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[Xen-devel] [PATCH 2/2] xsave: extend xsave/xrstor support to all (64) f
| To: | "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx>, <keir@xxxxxxx>, "Shan, Haitao" <haitao.shan@xxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH 2/2] xsave: extend xsave/xrstor support to all (64) features |
| From: | Wei Huang <wei.huang2@xxxxxxx> |
| Date: | Wed, 22 Dec 2010 15:01:23 -0600 |
| Cc: | |
| Delivery-date: | Wed, 22 Dec 2010 13:04:31 -0800 |
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This patch supports xsave (CPUID:0x0000000D) enumeration for all
sub-leaves. In specific, it fixes the following issues:
1. The sub-leaves of CPUID:0x0000000D aren't contiguous. Hypervisor shouldn't use register values to stop the enumeration. This patch moves checking on XSAVE sub-leaves out of if-else statement. It also bumps up sub-leaves to 63. 2. It creates a common function for xsave.3. The main leaf 0 of CPUID:0x0000000D in current Xen is broken, especially ECX and EBX registers. This patch cleans it up. 4. It adds support to detects EBX value of CPUID:0x0000000D main leaf 0 on-the-fly. Signed-off-by: Wei Huang2 <wei.huang2@xxxxxxx>
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