Messages in this thread | | | Subject | Re: [PATCH v3 6/9] x86/smpboot: Support parallel startup of secondary CPUs | From | Tom Lendacky <> | Date | Thu, 16 Dec 2021 13:00:11 -0600 |
| |
On 12/16/21 12:24 PM, David Woodhouse wrote: > On Thu, 2021-12-16 at 08:24 -0600, Tom Lendacky wrote: > >> This will break an SEV-ES guest because CPUID will generate a #VC and a >> #VC handler has not been established yet. >> >> I guess for now, you can probably just not enable parallel startup for >> SEV-ES guests. > > OK, thanks. I'll expand it to allow 24 bits of (physical) APIC ID then, > since it's no longer limited to CPUs without X2APIC. Then we can > refrain from doing parallel bringup for SEV-ES guests, as you suggest. > > What precisely is the check I should be using for that?
Calling cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT) will return true for an SEV-ES guest.
Thanks, Tom
>
| |