KVM: arm64: PMU: Restore the host's PMUSERENR_EL0

Browse source

[ Upstream commit 8681f71759 ]

Restore the host's PMUSERENR_EL0 value instead of clearing it,
before returning back to userspace, as the host's EL0 might have
a direct access to PMU registers (some bits of PMUSERENR_EL0 for
might not be zero for the host EL0).

Fixes: 83a7a4d643 ("arm64: perf: Enable PMU counter userspace access for perf event")
Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230603025035.3781797-2-reijiw@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Reiji Watanabe 2023-06-02 19:50:34 -07:00 • committed by Greg Kroah-Hartman

parent c803e91600

commit b36ba84f09

1 changed files with 11 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

13

arch/arm64/kvm/hyp/include/hyp/switch.h

View file