diff options
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 13 | ||||
| -rw-r--r-- | arch/powerpc/kernel/paca.c | 15 |
3 files changed, 29 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index ac0631958b2..2ef7ea86037 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -135,11 +135,13 @@ int main(void) DEFINE(PACA_STARTPURR, offsetof(struct paca_struct, startpurr)); DEFINE(PACA_USER_TIME, offsetof(struct paca_struct, user_time)); DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time)); + DEFINE(PACA_SLBSHADOWPTR, offsetof(struct paca_struct, slb_shadow_ptr)); DEFINE(LPPACASRR0, offsetof(struct lppaca, saved_srr0)); DEFINE(LPPACASRR1, offsetof(struct lppaca, saved_srr1)); DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int)); DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int)); + DEFINE(SLBSHADOW_SAVEAREA, offsetof(struct slb_shadow, save_area)); #endif /* CONFIG_PPC64 */ /* RTAS */ diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 54d9f5cdaab..5baea498ea6 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -323,6 +323,11 @@ _GLOBAL(ret_from_fork) * The code which creates the new task context is in 'copy_thread' * in arch/powerpc/kernel/process.c */ +#define SHADOW_SLB_BOLTED_STACK_ESID \ + (SLBSHADOW_SAVEAREA + 0x10*(SLB_NUM_BOLTED-1)) +#define SHADOW_SLB_BOLTED_STACK_VSID \ + (SLBSHADOW_SAVEAREA + 0x10*(SLB_NUM_BOLTED-1) + 8) + .align 7 _GLOBAL(_switch) mflr r0 @@ -375,6 +380,14 @@ BEGIN_FTR_SECTION ld r7,KSP_VSID(r4) /* Get new stack's VSID */ oris r0,r6,(SLB_ESID_V)@h ori r0,r0,(SLB_NUM_BOLTED-1)@l + + /* Update the last bolted SLB */ + ld r9,PACA_SLBSHADOWPTR(r13) + li r12,0 + std r12,SHADOW_SLB_BOLTED_STACK_ESID(r9) /* Clear ESID */ + std r7,SHADOW_SLB_BOLTED_STACK_VSID(r9) /* Save VSID */ + std r0,SHADOW_SLB_BOLTED_STACK_ESID(r9) /* Save ESID */ + slbie r6 slbie r6 /* Workaround POWER5 < DD2.1 issue */ slbmte r7,r0 diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index c68741fed14..55f1a25085c 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -17,6 +17,7 @@ #include <asm/lppaca.h> #include <asm/iseries/it_lp_reg_save.h> #include <asm/paca.h> +#include <asm/mmu.h> /* This symbol is provided by the linker - let it fill in the paca @@ -45,6 +46,17 @@ struct lppaca lppaca[] = { }, }; +/* + * 3 persistent SLBs are registered here. The buffer will be zero + * initially, hence will all be invaild until we actually write them. + */ +struct slb_shadow slb_shadow[] __cacheline_aligned = { + [0 ... (NR_CPUS-1)] = { + .persistent = SLB_NUM_BOLTED, + .buffer_length = sizeof(struct slb_shadow), + }, +}; + /* The Paca is an array with one entry per processor. Each contains an * lppaca, which contains the information shared between the * hypervisor and Linux. @@ -59,7 +71,8 @@ struct lppaca lppaca[] = { .lock_token = 0x8000, \ .paca_index = (number), /* Paca Index */ \ .kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL, \ - .hw_cpu_id = 0xffff, + .hw_cpu_id = 0xffff, \ + .slb_shadow_ptr = &slb_shadow[number], #ifdef CONFIG_PPC_ISERIES #define PACA_INIT_ISERIES(number) \ |