Re: [PATCH v2] x86/cpuid: Advertise no-lmsl unilaterally to hvm guests

2021-04-12 Thread Jan Beulich
On 12.04.2021 17:06, Andrew Cooper wrote: > While part of the original AMD64 spec, Long Mode Segment Limit was a feature > not picked up by Intel, and therefore didn't see much adoption in software. > AMD have finally dropped the feature from hardware, and allocated a CPUID bit > to indicate its ab

[PATCH v2] x86/cpuid: Advertise no-lmsl unilaterally to hvm guests

2021-04-12 Thread Andrew Cooper
While part of the original AMD64 spec, Long Mode Segment Limit was a feature not picked up by Intel, and therefore didn't see much adoption in software. AMD have finally dropped the feature from hardware, and allocated a CPUID bit to indicate its absence. Xen has never supported the feature for gu