[Xen-devel] [PATCH] svm: support VMCB cleanbits

[Christoph Egger <Christoph.Egger@xxxxxxx>]

Hi,

Attached patch implements the VMCB cleanbits   SVM feature.
Upcoming AMD CPUs introduce them and they are basically hints
for the CPU which vmcb values can be re-used from the previous
VMRUN instruction.

Each bit represents a certain set of fields in the VMCB.
Setting a bit tells the cpu it can re-use the cached value
from the previous VMRUN.
Clearing a bit tells the cpu to reload the values from the given VMCB.

Signed-off-by: Wei Huang <Wei.Huang2@xxxxxxx>
Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>

Christoph


-- 
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach b. Muenchen
Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632

Attachment: xen_vmcbcleanbits.diff
Description: xen_vmcbcleanbits.diff

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