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| author | Kan Liang <kan.liang@linux.intel.com> | 2019-04-30 17:53:43 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-26 09:14:08 +0200 |
| commit | dd0260fd1e3af66a3b3c87301f72cb04d3dcf147 (patch) | |
| tree | f1c2f2344f2a964bbc59bf97b758e42d31ecce91 /Documentation | |
| parent | 7fc96cd2b0decd8bdd0c8dee1d7845450ebcfd1c (diff) | |
| download | linux-stable-dd0260fd1e3af66a3b3c87301f72cb04d3dcf147.tar.gz linux-stable-dd0260fd1e3af66a3b3c87301f72cb04d3dcf147.tar.bz2 linux-stable-dd0260fd1e3af66a3b3c87301f72cb04d3dcf147.zip | |
perf/x86/intel/uncore: Handle invalid event coding for free-running counter
[ Upstream commit 543ac280b3576c0009e8c0fcd4d6bfc9978d7bd0 ]
Counting with invalid event coding for free-running counter may cause
OOPs, e.g. uncore_iio_free_running_0/event=1/.
Current code only validate the event with free-running event format,
event=0xff,umask=0xXY. Non-free-running event format never be checked
for the PMU with free-running counters.
Add generic hw_config() to check and reject the invalid event coding
for free-running PMU.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@kernel.org
Cc: eranian@google.com
Fixes: 0f519f0352e3 ("perf/x86/intel/uncore: Support IIO free-running counters on SKX")
Link: https://lkml.kernel.org/r/1556672028-119221-2-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions