From: Oliver Upton <oliver.upton@linux.dev>
To: Marc Zyngier <maz@kernel.org>, Mark Brown <broonie@kernel.org>,
Will Deacon <will@kernel.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Quentin Perret <qperret@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
James Morse <james.morse@arm.com>
Cc: Oliver Upton <oliver.upton@linux.dev>,
kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
kernel-team@android.com, kvmarm@lists.cs.columbia.edu,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/4] KVM: arm64: Fix CPU resume/on with pKVM
Date: Mon, 6 Feb 2023 17:12:59 +0000 [thread overview]
Message-ID: <167570355326.3822888.6416716908821358162.b4-ty@linux.dev> (raw)
In-Reply-To: <20230201103755.1398086-1-qperret@google.com>
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
prev parent reply other threads:[~2023-02-06 17:13 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-01 10:37 Quentin Perret
2023-02-01 10:37 ` [PATCH 1/4] KVM: arm64: Provide sanitized SYS_ID_AA64SMFR0_EL1 to nVHE Quentin Perret
2023-02-01 14:15 ` Mark Brown
2023-02-01 10:37 ` [PATCH 2/4] KVM: arm64: Introduce finalise_el2_state macro Quentin Perret
2023-02-01 14:17 ` Mark Brown
2023-02-01 10:37 ` [PATCH 3/4] KVM: arm64: Use sanitized values in __check_override in nVHE Quentin Perret
2023-02-01 10:37 ` [PATCH 4/4] KVM: arm64: Finalise EL2 state from pKVM PSCI relay Quentin Perret
2023-02-01 14:48 ` [PATCH 0/4] KVM: arm64: Fix CPU resume/on with pKVM Marc Zyngier
2023-02-01 16:57 ` Quentin Perret
2023-02-02 21:43 ` Oliver Upton
2023-02-06 17:12 ` Oliver Upton [this message]
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