Re: [Xen-devel] [PATCH 2/2] x86/vmx: conditionally disable LBR support due to TSX format quirk

>>> On 10.08.16 at 17:47, wrote: > On Wed, Aug 10, 2016 at 06:34:10AM -0600, Jan Beulich wrote: >> >>> On 10.08.16 at 08:59, wrote: >> > --- a/xen/arch/x86/hvm/vmx/vmx.c >> > +++ b/xen/arch/x86/hvm/vmx/vmx.c >> > @@ -2576,8 +2576,22 @@ static const struct lbr_info

Re: [Xen-devel] [PATCH 2/2] x86/vmx: conditionally disable LBR support due to TSX format quirk

On Wed, Aug 10, 2016 at 06:34:10AM -0600, Jan Beulich wrote: > >>> On 10.08.16 at 08:59, wrote: > > Systems that support LBR formats that include TSX information but do > > not support TSX require special handling when saving and restoring MSR > > values. For example, see the Linux

Re: [Xen-devel] [PATCH 2/2] x86/vmx: conditionally disable LBR support due to TSX format quirk

>>> On 10.08.16 at 08:59, wrote: > Systems that support LBR formats that include TSX information but do > not support TSX require special handling when saving and restoring MSR > values. For example, see the Linux kernel quirks[1, 2] in the MSR > context switching code. As a wrmsr

[Xen-devel] [PATCH 2/2] x86/vmx: conditionally disable LBR support due to TSX format quirk

From: Matt Wilson Systems that support LBR formats that include TSX information but do not support TSX require special handling when saving and restoring MSR values. For example, see the Linux kernel quirks[1, 2] in the MSR context switching code. As a wrmsr with certain values