arm64: cpufeature: Detect HCR_EL2.NV1 being RES0
A variant of FEAT_E2H0 not being implemented exists in the form of HCR_EL2.E2H being RES1 *and* HCR_EL2.NV1 being RES0 (indicating that only VHE is supported on the host and nested guests). Add the necessary infrastructure for this new CPU capability. Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20240122181344.258974-7-maz@kernel.orgSigned-off-by: Oliver Upton <oliver.upton@linux.dev>
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