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Date: Wed, 26 Oct 2016 10:42:59 +0200
From: Greg KH <greg@kroah.com>
To: Vladimir Murzin <vladimir.murzin@arm.com>
Cc: stable@vger.kernel.org, christoffer.dall@linaro.org,
        james.morse@arm.com, marc.zyngier@arm.com
Subject: Re: [PATCH] arm64: KVM: VHE: reset PSTATE.PAN on entry to EL2
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On Fri, Oct 14, 2016 at 03:49:12PM +0100, Vladimir Murzin wrote:
> commit cb96408da4e11698674abd04aeac941c1bed2038 upstream.
> 
> SCTLR_EL2.SPAN bit controls what happens with the PSTATE.PAN bit on an
> exception. However, this bit has no effect on the PSTATE.PAN when
> HCR_EL2.E2H or HCR_EL2.TGE is unset. Thus when VHE is used and
> exception taken from a guest PSTATE.PAN bit left unchanged and we
> continue with a value guest has set.
> 
> To address that always reset PSTATE.PAN on entry from EL1.
> 
> Fixes: 1f364c8c48a0 ("arm64: VHE: Add support for running Linux in EL2 mode")
> 
> [ rebased for v4.7+ ]

Thanks for the rebase!

greg k-h