Commit 35ba18ce authored by Jim Mattson's avatar Jim Mattson Committed by Zheng Zengkai
Browse files

KVM: x86/pmu: Don't truncate the PerfEvtSeln MSR when creating a perf event

stable inclusion
from stable-v5.10.102
commit 0ee4bb8ce8b8279a2fa811efccc9422d0b6d9bff
bugzilla: https://gitee.com/openeuler/kernel/issues/I567K6

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0ee4bb8ce8b8279a2fa811efccc9422d0b6d9bff



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[ Upstream commit b8bfee85 ]

AMD's event select is 3 nybbles, with the high nybble in bits 35:32 of
a PerfEvtSeln MSR. Don't drop the high nybble when setting up the
config field of a perf_event_attr structure for a call to
perf_event_create_kernel_counter().

Fixes: ca724305 ("KVM: x86/vPMU: Implement AMD vPMU code for KVM")
Reported-by: default avatarStephane Eranian <eranian@google.com>
Signed-off-by: default avatarJim Mattson <jmattson@google.com>
Message-Id: <20220203014813.2130559-1-jmattson@google.com>
Reviewed-by: default avatarDavid Dunn <daviddunn@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarYu Liao <liaoyu15@huawei.com>
Reviewed-by: default avatarWei Li <liwei391@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 672682cc
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