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Sean Christopherson cfc2faf3a6 perf/x86: Refuse to export capabilities for hybrid PMUs 
commit 4b4191b8ae upstream.

Now that KVM disables vPMU support on hybrid CPUs, WARN and return zeros
if perf_get_x86_pmu_capability() is invoked on a hybrid CPU.  The helper
doesn't provide an accurate accounting of the PMU capabilities for hybrid
CPUs and needs to be enhanced if KVM, or anything else outside of perf,
wants to act on the PMU capabilities.

Cc: stable@vger.kernel.org
Cc: Andrew Cooper <Andrew.Cooper3@citrix.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: https://lore.kernel.org/all/20220818181530.2355034-1-kan.liang@linux.intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230208204230.1360502-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2023-02-22 12:59:55 +01:00
..
amd perf/x86/amd: fix potential integer overflow on shift of a int 2023-02-01 08:34:51 +01:00
intel perf/x86/intel/cstate: Add Emerald Rapids 2023-02-09 11:28:12 +01:00
zhaoxin x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
core.c perf/x86: Refuse to export capabilities for hybrid PMUs 2023-02-22 12:59:55 +01:00
Kconfig perf/x86/Kconfig: Fix indentation in the Kconfig file 2022-05-25 15:54:26 +02:00
Makefile perf/x86: Move branch classifier 2022-08-27 00:05:44 +02:00
msr.c perf/x86/msr: Add Emerald Rapids 2023-02-01 08:34:30 +01:00
perf_event.h Perf events updates for v6.1: 2022-10-10 09:27:46 -07:00
perf_event_flags.h x86/perf: Assert all platform event flags are within PERF_EVENT_FLAG_ARCH 2022-09-07 21:54:01 +02:00
probe.c perf/x86/rapl: Add msr mask support 2021-02-10 14:44:54 +01:00
probe.h perf/x86/rapl: Add msr mask support 2021-02-10 14:44:54 +01:00
rapl.c perf/x86/rapl: Add support for Intel Emerald Rapids 2023-01-24 07:24:32 +01:00
utils.c perf/x86/utils: Fix uninitialized var in get_branch_type() 2022-09-29 12:20:56 +02:00