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| author | Marc Zyngier <maz@kernel.org> | 2025-02-20 13:49:03 +0000 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2025-02-24 11:30:17 -0800 |
| commit | f83c41fb3dddbf47881249335a9718d2cdce0bd0 (patch) | |
| tree | 5b1a7d2a7f8eb268e079ccfad5e35e9df4d73b7c /arch/arm64/include/uapi | |
| parent | KVM: arm64: Move NV-specific capping to idreg sanitisation (diff) | |
| download | linux-f83c41fb3dddbf47881249335a9718d2cdce0bd0.tar.gz linux-f83c41fb3dddbf47881249335a9718d2cdce0bd0.zip | |
KVM: arm64: Allow userspace to limit NV support to nVHE
NV is hard. No kidding.
In order to make things simpler, we have established that NV would
support two mutually exclusive configurations:
- VHE-only, and supporting recursive virtualisation
- nVHE-only, and not supporting recursive virtualisation
For that purpose, introduce a new vcpu feature flag that denotes
the second configuration. We use this flag to limit the idregs
further.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Link: https://lore.kernel.org/r/20250220134907.554085-11-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/include/uapi')
| -rw-r--r-- | arch/arm64/include/uapi/asm/kvm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index 568bf858f319..3bcab2a106c9 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -105,6 +105,7 @@ struct kvm_regs { #define KVM_ARM_VCPU_PTRAUTH_ADDRESS 5 /* VCPU uses address authentication */ #define KVM_ARM_VCPU_PTRAUTH_GENERIC 6 /* VCPU uses generic authentication */ #define KVM_ARM_VCPU_HAS_EL2 7 /* Support nested virtualization */ +#define KVM_ARM_VCPU_HAS_EL2_E2H0 8 /* Limit NV support to E2H RES0 */ struct kvm_vcpu_init { __u32 target; |