Date: Fri, 11 Apr 2014 18:19:21 +0000 (UTC) From: Tycho Nightingale <tychon@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r264347 - head/sys/amd64/vmm Message-ID: <201404111819.s3BIJLJ2075894@svn.freebsd.org>
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Author: tychon Date: Fri Apr 11 18:19:21 2014 New Revision: 264347 URL: http://svnweb.freebsd.org/changeset/base/264347 Log: Account for the "plus 1" encoding of the CPUID Function 4 reported core per package and cache sharing values. Approved by: grehan (co-mentor) Modified: head/sys/amd64/vmm/x86.c Modified: head/sys/amd64/vmm/x86.c ============================================================================== --- head/sys/amd64/vmm/x86.c Fri Apr 11 16:55:25 2014 (r264346) +++ head/sys/amd64/vmm/x86.c Fri Apr 11 18:19:21 2014 (r264347) @@ -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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