[Xen-devel] [Patch 0/4] Refining Xsave/Xrestore support

[Haitao Shan <maillists.shan@xxxxxxxxx>]

Hi, Keir,

The following patches refines Xen support for CPU Xsave/Xrestore
support. There are four patches included.
Patch 1/4:
    Cleaning up existing Xsave code in Xen.
        Replace xfeature_low and xfeature_high with a u64 variable
xfeature_mask.
        In structure hvm_vcpu, rename xfeature_mask to xcr0
        Provide EDX:EAX with all bits set to 1 for XSAVE and XRSTOR as spec 
recommends
Patch 2/4:
    Adding Xsave/Xrestore support for PV guests. Feature is exposed
via CPUID. XSETBV is trapped and emulated by Xen (via GP#).
Patch 3/4:
    Expose AVX to guest OSs.
Patch 4/4:
    Adding guest save/restore support when Xsave/Xrestore are available.
        Adding a pair of hypercalls for PV guest
        Adding a new data chunk for HVM guest.

There should already be some effort refining Xsave support in Xen. I
tried to read the related the email thread and incorporated the
comments from former threads.

Could you please have a review? Thanks in advance!

Shan Haitao

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel