diff options
| author | Madhavan Srinivasan <maddy@linux.ibm.com> | 2020-07-17 17:38:19 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-22 14:56:41 +0300 |
| commit | 9908c826d5ed150637a3a4c0eec5146a0c438f21 (patch) | |
| tree | 7601154a5dd2566141cda80b527e8a1d0aea2200 /arch/powerpc/kernel/dt_cpu_ftrs.c | |
| parent | 1979ae8c7215718c7a98f038bad0122034ad6529 (diff) | |
| download | linux-9908c826d5ed150637a3a4c0eec5146a0c438f21.tar.xz | |
powerpc/perf: Add Power10 PMU feature to DT CPU features
Add Power10 feature function to DT CPU features, along with a Power10
specific init() to initialize PMU SPRs, sets the oprofile_cpu_type and
cpu_features. This will enable performance monitoring unit (PMU) for
Power10 in CPU features with "performance-monitor-power10".
For Power ISA v3.1, BHRB disable is controlled via Monitor Mode
Control Register A (MMCRA) bit, namely "BHRB Recording
Disable (BHRBRD)". This patch initializes MMCRA BHRBRD to disable BHRB
feature at boot for Power10.
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
[mpe: Move MMCRA_BHRB_DISABLE as noted by jpn, drop CPU setup changes]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1594996707-3727-8-git-send-email-atrajeev@linux.vnet.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/dt_cpu_ftrs.c')
| -rw-r--r-- | arch/powerpc/kernel/dt_cpu_ftrs.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c index 9aa8537f7da2..0d65d9597778 100644 --- a/arch/powerpc/kernel/dt_cpu_ftrs.c +++ b/arch/powerpc/kernel/dt_cpu_ftrs.c @@ -450,6 +450,31 @@ static int __init feat_enable_pmu_power9(struct dt_cpu_feature *f) return 1; } +static void init_pmu_power10(void) +{ + init_pmu_power9(); + + mtspr(SPRN_MMCR3, 0); + mtspr(SPRN_MMCRA, MMCRA_BHRB_DISABLE); +} + +static int __init feat_enable_pmu_power10(struct dt_cpu_feature *f) +{ + hfscr_pmu_enable(); + + init_pmu_power10(); + init_pmu_registers = init_pmu_power10; + + cur_cpu_spec->cpu_features |= CPU_FTR_MMCRA; + cur_cpu_spec->cpu_user_features |= PPC_FEATURE_PSERIES_PERFMON_COMPAT; + + cur_cpu_spec->num_pmcs = 6; + cur_cpu_spec->pmc_type = PPC_PMC_IBM; + cur_cpu_spec->oprofile_cpu_type = "ppc64/power10"; + + return 1; +} + static int __init feat_enable_tm(struct dt_cpu_feature *f) { #ifdef CONFIG_PPC_TRANSACTIONAL_MEM @@ -639,6 +664,7 @@ static struct dt_cpu_feature_match __initdata {"pc-relative-addressing", feat_enable, 0}, {"machine-check-power9", feat_enable_mce_power9, 0}, {"performance-monitor-power9", feat_enable_pmu_power9, 0}, + {"performance-monitor-power10", feat_enable_pmu_power10, 0}, {"event-based-branch-v3", feat_enable, 0}, {"random-number-generator", feat_enable, 0}, {"system-call-vectored", feat_disable, 0}, |