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Subject: [tip: perf/core] perf/x86/amd: Reject branch stack for IBS events
Cc: Namhyung Kim <namhyung@kernel.org>,
Ravi Bangoria <ravi.bangoria@amd.com>,
Ingo Molnar <mingo@kernel.org>, x86@kernel.org,
linux-kernel@vger.kernel.org
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[tip:,perf/core] perf/x86/amd: Reject branch stack for IBS events
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Commit Message
tip-bot2 for Thomas Gleixner
Nov. 30, 2023, 8:42 a.m. UTC
The following commit has been merged into the perf/core branch of tip: Commit-ID: 0f9e0d7928d8e88d57b1482effab70edb9741ce1 Gitweb: https://git.kernel.org/tip/0f9e0d7928d8e88d57b1482effab70edb9741ce1 Author: Namhyung Kim <namhyung@kernel.org> AuthorDate: Thu, 30 Nov 2023 11:52:46 +05:30 Committer: Ingo Molnar <mingo@kernel.org> CommitterDate: Thu, 30 Nov 2023 09:34:40 +01:00 perf/x86/amd: Reject branch stack for IBS events The AMD IBS PMU doesn't handle branch stacks, so it should not accept events with brstack. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20231130062246.290-1-ravi.bangoria@amd.com --- arch/x86/events/amd/ibs.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c index 6911c53..e91970b 100644 --- a/arch/x86/events/amd/ibs.c +++ b/arch/x86/events/amd/ibs.c @@ -287,6 +287,9 @@ static int perf_ibs_init(struct perf_event *event) if (config & ~perf_ibs->config_mask) return -EINVAL; + if (has_branch_stack(event)) + return -EOPNOTSUPP; + ret = validate_group(event); if (ret) return ret;