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Date: Mon, 14 Sep 2015 16:46:28 +0100
From: Marc Zyngier <marc.zyngier@arm.com>
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To: Will Deacon <will.deacon@arm.com>, kvmarm@lists.cs.columbia.edu
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Subject: Re: [PATCH] KVM: arm64: add workaround for Cortex-A57 erratum #852523
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On 14/09/15 16:06, Will Deacon wrote:
> When restoring the system register state for an AArch32 guest at EL2,
> writes to DACR32_EL2 may not be correctly synchronised by Cortex-A57,
> which can lead to the guest effectively running with junk in the DACR
> and running into unexpected domain faults.
> 
> This patch works around the issue by re-ordering our restoration of the
> AArch32 register aliases so that they happen before the AArch64 system
> registers. Ensuring that the registers are restored in this order
> guarantees that they will be correctly synchronised by the core.
> 
> Cc: <stable@vger.kernel.org>
> Cc: Marc Zyngier <marc.zyngier@arm.com>
> Signed-off-by: Will Deacon <will.deacon@arm.com>

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>

I'll queue that together with the next batch of fixes.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...