Re: [Xen-devel] [PATCH 1/2] x86: flush high xstate CPUID sub-leaves to zero

2016-06-01 Thread Wei Liu
On Wed, Jun 01, 2016 at 09:05:56AM -0600, Jan Beulich wrote: > In line with other recent changes, these should be fully white listed, > requiring us to zero them until the obtain a meaning we support. > "they obtain ..." > Without XSAVE support, all xstate sub-leaves should be zero. > > Also mo

Re: [Xen-devel] [PATCH 1/2] x86: flush high xstate CPUID sub-leaves to zero

2016-06-01 Thread Andrew Cooper
On 01/06/16 16:05, Jan Beulich wrote: > In line with other recent changes, these should be fully white listed, > requiring us to zero them until the obtain a meaning we support. > > Without XSAVE support, all xstate sub-leaves should be zero. > > Also move away from checking host XSAVE support - we

[Xen-devel] [PATCH 1/2] x86: flush high xstate CPUID sub-leaves to zero

2016-06-01 Thread Jan Beulich
In line with other recent changes, these should be fully white listed, requiring us to zero them until the obtain a meaning we support. Without XSAVE support, all xstate sub-leaves should be zero. Also move away from checking host XSAVE support - we really ought to consider the guest flag for tha