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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-08-23 08:24:21 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-08-26 21:21:07 +1000 |
| commit | 806c0e6e7e97adc17389c8dc1f52d4736f49299b (patch) | |
| tree | 87b731a92cd76db6d972cd5a3908043c88419dca /arch/powerpc/include/asm/ptrace.h | |
| parent | 133c17a1788d68c9fff59d5f724a4ba14647a16d (diff) | |
| download | linux-next-806c0e6e7e97adc17389c8dc1f52d4736f49299b.tar.gz | |
powerpc: Refactor verification of MSR_RI
40x and BOOKE don't have MSR_RI therefore all tests involving
MSR_RI may be problematic on those plateforms.
Create helpers to check or set MSR_RI in regs, and use them
in common code.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c2fb93708196734f4176dda334aaa3055f213b89.1629707037.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/include/asm/ptrace.h')
| -rw-r--r-- | arch/powerpc/include/asm/ptrace.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h index 5114ddba6f16..f9c235c1d6ce 100644 --- a/arch/powerpc/include/asm/ptrace.h +++ b/arch/powerpc/include/asm/ptrace.h @@ -22,6 +22,7 @@ #include <linux/err.h> #include <uapi/asm/ptrace.h> #include <asm/asm-const.h> +#include <asm/reg.h> #ifndef __ASSEMBLY__ struct pt_regs @@ -272,6 +273,28 @@ static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc) regs->gpr[3] = rc; } +static inline bool cpu_has_msr_ri(void) +{ + return !IS_ENABLED(CONFIG_BOOKE) && !IS_ENABLED(CONFIG_40x); +} + +static inline bool regs_is_unrecoverable(struct pt_regs *regs) +{ + return unlikely(cpu_has_msr_ri() && !(regs->msr & MSR_RI)); +} + +static inline void regs_set_recoverable(struct pt_regs *regs) +{ + if (cpu_has_msr_ri()) + regs_set_return_msr(regs, regs->msr | MSR_RI); +} + +static inline void regs_set_unrecoverable(struct pt_regs *regs) +{ + if (cpu_has_msr_ri()) + regs_set_return_msr(regs, regs->msr & ~MSR_RI); +} + #define arch_has_single_step() (1) #define arch_has_block_step() (true) #define ARCH_HAS_USER_SINGLE_STEP_REPORT |