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freebsd-nq/sys/dev/hwpmc/hwpmc_uncore.c
Matt Macy e92a1350b5 hwpmc: remove unused pre-table driven bits for intel 
Intel now provides comprehensive tables for all performance counters
and the various valid configuration permutations as text .json files.
Libpmc has been converted to use these and hwpmc_core has been greatly
simplified by moving to passthrough of the table values.

The one gotcha is that said tables don't support pentium pro and and pentium
IV. There's very few users of hwpmc on _amd64_ kernels on new hardware. It is
unlikely that anyone is doing low level optimization on 15 year old Intel
hardware. Nonetheless, if someone feels strongly enough to populate the
corresponding tables for p4 and ppro I will reinstate the files in to the
build.

Code for the K8 counters and !x86 architectures remains unchanged.
2018-05-31 22:41:07 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2010 Fabien Thomas
* 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.
*/
/*
* Intel Uncore PMCs.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/pmc.h>
#include <sys/pmckern.h>
#include <sys/systm.h>
#include <machine/intr_machdep.h>
#if (__FreeBSD_version >= 1100000)
#include <x86/apicvar.h>
#else
#include <machine/apicvar.h>
#endif
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/specialreg.h>
#define UCF_PMC_CAPS \
(PMC_CAP_READ | PMC_CAP_WRITE)
#define UCP_PMC_CAPS \
(PMC_CAP_EDGE | PMC_CAP_THRESHOLD | PMC_CAP_READ | PMC_CAP_WRITE | \
PMC_CAP_INVERT | PMC_CAP_QUALIFIER | PMC_CAP_PRECISE)
#define SELECTSEL(x) \
(((x) == PMC_CPU_INTEL_SANDYBRIDGE || (x) == PMC_CPU_INTEL_HASWELL) ? \
UCP_CB0_EVSEL0 : UCP_EVSEL0)
#define SELECTOFF(x) \
(((x) == PMC_CPU_INTEL_SANDYBRIDGE || (x) == PMC_CPU_INTEL_HASWELL) ? \
UCF_OFFSET_SB : UCF_OFFSET)
static enum pmc_cputype uncore_cputype;
struct uncore_cpu {
volatile uint32_t pc_resync;
volatile uint32_t pc_ucfctrl; /* Fixed function control. */
volatile uint64_t pc_globalctrl; /* Global control register. */
struct pmc_hw pc_uncorepmcs[];
};
static struct uncore_cpu **uncore_pcpu;
static uint64_t uncore_pmcmask;
static int uncore_ucf_ri; /* relative index of fixed counters */
static int uncore_ucf_width;
static int uncore_ucf_npmc;
static int uncore_ucp_width;
static int uncore_ucp_npmc;
static int
uncore_pcpu_noop(struct pmc_mdep *md, int cpu)
{
(void) md;
(void) cpu;
return (0);
}
static int
uncore_pcpu_init(struct pmc_mdep *md, int cpu)
{
struct pmc_cpu *pc;
struct uncore_cpu *cc;
struct pmc_hw *phw;
int uncore_ri, n, npmc;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[ucf,%d] insane cpu number %d", __LINE__, cpu));
PMCDBG1(MDP,INI,1,"uncore-init cpu=%d", cpu);
uncore_ri = md->pmd_classdep[PMC_MDEP_CLASS_INDEX_UCP].pcd_ri;
npmc = md->pmd_classdep[PMC_MDEP_CLASS_INDEX_UCP].pcd_num;
npmc += md->pmd_classdep[PMC_MDEP_CLASS_INDEX_UCF].pcd_num;
cc = malloc(sizeof(struct uncore_cpu) + npmc * sizeof(struct pmc_hw),
M_PMC, M_WAITOK | M_ZERO);
uncore_pcpu[cpu] = cc;
pc = pmc_pcpu[cpu];
KASSERT(pc != NULL && cc != NULL,
("[uncore,%d] NULL per-cpu structures cpu=%d", __LINE__, cpu));
for (n = 0, phw = cc->pc_uncorepmcs; n < npmc; n++, phw++) {
phw->phw_state = PMC_PHW_FLAG_IS_ENABLED |
PMC_PHW_CPU_TO_STATE(cpu) |
PMC_PHW_INDEX_TO_STATE(n + uncore_ri);
phw->phw_pmc = NULL;
pc->pc_hwpmcs[n + uncore_ri] = phw;
}
return (0);
}
static int
uncore_pcpu_fini(struct pmc_mdep *md, int cpu)
{
int uncore_ri, n, npmc;
struct pmc_cpu *pc;
struct uncore_cpu *cc;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] insane cpu number (%d)", __LINE__, cpu));
PMCDBG1(MDP,INI,1,"uncore-pcpu-fini cpu=%d", cpu);
if ((cc = uncore_pcpu[cpu]) == NULL)
return (0);
uncore_pcpu[cpu] = NULL;
pc = pmc_pcpu[cpu];
KASSERT(pc != NULL, ("[uncore,%d] NULL per-cpu %d state", __LINE__,
cpu));
npmc = md->pmd_classdep[PMC_MDEP_CLASS_INDEX_UCP].pcd_num;
uncore_ri = md->pmd_classdep[PMC_MDEP_CLASS_INDEX_UCP].pcd_ri;
for (n = 0; n < npmc; n++)
wrmsr(SELECTSEL(uncore_cputype) + n, 0);
wrmsr(UCF_CTRL, 0);
npmc += md->pmd_classdep[PMC_MDEP_CLASS_INDEX_UCF].pcd_num;
for (n = 0; n < npmc; n++)
pc->pc_hwpmcs[n + uncore_ri] = NULL;
free(cc, M_PMC);
return (0);
}
/*
* Fixed function counters.
*/
static pmc_value_t
ucf_perfctr_value_to_reload_count(pmc_value_t v)
{
v &= (1ULL << uncore_ucf_width) - 1;
return (1ULL << uncore_ucf_width) - v;
}
static pmc_value_t
ucf_reload_count_to_perfctr_value(pmc_value_t rlc)
{
return (1ULL << uncore_ucf_width) - rlc;
}
static int
ucf_allocate_pmc(int cpu, int ri, struct pmc *pm,
const struct pmc_op_pmcallocate *a)
{
enum pmc_event ev;
uint32_t caps, flags;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU %d", __LINE__, cpu));
PMCDBG2(MDP,ALL,1, "ucf-allocate ri=%d reqcaps=0x%x", ri, pm->pm_caps);
if (ri < 0 || ri > uncore_ucf_npmc)
return (EINVAL);
caps = a->pm_caps;
if (a->pm_class != PMC_CLASS_UCF ||
(caps & UCF_PMC_CAPS) != caps)
return (EINVAL);
ev = pm->pm_event;
flags = UCF_EN;
pm->pm_md.pm_ucf.pm_ucf_ctrl = (flags << (ri * 4));
PMCDBG1(MDP,ALL,2, "ucf-allocate config=0x%jx",
(uintmax_t) pm->pm_md.pm_ucf.pm_ucf_ctrl);
return (0);
}
static int
ucf_config_pmc(int cpu, int ri, struct pmc *pm)
{
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucf_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
PMCDBG3(MDP,CFG,1, "ucf-config cpu=%d ri=%d pm=%p", cpu, ri, pm);
KASSERT(uncore_pcpu[cpu] != NULL, ("[uncore,%d] null per-cpu %d", __LINE__,
cpu));
uncore_pcpu[cpu]->pc_uncorepmcs[ri + uncore_ucf_ri].phw_pmc = pm;
return (0);
}
static int
ucf_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc)
{
int error;
struct pmc_hw *phw;
char ucf_name[PMC_NAME_MAX];
phw = &uncore_pcpu[cpu]->pc_uncorepmcs[ri + uncore_ucf_ri];
(void) snprintf(ucf_name, sizeof(ucf_name), "UCF-%d", ri);
if ((error = copystr(ucf_name, pi->pm_name, PMC_NAME_MAX,
NULL)) != 0)
return (error);
pi->pm_class = PMC_CLASS_UCF;
if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) {
pi->pm_enabled = TRUE;
*ppmc = phw->phw_pmc;
} else {
pi->pm_enabled = FALSE;
*ppmc = NULL;
}
return (0);
}
static int
ucf_get_config(int cpu, int ri, struct pmc **ppm)
{
*ppm = uncore_pcpu[cpu]->pc_uncorepmcs[ri + uncore_ucf_ri].phw_pmc;
return (0);
}
static int
ucf_read_pmc(int cpu, int ri, pmc_value_t *v)
{
struct pmc *pm;
pmc_value_t tmp;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal cpu value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucf_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
pm = uncore_pcpu[cpu]->pc_uncorepmcs[ri + uncore_ucf_ri].phw_pmc;
KASSERT(pm,
("[uncore,%d] cpu %d ri %d(%d) pmc not configured", __LINE__, cpu,
ri, ri + uncore_ucf_ri));
tmp = rdmsr(UCF_CTR0 + ri);
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
*v = ucf_perfctr_value_to_reload_count(tmp);
else
*v = tmp;
PMCDBG3(MDP,REA,1, "ucf-read cpu=%d ri=%d -> v=%jx", cpu, ri, *v);
return (0);
}
static int
ucf_release_pmc(int cpu, int ri, struct pmc *pmc)
{
PMCDBG3(MDP,REL,1, "ucf-release cpu=%d ri=%d pm=%p", cpu, ri, pmc);
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucf_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
KASSERT(uncore_pcpu[cpu]->pc_uncorepmcs[ri + uncore_ucf_ri].phw_pmc == NULL,
("[uncore,%d] PHW pmc non-NULL", __LINE__));
return (0);
}
static int
ucf_start_pmc(int cpu, int ri)
{
struct pmc *pm;
struct uncore_cpu *ucfc;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucf_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
PMCDBG2(MDP,STA,1,"ucf-start cpu=%d ri=%d", cpu, ri);
ucfc = uncore_pcpu[cpu];
pm = ucfc->pc_uncorepmcs[ri + uncore_ucf_ri].phw_pmc;
ucfc->pc_ucfctrl |= pm->pm_md.pm_ucf.pm_ucf_ctrl;
wrmsr(UCF_CTRL, ucfc->pc_ucfctrl);
do {
ucfc->pc_resync = 0;
ucfc->pc_globalctrl |= (1ULL << (ri + SELECTOFF(uncore_cputype)));
wrmsr(UC_GLOBAL_CTRL, ucfc->pc_globalctrl);
} while (ucfc->pc_resync != 0);
PMCDBG4(MDP,STA,1,"ucfctrl=%x(%x) globalctrl=%jx(%jx)",
ucfc->pc_ucfctrl, (uint32_t) rdmsr(UCF_CTRL),
ucfc->pc_globalctrl, rdmsr(UC_GLOBAL_CTRL));
return (0);
}
static int
ucf_stop_pmc(int cpu, int ri)
{
uint32_t fc;
struct uncore_cpu *ucfc;
PMCDBG2(MDP,STO,1,"ucf-stop cpu=%d ri=%d", cpu, ri);
ucfc = uncore_pcpu[cpu];
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucf_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
fc = (UCF_MASK << (ri * 4));
ucfc->pc_ucfctrl &= ~fc;
PMCDBG1(MDP,STO,1,"ucf-stop ucfctrl=%x", ucfc->pc_ucfctrl);
wrmsr(UCF_CTRL, ucfc->pc_ucfctrl);
do {
ucfc->pc_resync = 0;
ucfc->pc_globalctrl &= ~(1ULL << (ri + SELECTOFF(uncore_cputype)));
wrmsr(UC_GLOBAL_CTRL, ucfc->pc_globalctrl);
} while (ucfc->pc_resync != 0);
PMCDBG4(MDP,STO,1,"ucfctrl=%x(%x) globalctrl=%jx(%jx)",
ucfc->pc_ucfctrl, (uint32_t) rdmsr(UCF_CTRL),
ucfc->pc_globalctrl, rdmsr(UC_GLOBAL_CTRL));
return (0);
}
static int
ucf_write_pmc(int cpu, int ri, pmc_value_t v)
{
struct uncore_cpu *cc;
struct pmc *pm;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal cpu value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucf_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
cc = uncore_pcpu[cpu];
pm = cc->pc_uncorepmcs[ri + uncore_ucf_ri].phw_pmc;
KASSERT(pm,
("[uncore,%d] cpu %d ri %d pmc not configured", __LINE__, cpu, ri));
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
v = ucf_reload_count_to_perfctr_value(v);
wrmsr(UCF_CTRL, 0); /* Turn off fixed counters */
wrmsr(UCF_CTR0 + ri, v);
wrmsr(UCF_CTRL, cc->pc_ucfctrl);
PMCDBG4(MDP,WRI,1, "ucf-write cpu=%d ri=%d v=%jx ucfctrl=%jx ",
cpu, ri, v, (uintmax_t) rdmsr(UCF_CTRL));
return (0);
}
static void
ucf_initialize(struct pmc_mdep *md, int maxcpu, int npmc, int pmcwidth)
{
struct pmc_classdep *pcd;
KASSERT(md != NULL, ("[ucf,%d] md is NULL", __LINE__));
PMCDBG0(MDP,INI,1, "ucf-initialize");
pcd = &md->pmd_classdep[PMC_MDEP_CLASS_INDEX_UCF];
pcd->pcd_caps = UCF_PMC_CAPS;
pcd->pcd_class = PMC_CLASS_UCF;
pcd->pcd_num = npmc;
pcd->pcd_ri = md->pmd_npmc;
pcd->pcd_width = pmcwidth;
pcd->pcd_allocate_pmc = ucf_allocate_pmc;
pcd->pcd_config_pmc = ucf_config_pmc;
pcd->pcd_describe = ucf_describe;
pcd->pcd_get_config = ucf_get_config;
pcd->pcd_get_msr = NULL;
pcd->pcd_pcpu_fini = uncore_pcpu_noop;
pcd->pcd_pcpu_init = uncore_pcpu_noop;
pcd->pcd_read_pmc = ucf_read_pmc;
pcd->pcd_release_pmc = ucf_release_pmc;
pcd->pcd_start_pmc = ucf_start_pmc;
pcd->pcd_stop_pmc = ucf_stop_pmc;
pcd->pcd_write_pmc = ucf_write_pmc;
md->pmd_npmc += npmc;
}
/*
* Intel programmable PMCs.
*/
/*
* Event descriptor tables.
*
* For each event id, we track:
*
* 1. The CPUs that the event is valid for.
*
* 2. If the event uses a fixed UMASK, the value of the umask field.
* If the event doesn't use a fixed UMASK, a mask of legal bits
* to check against.
*/
struct ucp_event_descr {
enum pmc_event ucp_ev;
unsigned char ucp_evcode;
unsigned char ucp_umask;
unsigned char ucp_flags;
};
#define UCP_F_I7 (1 << 0) /* CPU: Core i7 */
#define UCP_F_WM (1 << 1) /* CPU: Westmere */
#define UCP_F_SB (1 << 2) /* CPU: Sandy Bridge */
#define UCP_F_HW (1 << 3) /* CPU: Haswell */
#define UCP_F_FM (1 << 4) /* Fixed mask */
#define UCP_F_ALLCPUS \
(UCP_F_I7 | UCP_F_WM)
#define UCP_F_CMASK 0xFF000000
static pmc_value_t
ucp_perfctr_value_to_reload_count(pmc_value_t v)
{
v &= (1ULL << uncore_ucp_width) - 1;
return (1ULL << uncore_ucp_width) - v;
}
static pmc_value_t
ucp_reload_count_to_perfctr_value(pmc_value_t rlc)
{
return (1ULL << uncore_ucp_width) - rlc;
}
/*
* Counter specific event information for Sandybridge and Haswell
*/
static int
ucp_event_sb_hw_ok_on_counter(uint8_t ev, int ri)
{
uint32_t mask;
switch (ev) {
/*
* Events valid only on counter 0.
*/
case 0x80:
case 0x83:
mask = (1 << 0);
break;
default:
mask = ~0; /* Any row index is ok. */
}
return (mask & (1 << ri));
}
static int
ucp_allocate_pmc(int cpu, int ri, struct pmc *pm,
const struct pmc_op_pmcallocate *a)
{
uint8_t ev;
uint32_t caps;
const struct pmc_md_ucp_op_pmcallocate *ucp;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucp_npmc,
("[uncore,%d] illegal row-index value %d", __LINE__, ri));
/* check requested capabilities */
caps = a->pm_caps;
if ((UCP_PMC_CAPS & caps) != caps)
return (EPERM);
ucp = &a->pm_md.pm_ucp;
ev = UCP_EVSEL(ucp->pm_ucp_config);
switch (uncore_cputype) {
case PMC_CPU_INTEL_HASWELL:
case PMC_CPU_INTEL_SANDYBRIDGE:
if (ucp_event_sb_hw_ok_on_counter(ev, ri) == 0)
return (EINVAL);
break;
default:
break;
}
pm->pm_md.pm_ucp.pm_ucp_evsel = ucp->pm_ucp_config | UCP_EN;
return (0);
}
static int
ucp_config_pmc(int cpu, int ri, struct pmc *pm)
{
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucp_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
PMCDBG3(MDP,CFG,1, "ucp-config cpu=%d ri=%d pm=%p", cpu, ri, pm);
KASSERT(uncore_pcpu[cpu] != NULL, ("[uncore,%d] null per-cpu %d", __LINE__,
cpu));
uncore_pcpu[cpu]->pc_uncorepmcs[ri].phw_pmc = pm;
return (0);
}
static int
ucp_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc)
{
int error;
struct pmc_hw *phw;
char ucp_name[PMC_NAME_MAX];
phw = &uncore_pcpu[cpu]->pc_uncorepmcs[ri];
(void) snprintf(ucp_name, sizeof(ucp_name), "UCP-%d", ri);
if ((error = copystr(ucp_name, pi->pm_name, PMC_NAME_MAX,
NULL)) != 0)
return (error);
pi->pm_class = PMC_CLASS_UCP;
if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) {
pi->pm_enabled = TRUE;
*ppmc = phw->phw_pmc;
} else {
pi->pm_enabled = FALSE;
*ppmc = NULL;
}
return (0);
}
static int
ucp_get_config(int cpu, int ri, struct pmc **ppm)
{
*ppm = uncore_pcpu[cpu]->pc_uncorepmcs[ri].phw_pmc;
return (0);
}
static int
ucp_read_pmc(int cpu, int ri, pmc_value_t *v)
{
struct pmc *pm;
pmc_value_t tmp;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal cpu value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucp_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
pm = uncore_pcpu[cpu]->pc_uncorepmcs[ri].phw_pmc;
KASSERT(pm,
("[uncore,%d] cpu %d ri %d pmc not configured", __LINE__, cpu,
ri));
tmp = rdmsr(UCP_PMC0 + ri);
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
*v = ucp_perfctr_value_to_reload_count(tmp);
else
*v = tmp;
PMCDBG4(MDP,REA,1, "ucp-read cpu=%d ri=%d msr=0x%x -> v=%jx", cpu, ri,
ri, *v);
return (0);
}
static int
ucp_release_pmc(int cpu, int ri, struct pmc *pm)
{
(void) pm;
PMCDBG3(MDP,REL,1, "ucp-release cpu=%d ri=%d pm=%p", cpu, ri,
pm);
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucp_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
KASSERT(uncore_pcpu[cpu]->pc_uncorepmcs[ri].phw_pmc
== NULL, ("[uncore,%d] PHW pmc non-NULL", __LINE__));
return (0);
}
static int
ucp_start_pmc(int cpu, int ri)
{
struct pmc *pm;
uint32_t evsel;
struct uncore_cpu *cc;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucp_npmc,
("[uncore,%d] illegal row-index %d", __LINE__, ri));
cc = uncore_pcpu[cpu];
pm = cc->pc_uncorepmcs[ri].phw_pmc;
KASSERT(pm,
("[uncore,%d] starting cpu%d,ri%d with no pmc configured",
__LINE__, cpu, ri));
PMCDBG2(MDP,STA,1, "ucp-start cpu=%d ri=%d", cpu, ri);
evsel = pm->pm_md.pm_ucp.pm_ucp_evsel;
PMCDBG4(MDP,STA,2,
"ucp-start/2 cpu=%d ri=%d evselmsr=0x%x evsel=0x%x",
cpu, ri, SELECTSEL(uncore_cputype) + ri, evsel);
/* Event specific configuration. */
switch (pm->pm_event) {
case PMC_EV_UCP_EVENT_0CH_04H_E:
case PMC_EV_UCP_EVENT_0CH_08H_E:
wrmsr(MSR_GQ_SNOOP_MESF,0x2);
break;
case PMC_EV_UCP_EVENT_0CH_04H_F:
case PMC_EV_UCP_EVENT_0CH_08H_F:
wrmsr(MSR_GQ_SNOOP_MESF,0x8);
break;
case PMC_EV_UCP_EVENT_0CH_04H_M:
case PMC_EV_UCP_EVENT_0CH_08H_M:
wrmsr(MSR_GQ_SNOOP_MESF,0x1);
break;
case PMC_EV_UCP_EVENT_0CH_04H_S:
case PMC_EV_UCP_EVENT_0CH_08H_S:
wrmsr(MSR_GQ_SNOOP_MESF,0x4);
break;
default:
break;
}
wrmsr(SELECTSEL(uncore_cputype) + ri, evsel);
do {
cc->pc_resync = 0;
cc->pc_globalctrl |= (1ULL << ri);
wrmsr(UC_GLOBAL_CTRL, cc->pc_globalctrl);
} while (cc->pc_resync != 0);
return (0);
}
static int
ucp_stop_pmc(int cpu, int ri)
{
struct pmc *pm;
struct uncore_cpu *cc;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal cpu value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucp_npmc,
("[uncore,%d] illegal row index %d", __LINE__, ri));
cc = uncore_pcpu[cpu];
pm = cc->pc_uncorepmcs[ri].phw_pmc;
KASSERT(pm,
("[uncore,%d] cpu%d ri%d no configured PMC to stop", __LINE__,
cpu, ri));
PMCDBG2(MDP,STO,1, "ucp-stop cpu=%d ri=%d", cpu, ri);
/* stop hw. */
wrmsr(SELECTSEL(uncore_cputype) + ri, 0);
do {
cc->pc_resync = 0;
cc->pc_globalctrl &= ~(1ULL << ri);
wrmsr(UC_GLOBAL_CTRL, cc->pc_globalctrl);
} while (cc->pc_resync != 0);
return (0);
}
static int
ucp_write_pmc(int cpu, int ri, pmc_value_t v)
{
struct pmc *pm;
struct uncore_cpu *cc;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[uncore,%d] illegal cpu value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < uncore_ucp_npmc,
("[uncore,%d] illegal row index %d", __LINE__, ri));
cc = uncore_pcpu[cpu];
pm = cc->pc_uncorepmcs[ri].phw_pmc;
KASSERT(pm,
("[uncore,%d] cpu%d ri%d no configured PMC to stop", __LINE__,
cpu, ri));
PMCDBG4(MDP,WRI,1, "ucp-write cpu=%d ri=%d msr=0x%x v=%jx", cpu, ri,
UCP_PMC0 + ri, v);
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
v = ucp_reload_count_to_perfctr_value(v);
/*
* Write the new value to the counter. The counter will be in
* a stopped state when the pcd_write() entry point is called.
*/
wrmsr(UCP_PMC0 + ri, v);
return (0);
}
static void
ucp_initialize(struct pmc_mdep *md, int maxcpu, int npmc, int pmcwidth)
{
struct pmc_classdep *pcd;
KASSERT(md != NULL, ("[ucp,%d] md is NULL", __LINE__));
PMCDBG0(MDP,INI,1, "ucp-initialize");
pcd = &md->pmd_classdep[PMC_MDEP_CLASS_INDEX_UCP];
pcd->pcd_caps = UCP_PMC_CAPS;
pcd->pcd_class = PMC_CLASS_UCP;
pcd->pcd_num = npmc;
pcd->pcd_ri = md->pmd_npmc;
pcd->pcd_width = pmcwidth;
pcd->pcd_allocate_pmc = ucp_allocate_pmc;
pcd->pcd_config_pmc = ucp_config_pmc;
pcd->pcd_describe = ucp_describe;
pcd->pcd_get_config = ucp_get_config;
pcd->pcd_get_msr = NULL;
pcd->pcd_pcpu_fini = uncore_pcpu_fini;
pcd->pcd_pcpu_init = uncore_pcpu_init;
pcd->pcd_read_pmc = ucp_read_pmc;
pcd->pcd_release_pmc = ucp_release_pmc;
pcd->pcd_start_pmc = ucp_start_pmc;
pcd->pcd_stop_pmc = ucp_stop_pmc;
pcd->pcd_write_pmc = ucp_write_pmc;
md->pmd_npmc += npmc;
}
int
pmc_uncore_initialize(struct pmc_mdep *md, int maxcpu)
{
uncore_cputype = md->pmd_cputype;
uncore_pmcmask = 0;
/*
* Initialize programmable counters.
*/
uncore_ucp_npmc = 8;
uncore_ucp_width = 48;
uncore_pmcmask |= ((1ULL << uncore_ucp_npmc) - 1);
ucp_initialize(md, maxcpu, uncore_ucp_npmc, uncore_ucp_width);
/*
* Initialize fixed function counters, if present.
*/
uncore_ucf_ri = uncore_ucp_npmc;
uncore_ucf_npmc = 1;
uncore_ucf_width = 48;
ucf_initialize(md, maxcpu, uncore_ucf_npmc, uncore_ucf_width);
uncore_pmcmask |= ((1ULL << uncore_ucf_npmc) - 1) << SELECTOFF(uncore_cputype);
PMCDBG2(MDP,INI,1,"uncore-init pmcmask=0x%jx ucfri=%d", uncore_pmcmask,
uncore_ucf_ri);
uncore_pcpu = malloc(sizeof(*uncore_pcpu) * maxcpu, M_PMC,
M_ZERO | M_WAITOK);
return (0);
}
void
pmc_uncore_finalize(struct pmc_mdep *md)
{
PMCDBG0(MDP,INI,1, "uncore-finalize");
free(uncore_pcpu, M_PMC);
uncore_pcpu = NULL;
}
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