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Re: [Xen-devel] [linux-linus bisection] complete test-amd64-amd64-qemuu-nested-intel
- To: osstest service owner <osstest-admin@xxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Fri, 13 Mar 2020 16:03:27 +0000
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- Cc: Kevin Tian <kevin.tian@xxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Delivery-date: Fri, 13 Mar 2020 16:03:40 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 12/03/2020 23:56, osstest service owner wrote:
> branch xen-unstable
> xenbranch xen-unstable
> job test-amd64-amd64-qemuu-nested-intel
> testid debian-hvm-install/l1/l2
>
> Tree: linux
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
> Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
> Tree: ovmf git://xenbits.xen.org/osstest/ovmf.git
> Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git
> Tree: qemuu git://xenbits.xen.org/qemu-xen.git
> Tree: seabios git://xenbits.xen.org/osstest/seabios.git
> Tree: xen git://xenbits.xen.org/xen.git
>
> *** Found and reproduced problem changeset ***
>
> Bug is in tree: xen git://xenbits.xen.org/xen.git
> Bug introduced: f96e1469ad06b61796c60193daaeb9f8a96d7458
> Bug not present: 0729830cc425a8ff27a3137e87b93768ae3c853c
> Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/148496/
>
>
> commit f96e1469ad06b61796c60193daaeb9f8a96d7458
> Author: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> Date: Wed Feb 5 13:49:09 2020 +0100
>
> x86/vvmx: fix virtual interrupt injection when Ack on exit control is
> used
>
> When doing a virtual vmexit (ie: a vmexit handled by the L1 VMM)
> interrupts shouldn't be injected using the virtual interrupt delivery
> mechanism unless the Ack on exit vmexit control bit isn't set in the
> nested vmcs.
>
> Gate the call to nvmx_update_apicv helper on whether the nested vmcs
> has the Ack on exit bit set in the vmexit control field.
>
> Note that this fixes the usage of x2APIC by the L1 VMM, at least when
> the L1 VMM is Xen.
>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Looks like there are further problems here. I'm afraid I haven't
investigated further, but this also might be the source of the
intermittent problems in staging.
~Andrew
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