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| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-07-28 02:06:34 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-08-07 17:32:23 +0300 |
| commit | 179ab1cbf883575c3a585bcfc0f2160f1d22a149 (patch) | |
| tree | eead3ee74946fc0b174966ef4fcf1fa02ae8e2fc /arch/powerpc/include | |
| parent | 6453b532f2c8856a80381e6b9a1f5ea2f12294df (diff) | |
| download | linux-179ab1cbf883575c3a585bcfc0f2160f1d22a149.tar.xz | |
powerpc/64: Add CONFIG_PPC_BARRIER_NOSPEC
Add a config symbol to encode which platforms support the
barrier_nospec speculation barrier. Currently this is just Book3S 64
but we will add Book3E in a future patch.
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/barrier.h | 6 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/setup.h | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h index de1316874e45..cdc6960506e2 100644 --- a/arch/powerpc/include/asm/barrier.h +++ b/arch/powerpc/include/asm/barrier.h @@ -78,7 +78,7 @@ do { \ ___p1; \ }) -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_BARRIER_NOSPEC /* * Prevent execution of subsequent instructions until preceding branches have * been fully resolved and are no longer executing speculatively. @@ -88,10 +88,10 @@ do { \ // This also acts as a compiler barrier due to the memory clobber. #define barrier_nospec() asm (stringify_in_c(barrier_nospec_asm) ::: "memory") -#else /* !CONFIG_PPC_BOOK3S_64 */ +#else /* !CONFIG_PPC_BARRIER_NOSPEC */ #define barrier_nospec_asm #define barrier_nospec() -#endif +#endif /* CONFIG_PPC_BARRIER_NOSPEC */ #include <asm-generic/barrier.h> diff --git a/arch/powerpc/include/asm/setup.h b/arch/powerpc/include/asm/setup.h index 8721fd004291..8205f9fdfd67 100644 --- a/arch/powerpc/include/asm/setup.h +++ b/arch/powerpc/include/asm/setup.h @@ -56,7 +56,7 @@ void setup_barrier_nospec(void); void do_barrier_nospec_fixups(bool enable); extern bool barrier_nospec_enabled; -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_BARRIER_NOSPEC void do_barrier_nospec_fixups_range(bool enable, void *start, void *end); #else static inline void do_barrier_nospec_fixups_range(bool enable, void *start, void *end) { }; |