[Xen-devel] [PATCH]: Add support for Intel CPUID Feature mask in Xen

["Ke, Liping" <liping.ke@xxxxxxxxx>]

Hi, all
Some Latest Intel CPU models (CPUID.1.EAX >= 0x00010674) support cupid
mask features. Cpuid feature mask is used to limit the feature flags
reported by CPUID.1.EDX:ECX.

This small patch adds CPUID feature mask support in XEN by adding boot
options in Grub entry as below example:
kernel /boot/xen.gz com1=115200,8n1 console=com1 cpuid_mask_ecx =
0xFFFF7FFF cpuid_mask_edx = 0xFFFFFFFC

For detailed usage information, please refer to the attached document:
cupid_feature_mask.txt.

Thanks& Regards,
Criping

Attachment: cpuid.patch
Description: cpuid.patch

Attachment: cpuid_feature_mask.txt
Description: cpuid_feature_mask.txt

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