Re: [PATCH 2/2] KVM: x86: Expose CLZERO and XSAVEERPTR to the guest

2019-09-26 Thread Paolo Bonzini
On 25/09/19 23:37, Sebastian Andrzej Siewior wrote: > I was surprised to see that the guest reported `fxsave_leak' while the > host did not. After digging deeper I noticed that the bits are simply > masked out during enumeration. > The XSAVEERPTR feature is actually a bug fix on AMD which means the

Re: [PATCH 2/2] KVM: x86: Expose CLZERO and XSAVEERPTR to the guest

2019-09-25 Thread Jim Mattson
On Wed, Sep 25, 2019 at 2:37 PM Sebastian Andrzej Siewior wrote: > > I was surprised to see that the guest reported `fxsave_leak' while the > host did not. After digging deeper I noticed that the bits are simply > masked out during enumeration. > The XSAVEERPTR feature is actually a bug fix on AMD