From 53b56ca0195b8a2a098a358088ecfefafb030b40 Mon Sep 17 00:00:00 2001 From: Anshuman Khandual Date: Thu, 25 Apr 2013 20:54:55 +0000 Subject: [PATCH] powerpc: Setup BHRB instructions facility in HFSCR for POWER8 Make BHRB instructions available in problem and privileged states. Signed-off-by: Anshuman Khandual Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/reg.h | 1 + arch/powerpc/kernel/cpu_setup_power.S | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 5c6fbe2c5ce..178a8584446 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 e0c419b8d65..7b4db965b59 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 -- 2.41.0