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From: Oliver Upton <oliver.upton@linux.dev>
To: Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.linux.dev, kvm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Zenghui Yu <yuzenghui@huawei.com>, Will Deacon <will@kernel.org>
Subject: Re: [PATCH v2 4/5] KVM: arm64: vhe: Synchronise with page table
 walker on MMU update
Message-ID: <ZDdIp3j1r5ym4nb4@linux.dev>
References: <20230408160427.10672-1-maz@kernel.org>
 <20230408160427.10672-5-maz@kernel.org>
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On Sat, Apr 08, 2023 at 05:04:26PM +0100, Marc Zyngier wrote:
> Contrary to nVHE, VHE is a lot easier when it comes to dealing
> with speculative page table walks started at EL1. As we only change
> EL1&0 translation regime when context-switching, we already benefit
> from the effect of the DSB that sits in the context switch code.
> 
> We only need to take care of it in the NV case, where we can
> flip between between two EL1 contexts (one of them being the virtual
> EL2) without a context switch.
> 
> Signed-off-by: Marc Zyngier <maz@kernel.org>

Reviewed-by: Oliver Upton <oliver.upton@linux.dev>

-- 
Thanks,
Oliver