diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2016-02-22 22:19:11 +0000 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2016-02-29 09:35:15 +0100 |
commit | a46195f1782e94ad07e7485fb15b80db7e60e7aa (patch) | |
tree | a5d4f8a1ece05924b46d9680a43c89de03fa58d1 /arch/x86/events/intel/uncore_snb.c | |
parent | 83f8ebd2eb459b21e8e74d43c75e1be666ec8b97 (diff) | |
download | linux-a46195f1782e94ad07e7485fb15b80db7e60e7aa.tar.bz2 |
perf/x86/intel/uncore: Clean up hardware on exit
When tearing down the boxes nothing undoes the hardware state which was setup
by box->init_box(). Add a box->exit_box() callback and implement it for the
uncores which have an init_box() callback.
This misses the cleanup in the error exit pathes, but I cannot be bothered to
implement it before cleaning up the rest of the driver, which makes that task
way simpler.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.023930023@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/events/intel/uncore_snb.c')
-rw-r--r-- | arch/x86/events/intel/uncore_snb.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/events/intel/uncore_snb.c b/arch/x86/events/intel/uncore_snb.c index 2049d26a7ae6..120e106389f6 100644 --- a/arch/x86/events/intel/uncore_snb.c +++ b/arch/x86/events/intel/uncore_snb.c @@ -95,6 +95,12 @@ static void snb_uncore_msr_init_box(struct intel_uncore_box *box) } } +static void snb_uncore_msr_exit_box(struct intel_uncore_box *box) +{ + if (box->pmu->pmu_idx == 0) + wrmsrl(SNB_UNC_PERF_GLOBAL_CTL, 0); +} + static struct uncore_event_desc snb_uncore_events[] = { INTEL_UNCORE_EVENT_DESC(clockticks, "event=0xff,umask=0x00"), { /* end: all zeroes */ }, @@ -116,6 +122,7 @@ static struct attribute_group snb_uncore_format_group = { static struct intel_uncore_ops snb_uncore_msr_ops = { .init_box = snb_uncore_msr_init_box, + .exit_box = snb_uncore_msr_exit_box, .disable_event = snb_uncore_msr_disable_event, .enable_event = snb_uncore_msr_enable_event, .read_counter = uncore_msr_read_counter, @@ -231,6 +238,11 @@ static void snb_uncore_imc_init_box(struct intel_uncore_box *box) box->hrtimer_duration = UNCORE_SNB_IMC_HRTIMER_INTERVAL; } +static void snb_uncore_imc_exit_box(struct intel_uncore_box *box) +{ + iounmap(box->io_addr); +} + static void snb_uncore_imc_enable_box(struct intel_uncore_box *box) {} @@ -458,6 +470,7 @@ static struct pmu snb_uncore_imc_pmu = { static struct intel_uncore_ops snb_uncore_imc_ops = { .init_box = snb_uncore_imc_init_box, + .exit_box = snb_uncore_imc_exit_box, .enable_box = snb_uncore_imc_enable_box, .disable_box = snb_uncore_imc_disable_box, .disable_event = snb_uncore_imc_disable_event, |