diff options
| -rw-r--r-- | arch/powerpc/include/asm/mmu-hash64.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/lparcfg.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/kernel/rtas.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/mm/slb.c | 16 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/reconfig.c | 9 |
5 files changed, 31 insertions, 6 deletions
diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h index 98c104a09961..edab67ee8e53 100644 --- a/arch/powerpc/include/asm/mmu-hash64.h +++ b/arch/powerpc/include/asm/mmu-hash64.h @@ -41,6 +41,7 @@ extern char initial_stab[]; #define SLB_NUM_BOLTED 3 #define SLB_CACHE_ENTRIES 8 +#define SLB_MIN_SIZE 32 /* Bits in the SLB ESID word */ #define SLB_ESID_V ASM_CONST(0x0000000008000000) /* valid */ @@ -296,6 +297,7 @@ extern void slb_flush_and_rebolt(void); extern void stab_initialize(unsigned long stab); extern void slb_vmalloc_update(void); +extern void slb_set_size(u16 size); #endif /* __ASSEMBLY__ */ /* diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c index 78b3f7840ade..f3bb5fb359c0 100644 --- a/arch/powerpc/kernel/lparcfg.c +++ b/arch/powerpc/kernel/lparcfg.c @@ -35,6 +35,7 @@ #include <asm/prom.h> #include <asm/vdso_datapage.h> #include <asm/vio.h> +#include <asm/mmu.h> #define MODULE_VERS "1.8" #define MODULE_NAME "lparcfg" @@ -501,6 +502,8 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v) seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc); + seq_printf(m, "slb_size=%d\n", mmu_slb_size); + return 0; } diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index ee4c7609b649..a36c6c32830f 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -38,6 +38,7 @@ #include <asm/syscalls.h> #include <asm/smp.h> #include <asm/atomic.h> +#include <asm/mmu.h> struct rtas_t rtas = { .lock = SPIN_LOCK_UNLOCKED @@ -692,6 +693,7 @@ static void rtas_percpu_suspend_me(void *info) { long rc = H_SUCCESS; unsigned long msr_save; + u16 slb_size = mmu_slb_size; int cpu; struct rtas_suspend_me_data *data = (struct rtas_suspend_me_data *)info; @@ -714,13 +716,16 @@ static void rtas_percpu_suspend_me(void *info) /* All other cpus are in H_JOIN, this cpu does * the suspend. */ + slb_set_size(SLB_MIN_SIZE); printk(KERN_DEBUG "calling ibm,suspend-me on cpu %i\n", smp_processor_id()); data->error = rtas_call(data->token, 0, 1, NULL); - if (data->error) + if (data->error) { printk(KERN_DEBUG "ibm,suspend-me returned %d\n", data->error); + slb_set_size(slb_size); + } } else { printk(KERN_ERR "H_JOIN on cpu %i failed with rc = %ld\n", smp_processor_id(), rc); diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c index 89497fb04280..4d7376586693 100644 --- a/arch/powerpc/mm/slb.c +++ b/arch/powerpc/mm/slb.c @@ -247,14 +247,22 @@ void switch_slb(struct task_struct *tsk, struct mm_struct *mm) static inline void patch_slb_encoding(unsigned int *insn_addr, unsigned int immed) { - /* Assume the instruction had a "0" immediate value, just - * "or" in the new value - */ - *insn_addr |= immed; + *insn_addr = (*insn_addr & 0xffff0000) | immed; flush_icache_range((unsigned long)insn_addr, 4+ (unsigned long)insn_addr); } +void slb_set_size(u16 size) +{ + extern unsigned int *slb_compare_rr_to_size; + + if (mmu_slb_size == size) + return; + + mmu_slb_size = size; + patch_slb_encoding(slb_compare_rr_to_size, mmu_slb_size); +} + void slb_initialize(void) { unsigned long linear_llp, vmalloc_llp, io_llp; diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c index b6f1b137d427..2e2bbe120b90 100644 --- a/arch/powerpc/platforms/pseries/reconfig.c +++ b/arch/powerpc/platforms/pseries/reconfig.c @@ -20,6 +20,7 @@ #include <asm/machdep.h> #include <asm/uaccess.h> #include <asm/pSeries_reconfig.h> +#include <asm/mmu.h> @@ -439,9 +440,15 @@ static int do_update_property(char *buf, size_t bufsize) if (!newprop) return -ENOMEM; + if (!strcmp(name, "slb-size") || !strcmp(name, "ibm,slb-size")) + slb_set_size(*(int *)value); + oldprop = of_find_property(np, name,NULL); - if (!oldprop) + if (!oldprop) { + if (strlen(name)) + return prom_add_property(np, newprop); return -ENODEV; + } rc = prom_update_property(np, newprop, oldprop); if (rc) |