Re: [PATCH v2] x86/nSVM: Expose the FlushByASID CPU feature support to L1 guests
Jan Beulich <[email protected]>
| Newsgroups | gmane.comp.emulators.xen.devel |
|---|---|
| Message-ID | <[email protected]> |
On 26.08.2026 20:09, Abdelkareem Abdelsaamad wrote: > Some hypervisors explicitly require FlushByASID capability to function under > nested virtualization; otherwise, they fail to boot or run nested guests, see > see Xen's start_nested_svm and (1) and (2). To ensure functional nested > virtualization support and allow L1 hypervisors to correctly detect this > hardware capability, extend the exposed HVM CPU policy to surface the > FlushByASID CPU feature to the L1 guests when nestedhvm is enabled. > > (1) VMWare (Launchpad Bug #2008583) https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2008583 > (2) https://lore.kernel.org/all/[email protected]/T/#u > > Signed-off-by: Abdelkareem Abdelsaamad <[email protected]> Acked-by: Jan Beulich <[email protected]> For the future: Please send patches To: just the list, with maintainers uniformly on Cc:. Jan