From mboxrd@z Thu Jan 1 00:00:00 1970 From: Radim =?utf-8?B?S3LEjW3DocWZ?= Subject: Re: [PATCH v2] arm64: KVM: VHE: Context switch MDSCR_EL1 Date: Thu, 21 Jul 2016 15:17:20 +0200 Message-ID: <20160721131720.GA32739@potion> References: <1468933014-26966-1-git-send-email-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, Tirumalesh Chalamarla , Paolo Bonzini , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org To: Marc Zyngier Return-path: Content-Disposition: inline In-Reply-To: <1468933014-26966-1-git-send-email-marc.zyngier@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org 2016-07-19 13:56+0100, Marc Zyngier: > The kprobe enablement work has uncovered that changes made by > a guest to MDSCR_EL1 were propagated to the host when VHE was > enabled, leading to unexpected exception being delivered. > > Moving this register to the list of registers that are always > context-switched fixes the issue. > > Fixes: 9c6c35683286 ("arm64: KVM: VHE: Split save/restore of registers shared between guest and host") > Cc: stable@vger.kernel.org #4.6 > Reported-by: Tirumalesh Chalamarla > Tested-by: Tirumalesh Chalamarla > Signed-off-by: Marc Zyngier > --- I would take this patch to 4.7 directly through the main tree. Are your plans different? Thanks.