From: "Radim Krčmář" <rkrcmar@redhat.com>
To: Marc Zyngier <marc.zyngier@arm.com>
Cc: kvm@vger.kernel.org,
Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>,
Paolo Bonzini <pbonzini@redhat.com>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] arm64: KVM: VHE: Context switch MDSCR_EL1
Date: Thu, 21 Jul 2016 15:17:20 +0200 [thread overview]
Message-ID: <20160721131720.GA32739@potion> (raw)
In-Reply-To: <1468933014-26966-1-git-send-email-marc.zyngier@arm.com>
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 <Tirumalesh.Chalamarla@cavium.com>
> Tested-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> ---
I would take this patch to 4.7 directly through the main tree.
Are your plans different?
Thanks.
WARNING: multiple messages have this Message-ID (diff)
From: rkrcmar@redhat.com (Radim Krčmář)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] arm64: KVM: VHE: Context switch MDSCR_EL1
Date: Thu, 21 Jul 2016 15:17:20 +0200 [thread overview]
Message-ID: <20160721131720.GA32739@potion> (raw)
In-Reply-To: <1468933014-26966-1-git-send-email-marc.zyngier@arm.com>
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 at vger.kernel.org #4.6
> Reported-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
> Tested-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> ---
I would take this patch to 4.7 directly through the main tree.
Are your plans different?
Thanks.
next prev parent reply other threads:[~2016-07-21 13:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-19 12:56 [PATCH v2] arm64: KVM: VHE: Context switch MDSCR_EL1 Marc Zyngier
2016-07-19 12:56 ` Marc Zyngier
2016-07-21 13:17 ` Radim Krčmář [this message]
2016-07-21 13:17 ` Radim Krčmář
2016-07-21 13:24 ` Marc Zyngier
2016-07-21 13:24 ` Marc Zyngier
2016-07-21 13:24 ` Marc Zyngier
2016-07-21 13:49 ` Radim Krčmář
2016-07-21 13:49 ` Radim Krčmář
2016-07-21 13:53 ` Marc Zyngier
2016-07-21 13:53 ` Marc Zyngier
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