Merge patch series "RISC-V kasan rework"

Alexandre Ghiti <alexghiti@rivosinc.com> says:

As described in patch 2, our current kasan implementation is intricate,
so I tried to simplify the implementation and mimic what arm64/x86 are
doing.

In addition it fixes UEFI bootflow with a kasan kernel and kasan inline
instrumentation: all kasan configurations were tested on a large ubuntu
kernel with success with KASAN_KUNIT_TEST and KASAN_MODULE_TEST.

inline ubuntu config + uefi:
 sv39: OK
 sv48: OK
 sv57: OK

outline ubuntu config + uefi:
 sv39: OK
 sv48: OK
 sv57: OK

Actually 1 test always fails with KASAN_KUNIT_TEST that I have to check:
KASAN failure expected in "set_bit(nr, addr)", but none occurrred

Note that Palmer recently proposed to remove COMMAND_LINE_SIZE from the
userspace abi
https://lore.kernel.org/lkml/20221211061358.28035-1-palmer@rivosinc.com/T/
so that we can finally increase the command line to fit all kasan kernel
parameters.

All of this should hopefully fix the syzkaller riscv build that has been
failing for a few months now, any test is appreciated and if I can help
in any way, please ask.

* b4-shazam-merge:
  riscv: Unconditionnally select KASAN_VMALLOC if KASAN
  riscv: Fix ptdump when KASAN is enabled
  riscv: Fix EFI stub usage of KASAN instrumented strcmp function
  riscv: Move DTB_EARLY_BASE_VA to the kernel address space
  riscv: Rework kasan population functions
  riscv: Split early and final KASAN population functions

Link: https://lore.kernel.org/r/20230203075232.274282-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

diff --cc arch/riscv/Kconfig
index ba94d08a7d0ef3cc9dbcf4f22fb749d60e7e4f2b,0f226d3261caa65e5ec8515469f80353dc452f11..716e9480495dc8294bf03c2835257c7690be8b65
--- 1/arch/riscv/Kconfig
--- 2/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@@ -115,11 -111,13 +115,12 @@@ config RISC
        select HAVE_PERF_USER_STACK_DUMP
        select HAVE_POSIX_CPU_TIMERS_TASK_WORK
        select HAVE_REGS_AND_STACK_ACCESS_API
 -      select HAVE_FUNCTION_ARG_ACCESS_API
 +      select HAVE_RSEQ
        select HAVE_STACKPROTECTOR
        select HAVE_SYSCALL_TRACEPOINTS
 -      select HAVE_RSEQ
        select IRQ_DOMAIN
        select IRQ_FORCED_THREADING
+       select KASAN_VMALLOC if KASAN
        select MODULES_USE_ELF_RELA if MODULES
        select MODULE_SECTIONS if MODULES
        select OF

diff --cc arch/riscv/mm/init.c
Simple merge