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| author | Kim Phillips <kim.phillips@amd.com> | 2021-08-17 17:10:47 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2021-08-26 09:14:36 +0200 |
| commit | 05485745ad482c1910a45f23a5c255f6a0df0f46 (patch) | |
| tree | 67988c1c87f5c382031ab602cad24280a502198f /arch/x86/events/amd/uncore.c | |
| parent | 9164d9493a792682143af12b182be12d7c32b195 (diff) | |
| download | linux-05485745ad482c1910a45f23a5c255f6a0df0f46.tar.gz | |
perf/amd/uncore: Allow the driver to be built as a module
Add support to build the AMD uncore driver as a module.
This is in order to facilitate development without having
to reboot the kernel in most cases.
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210817221048.88063-8-kim.phillips@amd.com
Diffstat (limited to 'arch/x86/events/amd/uncore.c')
| -rw-r--r-- | arch/x86/events/amd/uncore.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c index a01f9f1016d9..0d04414b97d2 100644 --- a/arch/x86/events/amd/uncore.c +++ b/arch/x86/events/amd/uncore.c @@ -347,6 +347,7 @@ static struct pmu amd_nb_pmu = { .stop = amd_uncore_stop, .read = amd_uncore_read, .capabilities = PERF_PMU_CAP_NO_EXCLUDE | PERF_PMU_CAP_NO_INTERRUPT, + .module = THIS_MODULE, }; static struct pmu amd_llc_pmu = { @@ -360,6 +361,7 @@ static struct pmu amd_llc_pmu = { .stop = amd_uncore_stop, .read = amd_uncore_read, .capabilities = PERF_PMU_CAP_NO_EXCLUDE | PERF_PMU_CAP_NO_INTERRUPT, + .module = THIS_MODULE, }; static struct amd_uncore *amd_uncore_alloc(unsigned int cpu) @@ -665,4 +667,28 @@ fail_nb: return ret; } -device_initcall(amd_uncore_init); + +static void __exit amd_uncore_exit(void) +{ + cpuhp_remove_state(CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE); + cpuhp_remove_state(CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING); + cpuhp_remove_state(CPUHP_PERF_X86_AMD_UNCORE_PREP); + + if (boot_cpu_has(X86_FEATURE_PERFCTR_LLC)) { + perf_pmu_unregister(&amd_llc_pmu); + free_percpu(amd_uncore_llc); + amd_uncore_llc = NULL; + } + + if (boot_cpu_has(X86_FEATURE_PERFCTR_NB)) { + perf_pmu_unregister(&amd_nb_pmu); + free_percpu(amd_uncore_nb); + amd_uncore_nb = NULL; + } +} + +module_init(amd_uncore_init); +module_exit(amd_uncore_exit); + +MODULE_DESCRIPTION("AMD Uncore Driver"); +MODULE_LICENSE("GPL v2"); |