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Re: [Qemu-devel] [Xen-devel] [PATCH 5/6] xen-pt: Hide MSI-X from xen stu
From: |
Marek Marczykowski-Górecki |
Subject: |
Re: [Qemu-devel] [Xen-devel] [PATCH 5/6] xen-pt: Hide MSI-X from xen stubdoms |
Date: |
Tue, 12 Mar 2019 13:38:08 +0100 |
User-agent: |
Mutt/1.11.1+94 (9b965fac) (2019-01-05) |
On Tue, Mar 12, 2019 at 01:04:19PM +0100, Roger Pau Monné wrote:
> On Mon, Mar 11, 2019 at 02:02:15PM -0400, Jason Andryuk wrote:
> > MSI-X is not supported in Xen stubdoms, so it must be disabled. Use the
> > existing xen_pt_hide_dev_cap to hide when running under -xen-stubdom.
>
> I'm afraid this requires some more context. What's the actual issue
> that prevents MSI-X from working?
At least missing "Fix PCI passthrough for HVM with stubdomain" series,
but that's mostly on Xen side (+ one change how QEMU enable MSI-X in
config space).
Some of it can be worked around by enabling permissive mode. Jason, did
you had a chance to test it with any MSI-X device?
I'm not aware of anything thing particular that breaks MSI-X but not
MSI. Besides much less devices lying around to test MSI-X...
--
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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[Qemu-devel] [PATCH 4/6] xen: Set HVM_PARAM_DM_DOMAIN for stubdom on older Xen, Jason Andryuk, 2019/03/11
[Qemu-devel] [PATCH 2/6] xen: Move xenstore initialization to common location, Jason Andryuk, 2019/03/11