Messages in this thread | | | From | Oliver Upton <> | Subject | Re: [PATCH 0/4] KVM: arm64: Fix CPU resume/on with pKVM | Date | Mon, 6 Feb 2023 17:12:59 +0000 |
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On Wed, 1 Feb 2023 10:37:50 +0000, Quentin Perret wrote: > When using pKVM, we do not reset the EL2 exception vectors back to the > stubs for e.g. Power Management or CPU hotplug as we normally do in KVM. > As consequence, the initialisation perfomed by __finalise_el2 is missing > on e.g. the CPU_RESUME path with pKVM, hence leaving certain registers > in an incorrect state. > > One such example is ZCR_EL2 which remains configured with SVE traps > enabled. And so using SVE on a CPU that has gone through a hotplug > off/on cycle leads to a hyp panic. Not good. > > [...]
Applied to kvmarm/next, thanks!
[1/4] KVM: arm64: Provide sanitized SYS_ID_AA64SMFR0_EL1 to nVHE https://git.kernel.org/kvmarm/kvmarm/c/8669651ce0d9 [2/4] KVM: arm64: Introduce finalise_el2_state macro https://git.kernel.org/kvmarm/kvmarm/c/e2d4f5ae1771 [3/4] KVM: arm64: Use sanitized values in __check_override in nVHE https://git.kernel.org/kvmarm/kvmarm/c/3c4cc31537ec [4/4] KVM: arm64: Finalise EL2 state from pKVM PSCI relay https://git.kernel.org/kvmarm/kvmarm/c/6f10f2ec61c7
-- Best, Oliver
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