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| author | Aaron Lewis <aaronlewis@google.com> | 2022-05-17 08:12:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-21 16:16:26 +0300 |
| commit | 98b20e1612e69bf91185cf722a96293a136fe894 (patch) | |
| tree | 0d1735a4271faeed86bd11e829a67c916bc409ae /drivers | |
| parent | 705dfc4575d6fae17c60a222cb5f78d8de43be38 (diff) | |
| download | linux-98b20e1612e69bf91185cf722a96293a136fe894.tar.xz | |
kvm: x86/pmu: Fix the compare function used by the pmu event filter
commit 4ac19ead0dfbabd8e0bfc731f507cfb0b95d6c99 upstream.
When returning from the compare function the u64 is truncated to an
int. This results in a loss of the high nybble[1] in the event select
and its sign if that nybble is in use. Switch from using a result that
can end up being truncated to a result that can only be: 1, 0, -1.
[1] bits 35:32 in the event select register and bits 11:8 in the event
select.
Fixes: 7ff775aca48ad ("KVM: x86/pmu: Use binary search to check filtered events")
Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220517051238.2566934-1-aaronlewis@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions