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| author | Diana Craciun <diana.craciun@nxp.com> | 2018-07-28 02:06:37 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-08-07 17:32:24 +0300 |
| commit | ebcd1bfc33c7a90df941df68a6e5d4018c022fba (patch) | |
| tree | 55128a08e7c84290d2e187f7c79d66743c7cc5ea /arch/powerpc/include | |
| parent | 406d2b6ae3420f5bb2b3db6986dc6f0b6dbb637b (diff) | |
| download | linux-ebcd1bfc33c7a90df941df68a6e5d4018c022fba.tar.xz | |
powerpc/fsl: Add barrier_nospec implementation for NXP PowerPC Book3E
Implement the barrier_nospec as a isync;sync instruction sequence.
The implementation uses the infrastructure built for BOOK3S 64.
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
[mpe: Split out of larger patch]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/barrier.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h index cdc6960506e2..fbe8df433019 100644 --- a/arch/powerpc/include/asm/barrier.h +++ b/arch/powerpc/include/asm/barrier.h @@ -78,12 +78,18 @@ do { \ ___p1; \ }) +#ifdef CONFIG_PPC_BOOK3S_64 +#define NOSPEC_BARRIER_SLOT nop +#elif defined(CONFIG_PPC_FSL_BOOK3E) +#define NOSPEC_BARRIER_SLOT nop; nop +#endif + #ifdef CONFIG_PPC_BARRIER_NOSPEC /* * Prevent execution of subsequent instructions until preceding branches have * been fully resolved and are no longer executing speculatively. */ -#define barrier_nospec_asm NOSPEC_BARRIER_FIXUP_SECTION; nop +#define barrier_nospec_asm NOSPEC_BARRIER_FIXUP_SECTION; NOSPEC_BARRIER_SLOT // This also acts as a compiler barrier due to the memory clobber. #define barrier_nospec() asm (stringify_in_c(barrier_nospec_asm) ::: "memory") |