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So, propagate the guest's APIC_SPIV >>> writes to the hypervisor. >>> >>> Fixes: c822f58a4fab ("x86/apic: Populate .read()/.write() callbacks of Secure AVIC driver") >> >> What is that patch actually fixing? > > Guest doesn't boot without this change. This sounds like something that should be submitted outside of this series, especially since this is an RFC series. Thanks, Tom > >> >> Does it need to go to stable? > > Yes. I will tag stable on this. > >> >> SPIV needs to be masked and unmasked by the guest? >> >> Doesn't seem too earth-shattering to me but what do I know... > > APIC_SPIV has a bit to (soft-)disable the APIC. It starts off disabled > and the kernel has to write to it to enable the APIC. If writes from the > guest are not propagated to KVM, KVM does not deliver interrupts to the > guest since the APIC is disabled as far as it is concerned. > > I will update the commit log with these details. > >> >>> Signed-off-by: Neeraj Upadhyay >> >> verify_tags: WARNING: Sender ["Naveen N Rao (AMD)" ] hasn't signed off on the patch! >> >> When you send someone else's patch, you *must* put you SOB after hers/his. > > I was genuinely unaware of this. Just so I get this right: > - Add just the 'Sob:' for patches from others that I post un-modified > (without a Co-developed-by: tag) > - Add 'Co-developed-by:' if I make any changes to the patch (commit log > included?) > > > Thanks, > Naveen >