Xen devel - Dec 2010 - [PATCH 2/2] xsave: extend xsave/xrstor support to all (64) features

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@amd.com>





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