KVM: arm64: PMU: Allow ID_DFR0_EL1.PerfMon to be set from userspace

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Allow userspace to write ID_DFR0_EL1, on the condition that only
the PerfMon field can be altered and be something that is compatible
with what was computed for the AArch64 view of the guest.

Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221113163832.3154370-13-maz@kernel.org

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Marc Zyngier 2022-11-13 16:38:28 +00:00

parent 60e651ff1f

commit d82e0dfdfd

1 changed files with 56 additions and 1 deletions

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arch/arm64/kvm/sys_regs.c

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