linux-toradex.git/arch/riscv/kernel/probes, branch master

riscv: fix various typos in comments and code

2026-04-05T00:42:39+00:00

Fix various typos in RISC-V architecture code and comments.
The following changes are included:

- arch/riscv/errata/thead/errata.c: "futher" → "further"
- arch/riscv/include/asm/atomic.h: "therefor" → "therefore", "arithmatic" → "arithmetic"
- arch/riscv/include/asm/elf.h: "availiable" → "available", "coorespends" → "corresponds"
- arch/riscv/include/asm/processor.h: "requries" → "is required"
- arch/riscv/include/asm/thread_info.h: "returing" → "returning"
- arch/riscv/kernel/acpi.c: "compliancy" → "compliance"
- arch/riscv/kernel/ftrace.c: "therefor" → "therefore"
- arch/riscv/kernel/head.S: "intruction" → "instruction"
- arch/riscv/kernel/mcount-dyn.S: "localtion → "location"
- arch/riscv/kernel/module-sections.c: "maxinum" → "maximum"
- arch/riscv/kernel/probes/kprobes.c: "reenabled" → "re-enabled"
- arch/riscv/kernel/probes/uprobes.c: "probbed" → "probed"
- arch/riscv/kernel/soc.c: "extremly" → "extremely"
- arch/riscv/kernel/suspend.c: "incosistent" → "inconsistent"
- arch/riscv/kvm/tlb.c: "cahce" → "cache"
- arch/riscv/kvm/vcpu_pmu.c: "indicies" → "indices"
- arch/riscv/lib/csum.c: "implmentations" → "implementations"
- arch/riscv/lib/memmove.S: "ammount" → "amount"
- arch/riscv/mm/cacheflush.c: "visable" → "visible"
- arch/riscv/mm/physaddr.c: "aginst" → "against"

Signed-off-by: Sean Chang 
Acked-by: Conor Dooley 
Link: https://patch.msgid.link/20260212163325.60389-1-seanwascoding@gmail.com
Signed-off-by: Paul Walmsley

riscv/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()

2026-01-06T15:34:27+00:00

Replace deprecated kmap_atomic() with kmap_local_page().

Signed-off-by: Keke Ming 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Oleg Nesterov 
Link: https://patch.msgid.link/20260103084243.195125-2-ming.jvle@gmail.com

riscv: kprobes: Fix probe address validation

2025-10-10T01:36:45+00:00

When adding a kprobe such as "p:probe/tcp_sendmsg _text+15392192",
arch_check_kprobe would start iterating all instructions starting from
_text until the probed address. Not only is this very inefficient, but
literal values in there (e.g. left by function patching) are
misinterpreted in a way that causes a desync.

Fix this by doing it like x86: start the iteration at the closest
preceding symbol instead of the given starting point.

Fixes: 87f48c7ccc73 ("riscv: kprobe: Fixup kernel panic when probing an illegal position")
Signed-off-by: Fabian Vogt 
Signed-off-by: Marvin Friedrich 
Acked-by: Guo Ren 
Link: https://lore.kernel.org/r/6191817.lOV4Wx5bFT@fvogt-thinkpad
Signed-off-by: Paul Walmsley

riscv: kprobes: Remove duplication of RV_EXTRACT_ITYPE_IMM

2025-09-17T00:46:44+00:00

Use RV_EXTRACT_ITYPE_IMM, instead of re-implementing it in simulate_jalr().

Signed-off-by: Nam Cao 
Reviewed-by: Alexandre Ghiti 
Link: https://lore.kernel.org/linux-riscv/8ae34e966c312ae5cf6c09a35ddc290cce942208.1747215274.git.namcao@linutronix.de/
Signed-off-by: Paul Walmsley

riscv: kprobes: Remove duplication of RV_EXTRACT_UTYPE_IMM

2025-09-17T00:46:44+00:00

Use RV_EXTRACT_UTYPE_IMM, instead of reimplementing it in simulate_auipc().

Signed-off-by: Nam Cao 
Reviewed-by: Alexandre Ghiti 
Link: https://lore.kernel.org/linux-riscv/8f0defce9f1f23f1b44bb9750ed083cfc124213c.1747215274.git.namcao@linutronix.de/
Signed-off-by: Paul Walmsley

riscv: kprobes: Remove duplication of RV_EXTRACT_RD_REG

2025-09-17T00:46:44+00:00

Use RV_EXTRACT_RD_REG, instead of reimplementing its code.

Signed-off-by: Nam Cao 
Reviewed-by: Alexandre Ghiti 
Link: https://lore.kernel.org/linux-riscv/b31e5b41df5839a76103348e54dc034c8a43447a.1747215274.git.namcao@linutronix.de/
Signed-off-by: Paul Walmsley

riscv: kprobes: Remove duplication of RVC_EXTRACT_BTYPE_IMM

2025-09-17T00:46:44+00:00

Use RVC_EXTRACT_BTYPE_IMM, instead of reimplementing it in
simulate_c_bnez_beqz().

Signed-off-by: Nam Cao 
Reviewed-by: Alexandre Ghiti 
Link: https://lore.kernel.org/linux-riscv/8a8ed970f279fa5f24c90d840c2130e37bc6d16e.1747215274.git.namcao@linutronix.de/
Signed-off-by: Paul Walmsley

riscv: kprobes: Remove duplication of RVC_EXTRACT_C2_RS1_REG

2025-09-17T00:46:44+00:00

Use RVC_EXTRACT_C2_RS1_REG, instead of reimplementing it in
simulate_c_jr_jalr().

Signed-off-by: Nam Cao 
Reviewed-by: Alexandre Ghiti 
Link: https://lore.kernel.org/linux-riscv/d56955cd683411c6d2f63d13c78e0572462a3269.1747215274.git.namcao@linutronix.de/
Signed-off-by: Paul Walmsley

riscv: kprobes: Remove duplication of RVC_EXTRACT_JTYPE_IMM

2025-09-17T00:46:44+00:00

Use RVC_EXTRACT_JTYPE_IMM, instead of reimplementing it in simulate_c_j().

Signed-off-by: Nam Cao 
Reviewed-by: Alexandre Ghiti 
Link: https://lore.kernel.org/linux-riscv/24497deaab06d6b12cb84923606ec26f67e25424.1747215274.git.namcao@linutronix.de/
[pjw@kernel.org: fixed subject line typo]
Signed-off-by: Paul Walmsley

riscv: kprobes: Remove duplication of RV_EXTRACT_BTYPE_IMM

2025-09-17T00:46:44+00:00

Use RV_EXTRACT_BTYPE_IMM, instead of reimplementing it in
simulate_branch().

Signed-off-by: Nam Cao 
Reviewed-by: Alexandre Ghiti 
Link: https://lore.kernel.org/linux-riscv/b441038c991da11a7a48ea7140ab00e3bb119387.1747215274.git.namcao@linutronix.de/
Signed-off-by: Paul Walmsley