Subject: [PATCH] KVM: arm64: add workaround for Cortex-A57 erratum #852523

From: [email-masked] (Marc Zyngier)
Date: Mon, 14 Sep 2015 16:46:28 +0100

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: <[email-masked]>
> Cc: Marc Zyngier <[email-masked]>
> Signed-off-by: Will Deacon <[email-masked]>

Reviewed-by: Marc Zyngier <[email-masked]>

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

Thanks,

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