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| author | Anshuman Khandual <khandual@linux.vnet.ibm.com> | 2013-04-25 20:54:55 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-05-02 00:35:15 (GMT) |
| commit | 53b56ca0195b8a2a098a358088ecfefafb030b40 (patch) | |
| tree | 7709056b3f79dbd4e6ad37254e9bc30e83c057eb | |
| parent | fc2a6cfe05a33891180a27d55983febe170bc0f8 (diff) | |
| download | linux-53b56ca0195b8a2a098a358088ecfefafb030b40.tar.xz | |
powerpc: Setup BHRB instructions facility in HFSCR for POWER8
Make BHRB instructions available in problem and privileged states.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/cpu_setup_power.S | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 5c6fbe2..178a858 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -272,6 +272,7 @@ #define HFSCR_TAR (1 << (63-55)) /* Enable Target Address Register */ #define HFSCR_TM (1 << (63-58)) /* Enable Transactional Memory */ #define HFSCR_PM (1 << (63-60)) /* Enable prob/priv access to PMU SPRs */ +#define HFSCR_BHRB (1 << (63-59)) /* Enable Branch History Rolling Buffer*/ #define HFSCR_DSCR (1 << (63-61)) /* Enable Data Stream Control Register */ #define HFSCR_VECVSX (1 << (63-62)) /* Enable VMX/VSX */ #define HFSCR_FP (1 << (63-63)) /* Enable Floating Point */ diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S index e0c419b..7b4db96 100644 --- a/arch/powerpc/kernel/cpu_setup_power.S +++ b/arch/powerpc/kernel/cpu_setup_power.S @@ -129,7 +129,8 @@ __init_FSCR: __init_HFSCR: mfspr r3,SPRN_HFSCR - ori r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_PM + ori r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_BHRB|HFSCR_PM|\ + HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP mtspr SPRN_HFSCR,r3 blr |