From: marc.zyngier@arm•com (Marc Zyngier)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH] arm64: KVM: VHE: reset PSTATE.PAN on entry to EL2
Date: Thu, 1 Sep 2016 15:55:29 +0100 [thread overview]
Message-ID: <57C84161.3030607@arm.com> (raw)
In-Reply-To: <1472740143-40061-1-git-send-email-vladimir.murzin@arm.com>
On 01/09/16 15:29, Vladimir Murzin wrote:
> 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")
>
> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm•com>
> Reviewed-by: James Morse <james.morse@arm•com>
Acked-by: Marc Zyngier <marc.zyngier@arm•com>
M.
--
Jazz is not dead. It just smells funny...
prev parent reply other threads:[~2016-09-01 14:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-01 14:29 [PATCH] arm64: KVM: VHE: reset PSTATE.PAN on entry to EL2 Vladimir Murzin
2016-09-01 14:55 ` Marc Zyngier [this message]
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