diff options
| -rw-r--r-- | sys/amd64/vmm/x86.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/sys/amd64/vmm/x86.c b/sys/amd64/vmm/x86.c index e81b43e..ef1557f 100644 --- a/sys/amd64/vmm/x86.c +++ b/sys/amd64/vmm/x86.c @@ -219,9 +219,18 @@ x86_emulate_cpuid(struct vm *vm, int vcpu_id, /* * Do not expose topology. + * + * The maximum number of processor cores in + * this physical processor package and the + * maximum number of threads sharing this + * cache are encoded with "plus 1" encoding. + * Adding one to the value in this register + * field to obtains the actual value. + * + * Therefore 0 for both indicates 1 core per + * package and no cache sharing. */ regs[0] &= 0xffff8000; - regs[0] |= 0x04008000; break; case CPUID_0000_0007: |
