From: Michael Neuling Date: Thu, 8 Jun 2006 04:42:34 +0000 (+1000) Subject: [PATCH] powerpc: oprofile support for POWER6 X-Git-Tag: v2.6.18-rc1~1081^2~225^2~71 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e78dbc800c37f035d476c4fdebdf43cdecfcb731;p=linux-2.6 [PATCH] powerpc: oprofile support for POWER6 POWER6 moves some of the MMCRA bits and also requires some bits to be cleared each PMU interrupt. Signed-off-by: Michael Neuling Acked-by: Anton Blanchard Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c index 7dcc01be4b..83f9ab139d 100644 --- a/arch/powerpc/kernel/cputable.c +++ b/arch/powerpc/kernel/cputable.c @@ -237,6 +237,11 @@ struct cpu_spec cpu_specs[] = { .num_pmcs = 6, .oprofile_cpu_type = "ppc64/power5", .oprofile_type = PPC_OPROFILE_POWER4, + /* SIHV / SIPR bits are implemented on POWER4+ (GQ) + * and above but only works on POWER5 and above + */ + .oprofile_mmcra_sihv = MMCRA_SIHV, + .oprofile_mmcra_sipr = MMCRA_SIPR, .platform = "power5", }, { /* Power5 GS */ @@ -250,6 +255,8 @@ struct cpu_spec cpu_specs[] = { .num_pmcs = 6, .oprofile_cpu_type = "ppc64/power5+", .oprofile_type = PPC_OPROFILE_POWER4, + .oprofile_mmcra_sihv = MMCRA_SIHV, + .oprofile_mmcra_sipr = MMCRA_SIPR, .platform = "power5+", }, { /* Power6 */ @@ -260,9 +267,13 @@ struct cpu_spec cpu_specs[] = { .cpu_user_features = COMMON_USER_POWER6, .icache_bsize = 128, .dcache_bsize = 128, - .num_pmcs = 6, + .num_pmcs = 8, .oprofile_cpu_type = "ppc64/power6", .oprofile_type = PPC_OPROFILE_POWER4, + .oprofile_mmcra_sihv = POWER6_MMCRA_SIHV, + .oprofile_mmcra_sipr = POWER6_MMCRA_SIPR, + .oprofile_mmcra_clear = POWER6_MMCRA_THRM | + POWER6_MMCRA_OTHER, .platform = "power6", }, { /* Cell Broadband Engine */ diff --git a/arch/powerpc/oprofile/op_model_power4.c b/arch/powerpc/oprofile/op_model_power4.c index 4c2beab1fd..506f6b79f8 100644 --- a/arch/powerpc/oprofile/op_model_power4.c +++ b/arch/powerpc/oprofile/op_model_power4.c @@ -24,10 +24,6 @@ static unsigned long reset_value[OP_MAX_COUNTER]; static int oprofile_running; -static int mmcra_has_sihv; -/* Unfortunately these bits vary between CPUs */ -static unsigned long mmcra_sihv = MMCRA_SIHV; -static unsigned long mmcra_sipr = MMCRA_SIPR; /* mmcr values are set in power4_reg_setup, used in power4_cpu_setup */ static u32 mmcr0_val; @@ -40,16 +36,6 @@ static void power4_reg_setup(struct op_counter_config *ctr, { int i; - /* - * SIHV / SIPR bits are only implemented on POWER4+ (GQ) and above. - * However we disable it on all POWER4 until we verify it works - * (I was seeing some strange behaviour last time I tried). - * - * It has been verified to work on POWER5 so we enable it there. - */ - if (cpu_has_feature(CPU_FTR_MMCRA_SIHV)) - mmcra_has_sihv = 1; - /* * The performance counter event settings are given in the mmcr0, * mmcr1 and mmcra values passed from the user in the @@ -202,18 +188,19 @@ static unsigned long get_pc(struct pt_regs *regs) unsigned long mmcra; /* Cant do much about it */ - if (!mmcra_has_sihv) + if (!cur_cpu_spec->oprofile_mmcra_sihv) return pc; mmcra = mfspr(SPRN_MMCRA); /* Were we in the hypervisor? */ - if (firmware_has_feature(FW_FEATURE_LPAR) && (mmcra & mmcra_sihv)) + if (firmware_has_feature(FW_FEATURE_LPAR) && + (mmcra & cur_cpu_spec->oprofile_mmcra_sihv)) /* function descriptor madness */ return *((unsigned long *)hypervisor_bucket); /* We were in userspace, nothing to do */ - if (mmcra & mmcra_sipr) + if (mmcra & cur_cpu_spec->oprofile_mmcra_sipr) return pc; #ifdef CONFIG_PPC_RTAS @@ -235,15 +222,14 @@ static unsigned long get_pc(struct pt_regs *regs) return pc; } -static int get_kernel(unsigned long pc) +static int get_kernel(unsigned long pc, unsigned long mmcra) { int is_kernel; - if (!mmcra_has_sihv) { + if (!cur_cpu_spec->oprofile_mmcra_sihv) { is_kernel = is_kernel_addr(pc); } else { - unsigned long mmcra = mfspr(SPRN_MMCRA); - is_kernel = ((mmcra & mmcra_sipr) == 0); + is_kernel = ((mmcra & cur_cpu_spec->oprofile_mmcra_sipr) == 0); } return is_kernel; @@ -257,9 +243,12 @@ static void power4_handle_interrupt(struct pt_regs *regs, int val; int i; unsigned int mmcr0; + unsigned long mmcra; + + mmcra = mfspr(SPRN_MMCRA); pc = get_pc(regs); - is_kernel = get_kernel(pc); + is_kernel = get_kernel(pc, mmcra); /* set the PMM bit (see comment below) */ mtmsrd(mfmsr() | MSR_PMM); @@ -287,6 +276,10 @@ static void power4_handle_interrupt(struct pt_regs *regs, */ mmcr0 &= ~MMCR0_PMAO; + /* Clear the appropriate bits in the MMCRA */ + mmcra &= ~cur_cpu_spec->oprofile_mmcra_clear; + mtspr(SPRN_MMCRA, mmcra); + /* * now clear the freeze bit, counting will not start until we * rfid from this exception, because only at that point will diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h index 9fcf0162d8..defc166379 100644 --- a/include/asm-powerpc/cputable.h +++ b/include/asm-powerpc/cputable.h @@ -69,6 +69,13 @@ struct cpu_spec { /* Processor specific oprofile operations */ enum powerpc_oprofile_type oprofile_type; + /* Bit locations inside the mmcra change */ + unsigned long oprofile_mmcra_sihv; + unsigned long oprofile_mmcra_sipr; + + /* Bits to clear during an oprofile exception */ + unsigned long oprofile_mmcra_clear; + /* Name of processor class, for the ELF AT_PLATFORM entry */ char *platform; }; @@ -117,7 +124,6 @@ extern void do_cpu_ftr_fixups(unsigned long offset); #define CPU_FTR_SMT ASM_CONST(0x0000010000000000) #define CPU_FTR_COHERENT_ICACHE ASM_CONST(0x0000020000000000) #define CPU_FTR_LOCKLESS_TLBIE ASM_CONST(0x0000040000000000) -#define CPU_FTR_MMCRA_SIHV ASM_CONST(0x0000080000000000) #define CPU_FTR_CI_LARGE_PAGE ASM_CONST(0x0000100000000000) #define CPU_FTR_PAUSE_ZERO ASM_CONST(0x0000200000000000) #define CPU_FTR_PURR ASM_CONST(0x0000400000000000) @@ -134,7 +140,6 @@ extern void do_cpu_ftr_fixups(unsigned long offset); #define CPU_FTR_SMT ASM_CONST(0x0) #define CPU_FTR_COHERENT_ICACHE ASM_CONST(0x0) #define CPU_FTR_LOCKLESS_TLBIE ASM_CONST(0x0) -#define CPU_FTR_MMCRA_SIHV ASM_CONST(0x0) #define CPU_FTR_CI_LARGE_PAGE ASM_CONST(0x0) #define CPU_FTR_PURR ASM_CONST(0x0) #endif @@ -320,7 +325,7 @@ extern void do_cpu_ftr_fixups(unsigned long offset); CPU_FTR_HPTE_TABLE | CPU_FTR_PPCAS_ARCH_V2 | \ CPU_FTR_MMCRA | CPU_FTR_SMT | \ CPU_FTR_COHERENT_ICACHE | CPU_FTR_LOCKLESS_TLBIE | \ - CPU_FTR_MMCRA_SIHV | CPU_FTR_PURR) + CPU_FTR_PURR) #define CPU_FTRS_POWER6 (CPU_FTR_SPLIT_ID_CACHE | CPU_FTR_USE_TB | \ CPU_FTR_HPTE_TABLE | CPU_FTR_PPCAS_ARCH_V2 | \ CPU_FTR_MMCRA | CPU_FTR_SMT | \ diff --git a/include/asm-powerpc/reg.h b/include/asm-powerpc/reg.h index 0257189d50..3779b21a7c 100644 --- a/include/asm-powerpc/reg.h +++ b/include/asm-powerpc/reg.h @@ -443,6 +443,10 @@ #define MMCRA_SIHV 0x10000000UL /* state of MSR HV when SIAR set */ #define MMCRA_SIPR 0x08000000UL /* state of MSR PR when SIAR set */ #define MMCRA_SAMPLE_ENABLE 0x00000001UL /* enable sampling */ +#define POWER6_MMCRA_SIHV 0x0000040000000000ULL +#define POWER6_MMCRA_SIPR 0x0000020000000000ULL +#define POWER6_MMCRA_THRM 0x00000020UL +#define POWER6_MMCRA_OTHER 0x0000000EUL #define SPRN_PMC1 787 #define SPRN_PMC2 788 #define SPRN_PMC3 789