Messages in this thread | | | Date | Wed, 8 Dec 2021 14:57:31 +0100 | Subject | Re: Rewording of Setting IA32_XFD[18] (Re: Thoughts of AMX KVM support based on latest kernel) | From | Paolo Bonzini <> |
| |
On 12/8/21 01:50, Nakajima, Jun wrote: > 3.3 RECOMMENDATIONS FOR SYSTEM SOFTWARE > > System software may disable use of Intel AMX by clearing XCR0[18:17], > by clearing CR4.OSXSAVE, or by setting IA32_XFD[18]. System software > should initialize AMX state (e.g., by executing TILERELEASE) when > doing so because maintaining AMX state in a non-initialized state may > have negative power and performance implications. In addition, > software should not rely on the state of the tile data after setting
I would change this to "must not rely", otherwise looks good. Thanks!
Paolo
> IA32_XFD[18]; software should always reload or reinitialize the tile > data after clearing IA32_XFD[18].
| |