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| author | Michael Ellerman <michael@ellerman.id.au> | 2013-04-30 20:17:04 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-05-02 00:37:36 (GMT) |
| commit | 9353374b8e1585d5fa47a1e5c1d3e9155dd0eb7c (patch) | |
| tree | e6fdfc6f3a7aa57214fb481d965ab4378f2fbc7c /arch | |
| parent | 1ddf499e1a49e67c02b89e6565d091a0bda29a91 (diff) | |
| download | linux-9353374b8e1585d5fa47a1e5c1d3e9155dd0eb7c.tar.xz | |
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 <michael@ellerman.id.au>
Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 16 |
4 files changed, 25 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 0a4cc5d..d7e67ca 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 93be5fb..3d17427 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 b6c17ec..172233e 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 7a6801f..3fe5259 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) |