KVM: x86/svm: Account for family 17h event renumberings in amd_pmc_perf_hw_id
stable inclusion from stable-v5.10.115 commit fbb7c61e76017202dedd2020f4d51264f500de68 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5IZ9C Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=fbb7c61e76017202dedd2020f4d51264f500de68 -------------------------------- commit 5eb84932 upstream. Zen renumbered some of the performance counters that correspond to the well known events in perf_hw_id. This code in KVM was never updated for that, so guest that attempt to use counters on Zen that correspond to the pre-Zen perf_hw_id values will silently receive the wrong values. This has been observed in the wild with rr[0] when running in Zen 3 guests. rr uses the retired conditional branch counter 00d1 which is incorrectly recognized by KVM as PERF_COUNT_HW_STALLED_CYCLES_BACKEND. [0] https://rr-project.org/ Signed-off-by:Kyle Huey <me@kylehuey.com> Message-Id: <20220503050136.86298-1-khuey@kylehuey.com> Cc: stable@vger.kernel.org [Check guest family, not host. - Paolo] Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
Zheng Zengkai <zhengzengkai@huawei.com> Acked-by:
Xie XiuQi <xiexiuqi@huawei.com>
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