KVM: arm64: Do not let a L1 hypervisor access the *32_EL2 sysregs

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DBGVCR32_EL2, DACR32_EL2, IFSR32_EL2 and FPEXC32_EL2 are required to
UNDEF when AArch32 isn't implemented, which is definitely the case when
running NV.

Given that this is the only case where these registers can trap,
unconditionally inject an UNDEF exception.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20231023095444.1587322-5-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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Marc Zyngier 2023-10-23 10:54:43 +01:00 • committed by Oliver Upton

parent 04cf546505

commit c7d11a61c7

1 changed files with 4 additions and 4 deletions

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arch/arm64/kvm/sys_regs.c

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