Author: jhb
Date: Mon Jul 21 18:26:51 2014
New Revision: 268952
URL: http://svnweb.freebsd.org/changeset/base/268952
Log:
MFC 264347:
Account for the "plus 1" encoding of the CPUID Function 4 reported
core per package and cache sharing values.
Modified:
stable/10/sys/amd64/vmm/x86.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/amd64/vmm/x86.c
==============================================================================
--- stable/10/sys/amd64/vmm/x86.c Mon Jul 21 18:23:48 2014
(r268951)
+++ stable/10/sys/amd64/vmm/x86.c Mon Jul 21 18:26:51 2014
(r268952)
@@ -219,9 +219,18 @@ x86_emulate_cpuid(struct vm *vm, int vcp
/*
* 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:
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