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Commit c39cbd2a authored by Avi Kivity's avatar Avi Kivity
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KVM: Document that KVM_GET_SUPPORTED_CPUID may return emulated values 



Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 4c62a2dc

Documentation/kvm/api.txt

+3 −2
Original line number Original line Diff line number Diff line
@@ -1042,8 +1042,9 @@ number is just right, the 'nent' field is adjusted to the number of valid 
entries in the 'entries' array, which is then filled.

entries in the 'entries' array, which is then filled.





The entries returned are the host cpuid as returned by the cpuid instruction,

The entries returned are the host cpuid as returned by the cpuid instruction,

with unknown or unsupported features masked out.  The fields in each entry

with unknown or unsupported features masked out.  Some features (for example,

are defined as follows:

x2apic), may not be present in the host cpu, but are exposed by kvm if it can

emulate them efficiently. The fields in each entry are defined as follows:





  function: the eax value used to obtain the entry

  function: the eax value used to obtain the entry

  index: the ecx value used to obtain the entry (for entries that are

  index: the ecx value used to obtain the entry (for entries that are