KVM: arm64: nv: Forward FEAT_XNX permissions to the shadow stage-2

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Add support for FEAT_XNX to shadow stage-2 MMUs, being careful to only
evaluate XN[0] when the feature is actually exposed to the VM.
Restructure the layering of permissions in the fault handler to assume
pX and uX then restricting based on the guest's stage-2 afterwards.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Link: https://msgid.link/20251124190158.177318-4-oupton@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>

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This commit is contained in:

Oliver Upton 2025-11-24 11:01:45 -08:00

parent 2608563b46

commit d93febe2ed

3 changed files with 57 additions and 8 deletions

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37

arch/arm64/include/asm/kvm_nested.h

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23

arch/arm64/kvm/mmu.c

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5

arch/arm64/kvm/nested.c

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