KVM: arm64: Skip instruction after emulating write to TCR_EL1

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Whelp, this is embarrassing. Since commit 082fdfd138 ("KVM: arm64:
Prevent guests from enabling HA/HD on Ampere1") KVM traps writes to
TCR_EL1 on AmpereOne to work around an erratum in the unadvertised
HAFDBS implementation, preventing the guest from enabling the feature.
Unfortunately, I failed virtualization 101 when working on that change,
and forgot to advance PC after instruction emulation.

Do the right thing and skip the MSR instruction after emulating the
write.

Fixes: 082fdfd138 ("KVM: arm64: Prevent guests from enabling HA/HD on Ampere1")
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230728000824.3848025-1-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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This commit is contained in:

Oliver Upton 2023-07-28 00:08:24 +00:00

parent 01b94b0f39

commit 74158a8cad

1 changed files with 1 additions and 0 deletions

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

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