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0d3b2b4d23
* kvm-arm64/nv-prefix: : Preamble to NV support, courtesy of Marc Zyngier. : : This brings in a set of prerequisite patches for supporting nested : virtualization in KVM/arm64. Of course, there is a long way to go until : NV is actually enabled in KVM. : : - Introduce cpucap / vCPU feature flag to pivot the NV code on : : - Add support for EL2 vCPU register state : : - Basic nested exception handling : : - Hide unsupported features from the ID registers for NV-capable VMs KVM: arm64: nv: Use reg_to_encoding() to get sysreg ID KVM: arm64: nv: Only toggle cache for virtual EL2 when SCTLR_EL2 changes KVM: arm64: nv: Filter out unsupported features from ID regs KVM: arm64: nv: Emulate EL12 register accesses from the virtual EL2 KVM: arm64: nv: Allow a sysreg to be hidden from userspace only KVM: arm64: nv: Emulate PSTATE.M for a guest hypervisor KVM: arm64: nv: Add accessors for SPSR_EL1, ELR_EL1 and VBAR_EL1 from virtual EL2 KVM: arm64: nv: Handle SMCs taken from virtual EL2 KVM: arm64: nv: Handle trapped ERET from virtual EL2 KVM: arm64: nv: Inject HVC exceptions to the virtual EL2 KVM: arm64: nv: Support virtual EL2 exceptions KVM: arm64: nv: Handle HCR_EL2.NV system register traps KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state KVM: arm64: nv: Add EL2 system registers to vcpu context KVM: arm64: nv: Allow userspace to set PSR_MODE_EL2x KVM: arm64: nv: Reset VCPU to EL2 registers if VCPU nested virt is set KVM: arm64: nv: Introduce nested virtualization VCPU feature KVM: arm64: Use the S2 MMU context to iterate over S2 table arm64: Add ARM64_HAS_NESTED_VIRT cpufeature Signed-off-by: Oliver Upton <oliver.upton@linux.dev> |
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