diff options
| author | David Matlack <dmatlack@google.com> | 2021-07-13 22:09:53 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-02 11:01:47 -0400 |
| commit | 61bcd360aa9851cec969b7b40f23fd1faa7f85a4 (patch) | |
| tree | bb33015ac788ae892b9d90345b0b8d1256032e2a /arch/x86/kvm/mmu/mmu.c | |
| parent | 76cd325ea75bb2a84c329782d7b8015b6a970c34 (diff) | |
| download | lwn-61bcd360aa9851cec969b7b40f23fd1faa7f85a4.tar.gz lwn-61bcd360aa9851cec969b7b40f23fd1faa7f85a4.zip | |
KVM: x86/mmu: Fix use of enums in trace_fast_page_fault
Enum values have to be exported to userspace since the formatting is not
done in the kernel. Without doing this perf maps RET_PF_FIXED and
RET_PF_SPURIOUS to 0, which results in incorrect output:
$ perf record -a -e kvmmmu:fast_page_fault --filter "ret==3" -- ./access_tracking_perf_test
$ perf script | head -1
[...] new 610006048d25877 spurious 0 fixed 0 <------ should be 1
Fix this by exporting the enum values to userspace with TRACE_DEFINE_ENUM.
Fixes: c4371c2a682e ("KVM: x86/mmu: Return unique RET_PF_* values if the fault was fixed")
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20210713220957.3493520-3-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/mmu.c')
0 files changed, 0 insertions, 0 deletions