86 only)
+==============================
+
+On x86, each "split lock" imposes a system-wide performance penalty. On larger
+systems, large numbers of split locks from unprivileged users can result in
+denials of service to well-behaved and potentially more important users.
+
+The kernel mitigates these bad users by detecting split locks and imposing
+penalties: forcing them to wait and only allowing one core to execute split
+locks at a time.
+
+These mitigations can make those bad applications unbearably slow. Setting
+split_lock_mitigate=0 may restore some application performance, but will also
+increase system exposure to denial of service attacks from split lock users.
+
+= ===================================================================
+0 Disable the mitigation mode - just warns the split lock on kernel log
+ and exposes the system to denials of service from the split lockers.
+1 Enable the mitigation mode (this is the default) - penalizes the split
+ lockers with intentional performance degradation.
+= ===================================================================
+
+
stack_erasing
=============
On architectures where unaligned accesses cause traps, and where this
feature is supported (``CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW``; currently,
- ``arc`` and ``parisc``), controls whether unaligned traps are caught
- and emulated (instead of failing).
+ ``arc``, ``parisc`` and ``loongarch``), controls whether unaligned traps
+ are caught and emulated (instead of failing).
= ========================================================
0 Do not emulate unaligned accesses.
2 Unprivileged calls to ``bpf()`` are disabled
= =============================================================
+
+warn_limit
+==========
+
+Number of kernel warnings after which the kernel should panic when
+``panic_on_warn`` is not set. Setting this to 0 disables checking
+the warning count. Setting this to 1 has the same effect as setting
+``panic_on_warn=1``. The default value is 0.
+
+
watchdog
========
select ARCH_ENABLE_MEMORY_HOTPLUG
select ARCH_ENABLE_MEMORY_HOTREMOVE
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
+ select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_INLINE_READ_LOCK if !PREEMPTION
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
+ select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
select ARCH_WANT_LD_ORPHAN_WARN
select ARCH_WANTS_NO_INSTR
select BUILDTIME_TABLE_SORT
select COMMON_CLK
+ select CPU_PM
select EFI
select GENERIC_CLOCKEVENTS
select GENERIC_CMOS_UPDATE
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
select HAVE_ASM_MODVERSIONS
select HAVE_CONTEXT_TRACKING_USER
+ select HAVE_C_RECORDMCOUNT
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DMA_CONTIGUOUS
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_DYNAMIC_FTRACE_WITH_ARGS
+ select HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_EBPF_JIT
select HAVE_EXIT_THREAD
select HAVE_FAST_GUP
+ select HAVE_FTRACE_MCOUNT_RECORD
+ select HAVE_FUNCTION_GRAPH_TRACER
+ select HAVE_FUNCTION_TRACER
select HAVE_GENERIC_VDSO
select HAVE_IOREMAP_PROT
select HAVE_IRQ_EXIT_ON_IRQ_STACK
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RSEQ
select HAVE_SETUP_PER_CPU_AREA if NUMA
+ select HAVE_STACKPROTECTOR
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_TIF_NOHZ
select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP
select MODULES_USE_ELF_RELA if MODULES
select NEED_PER_CPU_EMBED_FIRST_CHUNK
select NEED_PER_CPU_PAGE_FIRST_CHUNK
+ select OF
+ select OF_EARLY_FLATTREE
select PCI
select PCI_DOMAINS_GENERIC
select PCI_ECAM if ACPI
select RTC_LIB
select SMP
select SPARSE_IRQ
+ select SYSCTL_ARCH_UNALIGN_ALLOW
+ select SYSCTL_ARCH_UNALIGN_NO_WARN
select SYSCTL_EXCEPTION_TRACE
select SWIOTLB
select TRACE_IRQFLAGS_SUPPORT
config ARCH_SPARSEMEM_ENABLE
def_bool y
+ select SPARSEMEM_VMEMMAP_ENABLE
help
Say Y to support efficient handling of sparse physical memory,
for architectures which are either NUMA (Non-Uniform Memory Access)
menu "Power management options"
+ config ARCH_SUSPEND_POSSIBLE
+ def_bool y
+
+ config ARCH_HIBERNATION_POSSIBLE
+ def_bool y
+
+ source "kernel/power/Kconfig"
source "drivers/acpi/Kconfig"
endmenu
void __init efi_init(void);
void __init efi_runtime_init(void);
+ void __init *efi_fdt_pointer(void);
void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
#define ARCH_EFI_IRQ_FLAGS_MASK 0x00000004 /* Bit 2: CSR.CRMD.IE */
#define EFI_ALLOC_ALIGN SZ_64K
#define EFI_RT_VIRTUAL_OFFSET CSR_DMW0_BASE
-static inline struct screen_info *alloc_screen_info(void)
+static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
{
- return &screen_info;
+ return ULONG_MAX;
}
-static inline void free_screen_info(struct screen_info *si)
+static inline unsigned long efi_get_kimg_min_align(void)
{
+ return SZ_2M;
}
-static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
-{
- return ULONG_MAX;
-}
+#define EFI_KIMG_PREFERRED_ADDRESS PHYSADDR(VMLINUX_LOAD_ADDRESS)
+
+unsigned long kernel_entry_address(void);
#endif /* _ASM_LOONGARCH_EFI_H */
static unsigned long efi_config_table;
static unsigned long __initdata boot_memmap = EFI_INVALID_TABLE_ADDR;
+ static unsigned long __initdata fdt_pointer = EFI_INVALID_TABLE_ADDR;
static efi_system_table_t *efi_systab;
static efi_config_table_type_t arch_tables[] __initdata = {
{LINUX_EFI_BOOT_MEMMAP_GUID, &boot_memmap, "MEMMAP" },
+ {DEVICE_TREE_GUID, &fdt_pointer, "FDTPTR" },
{},
};
+ void __init *efi_fdt_pointer(void)
+ {
+ if (!efi_systab)
+ return NULL;
+
+ if (fdt_pointer == EFI_INVALID_TABLE_ADDR)
+ return NULL;
+
+ return early_memremap_ro(fdt_pointer, SZ_64K);
+ }
+
void __init efi_runtime_init(void)
{
- if (!efi_enabled(EFI_BOOT))
+ if (!efi_enabled(EFI_BOOT) || !efi_systab->runtime)
return;
if (efi_runtime_disabled()) {
set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
}
+unsigned long __initdata screen_info_table = EFI_INVALID_TABLE_ADDR;
+
+static void __init init_screen_info(void)
+{
+ struct screen_info *si;
+
+ if (screen_info_table == EFI_INVALID_TABLE_ADDR)
+ return;
+
+ si = early_memremap(screen_info_table, sizeof(*si));
+ if (!si) {
+ pr_err("Could not map screen_info config table\n");
+ return;
+ }
+ screen_info = *si;
+ memset(si, 0, sizeof(*si));
+ early_memunmap(si, sizeof(*si));
+
+ memblock_reserve(screen_info.lfb_base, screen_info.lfb_size);
+}
+
void __init efi_init(void)
{
int size;
set_bit(EFI_CONFIG_TABLES, &efi.flags);
- if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI)
- memblock_reserve(screen_info.lfb_base, screen_info.lfb_size);
+ init_screen_info();
if (boot_memmap == EFI_INVALID_TABLE_ADDR)
return;
new = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
pgd_populate(&init_mm, pgd, new);
#ifndef __PAGETABLE_PUD_FOLDED
- pud_init((unsigned long)new, (unsigned long)invalid_pmd_table);
+ pud_init(new);
#endif
}
new = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
pud_populate(&init_mm, pud, new);
#ifndef __PAGETABLE_PMD_FOLDED
- pmd_init((unsigned long)new, (unsigned long)invalid_pte_table);
+ pmd_init(new);
#endif
}
}
}
+ /*
+ * fake_numa_init() - For Non-ACPI systems
+ * Return: 0 on success, -errno on failure.
+ */
+ static int __init fake_numa_init(void)
+ {
+ phys_addr_t start = memblock_start_of_DRAM();
+ phys_addr_t end = memblock_end_of_DRAM() - 1;
+
+ node_set(0, numa_nodes_parsed);
+ pr_info("Faking a node at [mem %pap-%pap]\n", &start, &end);
+
+ return numa_add_memblk(0, start, end + 1);
+ }
+
int __init init_numa_memory(void)
{
int i;
memset(&numa_meminfo, 0, sizeof(numa_meminfo));
/* Parse SRAT and SLIT if provided by firmware. */
- ret = acpi_numa_init();
+ ret = acpi_disabled ? fake_numa_init() : acpi_numa_init();
if (ret < 0)
return ret;
#include <asm/unwind.h>
#include <asm/vdso.h>
+ #ifdef CONFIG_STACKPROTECTOR
+ #include <linux/stackprotector.h>
+ unsigned long __stack_chk_guard __read_mostly;
+ EXPORT_SYMBOL(__stack_chk_guard);
+ #endif
+
/*
* Idle related variables and functions
*/
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
- sp -= prandom_u32_max(PAGE_SIZE);
+ sp -= get_random_u32_below(PAGE_SIZE);
return sp & STACK_ALIGN;
}
projects / linux-block.git / commitdiff