mirror_ubuntu-kernels/arch/arm64/kvm/hyp/include
Oliver Upton 74158a8cad KVM: arm64: Skip instruction after emulating write to TCR_EL1
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>
2023-07-28 17:11:23 +00:00
..
hyp KVM: arm64: Skip instruction after emulating write to TCR_EL1 2023-07-28 17:11:23 +00:00
nvhe KVM: arm64: Add FF-A helpers to share/unshare memory with secure world 2023-06-01 21:34:51 +00:00