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| author | chenhui zhao <chenhui.zhao@freescale.com> | 2015-12-24 08:39:57 +0800 |
|---|---|---|
| committer | Scott Wood <oss@buserror.net> | 2016-03-04 23:44:02 -0600 |
| commit | ebb9d30a6a74f4ced5b7d35446ebb6362a724393 (patch) | |
| tree | 2efd7b3e75538b5550e273116adbba546fb859f4 /arch/powerpc/include | |
| parent | d64716caf7724dbacd6d79249b90973bf6a9852a (diff) | |
| download | linux-ebb9d30a6a74f4ced5b7d35446ebb6362a724393.tar.gz linux-ebb9d30a6a74f4ced5b7d35446ebb6362a724393.tar.bz2 linux-ebb9d30a6a74f4ced5b7d35446ebb6362a724393.zip | |
powerpc/mm: any thread in one core can be the first to setup TLB1
On e6500, in the case of cpu hotplug, either thread in one core
may be the first thread initilzing the TLB1. The subsequent threads
must not setup it again.
The code is derived from the comment of Scott Wood.
Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/cputhreads.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/cputhreads.h b/arch/powerpc/include/asm/cputhreads.h index ba42e46ea58e..ea9623147b87 100644 --- a/arch/powerpc/include/asm/cputhreads.h +++ b/arch/powerpc/include/asm/cputhreads.h @@ -94,6 +94,14 @@ static inline int cpu_last_thread_sibling(int cpu) return cpu | (threads_per_core - 1); } +static inline u32 get_tensr(void) +{ +#ifdef CONFIG_BOOKE + if (cpu_has_feature(CPU_FTR_SMT)) + return mfspr(SPRN_TENSR); +#endif + return 1; +} #endif /* _ASM_POWERPC_CPUTHREADS_H */ |