diff options
author | Jens Axboe <axboe@kernel.dk> | 2018-02-05 12:55:38 -0700 |
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committer | Jens Axboe <axboe@kernel.dk> | 2018-02-05 12:55:38 -0700 |
commit | 9e05c864993c5442227f83ae1694a737d7a102ed (patch) | |
tree | e35b60bb3c0c179f147e9acaad5444f1e5d9117e /arch/powerpc/perf/8xx-pmu.c | |
parent | 3c15f3f545afa320c5e3822825a9a53c664776b6 (diff) | |
parent | 35277995e17919ab838beae765f440674e8576eb (diff) |
Merge branch 'master' into test
* master: (688 commits)
dt-bindings: mailbox: qcom: Document the APCS clock binding
mailbox: qcom: Create APCS child device for clock controller
mailbox: qcom: Convert APCS IPC driver to use regmap
KVM/SVM: Allow direct access to MSR_IA32_SPEC_CTRL
KVM/VMX: Allow direct access to MSR_IA32_SPEC_CTRL
KVM/VMX: Emulate MSR_IA32_ARCH_CAPABILITIES
KVM/x86: Add IBPB support
KVM/x86: Update the reverse_cpuid list to include CPUID_7_EDX
pinctrl: remove include file from <linux/device.h>
firmware: dmi: handle missing DMI data gracefully
firmware: dmi_scan: Fix handling of empty DMI strings
firmware: dmi_scan: Drop dmi_initialized
firmware: dmi: Optimize dmi_matches
Revert "defer call to mem_cgroup_sk_alloc()"
soreuseport: fix mem leak in reuseport_add_sock()
net: qlge: use memmove instead of skb_copy_to_linear_data
net: qed: use correct strncpy() size
net: cxgb4: avoid memcpy beyond end of source buffer
cls_u32: add missing RCU annotation.
r8152: set rx mode early when linking on
...
Diffstat (limited to 'arch/powerpc/perf/8xx-pmu.c')
-rw-r--r-- | arch/powerpc/perf/8xx-pmu.c | 52 |
1 files changed, 48 insertions, 4 deletions
diff --git a/arch/powerpc/perf/8xx-pmu.c b/arch/powerpc/perf/8xx-pmu.c index 3c39f05f0af3..6c0020d1c561 100644 --- a/arch/powerpc/perf/8xx-pmu.c +++ b/arch/powerpc/perf/8xx-pmu.c @@ -18,6 +18,7 @@ #include <asm/machdep.h> #include <asm/firmware.h> #include <asm/ptrace.h> +#include <asm/code-patching.h> #define PERF_8xx_ID_CPU_CYCLES 1 #define PERF_8xx_ID_HW_INSTRUCTIONS 2 @@ -30,8 +31,13 @@ extern unsigned long itlb_miss_counter, dtlb_miss_counter; extern atomic_t instruction_counter; +extern unsigned int itlb_miss_perf, dtlb_miss_perf; +extern unsigned int itlb_miss_exit_1, itlb_miss_exit_2; +extern unsigned int dtlb_miss_exit_1, dtlb_miss_exit_2, dtlb_miss_exit_3; static atomic_t insn_ctr_ref; +static atomic_t itlb_miss_ref; +static atomic_t dtlb_miss_ref; static s64 get_insn_ctr(void) { @@ -96,9 +102,24 @@ static int mpc8xx_pmu_add(struct perf_event *event, int flags) val = get_insn_ctr(); break; case PERF_8xx_ID_ITLB_LOAD_MISS: + if (atomic_inc_return(&itlb_miss_ref) == 1) { + unsigned long target = (unsigned long)&itlb_miss_perf; + + patch_branch(&itlb_miss_exit_1, target, 0); +#ifndef CONFIG_PIN_TLB_TEXT + patch_branch(&itlb_miss_exit_2, target, 0); +#endif + } val = itlb_miss_counter; break; case PERF_8xx_ID_DTLB_LOAD_MISS: + if (atomic_inc_return(&dtlb_miss_ref) == 1) { + unsigned long target = (unsigned long)&dtlb_miss_perf; + + patch_branch(&dtlb_miss_exit_1, target, 0); + patch_branch(&dtlb_miss_exit_2, target, 0); + patch_branch(&dtlb_miss_exit_3, target, 0); + } val = dtlb_miss_counter; break; } @@ -143,13 +164,36 @@ static void mpc8xx_pmu_read(struct perf_event *event) static void mpc8xx_pmu_del(struct perf_event *event, int flags) { + /* mfspr r10, SPRN_SPRG_SCRATCH0 */ + unsigned int insn = PPC_INST_MFSPR | __PPC_RS(R10) | + __PPC_SPR(SPRN_SPRG_SCRATCH0); + mpc8xx_pmu_read(event); - if (event_type(event) != PERF_8xx_ID_HW_INSTRUCTIONS) - return; /* If it was the last user, stop counting to avoid useles overhead */ - if (atomic_dec_return(&insn_ctr_ref) == 0) - mtspr(SPRN_ICTRL, 7); + switch (event_type(event)) { + case PERF_8xx_ID_CPU_CYCLES: + break; + case PERF_8xx_ID_HW_INSTRUCTIONS: + if (atomic_dec_return(&insn_ctr_ref) == 0) + mtspr(SPRN_ICTRL, 7); + break; + case PERF_8xx_ID_ITLB_LOAD_MISS: + if (atomic_dec_return(&itlb_miss_ref) == 0) { + patch_instruction(&itlb_miss_exit_1, insn); +#ifndef CONFIG_PIN_TLB_TEXT + patch_instruction(&itlb_miss_exit_2, insn); +#endif + } + break; + case PERF_8xx_ID_DTLB_LOAD_MISS: + if (atomic_dec_return(&dtlb_miss_ref) == 0) { + patch_instruction(&dtlb_miss_exit_1, insn); + patch_instruction(&dtlb_miss_exit_2, insn); + patch_instruction(&dtlb_miss_exit_3, insn); + } + break; + } } static struct pmu mpc8xx_pmu = { |