On 13.03.2025 10:48, Roger Pau Monné wrote: > 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 <jiqian.c...@amd.com> >>>>> --- >>>>> 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).
I'd prefer if we made this explicit, yes. > In any case we should likely wait for: > > https://lore.kernel.org/xen-devel/20250308001711.18746-1-jason.andr...@amd.com/ > > To be committed? Sure - they're in now. Jan
