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charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <7977cc2d-d654-49be-8bf9-9d3fe9286857@suse.com> On Thu, Mar 13, 2025 at 08:42:25AM +0100, Jan Beulich wrote: > On 12.03.2025 17:36, Roger Pau Monné wrote: > > On Wed, Mar 12, 2025 at 09:51:09AM +0100, Jan Beulich wrote: > >> On 12.03.2025 05:02, Jiqian Chen wrote: > >>> PCI passthrough is already supported for HVM domUs when dom0 is PVH > >>> on x86. The last related patch on Qemu side was merged after Xen4.20 > >>> release. So mention this feature in Xen4.21 entry. > >>> > >>> Signed-off-by: Jiqian Chen > >>> --- > >>> CHANGELOG.md | 1 + > >>> 1 file changed, 1 insertion(+) > >>> > >>> diff --git a/CHANGELOG.md b/CHANGELOG.md > >>> index 7201c484f899..b6de9b72ea7a 100644 > >>> --- a/CHANGELOG.md > >>> +++ b/CHANGELOG.md > >>> @@ -12,6 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) > >>> - On x86: > >>> - Option to attempt to fixup p2m page-faults on PVH dom0. > >>> - Resizable BARs is supported for PVH dom0. > >>> + - Support PCI passthrough for HVM domUs when dom0 is PVH. > >> > >> Aren't we still in need of SR-IOV support in order to make such an > >> unconditional statement? > > > > I view SR-IOV as kind of orthogonal to this: SR-IOV is not > > supported at all on PVH dom0, so it's not just pass through, but the > > capability itself that won't work as expected when using such devices. > > Hmm, yes and no. No in so far as I as someone who simply wants to use Xen > would read the above statement as indicating full pass-through support. > Which first and foremost includes the passing through of VFs. Maybe we can clarify somehow that SR-IOV devices are still not supported on a PVH dom0: - Support PCI passthrough for HVM domUs when dom0 is PVH (note SR-IOV capability usage is not yet supported on PVH dom0). In any case we should likely wait for: https://lore.kernel.org/xen-devel/20250308001711.18746-1-jason.andryuk@amd.com/ To be committed? Thanks, Roger.