freebsd-dev/sys/dev/hwpmc/hwpmc_intel.c
Jeff Roberson 597979c4b7 - Add support for nehalem/corei7 cpus. This supports all of the core
counters defined in the reference manual.  It does not support the
   'uncore' events.

Reviewed by:	jkoshy
Sponsored by:	Nokia
2009-01-27 07:29:37 +00:00

271 lines
6.3 KiB
C

/*-
* Copyright (c) 2008 Joseph Koshy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Common code for handling Intel CPUs.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/pmc.h>
#include <sys/pmckern.h>
#include <sys/systm.h>
#include <machine/cpu.h>
#include <machine/cputypes.h>
#include <machine/md_var.h>
#include <machine/specialreg.h>
static int
intel_switch_in(struct pmc_cpu *pc, struct pmc_process *pp)
{
(void) pc;
PMCDBG(MDP,SWI,1, "pc=%p pp=%p enable-msr=%d", pc, pp,
pp->pp_flags & PMC_PP_ENABLE_MSR_ACCESS);
/* allow the RDPMC instruction if needed */
if (pp->pp_flags & PMC_PP_ENABLE_MSR_ACCESS)
load_cr4(rcr4() | CR4_PCE);
PMCDBG(MDP,SWI,1, "cr4=0x%jx", (uintmax_t) rcr4());
return 0;
}
static int
intel_switch_out(struct pmc_cpu *pc, struct pmc_process *pp)
{
(void) pc;
(void) pp; /* can be NULL */
PMCDBG(MDP,SWO,1, "pc=%p pp=%p cr4=0x%jx", pc, pp,
(uintmax_t) rcr4());
/* always turn off the RDPMC instruction */
load_cr4(rcr4() & ~CR4_PCE);
return 0;
}
struct pmc_mdep *
pmc_intel_initialize(void)
{
struct pmc_mdep *pmc_mdep;
enum pmc_cputype cputype;
int error, model, nclasses, ncpus;
KASSERT(cpu_vendor_id == CPU_VENDOR_INTEL,
("[intel,%d] Initializing non-intel processor", __LINE__));
PMCDBG(MDP,INI,0, "intel-initialize cpuid=0x%x", cpu_id);
cputype = -1;
nclasses = 2;
model = ((cpu_id & 0xF0000) >> 12) | ((cpu_id & 0xF0) >> 4);
switch (cpu_id & 0xF00) {
#if defined(__i386__)
case 0x500: /* Pentium family processors */
cputype = PMC_CPU_INTEL_P5;
break;
#endif
case 0x600: /* Pentium Pro, Celeron, Pentium II & III */
switch (model) {
#if defined(__i386__)
case 0x1:
cputype = PMC_CPU_INTEL_P6;
break;
case 0x3: case 0x5:
cputype = PMC_CPU_INTEL_PII;
break;
case 0x6: case 0x16:
cputype = PMC_CPU_INTEL_CL;
break;
case 0x7: case 0x8: case 0xA: case 0xB:
cputype = PMC_CPU_INTEL_PIII;
break;
case 0x9: case 0xD:
cputype = PMC_CPU_INTEL_PM;
break;
#endif
case 0xE:
cputype = PMC_CPU_INTEL_CORE;
break;
case 0xF:
cputype = PMC_CPU_INTEL_CORE2;
nclasses = 3;
break;
case 0x17:
cputype = PMC_CPU_INTEL_CORE2EXTREME;
nclasses = 3;
break;
case 0x1C: /* Per Intel document 320047-002. */
cputype = PMC_CPU_INTEL_ATOM;
nclasses = 3;
break;
case 0x1A:
cputype = PMC_CPU_INTEL_COREI7;
nclasses = 3;
break;
}
break;
#if defined(__i386__) || defined(__amd64__)
case 0xF00: /* P4 */
if (model >= 0 && model <= 6) /* known models */
cputype = PMC_CPU_INTEL_PIV;
break;
}
#endif
if ((int) cputype == -1) {
printf("pmc: Unknown Intel CPU.\n");
return (NULL);
}
pmc_mdep = malloc(sizeof(struct pmc_mdep) + nclasses *
sizeof(struct pmc_classdep), M_PMC, M_WAITOK|M_ZERO);
pmc_mdep->pmd_cputype = cputype;
pmc_mdep->pmd_nclass = nclasses;
pmc_mdep->pmd_switch_in = intel_switch_in;
pmc_mdep->pmd_switch_out = intel_switch_out;
ncpus = pmc_cpu_max();
error = pmc_tsc_initialize(pmc_mdep, ncpus);
if (error)
goto error;
switch (cputype) {
#if defined(__i386__) || defined(__amd64__)
/*
* Intel Core, Core 2 and Atom processors.
*/
case PMC_CPU_INTEL_ATOM:
case PMC_CPU_INTEL_CORE:
case PMC_CPU_INTEL_CORE2:
case PMC_CPU_INTEL_CORE2EXTREME:
case PMC_CPU_INTEL_COREI7:
error = pmc_core_initialize(pmc_mdep, ncpus);
break;
/*
* Intel Pentium 4 Processors, and P4/EMT64 processors.
*/
case PMC_CPU_INTEL_PIV:
error = pmc_p4_initialize(pmc_mdep, ncpus);
KASSERT(pmc_mdep->pmd_npmc == TSC_NPMCS + P4_NPMCS,
("[intel,%d] incorrect npmc count %d", __LINE__,
pmc_mdep->pmd_npmc));
break;
#endif
#if defined(__i386__)
/*
* P6 Family Processors
*/
case PMC_CPU_INTEL_P6:
case PMC_CPU_INTEL_CL:
case PMC_CPU_INTEL_PII:
case PMC_CPU_INTEL_PIII:
case PMC_CPU_INTEL_PM:
error = pmc_p6_initialize(pmc_mdep, ncpus);
KASSERT(pmc_mdep->pmd_npmc == TSC_NPMCS + P6_NPMCS,
("[intel,%d] incorrect npmc count %d", __LINE__,
pmc_mdep->pmd_npmc));
break;
/*
* Intel Pentium PMCs.
*/
case PMC_CPU_INTEL_P5:
error = pmc_p5_initialize(pmc_mdep, ncpus);
KASSERT(pmc_mdep->pmd_npmc == TSC_NPMCS + PENTIUM_NPMCS,
("[intel,%d] incorrect npmc count %d", __LINE__,
pmc_mdep->pmd_npmc));
break;
#endif
default:
KASSERT(0, ("[intel,%d] Unknown CPU type", __LINE__));
}
error:
if (error) {
free(pmc_mdep, M_PMC);
pmc_mdep = NULL;
}
return (pmc_mdep);
}
void
pmc_intel_finalize(struct pmc_mdep *md)
{
pmc_tsc_finalize(md);
switch (md->pmd_cputype) {
#if defined(__i386__) || defined(__amd64__)
case PMC_CPU_INTEL_ATOM:
case PMC_CPU_INTEL_CORE:
case PMC_CPU_INTEL_CORE2:
case PMC_CPU_INTEL_CORE2EXTREME:
pmc_core_finalize(md);
break;
case PMC_CPU_INTEL_PIV:
pmc_p4_finalize(md);
break;
#endif
#if defined(__i386__)
case PMC_CPU_INTEL_P6:
case PMC_CPU_INTEL_CL:
case PMC_CPU_INTEL_PII:
case PMC_CPU_INTEL_PIII:
case PMC_CPU_INTEL_PM:
pmc_p6_finalize(md);
break;
case PMC_CPU_INTEL_P5:
pmc_p5_finalize(md);
break;
#endif
default:
KASSERT(0, ("[intel,%d] unknown CPU type", __LINE__));
}
}