From: Jan Beulich <jbeulich@suse.com>
To: Paul Leiber <paul@onlineschubla.de>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Subject: Re: [BUG] Passed through PCI devices lost after Windows HVM DomU reboot
Date: Tue, 8 Jun 2021 08:24:16 +0200 [thread overview]
Message-ID: <5f532ea4-4ff4-e163-9492-096d16a316e7@suse.com> (raw)
In-Reply-To: <FRYP281MB05828EB0C49C963C7954578CB0389@FRYP281MB0582.DEUP281.PROD.OUTLOOK.COM>
On 08.06.2021 01:44, Paul Leiber wrote:
> After more testing, I have come to the following conclusion: It seems that every time I do a _reboot_ from within a Windows DomU, the PCI device does not get attached to the DomU. After DomU reboot, it is immediately available for attachment in the Dom0 when I check for it with "xl pci-assignable-list", and I can reattach it to the DomU with "xl pci-attach" without any major problems beside some annoying side effects (e. g. need to reapply settings).
A well-known problem on ...
> xl info:
>
> host : xxx
> release : 4.19.0-14-amd64
> version : #1 SMP Debian 4.19.171-2 (2021-01-30)
> machine : x86_64
> nr_cpus : 4
> max_cpu_id : 3
> nr_nodes : 1
> cores_per_socket : 4
> threads_per_core : 1
> cpu_mhz : 1992.100
> hw_caps : bfebfbff:77faf3ff:2c100800:00000121:0000000f:009c6fbf:00000000:00000100
> virt_caps : hvm hvm_directio
> total_memory : 32542
> free_memory : 20836
> sharing_freed_memory : 0
> sharing_used_memory : 0
> outstanding_claims : 0
> free_cpus : 0
> xen_major : 4
> xen_minor : 11
> xen_extra : .4
> xen_version : 4.11.4
... this old Xen version, I believe. I don't recall when exactly it was
fixed (and I don't know at all whether the fix was backported), but
trying a recent version of Xen should get you past this. If a fully
maintained version is still affected, a backport could be requested.
Jan
next prev parent reply other threads:[~2021-06-08 6:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 23:44 [BUG] Passed through PCI devices lost after Windows HVM DomU reboot Paul Leiber
2021-06-08 6:24 ` Jan Beulich [this message]
2021-06-08 15:13 ` AW: " Paul Leiber
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