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[Xen-devel] [PATCH] vmx: add the support of XSAVE/XRSTOR to VMX guest
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] vmx: add the support of XSAVE/XRSTOR to VMX guest |
| From: | "Cui, Dexuan" <dexuan.cui@xxxxxxxxx> |
| Date: | Tue, 29 Sep 2009 17:06:20 +0800 |
| Accept-language: | zh-CN, en-US |
| Acceptlanguage: | zh-CN, en-US |
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| Delivery-date: | Tue, 29 Sep 2009 02:08:10 -0700 |
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| Thread-index: | AclO9qyRbSjwD/1rTCWQHUuOMKlcDAAsP9KQPE32zDA= |
| Thread-topic: | [PATCH] vmx: add the support of XSAVE/XRSTOR to VMX guest |
XSAVE/XRSTOR manages the existing and future processor extended states on x86 architecture. The XSAVE/XRSTOR infrastructure is defined in Intel SDMs: http://www.intel.com/products/processor/manuals/ The patch uses the classical CR0.TS based algorithm to manage the states on context switch. At present, we know 3 bits in the XFEATURE_ENABLED_MASK: FPU, SSE and YMM. YMM is defined in Intel AVX Programming Reference: http://software.intel.com/sites/avx/ One more patch to support hvm guest's save/restore by defining a pair of new HVM_REGISTER_SAVE_RESTORE save/load handlers will be posted later. Thanks, -- Dexuan
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