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/*********************************************************
* Copyright (C) 1998-2008 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation version 2.1 and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
#ifndef _CPUID_INFO_H
#define _CPUID_INFO_H
#define INCLUDE_ALLOW_USERLEVEL
#define INCLUDE_ALLOW_VMMON
#define INCLUDE_ALLOW_VMNIXMOD
#define INCLUDE_ALLOW_VMCORE
#define INCLUDE_ALLOW_VMKERNEL
#define INCLUDE_ALLOW_VMMEXT
#include "includeCheck.h"
#include "vm_basic_asm.h"
#include "x86cpuid.h"
typedef struct CPUID0 {
int numEntries;
char name[16]; // 4 extra bytes to null terminate
} CPUID0;
typedef struct CPUID1 {
uint32 version;
uint32 ebx;
uint32 ecxFeatures;
uint32 edxFeatures;
} CPUID1;
typedef struct CPUID80 {
uint32 numEntries;
uint32 ebx;
uint32 ecx;
uint32 edx;
} CPUID80;
typedef struct CPUID81 {
uint32 eax;
uint32 ebx;
uint32 ecxFeatures;
uint32 edxFeatures;
} CPUID81;
typedef struct CPUIDSummary {
CPUID0 id0;
CPUID1 id1;
CPUIDRegs ida;
CPUID80 id80;
CPUID81 id81;
CPUIDRegs id88, id8a;
} CPUIDSummary;
/*
*----------------------------------------------------------------------
*
* CPUIDSummary_RegsFromCpuid0 --
*
* Fills in the given CPUIDRegs struct with the values from the CPUID0 struct.
*
* Results:
* Returns the CPUIDRegs pointer passed in.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static INLINE CPUIDRegs*
CPUIDSummary_RegsFromCpuid0(CPUID0* id0In,
CPUIDRegs* id0Out)
{
id0Out->eax = id0In->numEntries;
id0Out->ebx = *(uint32 *) (id0In->name + 0);
id0Out->edx = *(uint32 *) (id0In->name + 4);
id0Out->ecx = *(uint32 *) (id0In->name + 8);
return id0Out;
}
/*
*----------------------------------------------------------------------
*
* CPUIDSummary_SafeToUseMC0_CTL --
*
* Determines whether it is safe to write to the MCE control
* register MC0_CTL.
* Known safe: P4, Nahalem, All AMD.
* Known not safe: P6, Core, Core2, Penryn
* Don't know: P2, P3
*
* Results:
* True iff it is known to be safe.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static INLINE Bool
CPUIDSummary_SafeToUseMC0_CTL(CPUIDSummary* cpuidSummary)
{
CPUIDRegs id0;
CPUIDSummary_RegsFromCpuid0(&cpuidSummary->id0, &id0);
return CPUID_IsVendorAMD(&id0) ||
(CPUID_IsVendorIntel(&id0) &&
(CPUID_FAMILY_IS_PENTIUM4(id0.eax) ||
CPUID_UARCH_IS_NEHALEM(cpuidSummary->id1.version)));
}
/* The following two functions return the number of cores per package
and set *numThreadsPerCore to the number of hardware threads per core. */
static INLINE uint32
CPUIDSummary_AMDCoresPerPackage(CPUIDSummary *cpuid,
uint32 *numThreadsPerCore)
{
uint32 version = cpuid->id1.version, numEntries = cpuid->id80.numEntries;
*numThreadsPerCore = 1;
return CPUID_FAMILY_IS_K8STAR(version) && numEntries >= 0x80000008 ?
CPUID_AMDCoresPerPackage(cpuid->id88.ecx) : 1;
}
static INLINE uint32
CPUIDSummary_IntelCoresPerPackage(CPUIDSummary *cpuid,
uint32 *numThreadsPerCore)
{
uint32 numCoresPerPackage;
*numThreadsPerCore = numCoresPerPackage = 1;
/*
* Multi-core processors have the HT feature bit set even if they don't
* support HT. The reported number of HT is the total, not per core.
*/
if (cpuid->id1.edxFeatures & CPUID_FEATURE_COMMON_ID1EDX_HT) {
*numThreadsPerCore = CPUID_LCPU_COUNT(cpuid->id1.ebx);
if (cpuid->id0.numEntries >= 4) {
numCoresPerPackage =
CPUID_IntelCoresPerPackage(__GET_EAX_FROM_CPUID4(0));
#ifdef ASSERT
ASSERT(*numThreadsPerCore % numCoresPerPackage == 0);
#endif
*numThreadsPerCore /= numCoresPerPackage;
}
}
return numCoresPerPackage;
}
#endif
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