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| author | Anju T Sudhakar <anju@linux.vnet.ibm.com> | 2018-05-22 12:12:37 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-06-03 13:43:37 +0300 |
| commit | 25af86b2aeb60dd52bd18a875124490e23bd4515 (patch) | |
| tree | 0da13f3338cd72d753a1debda8ae0e5082f91f72 /arch/powerpc/platforms/powernv/opal-imc.c | |
| parent | e7a8ac433845aa86f39bf404ae4b7709f21c7d70 (diff) | |
| download | linux-25af86b2aeb60dd52bd18a875124490e23bd4515.tar.xz | |
powerpc/perf: Unregister thread-imc if core-imc not supported
Since thread-imc internally use the core-imc hardware infrastructure
and is depended on it, having thread-imc in the kernel in the
absence of core-imc is trivial. Patch disables thread-imc, if
core-imc is not registered.
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal-imc.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-imc.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c index 490bb721879f..58a07948c76e 100644 --- a/arch/powerpc/platforms/powernv/opal-imc.c +++ b/arch/powerpc/platforms/powernv/opal-imc.c @@ -255,6 +255,7 @@ static int opal_imc_counters_probe(struct platform_device *pdev) { struct device_node *imc_dev = pdev->dev.of_node; int pmu_count = 0, domain; + bool core_imc_reg = false, thread_imc_reg = false; u32 type; /* @@ -292,6 +293,10 @@ static int opal_imc_counters_probe(struct platform_device *pdev) if (!imc_pmu_create(imc_dev, pmu_count, domain)) { if (domain == IMC_DOMAIN_NEST) pmu_count++; + if (domain == IMC_DOMAIN_CORE) + core_imc_reg = true; + if (domain == IMC_DOMAIN_THREAD) + thread_imc_reg = true; } } @@ -299,6 +304,10 @@ static int opal_imc_counters_probe(struct platform_device *pdev) if (pmu_count == 0) debugfs_remove_recursive(imc_debugfs_parent); + /* If core imc is not registered, unregister thread-imc */ + if (!core_imc_reg && thread_imc_reg) + unregister_thread_imc(); + return 0; } |