diff options
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 915fbb4fc2fe..246b11c4fe7e 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -33,6 +33,7 @@ #include <asm/irqflags.h> #include <asm/ftrace.h> #include <asm/hw_irq.h> +#include <asm/context_tracking.h> /* * System calls. @@ -376,8 +377,6 @@ _GLOBAL(ret_from_fork) _GLOBAL(ret_from_kernel_thread) bl .schedule_tail REST_NVGPRS(r1) - li r3,0 - std r3,0(r1) ld r14, 0(r14) mtlr r14 mr r3,r15 @@ -466,6 +465,20 @@ BEGIN_FTR_SECTION std r0, THREAD_EBBHR(r3) mfspr r0, SPRN_EBBRR std r0, THREAD_EBBRR(r3) + + /* PMU registers made user read/(write) by EBB */ + mfspr r0, SPRN_SIAR + std r0, THREAD_SIAR(r3) + mfspr r0, SPRN_SDAR + std r0, THREAD_SDAR(r3) + mfspr r0, SPRN_SIER + std r0, THREAD_SIER(r3) + mfspr r0, SPRN_MMCR0 + std r0, THREAD_MMCR0(r3) + mfspr r0, SPRN_MMCR2 + std r0, THREAD_MMCR2(r3) + mfspr r0, SPRN_MMCRA + std r0, THREAD_MMCRA(r3) END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) #endif @@ -488,6 +501,13 @@ BEGIN_FTR_SECTION ldarx r6,0,r1 END_FTR_SECTION_IFSET(CPU_FTR_STCX_CHECKS_ADDRESS) +#ifdef CONFIG_PPC_BOOK3S +/* Cancel all explict user streams as they will have no use after context + * switch and will stop the HW from creating streams itself + */ + DCBT_STOP_ALL_STREAM_IDS(r6) +#endif + addi r6,r4,-THREAD /* Convert THREAD to 'current' */ std r6,PACACURRENT(r13) /* Set new 'current' */ @@ -561,6 +581,20 @@ BEGIN_FTR_SECTION ld r0, THREAD_EBBRR(r4) mtspr SPRN_EBBRR, r0 + /* PMU registers made user read/(write) by EBB */ + ld r0, THREAD_SIAR(r4) + mtspr SPRN_SIAR, r0 + ld r0, THREAD_SDAR(r4) + mtspr SPRN_SDAR, r0 + ld r0, THREAD_SIER(r4) + mtspr SPRN_SIER, r0 + ld r0, THREAD_MMCR0(r4) + mtspr SPRN_MMCR0, r0 + ld r0, THREAD_MMCR2(r4) + mtspr SPRN_MMCR2, r0 + ld r0, THREAD_MMCRA(r4) + mtspr SPRN_MMCRA, r0 + ld r0,THREAD_TAR(r4) mtspr SPRN_TAR,r0 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) @@ -634,7 +668,7 @@ _GLOBAL(ret_from_except_lite) andi. r0,r4,_TIF_NEED_RESCHED beq 1f bl .restore_interrupts - bl .schedule + SCHEDULE_USER b .ret_from_except_lite 1: bl .save_nvgprs |