5.15-stable review patch. If anyone has any objections, please let me know.
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From: Mark Rutland mark.rutland@arm.com
commit b3a0c010e900a9f89dcd99f10bd8f7538d21b0a9 upstream.
Currently do_sysinstr() and do_cp15instr() are marked with NOKPROBE_SYMBOL(). However, these are only called for exceptions taken from EL0, and there is no risk of recursion in kprobes, so this is not necessary.
Remove the NOKPROBE_SYMBOL() annotation, and rename the two functions to more clearly indicate that these are solely for exceptions taken from EL0, better matching the names used by the lower level entry points in entry-common.c.
Signed-off-by: Mark Rutland mark.rutland@arm.com Cc: Catalin Marinas catalin.marinas@arm.com Cc: James Morse james.morse@arm.com Cc: Joey Gouly joey.gouly@arm.com Cc: Peter Zijlstra peterz@infradead.org Cc: Will Deacon will@kernel.org Link: https://lore.kernel.org/r/20221019144123.612388-2-mark.rutland@arm.com Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm64/include/asm/exception.h | 4 ++-- arch/arm64/kernel/entry-common.c | 4 ++-- arch/arm64/kernel/traps.c | 6 ++---- 3 files changed, 6 insertions(+), 8 deletions(-)
--- a/arch/arm64/include/asm/exception.h +++ b/arch/arm64/include/asm/exception.h @@ -66,10 +66,10 @@ void do_debug_exception(unsigned long ad void do_fpsimd_acc(unsigned long esr, struct pt_regs *regs); void do_sve_acc(unsigned long esr, struct pt_regs *regs); void do_fpsimd_exc(unsigned long esr, struct pt_regs *regs); -void do_sysinstr(unsigned long esr, struct pt_regs *regs); +void do_el0_sys(unsigned long esr, struct pt_regs *regs); void do_sp_pc_abort(unsigned long addr, unsigned long esr, struct pt_regs *regs); void bad_el0_sync(struct pt_regs *regs, int reason, unsigned long esr); -void do_cp15instr(unsigned long esr, struct pt_regs *regs); +void do_el0_cp15(unsigned long esr, struct pt_regs *regs); void do_el0_svc(struct pt_regs *regs); void do_el0_svc_compat(struct pt_regs *regs); void do_el0_fpac(struct pt_regs *regs, unsigned long esr); --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -541,7 +541,7 @@ static void noinstr el0_sys(struct pt_re { enter_from_user_mode(regs); local_daif_restore(DAIF_PROCCTX); - do_sysinstr(esr, regs); + do_el0_sys(esr, regs); exit_to_user_mode(regs); }
@@ -728,7 +728,7 @@ static void noinstr el0_cp15(struct pt_r { enter_from_user_mode(regs); local_daif_restore(DAIF_PROCCTX); - do_cp15instr(esr, regs); + do_el0_cp15(esr, regs); exit_to_user_mode(regs); }
--- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -742,7 +742,7 @@ static const struct sys64_hook cp15_64_h {}, };
-void do_cp15instr(unsigned long esr, struct pt_regs *regs) +void do_el0_cp15(unsigned long esr, struct pt_regs *regs) { const struct sys64_hook *hook, *hook_base;
@@ -780,10 +780,9 @@ void do_cp15instr(unsigned long esr, str */ do_undefinstr(regs, esr); } -NOKPROBE_SYMBOL(do_cp15instr); #endif
-void do_sysinstr(unsigned long esr, struct pt_regs *regs) +void do_el0_sys(unsigned long esr, struct pt_regs *regs) { const struct sys64_hook *hook;
@@ -800,7 +799,6 @@ void do_sysinstr(unsigned long esr, stru */ do_undefinstr(regs, esr); } -NOKPROBE_SYMBOL(do_sysinstr);
static const char *esr_class_str[] = { [0 ... ESR_ELx_EC_MAX] = "UNRECOGNIZED EC",