linux/arch/riscv
Andy Chiu 74eb70ce67 riscv: stacktrace: convert arch_stack_walk() to noinstr
[ Upstream commit 23b2188920 ]

arch_stack_walk() is called intensively in function_graph when the
kernel is compiled with CONFIG_TRACE_IRQFLAGS. As a result, the kernel
logs a lot of arch_stack_walk and its sub-functions into the ftrace
buffer. However, these functions should not appear on the trace log
because they are part of the ftrace itself. This patch references what
arm64 does for the smae function. So it further prevent the re-enter
kprobe issue, which is also possible on riscv.

Related-to: commit 0fbcd8abf3 ("arm64: Prohibit instrumentation on arch_stack_walk()")
Fixes: 680341382d ("riscv: add CALLER_ADDRx support")
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240613-dev-andyc-dyn-ftrace-v4-v1-1-1a538e12c01e@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-07-05 09:33:53 +02:00
..
boot riscv: dts: starfive: Remove PMIC interrupt info for Visionfive 2 board 2024-06-16 13:47:45 +02:00
configs Kbuild updates for v6.6 2023-09-05 11:01:47 -07:00
errata riscv: errata: andes: Probe for IOCP only once in boot stage 2023-12-13 18:45:19 +01:00
include RISC-V: fix vector insn load/store width mask 2024-07-05 09:33:53 +02:00
kernel riscv: stacktrace: convert arch_stack_walk() to noinstr 2024-07-05 09:33:53 +02:00
kvm RISC-V: KVM: Fix incorrect reg_subtype labels in kvm_riscv_vcpu_set_reg_isa_ext function 2024-06-21 14:38:14 +02:00
lib riscv: uaccess: Return the number of bytes effectively not copied 2023-08-16 07:30:06 -07:00
mm riscv: force PAGE_SIZE linear mapping if debug_pagealloc is enabled 2024-06-27 13:49:15 +02:00
net riscv, bpf: make some atomic operations fully ordered 2024-06-12 11:11:54 +02:00
purgatory riscv/purgatory: Disable CFI 2023-08-23 14:16:40 -07:00
tools riscv: Check relocations at compile time 2023-04-19 07:46:32 -07:00
Kbuild kexec: rename ARCH_HAS_KEXEC_PURGATORY 2023-08-18 10:18:54 -07:00
Kconfig RISC-V: Drop invalid test from CONFIG_AS_HAS_OPTION_ARCH 2024-03-06 14:48:41 +00:00
Kconfig.debug
Kconfig.errata riscv: only select DMA_DIRECT_REMAP from RISCV_ISA_ZICBOM and ERRATA_THEAD_PBMT 2023-10-26 09:42:38 +02:00
Kconfig.socs riscv: Kconfig: Add select ARM_AMBA to SOC_STARFIVE 2023-12-13 18:45:35 +01:00
Makefile kbuild: unify vdso_install rules 2024-06-12 11:12:32 +02:00
Makefile.postlink riscv: Use --emit-relocs in order to move .rela.dyn in init 2023-04-19 07:46:33 -07:00