From: Christoffer Dall <christoffer.dall@linaro.org>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: "kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
KVM devel mailing list <kvm@vger.kernel.org>,
Laszlo Ersek <lersek@redhat.com>, Drew Jones <drjones@redhat.com>,
Wei Huang <wei@redhat.com>,
Peter Maydell <peter.maydell@linaro.org>
Subject: Re: [PATCH 9/9] arm/arm64: KVM: arch timer: Reset CNTV_CTL to 0
Date: Mon, 31 Aug 2015 10:57:52 +0200 [thread overview]
Message-ID: <20150831085752.GH24113@cbox> (raw)
In-Reply-To: <CAKv+Gu-4KKUUt7J==CPK6J79mWXLeMJFsG_fj85tYB2orzfrZg@mail.gmail.com>
On Mon, Aug 31, 2015 at 10:46:59AM +0200, Ard Biesheuvel wrote:
> On 30 August 2015 at 15:54, Christoffer Dall
> <christoffer.dall@linaro.org> wrote:
> > Provide a better quality of implementation and be architecture compliant
> > on ARMv7 for the architected timer by resetting the CNTV_CTL to 0 on
> > reset of the timer, and call kvm_timer_update_state(vcpu) at the same
> > time, ensuring the timer output is not asserted after, for example, a
> > PSCI system reset.
> >
> > This change alone fixes the UEFI reset issue reported by Laszlo back in
> > February.
> >
>
> Do you have a link to that report? I can't quite remember the details ...
>
There was no public mailing list cc'ed on the report, and the bugzilla
bug was created in a non-public Red Hat instance.
But you were cc'ed on the original mail from Laszlo. Look for an e-mail
from February 5th with the subject "virtual timer interrupt stuck across
guest firmware reboot on KVM".
-Christoffer
WARNING: multiple messages have this Message-ID (diff)
From: christoffer.dall@linaro.org (Christoffer Dall)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 9/9] arm/arm64: KVM: arch timer: Reset CNTV_CTL to 0
Date: Mon, 31 Aug 2015 10:57:52 +0200 [thread overview]
Message-ID: <20150831085752.GH24113@cbox> (raw)
In-Reply-To: <CAKv+Gu-4KKUUt7J==CPK6J79mWXLeMJFsG_fj85tYB2orzfrZg@mail.gmail.com>
On Mon, Aug 31, 2015 at 10:46:59AM +0200, Ard Biesheuvel wrote:
> On 30 August 2015 at 15:54, Christoffer Dall
> <christoffer.dall@linaro.org> wrote:
> > Provide a better quality of implementation and be architecture compliant
> > on ARMv7 for the architected timer by resetting the CNTV_CTL to 0 on
> > reset of the timer, and call kvm_timer_update_state(vcpu) at the same
> > time, ensuring the timer output is not asserted after, for example, a
> > PSCI system reset.
> >
> > This change alone fixes the UEFI reset issue reported by Laszlo back in
> > February.
> >
>
> Do you have a link to that report? I can't quite remember the details ...
>
There was no public mailing list cc'ed on the report, and the bugzilla
bug was created in a non-public Red Hat instance.
But you were cc'ed on the original mail from Laszlo. Look for an e-mail
from February 5th with the subject "virtual timer interrupt stuck across
guest firmware reboot on KVM".
-Christoffer
next prev parent reply other threads:[~2015-08-31 8:57 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-30 13:54 [PATCH 0/9] Rework architected timer and fix UEFI reset Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-08-30 13:54 ` [PATCH 1/9] KVM: Add kvm_arch_vcpu_{un}blocking callbacks Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-09-03 14:21 ` Marc Zyngier
2015-09-03 14:21 ` Marc Zyngier
2015-09-04 13:50 ` Eric Auger
2015-09-04 13:50 ` Eric Auger
2015-09-04 14:50 ` Christoffer Dall
2015-09-04 14:50 ` Christoffer Dall
2015-08-30 13:54 ` [PATCH 2/9] arm/arm64: KVM: arch_timer: Only schedule soft timer on vcpu_block Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-09-03 14:43 ` Marc Zyngier
2015-09-03 14:43 ` Marc Zyngier
2015-09-03 14:58 ` Christoffer Dall
2015-09-03 14:58 ` Christoffer Dall
2015-09-03 15:53 ` Marc Zyngier
2015-09-03 15:53 ` Marc Zyngier
2015-09-03 16:09 ` Christoffer Dall
2015-09-03 16:09 ` Christoffer Dall
2015-08-30 13:54 ` [PATCH 3/9] arm/arm64: KVM: vgic: Factor out level irq processing on guest exit Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-09-03 15:01 ` Marc Zyngier
2015-09-03 15:01 ` Marc Zyngier
2015-08-30 13:54 ` [PATCH 4/9] arm/arm64: Implement GICD_ICFGR as RO for PPIs Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-09-03 15:03 ` Marc Zyngier
2015-09-03 15:03 ` Marc Zyngier
2015-08-30 13:54 ` [PATCH 5/9] arm/arm64: KVM: Use appropriate define in VGIC reset code Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-09-03 15:04 ` Marc Zyngier
2015-09-03 15:04 ` Marc Zyngier
2015-09-04 16:08 ` Eric Auger
2015-09-04 16:08 ` Eric Auger
2015-08-30 13:54 ` [PATCH 6/9] arm/arm64: KVM: Add mapped interrupts documentation Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-09-03 15:23 ` Marc Zyngier
2015-09-03 15:23 ` Marc Zyngier
2015-09-03 15:56 ` Eric Auger
2015-09-03 15:56 ` Eric Auger
2015-09-04 15:54 ` Christoffer Dall
2015-09-04 15:54 ` Christoffer Dall
2015-09-04 15:55 ` Christoffer Dall
2015-09-04 15:55 ` Christoffer Dall
2015-09-04 15:57 ` Christoffer Dall
2015-09-04 15:57 ` Christoffer Dall
2015-09-04 15:59 ` Marc Zyngier
2015-09-04 15:59 ` Marc Zyngier
2015-08-30 13:54 ` [PATCH 7/9] arm/arm64: KVM: vgic: Move active state handling to flush_hwstate Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-09-03 15:33 ` Marc Zyngier
2015-09-03 15:33 ` Marc Zyngier
2015-08-30 13:54 ` [PATCH 8/9] arm/arm64: KVM: Rework the arch timer to use level-triggered semantics Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-09-03 17:06 ` Marc Zyngier
2015-09-03 17:06 ` Marc Zyngier
2015-09-03 17:23 ` Christoffer Dall
2015-09-03 17:23 ` Christoffer Dall
2015-09-03 17:29 ` Marc Zyngier
2015-09-03 17:29 ` Marc Zyngier
2015-09-03 22:00 ` Christoffer Dall
2015-09-03 22:00 ` Christoffer Dall
2015-08-30 13:54 ` [PATCH 9/9] arm/arm64: KVM: arch timer: Reset CNTV_CTL to 0 Christoffer Dall
2015-08-30 13:54 ` Christoffer Dall
2015-08-31 8:46 ` Ard Biesheuvel
2015-08-31 8:46 ` Ard Biesheuvel
2015-08-31 8:57 ` Christoffer Dall [this message]
2015-08-31 8:57 ` Christoffer Dall
2015-08-31 9:02 ` Ard Biesheuvel
2015-08-31 9:02 ` Ard Biesheuvel
2015-09-03 17:07 ` Marc Zyngier
2015-09-03 17:07 ` Marc Zyngier
2015-09-03 17:10 ` [PATCH 0/9] Rework architected timer and fix UEFI reset Marc Zyngier
2015-09-03 17:10 ` Marc Zyngier
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