From 9353374b8e1585d5fa47a1e5c1d3e9155dd0eb7c Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 30 Apr 2013 20:17:04 +0000 Subject: [PATCH] powerpc: Context switch the new EBB SPRs This context switches the new Event Based Branching (EBB) SPRs. The three new SPRs are: - Event Based Branch Handler Register (EBBHR) - Event Based Branch Return Register (EBBRR) - Branch Event Status and Control Register (BESCR) Signed-off-by: Michael Ellerman Signed-off-by: Matt Evans Signed-off-by: Michael Neuling Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/processor.h | 3 +++ arch/powerpc/include/asm/reg.h | 3 +++ arch/powerpc/kernel/asm-offsets.c | 3 +++ arch/powerpc/kernel/entry_64.S | 16 ++++++++++++++++ 4 files changed, 25 insertions(+) diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 0a4cc5d649e1..d7e67ca8b4a6 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -281,6 +281,9 @@ struct thread_struct { #endif #ifdef CONFIG_PPC_BOOK3S_64 unsigned long tar; + unsigned long ebbrr; + unsigned long ebbhr; + unsigned long bescr; #endif }; diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 93be5fb20394..3d17427e4fd7 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -663,6 +663,9 @@ #define SPRN_MMCRH 316 /* Hypervisor monitor mode control register */ #define SPRN_MMCRS 894 /* Supervisor monitor mode control register */ #define SPRN_MMCRC 851 /* Core monitor mode control register */ +#define SPRN_EBBHR 804 /* Event based branch handler register */ +#define SPRN_EBBRR 805 /* Event based branch return register */ +#define SPRN_BESCR 806 /* Branch event status and control register */ #define SPRN_PMC1 787 #define SPRN_PMC2 788 diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index b6c17ec9b169..172233eab799 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -124,6 +124,9 @@ int main(void) #ifdef CONFIG_PPC_BOOK3S_64 DEFINE(THREAD_TAR, offsetof(struct thread_struct, tar)); + DEFINE(THREAD_BESCR, offsetof(struct thread_struct, bescr)); + DEFINE(THREAD_EBBHR, offsetof(struct thread_struct, ebbhr)); + DEFINE(THREAD_EBBRR, offsetof(struct thread_struct, ebbrr)); #endif #ifdef CONFIG_PPC_TRANSACTIONAL_MEM DEFINE(PACATMSCRATCH, offsetof(struct paca_struct, tm_scratch)); diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 7a6801faaa83..3fe5259e2fea 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -458,6 +458,14 @@ BEGIN_FTR_SECTION */ mfspr r0,SPRN_TAR std r0,THREAD_TAR(r3) + + /* Event based branch registers */ + mfspr r0, SPRN_BESCR + std r0, THREAD_BESCR(r3) + mfspr r0, SPRN_EBBHR + std r0, THREAD_EBBHR(r3) + mfspr r0, SPRN_EBBRR + std r0, THREAD_EBBRR(r3) END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) #endif @@ -545,6 +553,14 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_1T_SEGMENT) #ifdef CONFIG_PPC_BOOK3S_64 BEGIN_FTR_SECTION + /* Event based branch registers */ + ld r0, THREAD_BESCR(r4) + mtspr SPRN_BESCR, r0 + ld r0, THREAD_EBBHR(r4) + mtspr SPRN_EBBHR, r0 + ld r0, THREAD_EBBRR(r4) + mtspr SPRN_EBBRR, r0 + ld r0,THREAD_TAR(r4) mtspr SPRN_TAR,r0 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) -- 2.39.5