On 05/30/2011 06:01 AM, Yang, Wei Y wrote:
This patch masks CPUID leaf 7 ebx against host capability word9.} break; } + case 7: + /* Mask ebx against host capability word 9 */ + if (index == 0) cpuid_mask(&entry->ebx, 9); + break; + /* function 0xb has additional index. */ case 0xb: { int i, level_type;
It's not just masking leaf 7. It's enabling it - before we passed 0 every time.
So we need to give it the same treatment as other leaves. We expose a bit only if we explicitly support it in kvm, and it is enabled in the host. See kvm_supported_word[01456] features for examples.
btw, we could also expose fsgsbase and rep/movsb (but in a separate patch, please).
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