diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-02-09 22:29:27 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-02-11 15:35:12 +0300 |
| commit | b966f2279048ee9f30d83ef8568b99fa40917c54 (patch) | |
| tree | b824737af6a6743238ad51b162d3663ff05074a4 /arch/powerpc/include | |
| parent | eb595eca74067b78d36fb188b555e30f28686fc7 (diff) | |
| download | linux-b966f2279048ee9f30d83ef8568b99fa40917c54.tar.xz | |
powerpc/syscall: Do not check unsupported scv vector on PPC32
Only book3s/64 has scv. No need to check the 0x7ff0 trap on 32 or 64e.
For that, add a helper trap_is_unsupported_scv() similar to
trap_is_scv().
And ignore the scv parameter in syscall_exit_prepare (Save 14 cycles
346 => 332 cycles)
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/fb87b205ae8eb8c623f33bb316801acf95a831e6.1612898425.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/ptrace.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h index 58f9dc060a7b..c6b91e5c2701 100644 --- a/arch/powerpc/include/asm/ptrace.h +++ b/arch/powerpc/include/asm/ptrace.h @@ -229,6 +229,11 @@ static inline bool trap_is_scv(struct pt_regs *regs) return (IS_ENABLED(CONFIG_PPC_BOOK3S_64) && TRAP(regs) == 0x3000); } +static inline bool trap_is_unsupported_scv(struct pt_regs *regs) +{ + return IS_ENABLED(CONFIG_PPC_BOOK3S_64) && TRAP(regs) == 0x7ff0; +} + static inline bool trap_is_syscall(struct pt_regs *regs) { return (trap_is_scv(regs) || TRAP(regs) == 0xc00); |