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Message-Id: <200608230806.k7N8654c000504@frankl.hpl.hp.com>
Date: Wed, 23 Aug 2006 01:06:05 -0700
From: Stephane Eranian <eranian@...nkl.hpl.hp.com>
To: linux-kernel@...r.kernel.org
Cc: eranian@....hp.com
Subject: [PATCH 14/18] 2.6.17.9 perfmon2 patch for review: new i386 files
This patch contains the new i386 files
The files are as follows:
arch/i386/perfmon/Kconfig:
- add menuconfig options
arch/i386/perfmon/Makefile:
- makefile for arch specific files
arch/i386/perfmon/perfmon.c:
- architecture specific perfmon support. Implements architecrure specific
operations such as save/restore/start/stop/detect overflow counters, ...
arch/i386/perfmon/perfmon_gen_ia32.c:
- PMU description table for architectural perfmon, e.g., used by Core Duo/Core Solo
arch/i386/perfmon/perfmon_p4.c:
- PMU description table for P4 (32 and 64 bit modes)
arch/i386/perfmon/perfmon_p4_pebs_smpl.c:
- implement 32-bit PEBS sampling format
arch/i386/perfmon/perfmon_p6.c:
- PMU description table for all P6-based processors, incl Pentium M
include/asm-i386/perfmon.h:
- architecture specific header definitions
include/asm-i386/perfmon_p4_pebs_smpl.h:
- public header file for 32-bit PEBS sampling format
--- linux-2.6.17.9.base/arch/i386/perfmon/Kconfig 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/arch/i386/perfmon/Kconfig 2006-08-21 03:37:46.000000000 -0700
@@ -0,0 +1,55 @@
+menu "Hardware Performance Monitoring support"
+config PERFMON
+ bool "Perfmon2 performance monitoring interface"
+ select X86_LOCAL_APIC
+ default y
+ help
+ Enables the perfmon2 interface to access the hardware
+ performance counters. See <http://perfmon2.sf.net/> for
+ more details. If you're unsure, say Y.
+
+config PERFMON_P6
+ tristate "Support for P6/Pentium M processor hardware performance counters"
+ depends on PERFMON
+ default m
+ help
+ Enables support for the P6-style hardware performance counters.
+ To be used for P6 processors (Pentium III, PentiumPro) and also
+ for Pentium M.
+ If unsure, say M.
+
+config PERFMON_P4
+ tristate "Support for 32-bit P4/Xeon hardware performance counters"
+ depends on PERFMON
+ default m
+ help
+ Enables support for the 32-bit P4/Xeon style hardware performance
+ counters.
+ If unsure, say M.
+
+config PERFMON_P4_PEBS
+ tristate "Support for Intel P4 PEBS sampling format"
+ depends on PERFMON_P4
+ default m
+ help
+ Enables support for Precise Event-Based Sampling (PEBS) on the Intel P4
+ processors which support it. Does not work with P6 processors.
+ If unsure, say m.
+
+config PERFMON_GEN_IA32
+ tristate "Support for the architected IA-32 PMU"
+ depends on PERFMON
+ default m
+ help
+ Enables support for the architected IA-32 hardware performance counters.
+ You need a Core micro-architecture based processor for this to work.
+ If unsure, say M.
+
+config I386_PERFMON_K8
+ tristate "Support 32-bit mode AMD64 hardware performance counters"
+ depends on PERFMON
+ default m
+ help
+ Enables support for 32-bit mode AMD64 hardware performance counters.
+ If unsure, say m.
+endmenu
--- linux-2.6.17.9.base/arch/i386/perfmon/Makefile 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/arch/i386/perfmon/Makefile 2006-08-21 03:37:46.000000000 -0700
@@ -0,0 +1,12 @@
+#
+# Copyright (c) 2005-2006 Hewlett-Packard Development Company, L.P.
+# Contributed by Stephane Eranian <eranian@....hp.com>
+#
+obj-$(CONFIG_PERFMON) += perfmon.o
+obj-$(CONFIG_PERFMON_P6) += perfmon_p6.o
+obj-$(CONFIG_PERFMON_P4) += perfmon_p4.o
+obj-$(CONFIG_PERFMON_GEN_IA32) += perfmon_gen_ia32.o
+obj-$(CONFIG_PERFMON_P4_PEBS) += perfmon_p4_pebs_smpl.o
+obj-$(CONFIG_I386_PERFMON_K8) += perfmon_amd64.o
+
+perfmon_amd64-$(subst m,y,$(CONFIG_I386_PERFMON_K8)) += ../../x86_64/perfmon/perfmon_amd64.o
--- linux-2.6.17.9.base/arch/i386/perfmon/perfmon.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/arch/i386/perfmon/perfmon.c 2006-08-22 04:06:58.000000000 -0700
@@ -0,0 +1,1009 @@
+/*
+ * This file implements the IA-32/X86-64/EM64T specific
+ * support for the perfmon2 interface
+ *
+ * Copyright (c) 2005-2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@....hp.com>
+ */
+#include <linux/interrupt.h>
+#include <linux/perfmon.h>
+
+#define MSR_IA32_PEBS_ENABLE 0x3f1 /* unique per-thread */
+#define MSR_IA32_DS_AREA 0x600 /* unique per-thread */
+
+#ifdef __i386__
+#define __pfm_wrmsrl(a, b) wrmsr((a), (b), 0)
+#else
+#define __pfm_wrmsrl(a, b) wrmsrl((a), (b))
+#endif
+
+/*
+ * Debug Store (DS) management area for 32 and 64 bit P4/Xeon PEBS
+ */
+struct pfm_ds_area {
+ unsigned long bts_buf_base;
+ unsigned long bts_index;
+ unsigned long bts_abs_max;
+ unsigned long bts_intr_thres;
+ unsigned long pebs_buf_base;
+ unsigned long pebs_index;
+ unsigned long pebs_abs_max;
+ unsigned long pebs_intr_thres;
+ u64 pebs_cnt_reset;
+};
+
+asmlinkage void pmu_interrupt(void);
+
+static int (*pfm_stop_active)(struct task_struct *task,
+ struct pfm_context *ctx,
+ struct pfm_event_set *set);
+
+static int pfm_nmi_watchdog;
+
+static inline void pfm_set_pce(void)
+{
+ write_cr4(read_cr4() | X86_CR4_PCE);
+}
+
+static inline void pfm_clear_pce(void)
+{
+ write_cr4(read_cr4() & ~X86_CR4_PCE);
+}
+
+static inline int get_smt_id(void)
+{
+#ifdef CONFIG_SMP
+ int cpu = smp_processor_id();
+ return (cpu != first_cpu(cpu_sibling_map[cpu]));
+#else
+ return 0;
+#endif
+}
+
+void __pfm_write_reg(const struct pfm_arch_ext_reg *xreg, u64 val)
+{
+ u64 pmi;
+ int smt_id;
+
+ smt_id = get_smt_id();
+
+ /*
+ * HT is only supported by P4-style PMU
+ *
+ * Adjust for T1 if necessary:
+ *
+ * - move the T0_OS/T0_USR bits into T1 slots
+ * - move the OVF_PMI_T0 bits into T1 slot
+ *
+ * The P4/EM64T T1 is cleared by description table.
+ * User only works with T0.
+ */
+ if (smt_id) {
+ if (xreg->reg_type & PFM_REGT_ESCR) {
+
+ /* copy T0_USR & T0_OS to T1 */
+ val |= ((val & 0xc) >> 2);
+
+ /* clear bits T0_USR & T0_OS */
+ val &= ~0xc;
+
+ } else if (xreg->reg_type & PFM_REGT_CCCR) {
+ pmi = (val >> 26) & 0x1;
+ if (pmi) {
+ val &=~(1UL<<26);
+ val |= 1UL<<27;
+ }
+ }
+ }
+
+ if (xreg->addrs[smt_id])
+ wrmsrl(xreg->addrs[smt_id], val);
+}
+
+void __pfm_read_reg(const struct pfm_arch_ext_reg *xreg, u64 *val)
+{
+ int smt_id;
+
+ smt_id = get_smt_id();
+
+ if (likely(xreg->addrs[smt_id])) {
+ rdmsrl(xreg->addrs[smt_id], *val);
+ /*
+ * HT is only supported by P4-style PMU
+ *
+ * move the Tx_OS and Tx_USR bits into
+ * T0 slots setting the T1 slots to zero
+ */
+ if (xreg->reg_type & PFM_REGT_ESCR) {
+ if (smt_id)
+ *val |= (((*val) & 0x3) << 2);
+
+ /*
+ * zero out bits that are reserved
+ * (including T1_OS and T1_USR)
+ */
+ *val &= PFM_ESCR_RSVD;
+ }
+ } else
+ *val = 0;
+}
+
+void pfm_arch_init_percpu(void)
+{
+ /*
+ * We initialize APIC with LVTPC vector masked.
+ *
+ * this is motivated by the fact that the PMU may be
+ * in a condition where it has already an interrupt pending.
+ * Given that we cannot touch the PMU registers
+ * at this point, we may not have a way to remove the condition.
+ * As such, we need to keep the interrupt masked until a PMU
+ * description is loaded. At that point, we can enable intr.
+ *
+ * If NMI is using local APIC, then the problem does not exist
+ * because LAPIC has already been properly initialized.
+ */
+ if (nmi_watchdog != NMI_LOCAL_APIC) {
+ apic_write(APIC_LVTPC, APIC_LVT_MASKED|LOCAL_PERFMON_VECTOR);
+ PFM_INFO("CPU%d APIC LVTPC vector masked", smp_processor_id());
+ }
+}
+
+/*
+ * function called from pfm_load_context_*(). Task is not guaranteed to be
+ * current task. If not, then other task is guaranteed stopped and off any CPU.
+ * context is locked and interrupts are masked.
+ *
+ * On pfm_load_context(), the interface guarantees monitoring is stopped.
+ *
+ * For system-wide task is NULL
+ */
+int pfm_arch_load_context(struct pfm_context *ctx, struct task_struct *task)
+{
+ struct pfm_arch_context *ctx_arch;
+
+ ctx_arch = pfm_ctx_arch(ctx);
+
+ /*
+ * always authorize user level rdpmc for self-monitoring
+ * only. It is not possible to do this for system-wide because
+ * thread may not be running on the monitored CPU.
+ *
+ * We set a private flag to avoid write cr4.ce on context switch
+ * if not necessary as this is a very expensive operation.
+ */
+ if (task == current) {
+ ctx_arch->flags |= PFM_X86_FL_INSECURE;
+ pfm_set_pce();
+ PFM_DBG("setting cr4.pce (rdpmc authorized at user level)");
+ }
+ return 0;
+}
+
+/*
+ * function called from pfm_unload_context_*(). Context is locked.
+ * interrupts are masked. task is not guaranteed to be current task.
+ * Access to PMU is not guaranteed.
+ *
+ * function must do whatever arch-specific action is required on unload
+ * of a context.
+ *
+ * called for both system-wide and per-thread.
+ * task is NULL for system-wide
+ */
+void pfm_arch_unload_context(struct pfm_context *ctx, struct task_struct *task)
+{
+ struct pfm_arch_context *ctx_arch;
+
+ ctx_arch = pfm_ctx_arch(ctx);
+
+ if (ctx_arch->flags & PFM_X86_FL_INSECURE) {
+ pfm_clear_pce();
+ ctx_arch->flags &= ~PFM_X86_FL_INSECURE;
+ PFM_DBG("clearing cr4.pce");
+ }
+}
+
+/*
+ * called from __pfm_interrupt_handler(). ctx is not NULL.
+ * ctx is locked. PMU interrupt is masked.
+ *
+ * must stop all monitoring to ensure handler has consistent view.
+ * must collect overflowed PMDs bitmask into povfls_pmds and
+ * npend_ovfls. If no interrupt detected then npend_ovfls
+ * must be set to zero.
+ */
+void pfm_arch_intr_freeze_pmu(struct pfm_context *ctx)
+{
+ struct pfm_arch_pmu_info *arch_info;
+ struct pfm_arch_context *ctx_arch;
+ struct pfm_event_set *set;
+ struct pfm_ds_area *ds;
+
+ arch_info = pfm_pmu_conf->arch_info;
+ ctx_arch = pfm_ctx_arch(ctx);
+
+ set = ctx->active_set;
+
+ /*
+ * stop active monitoring and collect overflow information
+ */
+ pfm_stop_active(current, ctx, set);
+
+ /*
+ * PMU is stopped, thus PEBS is stopped already
+ * on PEBS full interrupt, the IQ_CCCR4 counter does
+ * not have the OVF bit set. Thus we use the pebs index
+ * to detect overflow. This is required because we may
+ * have more than one reason for overflow due to 64-bit
+ * counter virtualization.
+ *
+ * We don't actually keep track of the overflow unless
+ * IQ_CTR4 is actually used.
+ *
+ * With HT enabled, the mappings are such that IQ_CTR4 and IQ_CTR5
+ * are mapped onto the same PMD registers.
+ */
+ if (ctx_arch->ds_area) {
+ ds = ctx_arch->ds_area;
+ if (ds->pebs_index >= ds->pebs_intr_thres
+ && pfm_bv_isset(set->used_pmds, arch_info->pebs_ctr_idx)) {
+ pfm_bv_set(set->povfl_pmds, arch_info->pebs_ctr_idx);
+ set->npend_ovfls++;
+ }
+ }
+}
+
+/*
+ * unfreeze PMU from pfm_do_interrupt_handler()
+ * ctx may be NULL for spurious
+ */
+void pfm_arch_intr_unfreeze_pmu(struct pfm_context *ctx)
+{
+ struct pfm_arch_context *ctx_arch;
+
+ if (ctx == NULL)
+ return;
+
+ ctx_arch = pfm_ctx_arch(ctx);
+
+ pfm_arch_restore_pmcs(ctx, ctx->active_set);
+
+ /*
+ * reload DS area pointer because it is cleared by
+ * pfm_stop_active()
+ */
+ if (ctx_arch->ds_area) {
+ __pfm_wrmsrl(MSR_IA32_DS_AREA, ctx_arch->ds_area);
+ PFM_DBG("restoring DS");
+ }
+}
+
+/*
+ * Called from pfm_ctxsw(). Task is guaranteed to be current.
+ * set cannot be NULL. Context is locked. Interrupts are masked.
+ * Caller has already restored all PMD and PMC registers.
+ *
+ * must reactivate monitoring
+ */
+void pfm_arch_ctxswin_thread(struct task_struct *task, struct pfm_context *ctx,
+ struct pfm_event_set *set)
+{
+ struct pfm_arch_context *ctx_arch;
+
+ ctx_arch = pfm_ctx_arch(ctx);
+
+ if (ctx_arch->flags & PFM_X86_FL_INSECURE)
+ pfm_set_pce();
+
+ /*
+ * reload DS management area pointer. Pointer
+ * not managed as a PMC thus it is not restored
+ * with the rest of the registers.
+ */
+ if (ctx_arch->ds_area)
+ __pfm_wrmsrl(MSR_IA32_DS_AREA, ctx_arch->ds_area);
+}
+
+static int __pfm_stop_active_p6(struct task_struct *task,
+ struct pfm_context *ctx,
+ struct pfm_event_set *set)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ struct pfm_arch_ext_reg *xrc, *xrd;
+ u64 *cnt_mask, *pmds;
+ u64 val, wmask, ovfl_mask;
+ u16 i, num;
+
+ num = set->nused_pmcs;
+ xrc = arch_info->pmc_addrs;
+ xrd = arch_info->pmd_addrs;
+ wmask = PFM_ONE_64 << pfm_pmu_conf->counter_width;
+
+ /*
+ * clear enable bit (stop monitoring)
+ * Unfortunately, this is very expensive!
+ * wrmsrl() is serialized.
+ */
+ for (i = 0; num; i++) {
+ if (pfm_bv_isset(set->used_pmcs, i)) {
+ __pfm_wrmsrl(xrc[i].addrs[0], 0);
+ num--;
+ }
+ }
+
+ /*
+ * if we already having a pending overflow condition, we do not
+ * save them PMDs here, we let the generic code take care of it,
+ * if needed.
+ */
+ if (set->npend_ovfls)
+ return 1;
+
+ ovfl_mask = pfm_pmu_conf->ovfl_mask;
+ cnt_mask = pfm_pmu_conf->cnt_pmds;
+ pmds = set->view->set_pmds;
+ /*
+ * check for pending overflows and save PMDs (combo)
+ * Must check for counting PMDs because of virtual PMDs
+ */
+ num = set->nused_pmds;
+ for (i = 0; num; i++) {
+ if (pfm_bv_isset(set->used_pmds, i)) {
+ val = pfm_read_pmd(ctx, i);
+ if (likely(pfm_bv_isset(cnt_mask, i))) {
+ if (!(val & wmask)) {
+ pfm_bv_set(set->povfl_pmds, i);
+ set->npend_ovfls++;
+ }
+ val = (pmds[i] & ~ovfl_mask) | (val & ovfl_mask);
+ }
+ pmds[i] = val;
+ num--;
+ }
+ }
+ /* no need to save PMDs after this */
+ return 0;
+}
+
+/*
+ * stop active set only
+ */
+static int __pfm_stop_active_p4(struct task_struct *task,
+ struct pfm_context *ctx,
+ struct pfm_event_set *set)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ struct pfm_arch_context *ctx_arch;
+ struct pfm_arch_ext_reg *xrc, *xrd;
+ u64 used_enable_mask[PFM_PMC_BV];
+ u32 i, num, count;
+ u16 max_pmc;
+ u64 cccr, ctr1, ctr2;
+
+ ctx_arch = pfm_ctx_arch(ctx);
+ max_pmc = pfm_pmu_conf->max_pmc;
+ xrc = arch_info->pmc_addrs;
+ xrd = arch_info->pmd_addrs;
+
+ /*
+ * build used enable PMC bitmask
+ * if user did not set any CCCR, then mask is
+ * empty and there is nothing to do because nothing
+ * was started
+ */
+ bitmap_and(ulp(used_enable_mask),
+ ulp(set->used_pmcs),
+ ulp(arch_info->enable_mask),
+ max_pmc);
+
+ count = bitmap_weight(ulp(used_enable_mask), max_pmc);
+
+ /*
+ * stop PEBS and clear DS area pointer
+ */
+ if (ctx_arch->ds_area) {
+ __pfm_wrmsrl(MSR_IA32_PEBS_ENABLE, 0);
+ __pfm_wrmsrl(MSR_IA32_DS_AREA, 0);
+ }
+
+ /*
+ * ensures we do not destroy pending overflow
+ * information. If pended interrupts are already
+ * known, then we just stop monitoring.
+ */
+ if (set->npend_ovfls) {
+ /*
+ * clear enable bit
+ * unfortunately, this is very expensive!
+ */
+ num = count;
+ for (i = 0; num; i++) {
+ BUG_ON(i >= PFM_MAX_PMCS);
+ if (pfm_bv_isset(used_enable_mask, i)) {
+ __pfm_write_reg(xrc+i, 0);
+ num--;
+ }
+ }
+ /* need save PMDs at upper level */
+ return 1;
+ }
+
+ /*
+ * stop monitoring, collect pending overflow information and
+ * save pmds.
+ *
+ * We need to read the CCR twice, once to get overflow info
+ * and a second to stop monitoring (which destroys the OVF flag)
+ */
+ num = count;
+ for (i = 0; num; i++) {
+ BUG_ON(i >= PFM_MAX_PMCS);
+ if (pfm_bv_isset(used_enable_mask, i)) {
+
+ /* read counter (PMD) controlled by PMC */
+ __pfm_read_reg(xrd+(xrc[i].ctr), &ctr1);
+
+ /* read CCCR (PMC) value */
+ __pfm_read_reg(xrc+i, &cccr);
+
+ /* clear CCCR value: stop counter but destroy OVF */
+ __pfm_write_reg(xrc+i, 0);
+
+ /* read counter controlled by CCCR again */
+ __pfm_read_reg(xrd+(xrc[i].ctr), &ctr2);
+
+ /*
+ * there is an overflow if either:
+ * - CCCR.ovf is set (and we just cleared it)
+ * - ctr2 < ctr1
+ * in that case we set the bit corresponding to the
+ * overflowed PMD in povfl_pmds.
+ */
+ if ((cccr & (PFM_ONE_64<<31)) || (ctr2 < ctr1)) {
+ pfm_bv_set(set->povfl_pmds, xrc[i].ctr);
+ set->npend_ovfls++;
+ }
+ num--;
+ }
+ }
+ /* save the PMD at higher level */
+ return 1;
+}
+
+/*
+ * Called from pfm_stop() and pfm_ctxsw() when idle
+ * task and EXCL_IDLE is on.
+ *
+ * Interrupts are masked. Context is locked. Set is the active set.
+ *
+ * For per-thread:
+ * task is not necessarily current. If not current task, then
+ * task is guaranteed stopped and off any cpu. Access to PMU
+ * is not guaranteed. Interrupts are masked. Context is locked.
+ * Set is the active set.
+ *
+ * For system-wide:
+ * task is current
+ *
+ * must disable active monitoring.
+ */
+void pfm_arch_stop(struct task_struct *task, struct pfm_context *ctx,
+ struct pfm_event_set *set)
+{
+ if (task != current)
+ return;
+
+ pfm_stop_active(task, ctx, set);
+}
+
+/*
+ * Called from pfm_ctxsw(). Task is guaranteed to be current.
+ * Context is locked. Interrupts are masked. Monitoring is active.
+ * PMU access is guaranteed. PMC and PMD registers are live in PMU.
+ *
+ * Must stop monitoring, save pending overflow information
+ * Return:
+ * non-zero : did not save PMDs (as part of stopping the PMU)
+ * 0 : saved PMDs (no need to save them in caller)
+ */
+int pfm_arch_ctxswout_thread(struct task_struct *task, struct pfm_context *ctx,
+ struct pfm_event_set *set)
+{
+ struct pfm_arch_context *ctx_arch;
+
+ ctx_arch = pfm_ctx_arch(ctx);
+
+ if (unlikely(ctx_arch->flags & PFM_X86_FL_INSECURE))
+ pfm_clear_pce();
+
+ /*
+ * disable lazy restore of PMCS on ctxswin because
+ * we modify some of them.
+ */
+ set->priv_flags |= PFM_SETFL_PRIV_MOD_PMCS;
+
+ return pfm_stop_active(task, ctx, set);
+}
+
+/*
+ * called from pfm_start() or pfm_ctxsw() when idle task and
+ * EXCL_IDLE is on.
+ *
+ * Interrupts are masked. Context is locked. Set is the active set.
+ *
+ * For per-trhead:
+ * Task is not necessarily current. If not current task, then task
+ * is guaranteed stopped and off any cpu. Access to PMU is not guaranteed.
+ *
+ * For system-wide:
+ * task is always current
+ *
+ * must enable active monitoring.
+ */
+static void __pfm_arch_start(struct task_struct *task, struct pfm_context *ctx,
+ struct pfm_event_set *set)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ struct pfm_arch_context *ctx_arch;
+ struct pfm_arch_ext_reg *xregs;
+ u64 *impl_mask;
+ u16 i, max_pmc;
+
+
+ ctx_arch = pfm_ctx_arch(ctx);
+ max_pmc = pfm_pmu_conf->max_pmc;
+ impl_mask = pfm_pmu_conf->impl_pmcs;
+ xregs = arch_info->pmc_addrs;
+
+ /*
+ * we must actually install all implemented pmcs registers because
+ * until started, we do not write any PMC registers. For P4-style,
+ * touching only the CCCR (which have the enable field) is not enough.
+ * On P6-style, all PMCs have an enable bit, so this is not worse.
+ *
+ * The registers that are actually not used have their default value
+ * such that the counter does not count anything. As such, we can afford
+ * to write all of them but then stop only the one we use on stop and
+ * ctxswout.
+ */
+ for (i = 0; i < max_pmc; i++) {
+ if (pfm_bv_isset(impl_mask, i))
+ __pfm_write_reg(xregs+i, set->pmcs[i]);
+ }
+
+ /*
+ * reload DS area pointer. PEBS_ENABLE is restored with the PMCs
+ * in pfm_restore_pmcs(). PEBS_ENABLE is not considered part of
+ * the set of PMCs with an enable bit. This is reserved for counter
+ * PMC, i.e., CCCR.
+ */
+ if (ctx_arch->ds_area) {
+ __pfm_wrmsrl(MSR_IA32_DS_AREA, ctx_arch->ds_area);
+ PFM_DBG("restoring DS");
+ }
+}
+
+void pfm_arch_start(struct task_struct *task, struct pfm_context *ctx,
+ struct pfm_event_set *set)
+{
+ /*
+ * mask/unmask uses start/stop mechanism, so we cannot allow
+ * while masked.
+ */
+ if (ctx->state == PFM_CTX_MASKED)
+ return;
+
+ if (task == current)
+ __pfm_arch_start(task, ctx, set);
+}
+
+/*
+ * function called from pfm_switch_sets(), pfm_context_load_thread(),
+ * pfm_context_load_sys(), pfm_ctxsw(), pfm_switch_sets()
+ * context is locked. Interrupts are masked. set cannot be NULL.
+ * Access to the PMU is guaranteed.
+ *
+ * function must restore all PMD registers from set.
+ */
+void pfm_arch_restore_pmds(struct pfm_context *ctx, struct pfm_event_set *set)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ struct pfm_arch_ext_reg *xregs;
+ u64 ovfl_mask, val, *pmds;
+ u64 *impl_rw_mask, *cnt_mask;
+ u16 i, max_rw_pmd;
+
+ pmds = set->view->set_pmds;
+ impl_rw_mask = pfm_pmu_conf->impl_rw_pmds;
+ ovfl_mask = pfm_pmu_conf->ovfl_mask;
+ max_rw_pmd = pfm_pmu_conf->max_rw_pmd;
+ cnt_mask = pfm_pmu_conf->cnt_pmds;
+ xregs = arch_info->pmd_addrs;
+
+ /*
+ * must restore all pmds to avoid leaking
+ * especially when PFM_X86_FL_INSECURE is set.
+ *
+ * XXX: should check PFM_X86_FL_INSECURE==0 and use used_pmd instead
+ */
+ for (i = 0; i < max_rw_pmd; i++) {
+ if (likely(pfm_bv_isset(impl_rw_mask, i))) {
+ val = pmds[i];
+ if (likely(pfm_bv_isset(cnt_mask, i)))
+ val |= ~ovfl_mask;
+ __pfm_write_reg(xregs+i, val);
+ }
+ }
+}
+
+/*
+ * function called from pfm_switch_sets(), pfm_context_load_thread(),
+ * pfm_context_load_sys(), pfm_ctxsw().
+ * Context is locked. Interrupts are masked. set cannot be NULL.
+ * Access to the PMU is guaranteed.
+ *
+ * function must restore all PMC registers from set
+ */
+void pfm_arch_restore_pmcs(struct pfm_context *ctx, struct pfm_event_set *set)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ struct pfm_arch_ext_reg *xregs;
+ u64 *mask;
+ u16 i, num;
+
+ xregs = arch_info->pmc_addrs;
+
+ if (arch_info->pmu_style == PFM_X86_PMU_P6) {
+ num = set->nused_pmcs;
+ mask = set->used_pmcs;
+ } else {
+ num = pfm_pmu_conf->num_pmcs;
+ mask = pfm_pmu_conf->impl_pmcs;
+ }
+
+ /*
+ * - by default, no PMC measures anything
+ * - on ctxswout, all used PMCs are disabled (cccr cleared)
+ *
+ * we need to restore the PMC (incl enable bits) only if
+ * not masked and user issued pfm_start()
+ */
+ if (ctx->state == PFM_CTX_MASKED || ctx->flags.started == 0)
+ return;
+
+ /*
+ * In general, writing MSRs is very expensive, so try to be smart.
+ *
+ * P6-style:
+ * - pmc are totally independent of each other, there is
+ * possible side-effect from stale pmcs. Therefore we only
+ * restore the registers we use
+ * P4-style:
+ * - must restore everything because there are some dependencies
+ * (e.g., ESCR and CCCR)
+ */
+ for (i = 0; num; i++) {
+ if (pfm_bv_isset(mask, i)) {
+ __pfm_write_reg(xregs+i, set->pmcs[i]);
+ num--;
+ }
+ }
+}
+
+fastcall void smp_pmu_interrupt(struct pt_regs *regs)
+{
+ ack_APIC_irq();
+ irq_enter();
+ pfm_interrupt_handler(LOCAL_PERFMON_VECTOR, NULL, regs);
+ irq_exit();
+ /*
+ * On Intel P6, Pentium M, P4, EM64T:
+ * - it is necessary to clear the MASK field for the LVTPC
+ * vector. Otherwise interrupts remain masked. See
+ * section 8.5.1
+ * AMD X8-64:
+ * - the documentation does not stipulate the behavior.
+ * To be safe, we also rewrite the vector to clear the
+ * mask field
+ *
+ * We only clear the mask field, if there is a PMU description
+ * loaded. Otherwise we would have a problem because without
+ * PMU description we cannot access PMu registers to clear the
+ * overfow condition and may end up in a flood of PMU interrupts.
+ *
+ * The APIC vector is initialized as masked, but we may already
+ * have a pending PMU overflow by the time we get to
+ * pfm_arch_init_percpu(). Such interrupt would generate a call
+ * to this function, which would undo the masking and would
+ * cause a flood.
+ */
+ if (pfm_pmu_conf)
+ apic_write(APIC_LVTPC, LOCAL_PERFMON_VECTOR);
+}
+
+
+void pfm_vector_init(void)
+{
+ set_intr_gate(LOCAL_PERFMON_VECTOR, (void *)pmu_interrupt);
+ PFM_INFO("installed interrupt gate");
+}
+
+static void __pfm_stop_one_pmu(void *dummy)
+{
+ struct pfm_arch_pmu_info *arch_info;
+ struct pfm_arch_ext_reg *xregs;
+ unsigned int i, num_pmcs;
+
+ PFM_DBG("stopping on CPU%d: LVT=0x%x",
+ smp_processor_id(),
+ (unsigned int)apic_read(APIC_LVTPC));
+
+ num_pmcs = pfm_pmu_conf->num_pmcs;
+ arch_info = pfm_pmu_conf->arch_info;
+ xregs = arch_info->pmc_addrs;
+
+ for (i = 0; i < num_pmcs; i++)
+ if (pfm_bv_isset(arch_info->enable_mask, i))
+ __pfm_write_reg(xregs+i, 0);
+
+ /*
+ * now that we have a PMU description we can deal with spurious
+ * interrupts, thus we can safely re-enable the LVTPC vector
+ * by clearing the mask field
+ */
+ apic_write(APIC_LVTPC, LOCAL_PERFMON_VECTOR);
+ PFM_INFO("CPU%d installed APIC vector", smp_processor_id());
+}
+
+/*
+ * called from pfm_register_pmu_config() after the new
+ * config has been validated and installed. The pfm_session_lock
+ * is held.
+ *
+ * Must sanity check the arch-specific config information
+ *
+ * return:
+ * < 0 : if error
+ * 0 : if success
+ */
+int pfm_arch_pmu_config_check(struct pfm_pmu_config *cfg)
+{
+ struct pfm_arch_pmu_info *arch_info = cfg->arch_info;
+
+ /*
+ * adust stop routine based on PMU model
+ *
+ * P6, Pentium M, AMD X86-64 = P6
+ * P4, Xeon, EM64T = P4
+ */
+ switch(arch_info->pmu_style) {
+ case PFM_X86_PMU_P4:
+ pfm_stop_active = __pfm_stop_active_p4;
+ break;
+ case PFM_X86_PMU_P6:
+ pfm_stop_active = __pfm_stop_active_p6;
+ break;
+ default:
+ PFM_INFO("unknown pmu_style=%d", arch_info->pmu_style);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * called from pfm_register_pmu_config() after the new
+ * config has been validated and installed. No lock
+ * is held. Interrupts are not masked.
+ *
+ * The role of the function is, based on the PMU description, to
+ * put the PMU into a quiet state on each CPU. This function is
+ * not necessary if there is an architected way of doing this
+ * for a processor family.
+ */
+void pfm_arch_pmu_config_init(void)
+{
+ /*
+ * if NMI watchdog is using Local APIC, then
+ * counters are already initialized to a decent
+ * state
+ */
+ if (nmi_watchdog == NMI_LOCAL_APIC)
+ return;
+
+ on_each_cpu(__pfm_stop_one_pmu, NULL, 1, 1);
+}
+
+int pfm_arch_initialize(void)
+{
+ return 0;
+}
+
+void pfm_arch_mask_monitoring(struct pfm_context *ctx)
+{
+ /*
+ * on IA-32 masking/unmasking uses start/stop
+ * mechanism
+ */
+ pfm_arch_stop(current, ctx, ctx->active_set);
+}
+
+void pfm_arch_unmask_monitoring(struct pfm_context *ctx)
+{
+ /*
+ * on IA-32 masking/unmasking uses start/stop
+ * mechanism
+ */
+ __pfm_arch_start(current, ctx, ctx->active_set);
+}
+
+
+static void
+__pfm_reserve_lapic_nmi(void *data)
+{
+ PFM_DBG("rewrite APIC to perfmon");
+ apic_write(APIC_LVTPC, LOCAL_PERFMON_VECTOR);
+}
+
+static void
+__pfm_restart_lapic_nmi(void *dummy)
+{
+ PFM_DBG("restart APIC NMI");
+ setup_apic_nmi_watchdog();
+}
+
+static int
+pfm_reserve_lapic_nmi(void)
+{
+ int ret = 0;
+ unsigned long flags;
+
+ local_save_flags(flags);
+ local_irq_enable();
+
+
+ /*
+ * keep track that we have disabled NMI watchdog
+ */
+ pfm_nmi_watchdog = 1;
+
+ /*
+ * The NMI LAPIC watchdog timer is active on every CPU, so we need
+ * to reserve (disable) on each CPU. The problem is that the function
+ * reserve_lapic_nmi() stops the NMI watchdog but only clears the
+ * counters on the current CPU. The other counters on the other CPUs
+ * keep on running until they overflow. At that point, they will be
+ * treated as spurious interrupts by perfmon and the counters will not
+ * be reloaded, so we are fine.
+ */
+ ret = reserve_lapic_nmi();
+ if (ret)
+ goto skip;
+
+ /*
+ * all cpu, incl. self
+ */
+ on_each_cpu(__pfm_reserve_lapic_nmi, NULL, 0, 1);
+
+skip:
+ local_irq_restore(flags);
+
+ return ret;
+}
+
+static void
+pfm_release_lapic_nmi(void)
+{
+ unsigned long flags;
+
+ local_save_flags(flags);
+ local_irq_enable();
+
+ /*
+ * must be done BEFORE setup_apic_nmi_watchdog()
+ */
+ release_lapic_nmi();
+
+ /*
+ * all cpu, incl self
+ */
+ on_each_cpu( __pfm_restart_lapic_nmi, NULL, 0, 1);
+
+ pfm_nmi_watchdog = 0;
+
+ local_irq_restore(flags);
+}
+
+/*
+ * Called from pfm_release_session() after release is done.
+ * Holding pfs_sessions lock. Interrupts may be masked.
+ */
+void pfm_arch_release_session(struct pfm_sessions *session,
+ struct pfm_context *ctx,
+ u32 cpu)
+{
+ u32 sum;
+
+ sum = session->pfs_task_sessions + session->pfs_sys_sessions;
+
+ PFM_DBG("sum=%u nmi=%d pfm_nmi=%d", sum, nmi_watchdog, pfm_nmi_watchdog);
+
+ /*
+ * release APIC NMI when last session
+ */
+ if (sum == 0 && pfm_nmi_watchdog)
+ pfm_release_lapic_nmi();
+}
+
+/*
+ * Called from pfm_reserve_session() before any actual reservation
+ * is made. Holding pfs_sessions lock. Interrupts may be masked.
+ * Return:
+ * < 0 cannot reserve
+ * 0 successful
+ */
+int pfm_arch_reserve_session(struct pfm_sessions *session,
+ struct pfm_context *ctx,
+ u32 cpu)
+{
+ u32 sum;
+
+ sum = session->pfs_task_sessions + session->pfs_sys_sessions;
+
+ PFM_DBG("sum=%u nmi=%d pfm_nmi=%d", sum, nmi_watchdog, pfm_nmi_watchdog);
+
+ /*
+ * reserve only when first session
+ */
+ if(sum == 0 && nmi_watchdog == NMI_LOCAL_APIC
+ && pfm_reserve_lapic_nmi() < 0) {
+ PFM_WARN("conflict with NMI");
+ return -EBUSY;
+ }
+ return 0;
+}
+
+static int has_ia32_arch_pmu(void)
+{
+ unsigned int eax, ebx, ecx, edx;
+
+ if (cpu_data->x86_vendor != X86_VENDOR_INTEL)
+ return 0;
+
+ cpuid(0x0, &eax, &ebx, &ecx, &edx);
+ if (eax < 0xa)
+ return 0;
+
+ cpuid(0xa, &eax, &ebx, &ecx, &edx);
+ return (eax & 0xff) < 1 ? 0 : 1;
+}
+
+char *pfm_arch_get_pmu_module_name(void)
+{
+ switch(cpu_data->x86) {
+ case 6:
+ switch(cpu_data->x86_model) {
+ case 3: /* Pentium II */
+ case 7 ... 11:
+ case 13:
+ return "perfmon_p6";
+ default:
+ return NULL;
+ }
+ case 15:
+ /* All Opteron processors */
+ if (cpu_data->x86_vendor == X86_VENDOR_AMD)
+ return "perfmon_amd64";
+
+ switch(cpu_data->x86_model) {
+ case 0 ... 6:
+ return "perfmon_p4";
+ }
+ /* FALL THROUGH */
+ default:
+ if (has_ia32_arch_pmu())
+ return "perfmon_gen_ia32";
+ return NULL;
+ }
+ return NULL;
+}
--- linux-2.6.17.9.base/arch/i386/perfmon/perfmon_gen_ia32.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/arch/i386/perfmon/perfmon_gen_ia32.c 2006-08-21 03:37:46.000000000 -0700
@@ -0,0 +1,260 @@
+/*
+ * This file contains the IA-32 architectural perfmon register description tables.
+ *
+ * The IA-32 architectural perfmon (PMU) was introduced with Intel Core Solo
+ * and Core Duo processors.
+ *
+ * Copyright (c) 2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@....hp.com>
+ */
+#include <linux/module.h>
+#include <linux/perfmon.h>
+#include <asm/msr.h>
+#include <asm/apic.h>
+
+MODULE_AUTHOR("Stephane Eranian <eranian@....hp.com>");
+MODULE_DESCRIPTION("Generic IA-32 PMU description table");
+MODULE_LICENSE("GPL");
+
+/*
+ * - upper 32 bits are reserved
+ * - INT: APIC enable bit is reserved (forced to 1)
+ * - bit 21 is reserved
+ */
+#define PFM_GEN_IA32_PMC_RSVD ~((0xffffffffULL<<32) \
+ | (PFM_ONE_64<<20) \
+ | (PFM_ONE_64<<21))
+
+/*
+ * force Local APIC interrupt on overflow
+ * disable with NO_EMUL64
+ */
+#define PFM_GEN_IA32_PMC_VAL (PFM_ONE_64<<20)
+#define PFM_GEN_IA32_NO64 (PFM_ONE_64<<20)
+
+/*
+ * architectuture specifies that:
+ * IA32_PMCx MSR starts at 0xc1 & occupy a contiguous block of MSR addr
+ * IA32_PERFEVTSELx MSR starts at 0x186 & occupy a contiguous block of MSR addr
+ */
+#define MSR_GEN_PERFEVTSEL_BASE MSR_P6_EVNTSEL0
+#define MSR_GEN_PMC_BASE MSR_P6_PERFCTR0
+
+#define PFM_GEN_IA32_SEL(n) { \
+ .addrs[0] = MSR_GEN_PERFEVTSEL_BASE+(n), \
+ .addrs[1] = 0, \
+ .ctr = n, \
+ .reg_type = PFM_REGT_SELEN}
+
+#define PFM_GEN_IA32_CTR(n) { \
+ .addrs[0] = MSR_GEN_PMC_BASE+(n), \
+ .addrs[1] = 0, \
+ .ctr = n, \
+ .reg_type = PFM_REGT_CTR}
+
+struct pmu_eax {
+ unsigned int version:8;
+ unsigned int num_cnt:8;
+ unsigned int cnt_width:8;
+ unsigned int ebx_length:8;
+};
+
+/*
+ * physical addresses of MSR controlling the perfevtsel and counter registers
+ */
+struct pfm_arch_pmu_info pfm_gen_ia32_pmu_info={
+ .pmc_addrs = {
+ PFM_GEN_IA32_SEL(0) , PFM_GEN_IA32_SEL(1), PFM_GEN_IA32_SEL(2), PFM_GEN_IA32_SEL(3),
+ PFM_GEN_IA32_SEL(4) , PFM_GEN_IA32_SEL(5), PFM_GEN_IA32_SEL(6), PFM_GEN_IA32_SEL(7),
+ PFM_GEN_IA32_SEL(8) , PFM_GEN_IA32_SEL(9), PFM_GEN_IA32_SEL(10), PFM_GEN_IA32_SEL(11),
+ PFM_GEN_IA32_SEL(12), PFM_GEN_IA32_SEL(13), PFM_GEN_IA32_SEL(14), PFM_GEN_IA32_SEL(15),
+ PFM_GEN_IA32_SEL(16), PFM_GEN_IA32_SEL(17), PFM_GEN_IA32_SEL(18), PFM_GEN_IA32_SEL(19),
+ PFM_GEN_IA32_SEL(20), PFM_GEN_IA32_SEL(21), PFM_GEN_IA32_SEL(22), PFM_GEN_IA32_SEL(23),
+ PFM_GEN_IA32_SEL(24), PFM_GEN_IA32_SEL(25), PFM_GEN_IA32_SEL(26), PFM_GEN_IA32_SEL(27),
+ PFM_GEN_IA32_SEL(28), PFM_GEN_IA32_SEL(29), PFM_GEN_IA32_SEL(30), PFM_GEN_IA32_SEL(31)
+ },
+ .pmd_addrs = {
+ PFM_GEN_IA32_CTR(0) , PFM_GEN_IA32_CTR(1), PFM_GEN_IA32_CTR(2), PFM_GEN_IA32_CTR(3),
+ PFM_GEN_IA32_CTR(4) , PFM_GEN_IA32_CTR(5), PFM_GEN_IA32_CTR(6), PFM_GEN_IA32_CTR(7),
+ PFM_GEN_IA32_CTR(8) , PFM_GEN_IA32_CTR(9), PFM_GEN_IA32_CTR(10), PFM_GEN_IA32_CTR(11),
+ PFM_GEN_IA32_CTR(12), PFM_GEN_IA32_CTR(13), PFM_GEN_IA32_CTR(14), PFM_GEN_IA32_CTR(15),
+ PFM_GEN_IA32_CTR(16), PFM_GEN_IA32_CTR(17), PFM_GEN_IA32_CTR(18), PFM_GEN_IA32_CTR(19),
+ PFM_GEN_IA32_CTR(20), PFM_GEN_IA32_CTR(21), PFM_GEN_IA32_CTR(22), PFM_GEN_IA32_CTR(23),
+ PFM_GEN_IA32_CTR(24), PFM_GEN_IA32_CTR(25), PFM_GEN_IA32_CTR(26), PFM_GEN_IA32_CTR(27),
+ PFM_GEN_IA32_CTR(28), PFM_GEN_IA32_CTR(29), PFM_GEN_IA32_CTR(30), PFM_GEN_IA32_CTR(31)
+ },
+ .pmu_style = PFM_X86_PMU_P6,
+};
+
+#define PFM_GEN_IA32_C(n) { \
+ .type = PFM_REG_I64, \
+ .desc = "PERFEVTSEL"#n, \
+ .dfl_val = PFM_GEN_IA32_PMC_VAL, \
+ .rsvd_msk = PFM_GEN_IA32_PMC_RSVD, \
+ .no_emul64_msk = PFM_GEN_IA32_NO64, \
+ }
+
+#define PFM_GEN_IA32_D(n) { \
+ .type = PFM_REG_C, \
+ .desc = "PMC"#n, \
+ .dfl_val = 0, \
+ .rsvd_msk = -1, \
+ .no_emul64_msk = 0, \
+ }
+
+static struct pfm_reg_desc pfm_gen_ia32_pmc_desc[]={
+/* pmc0 */ PFM_GEN_IA32_C(0), PFM_GEN_IA32_C(1), PFM_GEN_IA32_C(2), PFM_GEN_IA32_C(3),
+/* pmc4 */ PFM_GEN_IA32_C(4), PFM_GEN_IA32_C(5), PFM_GEN_IA32_C(6), PFM_GEN_IA32_C(7),
+/* pmc8 */ PFM_GEN_IA32_C(8), PFM_GEN_IA32_C(9), PFM_GEN_IA32_C(10), PFM_GEN_IA32_C(11),
+/* pmc12 */ PFM_GEN_IA32_C(12), PFM_GEN_IA32_C(13), PFM_GEN_IA32_C(14), PFM_GEN_IA32_C(15),
+/* pmc16 */ PFM_GEN_IA32_C(16), PFM_GEN_IA32_C(17), PFM_GEN_IA32_C(18), PFM_GEN_IA32_C(19),
+/* pmc20 */ PFM_GEN_IA32_C(20), PFM_GEN_IA32_C(21), PFM_GEN_IA32_C(22), PFM_GEN_IA32_C(23),
+/* pmc24 */ PFM_GEN_IA32_C(24), PFM_GEN_IA32_C(25), PFM_GEN_IA32_C(26), PFM_GEN_IA32_C(27),
+/* pmc28 */ PFM_GEN_IA32_C(28), PFM_GEN_IA32_C(29), PFM_GEN_IA32_C(30), PFM_GEN_IA32_C(31)
+};
+
+static struct pfm_reg_desc pfm_gen_ia32_pmd_desc[]={
+/* pmd0 */ PFM_GEN_IA32_D(0), PFM_GEN_IA32_D(1), PFM_GEN_IA32_D(2), PFM_GEN_IA32_D(3),
+/* pmd4 */ PFM_GEN_IA32_D(4), PFM_GEN_IA32_D(5), PFM_GEN_IA32_D(6), PFM_GEN_IA32_D(7),
+/* pmd8 */ PFM_GEN_IA32_D(8), PFM_GEN_IA32_D(9), PFM_GEN_IA32_D(10), PFM_GEN_IA32_D(11),
+/* pmd12 */ PFM_GEN_IA32_D(12), PFM_GEN_IA32_D(13), PFM_GEN_IA32_D(14), PFM_GEN_IA32_D(15),
+/* pmd16 */ PFM_GEN_IA32_D(16), PFM_GEN_IA32_D(17), PFM_GEN_IA32_D(18), PFM_GEN_IA32_D(19),
+/* pmd20 */ PFM_GEN_IA32_D(20), PFM_GEN_IA32_D(21), PFM_GEN_IA32_D(22), PFM_GEN_IA32_D(23),
+/* pmd24 */ PFM_GEN_IA32_D(24), PFM_GEN_IA32_D(25), PFM_GEN_IA32_D(26), PFM_GEN_IA32_D(27),
+/* pmd28 */ PFM_GEN_IA32_D(28), PFM_GEN_IA32_D(29), PFM_GEN_IA32_D(30), PFM_GEN_IA32_D(31)
+};
+#define PFM_GEN_IA32_MAX_PMCS ARRAY_SIZE(pfm_gen_ia32_pmc_desc)
+
+#define MSR_IA32_MISC_ENABLE_PERF_AVAIL (1<<7) /* read-only status bit */
+
+static struct pfm_pmu_config pfm_gen_ia32_pmu_conf;
+
+static int pfm_gen_ia32_probe_pmu(void)
+{
+ union {
+ unsigned int val;
+ struct pmu_eax eax;
+ } eax;
+ unsigned int ebx, ecx, edx;
+ unsigned int num_cnt;
+ int high, low;
+
+ PFM_INFO("family=%d x86_model=%d",
+ cpu_data->x86, cpu_data->x86_model);
+ /*
+ * check for P6 processor family
+ */
+ if (cpu_data->x86 != 6) {
+ PFM_INFO("unsupported family=%d", cpu_data->x86);
+ return -1;
+ }
+
+ /*
+ * only works on Intel processors
+ */
+ if (cpu_data->x86_vendor != X86_VENDOR_INTEL) {
+ PFM_INFO("not running on Intel processor");
+ return -1;
+ }
+
+ /*
+ * check if CPU supports 0xa function of CPUID
+ * 0xa started with Core Duo/Solo. Needed to detect if
+ * architected PMU is present
+ */
+ cpuid(0x0, &eax.val, &ebx, &ecx, &edx);
+ if (eax.val < 0xa) {
+ PFM_INFO("CPUID 0xa function not supported\n");
+ return -1;
+ }
+
+ cpuid(0xa, &eax.val, &ebx, &ecx, &edx);
+ if (eax.eax.version < 1) {
+ PFM_INFO("architectural perfmon not supported\n");
+ return -1;
+ }
+ num_cnt = eax.eax.num_cnt;
+
+ /*
+ * sanity check number of counters
+ */
+ if (num_cnt == 0 || num_cnt >= PFM_MAX_HW_PMCS) {
+ PFM_INFO("invalid number of counters %u\n", eax.eax.num_cnt);
+ return -1;
+ }
+ /*
+ * instead of dynamically generaint the description table
+ * and MSR addresses, we have a default description with a reasonably
+ * large number of counters (32). We believe this is plenty for quite
+ * some time. Thus allows us to have a much simpler probing and
+ * initialization routine, especially because we have no dynamic
+ * allocation, especially for the counter names
+ */
+ if (num_cnt >= PFM_GEN_IA32_MAX_PMCS) {
+ PFM_INFO("too many counters (max=%d) actual=%u\n",
+ PFM_GEN_IA32_MAX_PMCS, num_cnt);
+ return -1;
+ }
+
+ if (eax.eax.cnt_width > 63) {
+ PFM_INFO("invalid counter width %u\n", eax.eax.cnt_width);
+ return -1;
+ }
+
+ if (!cpu_has_apic) {
+ PFM_INFO("no Local APIC, unsupported");
+ return -1;
+ }
+
+ rdmsr(MSR_IA32_APICBASE, low, high);
+ if ((low & MSR_IA32_APICBASE_ENABLE) == 0) {
+ PFM_INFO("local APIC disabled, you must enable "
+ "with lapic kernel command line option");
+ return -1;
+ }
+ pfm_gen_ia32_pmu_conf.num_pmc_entries = num_cnt;
+ pfm_gen_ia32_pmu_conf.num_pmd_entries = num_cnt;
+
+ return 0;
+}
+
+/*
+ * Counters may have model-specific width. Yet the documentation says
+ * that only the lower 32 bits can be written to. bits [w-32]
+ * are sign extensions of bit 31. As such the effective width of
+ * a counter is 31 bits only.
+ * See IA-32 Intel Architecture Software developer manual Vol 3b:
+ * system programming and section 18.17.2 in particular.
+ */
+static struct pfm_pmu_config pfm_gen_ia32_pmu_conf={
+ .pmu_name = "Generic IA-32",
+ .pmd_desc = pfm_gen_ia32_pmd_desc,
+ .counter_width = 31,
+ .pmc_desc = pfm_gen_ia32_pmc_desc,
+ .probe_pmu = pfm_gen_ia32_probe_pmu,
+ .version = "1.0",
+ .flags = PFM_PMU_BUILTIN_FLAG,
+ .owner = THIS_MODULE,
+ .arch_info = &pfm_gen_ia32_pmu_info
+};
+
+static int __init pfm_gen_ia32_pmu_init_module(void)
+{
+ unsigned int i;
+
+ bitmap_zero(ulp(pfm_gen_ia32_pmu_info.enable_mask), PFM_MAX_HW_PMCS);
+ for(i=0; i < PFM_MAX_HW_PMCS; i++) {
+ if (pfm_gen_ia32_pmu_info.pmc_addrs[i].reg_type & PFM_REGT_SELEN) {
+ pfm_bv_set(pfm_gen_ia32_pmu_info.enable_mask, i);
+ }
+ }
+ return pfm_register_pmu_config(&pfm_gen_ia32_pmu_conf);
+}
+
+static void __exit pfm_gen_ia32_pmu_cleanup_module(void)
+{
+ pfm_unregister_pmu_config(&pfm_gen_ia32_pmu_conf);
+}
+
+module_init(pfm_gen_ia32_pmu_init_module);
+module_exit(pfm_gen_ia32_pmu_cleanup_module);
--- linux-2.6.17.9.base/arch/i386/perfmon/perfmon_p4.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/arch/i386/perfmon/perfmon_p4.c 2006-08-22 04:05:43.000000000 -0700
@@ -0,0 +1,408 @@
+/*
+ * This file contains the P4/Xeon/EM64T PMU register description tables
+ * and pmc checker used by perfmon.c.
+ *
+ * Copyright (c) 2005 Intel Corporation
+ * Contributed by Bryan Wilkerson <bryan.p.wilkerson@...el.com>
+ */
+#include <linux/module.h>
+#include <linux/perfmon.h>
+#include <asm/msr.h>
+#include <asm/apic.h>
+
+MODULE_AUTHOR("Bryan Wilkerson <bryan.p.wilkerson@...el.com>");
+MODULE_DESCRIPTION("P4/Xeon/EM64T PMU description table");
+MODULE_LICENSE("GPL");
+
+/*
+ * CCCR default value:
+ * - OVF_PMI_T0=1 (bit 26)
+ * - OVF_PMI_T1=0 (bit 27) (set if necessary in pfm_write_reg())
+ * - all other bits are zero
+ *
+ * OVF_PMI is force to zero if PFM_REGFL_NO_EMUL64 is set on CCCR
+ */
+#define PFM_CCCR_DFL (PFM_ONE_64<<26)
+
+/*
+ * CCCR reserved fields:
+ * - bits 0-11, 25-29, 31-63
+ * - OVF_PMI (26-27), override with REGFL_NO_EMUL64
+ */
+#define PFM_CCCR_RSVD 0x0000000041fff000
+
+#define PFM_P4_NO64 (3ULL<<26) /* use 3 even in non HT mode */
+
+/*
+ * With HyperThreading enabled:
+ *
+ * The ESCRs and CCCRs are divided in half with the top half
+ * belonging to logical processor 0 and the bottom half going to
+ * logical processor 1. Thus only half of the PMU resources are
+ * accessible to applications.
+ *
+ * PEBS is not available due to the fact that:
+ * - MSR_PEBS_MATRIX_VERT is shared between the threads
+ * - IA32_PEBS_ENABLE is shared between the threads
+ *
+ * With HyperThreading disabled:
+ *
+ * The full set of PMU resources is exposed to applications.
+ *
+ * The mapping is chosen such that PMCxx -> MSR is the same
+ * in HT and non HT mode, if register is present in HT mode.
+ *
+ */
+#define PFM_REGT_NHTESCR (PFM_REGT_ESCR|PFM_REGT_NOHT)
+#define PFM_REGT_NHTCCCR (PFM_REGT_CCCR|PFM_REGT_NOHT)
+#define PFM_REGT_NHTPEBS (PFM_REGT_PEBS|PFM_REGT_NOHT)
+#define PFM_REGT_NHTCTR (PFM_REGT_CTR|PFM_REGT_NOHT)
+
+static struct pfm_arch_pmu_info pfm_p4_pmu_info={
+ .pmc_addrs = {
+ /*pmc 0 */ {{0x3b2, 0x3b3}, 0, PFM_REGT_ESCR}, /* BPU_ESCR0,1 */
+ /*pmc 1 */ {{0x3b4, 0x3b5}, 0, PFM_REGT_ESCR}, /* IS_ESCR0,1 */
+ /*pmc 2 */ {{0x3aa, 0x3ab}, 0, PFM_REGT_ESCR}, /* MOB_ESCR0,1 */
+ /*pmc 3 */ {{0x3b6, 0x3b7}, 0, PFM_REGT_ESCR}, /* ITLB_ESCR0,1 */
+ /*pmc 4 */ {{0x3ac, 0x3ad}, 0, PFM_REGT_ESCR}, /* PMH_ESCR0,1 */
+ /*pmc 5 */ {{0x3c8, 0x3c9}, 0, PFM_REGT_ESCR}, /* IX_ESCR0,1 */
+ /*pmc 6 */ {{0x3a2, 0x3a3}, 0, PFM_REGT_ESCR}, /* FSB_ESCR0,1 */
+ /*pmc 7 */ {{0x3a0, 0x3a1}, 0, PFM_REGT_ESCR}, /* BSU_ESCR0,1 */
+ /*pmc 8 */ {{0x3c0, 0x3c1}, 0, PFM_REGT_ESCR}, /* MS_ESCR0,1 */
+ /*pmc 9 */ {{0x3c4, 0x3c5}, 0, PFM_REGT_ESCR}, /* TC_ESCR0,1 */
+ /*pmc 10*/ {{0x3c2, 0x3c3}, 0, PFM_REGT_ESCR}, /* TBPU_ESCR0,1 */
+ /*pmc 11*/ {{0x3a6, 0x3a7}, 0, PFM_REGT_ESCR}, /* FLAME_ESCR0,1 */
+ /*pmc 12*/ {{0x3a4, 0x3a5}, 0, PFM_REGT_ESCR}, /* FIRM_ESCR0,1 */
+ /*pmc 13*/ {{0x3ae, 0x3af}, 0, PFM_REGT_ESCR}, /* SAAT_ESCR0,1 */
+ /*pmc 14*/ {{0x3b0, 0x3b1}, 0, PFM_REGT_ESCR}, /* U2L_ESCR0,1 */
+ /*pmc 15*/ {{0x3a8, 0x3a9}, 0, PFM_REGT_ESCR}, /* DAC_ESCR0,1 */
+ /*pmc 16*/ {{0x3ba, 0x3bb}, 0, PFM_REGT_ESCR}, /* IQ_ESCR0,1 */
+ /*pmc 17*/ {{0x3ca, 0x3cb}, 0, PFM_REGT_ESCR}, /* ALF_ESCR0,1 */
+ /*pmc 18*/ {{0x3bc, 0x3bd}, 0, PFM_REGT_ESCR}, /* RAT_ESCR0,1 */
+ /*pmc 19*/ {{0x3be, 0}, 0, PFM_REGT_ESCR}, /* SSU_ESCR0 */
+ /*pmc 20*/ {{0x3b8, 0x3b9}, 0, PFM_REGT_ESCR}, /* CRU_ESCR0,1 */
+ /*pmc 21*/ {{0x3cc, 0x3cd}, 0, PFM_REGT_ESCR}, /* CRU_ESCR2,3 */
+ /*pmc 22*/ {{0x3e0, 0x3e1}, 0, PFM_REGT_ESCR}, /* CRU_ESCR4,5 */
+
+ /*pmc 23*/ {{0x360, 0x362}, 0, PFM_REGT_CCCR}, /* BPU_CCCR0,1 */
+ /*pmc 24*/ {{0x361, 0x363}, 1, PFM_REGT_CCCR}, /* BPU_CCCR2,3 */
+ /*pmc 25*/ {{0x364, 0x366}, 2, PFM_REGT_CCCR}, /* MS_CCCR0,1 */
+ /*pmc 26*/ {{0x365, 0x367}, 3, PFM_REGT_CCCR}, /* MS_CCCR2,3 */
+ /*pmc 27*/ {{0x368, 0x36a}, 4, PFM_REGT_CCCR}, /* FLAME_CCCR0,1 */
+ /*pmc 28*/ {{0x369, 0x36b}, 5, PFM_REGT_CCCR}, /* FLAME_CCCR2,3 */
+ /*pmc 29*/ {{0x36c, 0x36e}, 6, PFM_REGT_CCCR}, /* IQ_CCCR0,1 */
+ /*pmc 30*/ {{0x36d, 0x36f}, 7, PFM_REGT_CCCR}, /* IQ_CCCR2,3 */
+ /*pmc 31*/ {{0x370, 0x371}, 8, PFM_REGT_CCCR}, /* IQ_CCCR4,5 */
+ /* non HT extensions */
+ /*pmc 32*/ {{0x3b3, 0}, 0, PFM_REGT_NHTESCR}, /* BPU_ESCR1 */
+ /*pmc 33*/ {{0x3b5, 0}, 0, PFM_REGT_NHTESCR}, /* IS_ESCR1 */
+ /*pmc 34*/ {{0x3ab, 0}, 0, PFM_REGT_NHTESCR}, /* MOB_ESCR1 */
+ /*pmc 35*/ {{0x3b7, 0}, 0, PFM_REGT_NHTESCR}, /* ITLB_ESCR1 */
+ /*pmc 36*/ {{0x3ad, 0}, 0, PFM_REGT_NHTESCR}, /* PMH_ESCR1 */
+ /*pmc 37*/ {{0x3c9, 0}, 0, PFM_REGT_NHTESCR}, /* IX_ESCR1 */
+ /*pmc 38*/ {{0x3a3, 0}, 0, PFM_REGT_NHTESCR}, /* FSB_ESCR1 */
+ /*pmc 39*/ {{0x3a1, 0}, 0, PFM_REGT_NHTESCR}, /* BSU_ESCR1 */
+ /*pmc 40*/ {{0x3c1, 0}, 0, PFM_REGT_NHTESCR}, /* MS_ESCR1 */
+ /*pmc 41*/ {{0x3c5, 0}, 0, PFM_REGT_NHTESCR}, /* TC_ESCR1 */
+ /*pmc 42*/ {{0x3c3, 0}, 0, PFM_REGT_NHTESCR}, /* TBPU_ESCR1 */
+ /*pmc 43*/ {{0x3a7, 0}, 0, PFM_REGT_NHTESCR}, /* FLAME_ESCR1 */
+ /*pmc 44*/ {{0x3a5, 0}, 0, PFM_REGT_NHTESCR}, /* FIRM_ESCR1 */
+ /*pmc 45*/ {{0x3af, 0}, 0, PFM_REGT_NHTESCR}, /* SAAT_ESCR1 */
+ /*pmc 46*/ {{0x3b1, 0}, 0, PFM_REGT_NHTESCR}, /* U2L_ESCR1 */
+ /*pmc 47*/ {{0x3a9, 0}, 0, PFM_REGT_NHTESCR}, /* DAC_ESCR1 */
+ /*pmc 48*/ {{0x3bb, 0}, 0, PFM_REGT_NHTESCR}, /* IQ_ESCR1 */
+ /*pmc 49*/ {{0x3cb, 0}, 0, PFM_REGT_NHTESCR}, /* ALF_ESCR1 */
+ /*pmc 50*/ {{0x3bd, 0}, 0, PFM_REGT_NHTESCR}, /* RAT_ESCR1 */
+ /*pmc 51*/ {{0x3b9, 0}, 0, PFM_REGT_NHTESCR}, /* CRU_ESCR1 */
+ /*pmc 52*/ {{0x3cd, 0}, 0, PFM_REGT_NHTESCR}, /* CRU_ESCR3 */
+ /*pmc 53*/ {{0x3e1, 0}, 0, PFM_REGT_NHTESCR}, /* CRU_ESCR5 */
+ /*pmc 54*/ {{0x362, 0}, 9, PFM_REGT_NHTCCCR}, /* BPU_CCCR1 */
+ /*pmc 55*/ {{0x363, 0},10, PFM_REGT_NHTCCCR}, /* BPU_CCCR3 */
+ /*pmc 56*/ {{0x366, 0},11, PFM_REGT_NHTCCCR}, /* MS_CCCR1 */
+ /*pmc 57*/ {{0x367, 0},12, PFM_REGT_NHTCCCR}, /* MS_CCCR3 */
+ /*pmc 58*/ {{0x36a, 0},13, PFM_REGT_NHTCCCR}, /* FLAME_CCCR1 */
+ /*pmc 59*/ {{0x36b, 0},14, PFM_REGT_NHTCCCR}, /* FLAME_CCCR3 */
+ /*pmc 60*/ {{0x36e, 0},15, PFM_REGT_NHTCCCR}, /* IQ_CCCR1 */
+ /*pmc 61*/ {{0x36f, 0},16, PFM_REGT_NHTCCCR}, /* IQ_CCCR3 */
+ /*pmc 62*/ {{0x371, 0},17, PFM_REGT_NHTCCCR}, /* IQ_CCCR5 */
+ /*pmc 63*/ {{0x3f2, 0}, 0, PFM_REGT_NHTPEBS},/* PEBS_MATRIX_VERT */
+ /*pmc 64*/ {{0x3f1, 0}, 0, PFM_REGT_NHTPEBS} /* PEBS_ENABLE */
+ },
+
+ .pmd_addrs = {
+ /*pmd 0 */ {{0x300, 0x302}, 0, PFM_REGT_CTR}, /* BPU_CRT0,1 */
+ /*pmd 1 */ {{0x301, 0x303}, 0, PFM_REGT_CTR}, /* BPU_CTR2,3 */
+ /*pmd 2 */ {{0x304, 0x306}, 0, PFM_REGT_CTR}, /* MS_CRT0,1 */
+ /*pmd 3 */ {{0x305, 0x307}, 0, PFM_REGT_CTR}, /* MS_CRT2,3 */
+ /*pmd 4 */ {{0x308, 0x30a}, 0, PFM_REGT_CTR}, /* FLAME_CRT0,1 */
+ /*pmd 5 */ {{0x309, 0x30b}, 0, PFM_REGT_CTR}, /* FLAME_CRT2,3 */
+ /*pmd 6 */ {{0x30c, 0x30e}, 0, PFM_REGT_CTR}, /* IQ_CRT0,1 */
+ /*pmd 7 */ {{0x30d, 0x30f}, 0, PFM_REGT_CTR}, /* IQ_CRT2,3 */
+ /*pmd 8 */ {{0x310, 0x311}, 0, PFM_REGT_CTR}, /* IQ_CRT4,5 */
+ /*
+ * non HT extensions
+ */
+ /*pmd 9 */ {{0x302, 0}, 0, PFM_REGT_NHTCTR}, /* BPU_CRT1 */
+ /*pmd 10*/ {{0x303, 0}, 0, PFM_REGT_NHTCTR}, /* BPU_CTR3 */
+ /*pmd 11*/ {{0x306, 0}, 0, PFM_REGT_NHTCTR}, /* MS_CRT1 */
+ /*pmd 12*/ {{0x307, 0}, 0, PFM_REGT_NHTCTR}, /* MS_CRT3 */
+ /*pmd 13*/ {{0x30a, 0}, 0, PFM_REGT_NHTCTR}, /* FLAME_CRT1 */
+ /*pmd 14*/ {{0x30b, 0}, 0, PFM_REGT_NHTCTR}, /* FLAME_CRT3 */
+ /*pmd 15*/ {{0x30e, 0}, 0, PFM_REGT_NHTCTR}, /* IQ_CRT1 */
+ /*pmd 16*/ {{0x30f, 0}, 0, PFM_REGT_NHTCTR}, /* IQ_CRT3 */
+ /*pmd 17*/ {{0x311, 0}, 0, PFM_REGT_NHTCTR}, /* IQ_CRT5 */
+ },
+ .pebs_ctr_idx = 8, /* thread0: IQ_CTR4, thread1: IQ_CTR5 */
+ .pmu_style = PFM_X86_PMU_P4,
+};
+
+static struct pfm_reg_desc pfm_p4_pmc_desc[]={
+/* pmc0 */ PMC_D(PFM_REG_I, "BPU_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc1 */ PMC_D(PFM_REG_I, "IS_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc2 */ PMC_D(PFM_REG_I, "MOB_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc3 */ PMC_D(PFM_REG_I, "ITLB_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc4 */ PMC_D(PFM_REG_I, "PMH_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc5 */ PMC_D(PFM_REG_I, "IX_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc6 */ PMC_D(PFM_REG_I, "FSB_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc7 */ PMC_D(PFM_REG_I, "BSU_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc8 */ PMC_D(PFM_REG_I, "MS_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc9 */ PMC_D(PFM_REG_I, "TC_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc10 */ PMC_D(PFM_REG_I, "TBPU_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc11 */ PMC_D(PFM_REG_I, "FLAME_ESCR0", 0x0, PFM_ESCR_RSVD, 0),
+/* pmc12 */ PMC_D(PFM_REG_I, "FIRM_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc13 */ PMC_D(PFM_REG_I, "SAAT_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc14 */ PMC_D(PFM_REG_I, "U2L_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc15 */ PMC_D(PFM_REG_I, "DAC_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc16 */ PMC_D(PFM_REG_I, "IQ_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc17 */ PMC_D(PFM_REG_I, "ALF_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc18 */ PMC_D(PFM_REG_I, "RAT_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc19 */ PMC_D(PFM_REG_I, "SSU_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc20 */ PMC_D(PFM_REG_I, "CRU_ESCR0" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc21 */ PMC_D(PFM_REG_I, "CRU_ESCR2" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc22 */ PMC_D(PFM_REG_I, "CRU_ESCR4" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc23 */ PMC_D(PFM_REG_I64, "BPU_CCCR0" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc24 */ PMC_D(PFM_REG_I64, "BPU_CCCR2" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc25 */ PMC_D(PFM_REG_I64, "MS_CCCR0" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc26 */ PMC_D(PFM_REG_I64, "MS_CCCR2" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc27 */ PMC_D(PFM_REG_I64, "FLAME_CCCR0", PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc28 */ PMC_D(PFM_REG_I64, "FLAME_CCCR2", PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc29 */ PMC_D(PFM_REG_I64, "IQ_CCCR0" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc30 */ PMC_D(PFM_REG_I64, "IQ_CCCR2" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc31 */ PMC_D(PFM_REG_I64, "IQ_CCCR4" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+ /* No HT extension */
+/* pmc32 */ PMC_D(PFM_REG_I, "BPU_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc33 */ PMC_D(PFM_REG_I, "IS_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc34 */ PMC_D(PFM_REG_I, "MOB_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc35 */ PMC_D(PFM_REG_I, "ITLB_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc36 */ PMC_D(PFM_REG_I, "PMH_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc37 */ PMC_D(PFM_REG_I, "IX_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc38 */ PMC_D(PFM_REG_I, "FSB_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc39 */ PMC_D(PFM_REG_I, "BSU_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc40 */ PMC_D(PFM_REG_I, "MS_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc41 */ PMC_D(PFM_REG_I, "TC_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc42 */ PMC_D(PFM_REG_I, "TBPU_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc43 */ PMC_D(PFM_REG_I, "FLAME_ESCR1", 0x0, PFM_ESCR_RSVD, 0),
+/* pmc44 */ PMC_D(PFM_REG_I, "FIRM_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc45 */ PMC_D(PFM_REG_I, "SAAT_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc46 */ PMC_D(PFM_REG_I, "U2L_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc47 */ PMC_D(PFM_REG_I, "DAC_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc48 */ PMC_D(PFM_REG_I, "IQ_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc49 */ PMC_D(PFM_REG_I, "ALF_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc50 */ PMC_D(PFM_REG_I, "RAT_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc51 */ PMC_D(PFM_REG_I, "CRU_ESCR1" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc52 */ PMC_D(PFM_REG_I, "CRU_ESCR3" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc53 */ PMC_D(PFM_REG_I, "CRU_ESCR5" , 0x0, PFM_ESCR_RSVD, 0),
+/* pmc54 */ PMC_D(PFM_REG_I64, "BPU_CCCR1" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc55 */ PMC_D(PFM_REG_I64, "BPU_CCCR3" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc56 */ PMC_D(PFM_REG_I64, "MS_CCCR1" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc57 */ PMC_D(PFM_REG_I64, "MS_CCCR3" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc58 */ PMC_D(PFM_REG_I64, "FLAME_CCCR1", PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc59 */ PMC_D(PFM_REG_I64, "FLAME_CCCR3", PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc60 */ PMC_D(PFM_REG_I64, "IQ_CCCR1" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc61 */ PMC_D(PFM_REG_I64, "IQ_CCCR3" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc62 */ PMC_D(PFM_REG_I64, "IQ_CCCR5" , PFM_CCCR_DFL, PFM_CCCR_RSVD, PFM_P4_NO64),
+/* pmc63 */ PMC_D(PFM_REG_I, "PEBS_MATRIX_VERT", 0, 0x13, 0),
+/* pmc64 */ PMC_D(PFM_REG_I, "PEBS_ENABLE", 0, 0x3000fff, 0)
+};
+#define PFM_P4_NUM_PMCS ARRAY_SIZE(pfm_p4_pmc_desc)
+
+/*
+ * See section 15.10.6.6 for details about the IQ block
+ */
+static struct pfm_reg_desc pfm_p4_pmd_desc[]={
+/* pmd0 */ PMD_D(PFM_REG_C, "BPU_CTR0" ),
+/* pmd1 */ PMD_D(PFM_REG_C, "BPU_CTR2" ),
+/* pmd2 */ PMD_D(PFM_REG_C, "MS_CTR0" ),
+/* pmd3 */ PMD_D(PFM_REG_C, "MS_CTR2" ),
+/* pmd4 */ PMD_D(PFM_REG_C, "FLAME_CTR0" ),
+/* pmd5 */ PMD_D(PFM_REG_C, "FLAME_CTR2" ),
+/* pmd6 */ PMD_D(PFM_REG_C, "IQ_CTR0" ),
+/* pmd7 */ PMD_D(PFM_REG_C, "IQ_CTR2" ),
+/* pmd8 */ PMD_D(PFM_REG_C, "IQ_CTR4" ),
+ /* no HT extension */
+/* pmd9 */ PMD_D(PFM_REG_C, "BPU_CTR1" ),
+/* pmd10 */ PMD_D(PFM_REG_C, "BPU_CTR3" ),
+/* pmd11 */ PMD_D(PFM_REG_C, "MS_CTR1" ),
+/* pmd12 */ PMD_D(PFM_REG_C, "MS_CTR3" ),
+/* pmd13 */ PMD_D(PFM_REG_C, "FLAME_CTR1" ),
+/* pmd14 */ PMD_D(PFM_REG_C, "FLAME_CTR3" ),
+/* pmd15 */ PMD_D(PFM_REG_C, "IQ_CTR1" ),
+/* pmd16 */ PMD_D(PFM_REG_C, "IQ_CTR3" ),
+/* pmd17 */ PMD_D(PFM_REG_C, "IQ_CTR5" )
+};
+#define PFM_P4_NUM_PMDS ARRAY_SIZE(pfm_p4_pmd_desc)
+
+#define MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL (1<<12) /* PEBS unavailable */
+#define cpu_has_dts boot_cpu_has(X86_FEATURE_DTES)
+
+static int pfm_p4_probe_pmu(void)
+{
+ int high, low;
+ unsigned int i, num_ht;
+
+ PFM_INFO("family=%d x86_model=%d",
+ cpu_data->x86,
+ cpu_data->x86_model);
+ /*
+ * must be family 15
+ */
+ if (cpu_data->x86 != 15) {
+ PFM_INFO("unsupported family=%d", cpu_data->x86);
+ return -1;
+ }
+
+ /*
+ * only works on Intel processors
+ */
+ if (cpu_data->x86_vendor != X86_VENDOR_INTEL) {
+ PFM_INFO("not running on Intel processor");
+ return -1;
+ }
+
+ switch(cpu_data->x86_model) {
+ case 1:
+ PFM_INFO("Willamette P4 detected");
+ break;
+ case 2:
+ PFM_INFO("Northwood P4 detected");
+ break;
+ case 3: /* Pentium 4 505, 520, 540, 550 */
+ case 4:
+ case 5: /* incl. some Celeron D */
+ case 0:
+ PFM_INFO("P4 detected");
+ break;
+ case 6:
+ PFM_INFO("Pentium D or Extreme Edition detected");
+ break;
+ default:
+ /*
+ * do not know if they all work the same, so reject
+ * for now
+ */
+ PFM_INFO("unknown model %d", cpu_data->x86_model);
+ return -1;
+ }
+
+ /*
+ * check for local APIC (required)
+ */
+ if (!cpu_has_apic) {
+ PFM_INFO("no local APIC, unsupported");
+ return -1;
+ }
+ rdmsr(MSR_IA32_APICBASE, low, high);
+ if ((low & MSR_IA32_APICBASE_ENABLE) == 0)
+ PFM_INFO("Local APIC in 3-wire mode");
+
+#ifdef CONFIG_SMP
+ num_ht = cpus_weight(cpu_sibling_map[0]);
+#else
+ num_ht = 1;
+#endif
+
+ PFM_INFO("cores/package=%d threads/core=%d",
+ cpu_data->x86_max_cores,
+ num_ht);
+
+ if (cpu_has_ht) {
+
+ PFM_INFO("HyperThreading supported, status %s",
+ num_ht > 1 ? "on": "off");
+ /*
+ * disable registers not supporting HT
+ */
+ if (num_ht > 1) {
+ PFM_INFO("disabling half the registers for HT");
+ for (i = 0; i < PFM_P4_NUM_PMCS; i++) {
+ if (pfm_p4_pmu_info.pmc_addrs[(i)].reg_type &
+ PFM_REGT_NOHT)
+ pfm_p4_pmc_desc[i].type = PFM_REG_NA;
+ }
+ for (i = 0; i < PFM_P4_NUM_PMDS; i++) {
+ if (pfm_p4_pmu_info.pmd_addrs[(i)].reg_type &
+ PFM_REGT_NOHT)
+ pfm_p4_pmd_desc[i].type = PFM_REG_NA;
+ }
+ }
+ }
+
+ if (cpu_has_dts) {
+ PFM_INFO("Data Save Area (DS) supported");
+
+ pfm_p4_pmu_info.flags = PFM_X86_PMU_DS;
+
+ rdmsr(MSR_IA32_MISC_ENABLE, low, high);
+ if ((low & MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL) == 0) {
+ /*
+ * PEBS does not work with HyperThreading enabled
+ */
+ if (num_ht == 1) {
+ pfm_p4_pmu_info.flags |= PFM_X86_PMU_PEBS;
+ PFM_INFO("PEBS supported, status on");
+ } else {
+ PFM_INFO("PEBS supported, status off (because of HT)");
+ }
+ }
+ }
+ PFM_INFO("NMI watchdog=%d\n", nmi_watchdog);
+ return 0;
+}
+
+static struct pfm_pmu_config pfm_p4_pmu_conf={
+ .pmu_name = "Intel P4/Xeon/EM64T",
+ .counter_width = 40,
+ .pmd_desc = pfm_p4_pmd_desc,
+ .pmc_desc = pfm_p4_pmc_desc,
+ .num_pmc_entries = PFM_P4_NUM_PMCS,
+ .num_pmd_entries = PFM_P4_NUM_PMDS,
+ .probe_pmu = pfm_p4_probe_pmu,
+ .version = "1.0",
+ .flags = PFM_PMU_BUILTIN_FLAG,
+ .owner = THIS_MODULE,
+ .arch_info = &pfm_p4_pmu_info
+};
+
+static int __init pfm_p4_pmu_init_module(void)
+{
+ unsigned int i;
+
+ /*
+ * compute enable bitmask
+ */
+ bitmap_zero(ulp(pfm_p4_pmu_info.enable_mask), PFM_MAX_HW_PMCS);
+ for(i=0; i < PFM_MAX_HW_PMCS; i++) {
+ if (pfm_p4_pmu_info.pmc_addrs[i].reg_type & PFM_REGT_CCCR) {
+ pfm_bv_set(pfm_p4_pmu_info.enable_mask, i);
+ }
+ }
+ return pfm_register_pmu_config(&pfm_p4_pmu_conf);
+}
+
+static void __exit pfm_p4_pmu_cleanup_module(void)
+{
+ pfm_unregister_pmu_config(&pfm_p4_pmu_conf);
+}
+
+module_init(pfm_p4_pmu_init_module);
+module_exit(pfm_p4_pmu_cleanup_module);
--- linux-2.6.17.9.base/arch/i386/perfmon/perfmon_p4_pebs_smpl.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/arch/i386/perfmon/perfmon_p4_pebs_smpl.c 2006-08-21 03:37:46.000000000 -0700
@@ -0,0 +1,219 @@
+/*
+ * Copyright (c) 2005-2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@....hp.com>
+ *
+ * This file implements the PEBS sampling format for 32-bit
+ * Pentium 4/Xeon processors. it does not work with Intel EM64T
+ * processors.
+ */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/sysctl.h>
+#include <asm/msr.h>
+
+#include <linux/perfmon.h>
+#include <asm/perfmon_p4_pebs_smpl.h>
+
+#ifndef __i386__
+#error "this module is for the 32-bit Pentium 4/Xeon processors"
+#endif
+
+MODULE_AUTHOR("Stephane Eranian <eranian@....hp.com>");
+MODULE_DESCRIPTION("Intel 32-bit P4/Xeon PEBS sampling");
+MODULE_LICENSE("GPL");
+
+static int pfm_pebs_fmt_validate(u32 flags, u16 npmds, void *data)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ struct pfm_p4_pebs_smpl_arg *arg = data;
+ size_t min_buf_size;
+
+ /*
+ * host CPU does not have PEBS support
+ */
+ if ((arch_info->flags & PFM_X86_PMU_PEBS) == 0) {
+ PFM_DBG("host PMU does not support PEBS sampling");
+ return -EINVAL;
+ }
+
+ /*
+ * need to define at least the size of the buffer
+ */
+ if (data == NULL) {
+ PFM_DBG("no argument passed");
+ return -EINVAL;
+ }
+
+ /*
+ * compute min buf size. npmds is the maximum number
+ * of implemented PMD registers.
+ */
+ min_buf_size = sizeof(struct pfm_p4_pebs_smpl_hdr) +
+ sizeof(struct pfm_p4_pebs_smpl_entry);
+
+ PFM_DBG("validate flags=0x%x min_buf_size=%zu buf_size=%zu",
+ flags, min_buf_size, arg->buf_size);
+
+ /*
+ * must hold at least the buffer header + one minimally sized entry
+ */
+ if (arg->buf_size < min_buf_size)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int pfm_pebs_fmt_get_size(unsigned int flags, void *data, size_t *size)
+{
+ struct pfm_p4_pebs_smpl_arg *arg = data;
+
+ /*
+ * size has been validated in pebs_fmt_validate()
+ */
+ *size = arg->buf_size + 256;
+
+ return 0;
+}
+
+static int pfm_pebs_fmt_init(struct pfm_context *ctx, void *buf,
+ u32 flags, u16 npmds, void *data)
+{
+ struct pfm_arch_context *ctx_arch;
+ struct pfm_p4_pebs_smpl_hdr *hdr;
+ struct pfm_p4_pebs_smpl_arg *arg = data;
+ unsigned long base;
+ struct pfm_p4_ds_area *ds;
+
+ ctx_arch = pfm_ctx_arch(ctx);
+
+ hdr = buf;
+ ds = &hdr->hdr_ds;
+
+ hdr->hdr_version = PFM_P4_PEBS_SMPL_VERSION;
+ hdr->hdr_buf_size = arg->buf_size;
+ hdr->hdr_overflows = 0;
+
+ /*
+ * align base
+ */
+ base = ((unsigned long)(hdr+1) + 256) & ~0xffUL;
+ hdr->hdr_start_offs = base - (unsigned long)(hdr+1);
+ ds->pebs_buf_base = base;
+ ds->pebs_abs_max = base + arg->buf_size + 1;
+ ds->pebs_intr_thres = base +
+ arg->intr_thres *
+ sizeof(struct pfm_p4_pebs_smpl_entry);
+ ds->pebs_index = base;
+
+ /*
+ * save counter reset value for IQ_CCCR4 (thread0) or IQ_CCCR5 (thread1)
+ */
+ ds->pebs_cnt_reset = arg->cnt_reset;
+
+ /*
+ * keep track of DS AREA
+ */
+ ctx_arch->ds_area = ds;
+
+ PFM_DBG("buffer=%p buf_size=%zu ctx_flags=0x%x pebs_base=0x%x "
+ "pebs_max=0x%x pebs_thres=0x%x cnt_reset=0x%llx",
+ buf,
+ hdr->hdr_buf_size,
+ ctx_arch->flags,
+ ds->pebs_buf_base,
+ ds->pebs_abs_max,
+ ds->pebs_intr_thres,
+ (unsigned long long)ds->pebs_cnt_reset);
+
+ return 0;
+}
+
+static int pfm_pebs_fmt_handler(void *buf, struct pfm_ovfl_arg *arg,
+ unsigned long ip, u64 tstamp, void *data)
+{
+ struct pfm_p4_pebs_smpl_hdr *hdr;
+
+ hdr = buf;
+
+ PFM_DBG_ovfl("buffer full");
+ /*
+ * increment number of buffer overflows.
+ * important to detect duplicate set of samples.
+ */
+ hdr->hdr_overflows++;
+
+ /*
+ * request notification and masking of monitoring.
+ * Notification is still subject to the overflowed
+ * register having the FL_NOTIFY flag set.
+ */
+ arg->ovfl_ctrl = PFM_OVFL_CTRL_NOTIFY| PFM_OVFL_CTRL_MASK;
+
+ return -ENOBUFS; /* we are full, sorry */
+}
+
+static int pfm_pebs_fmt_restart(int is_active, pfm_flags_t *ovfl_ctrl,
+ void *buf)
+{
+ struct pfm_p4_pebs_smpl_hdr *hdr = buf;
+
+ /*
+ * reset index to base of buffer
+ */
+ hdr->hdr_ds.pebs_index = hdr->hdr_ds.pebs_buf_base;
+
+ *ovfl_ctrl = PFM_OVFL_CTRL_RESET;
+
+ return 0;
+}
+
+static int pfm_pebs_fmt_exit(void *buf)
+{
+ return 0;
+}
+
+static struct pfm_smpl_fmt pebs_fmt={
+ .fmt_name = "P4-PEBS-32bit",
+ .fmt_uuid = PFM_P4_PEBS_SMPL_UUID,
+ .fmt_arg_size = sizeof(struct pfm_p4_pebs_smpl_arg),
+ .fmt_validate = pfm_pebs_fmt_validate,
+ .fmt_getsize = pfm_pebs_fmt_get_size,
+ .fmt_init = pfm_pebs_fmt_init,
+ .fmt_handler = pfm_pebs_fmt_handler,
+ .fmt_restart = pfm_pebs_fmt_restart,
+ .fmt_exit = pfm_pebs_fmt_exit,
+ .fmt_flags = PFM_FMT_BUILTIN_FLAG,
+ .owner = THIS_MODULE,
+};
+
+#define MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL (1<<12) /* PEBS unavailable */
+#define cpu_has_dts boot_cpu_has(X86_FEATURE_DTES)
+
+static int __init pfm_pebs_fmt_init_module(void)
+{
+ int low, high;
+
+ if (!cpu_has_dts) {
+ PFM_INFO("processor does not have Data Save Area (DS)");
+ return -1;
+ }
+ rdmsr(MSR_IA32_MISC_ENABLE, low, high);
+
+ if (low & MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL) {
+ PFM_INFO("processor does not support PEBS");
+ return -1;
+ }
+ return pfm_register_smpl_fmt(&pebs_fmt);
+}
+
+static void __exit pfm_pebs_fmt_cleanup_module(void)
+{
+ pfm_unregister_smpl_fmt(pebs_fmt.fmt_uuid);
+}
+
+module_init(pfm_pebs_fmt_init_module);
+module_exit(pfm_pebs_fmt_cleanup_module);
--- linux-2.6.17.9.base/arch/i386/perfmon/perfmon_p6.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/arch/i386/perfmon/perfmon_p6.c 2006-08-21 03:37:46.000000000 -0700
@@ -0,0 +1,156 @@
+/*
+ * This file contains the P6 family processor PMU register description tables
+ * and pmc checker used by perfmon.c. This module support original P6 processors
+ * (Pentium II, Pentium Pro, Pentium III) and Pentium M.
+ *
+ * Copyright (c) 2005-2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@....hp.com>
+ */
+#include <linux/module.h>
+#include <linux/perfmon.h>
+#include <asm/msr.h>
+#include <asm/apic.h>
+
+MODULE_AUTHOR("Stephane Eranian <eranian@....hp.com>");
+MODULE_DESCRIPTION("P6 PMU description table");
+MODULE_LICENSE("GPL");
+
+/*
+ * - upper 32 bits are reserved
+ * - INT: APIC enable bit is reserved (forced to 1)
+ * - bit 21 is reserved
+ */
+#define PFM_P6_PMC_RSVD ~((0xffffffffULL<<32) \
+ | (PFM_ONE_64<<20) \
+ | (PFM_ONE_64<<21))
+
+/*
+ * force Local APIC interrupt on overflow
+ * disable with NO_EMUL64
+ */
+#define PFM_P6_PMC_VAL (PFM_ONE_64<<20)
+#define PFM_P6_NO64 (PFM_ONE_64<<20)
+
+/*
+ * physical addresses of MSR control the perfsel and perfctr registers
+ */
+struct pfm_arch_pmu_info pfm_p6_pmu_info={
+ .pmc_addrs = {
+ {{MSR_P6_EVNTSEL0, 0}, 0, PFM_REGT_SELEN}, /* has enable bit */
+ {{MSR_P6_EVNTSEL1, 0}, 1, PFM_REGT_SEL} /* no enable bit */
+ },
+ .pmd_addrs = {
+ {{MSR_P6_PERFCTR0, 0}, 0, PFM_REGT_CTR},
+ {{MSR_P6_PERFCTR1, 0}, 0, PFM_REGT_CTR}
+ },
+ .pmu_style = PFM_X86_PMU_P6,
+};
+
+static struct pfm_reg_desc pfm_p6_pmc_desc[]={
+/* pmc0 */ PMC_D(PFM_REG_I64, "PERFEVTSEL0", PFM_P6_PMC_VAL, PFM_P6_PMC_RSVD, PFM_P6_NO64),
+/* pmc1 */ PMC_D(PFM_REG_I64, "PERFEVTSEL1", PFM_P6_PMC_VAL, PFM_P6_PMC_RSVD, PFM_P6_NO64),
+};
+#define PFM_P6_NUM_PMCS ARRAY_SIZE(pfm_p6_pmc_desc)
+
+static struct pfm_reg_desc pfm_p6_pmd_desc[]={
+/* pmd0 */ PMD_D(PFM_REG_C , "PERFCTR0"),
+/* pmd1 */ PMD_D(PFM_REG_C , "PERFCTR1")
+};
+#define PFM_P6_NUM_PMDS ARRAY_SIZE(pfm_p6_pmd_desc)
+
+#define MSR_IA32_MISC_ENABLE_PERF_AVAIL (1<<7) /* read-only status bit */
+
+static int pfm_p6_probe_pmu(void)
+{
+ int high, low;
+
+ PFM_INFO("family=%d x86_model=%d",
+ cpu_data->x86, cpu_data->x86_model);
+ /*
+ * check for P6 processor family
+ */
+ if (cpu_data->x86 != 6) {
+ PFM_INFO("unsupported family=%d", cpu_data->x86);
+ return -1;
+ }
+
+ switch(cpu_data->x86_model) {
+ case 3:
+ PFM_INFO("Pentium II PMU detected");
+ break;
+
+ case 7 ... 11:
+ PFM_INFO("P6 core PMU detected");
+ break;
+ case 13:
+ rdmsr(MSR_IA32_MISC_ENABLE, low, high);
+ if ((low & MSR_IA32_MISC_ENABLE_PERF_AVAIL) == 0) {
+ PFM_INFO("Pentium M without PMU");
+ return -1;
+ }
+ PFM_INFO("Pentium M PMU detected");
+ break;
+ default:
+ PFM_INFO("unsupported CPU model %d",
+ cpu_data->x86_model);
+ return -1;
+
+ }
+
+ if (!cpu_has_apic) {
+ PFM_INFO("no Local APIC, unsupported");
+ return -1;
+ }
+
+ rdmsr(MSR_IA32_APICBASE, low, high);
+ if ((low & MSR_IA32_APICBASE_ENABLE) == 0) {
+ PFM_INFO("local APIC disabled, you must enable "
+ "with lapic kernel command line option");
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * Counters have 40 bits implemented. However they are designed such
+ * that bits [32-39] are sign extensions of bit 31. As such the
+ * effective width of a counter for P6-like PMU is 31 bits only.
+ *
+ * See IA-32 Intel Architecture Software developer manual Vol 3b:
+ * system programming and section 18.17.2 in particular.
+ */
+static struct pfm_pmu_config pfm_p6_pmu_conf={
+ .pmu_name = "Intel P6 processor Family",
+ .counter_width = 31,
+ .pmd_desc = pfm_p6_pmd_desc,
+ .pmc_desc = pfm_p6_pmc_desc,
+ .num_pmc_entries = PFM_P6_NUM_PMCS,
+ .num_pmd_entries = PFM_P6_NUM_PMDS,
+ .probe_pmu = pfm_p6_probe_pmu,
+ .version = "1.0",
+ .flags = PFM_PMU_BUILTIN_FLAG,
+ .owner = THIS_MODULE,
+ .arch_info = &pfm_p6_pmu_info
+};
+
+static int __init pfm_p6_pmu_init_module(void)
+{
+ unsigned int i;
+ /*
+ * XXX: could be hardcoded for this PMU model
+ */
+ bitmap_zero(ulp(pfm_p6_pmu_info.enable_mask), PFM_MAX_HW_PMCS);
+ for(i=0; i < PFM_MAX_HW_PMCS; i++) {
+ if (pfm_p6_pmu_info.pmc_addrs[i].reg_type & PFM_REGT_SELEN)
+ pfm_bv_set(pfm_p6_pmu_info.enable_mask, i);
+ }
+ return pfm_register_pmu_config(&pfm_p6_pmu_conf);
+}
+
+static void __exit pfm_p6_pmu_cleanup_module(void)
+{
+ pfm_unregister_pmu_config(&pfm_p6_pmu_conf);
+}
+
+module_init(pfm_p6_pmu_init_module);
+module_exit(pfm_p6_pmu_cleanup_module);
--- linux-2.6.17.9.base/include/asm-i386/perfmon.h 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/include/asm-i386/perfmon.h 2006-08-21 03:37:46.000000000 -0700
@@ -0,0 +1,281 @@
+/*
+ * Copyright (c) 2005-2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@....hp.com>
+ *
+ * This file contains X86 Processor Family specific definitions
+ * for the perfmon interface. This covers P6, Pentium M, P4/Xeon
+ * (32-bit and 64-bit, i.e., EM64T) and AMD X86-64.
+ *
+ * This file MUST never be included directly. Use linux/perfmon.h.
+ */
+#ifndef _ASM_I386_PERFMON_H_
+#define _ASM_I386_PERFMON_H_
+
+#ifdef __KERNEL__
+
+#ifdef CONFIG_4KSTACKS
+#define PFM_ARCH_PMD_STK_ARG 2
+#define PFM_ARCH_PMC_STK_ARG 2
+#else
+#define PFM_ARCH_PMD_STK_ARG 4 /* about 700 bytes of stack space */
+#define PFM_ARCH_PMC_STK_ARG 4 /* about 200 bytes of stack space */
+#endif
+
+#include <asm/desc.h>
+#include <asm/apic.h>
+
+/*
+ * For P4/Xeon/EM64T:
+ * - bits 31 - 63 reserved
+ * - T1_OS and T1_USR bits are reserved - set depending on logical proc
+ * user mode application should use T0_OS and T0_USR to indicate
+ */
+#define PFM_ESCR_RSVD 0x000000007ffffffc
+
+/*
+ * bitmask for reg_type
+ * layout:
+ * bit 00-15: reg_type (1 bit set)
+ * bit 16-31: attribute (can be ORed with bit 0-15)
+ */
+#define PFM_REGT_NA 0x00 /* not available */
+#define PFM_REGT_SELEN 0x01 /* P6/AMD: PERFSEL with enable bit22 */
+#define PFM_REGT_SEL 0x02 /* P6: PERFSEL no enable bit */
+#define PFM_REGT_ESCR 0x04 /* P4: ESCR */
+#define PFM_REGT_CCCR 0x08 /* P4: CCCR (enable bit) */
+#define PFM_REGT_CTR 0x10 /* P4/P6/AMD: counter */
+#define PFM_REGT_PEBS 0x20 /* P4: PEBS related */
+#define PFM_REGT_NOHT 0x10000 /* P4: no available with HT */
+
+/*
+ * This design and the partitioning of resources for SMT (hyper threads)
+ * is very static and limited due to limitations in the number of ESCRs
+ * and CCCRs per group.
+ */
+#define MAX_SMT_ID 1
+
+/*
+ * For extended register information in addition to address that is used
+ * at runtime to figure out the mapping of reg addresses to logical procs
+ * and association of registers to hardware specific features
+ */
+struct pfm_arch_ext_reg {
+ /*
+ * one each for the logical CPUs. Index 0 corresponds to T0 and
+ * index 1 corresponds to T1. Index 1 can be zero if no T1
+ * complement reg exists.
+ */
+ unsigned long addrs[MAX_SMT_ID+1];
+ unsigned int ctr; /* for CCCR/PERFEVTSEL, associated counter */
+ unsigned int reg_type;
+};
+
+struct pfm_arch_pmu_info {
+ struct pfm_arch_ext_reg pmc_addrs[PFM_MAX_HW_PMCS];
+ struct pfm_arch_ext_reg pmd_addrs[PFM_MAX_HW_PMDS];
+ u64 enable_mask[PFM_PMC_BV]; /* PMC registers with enable bit */
+
+ u16 pebs_ctr_idx; /* index of PEBS IQ_CTR4 counter (for overflow) */
+ u16 flags; /* PMU feature flags */
+ u8 pmu_style; /* type of PMU interface (P4, P6) */
+};
+/*
+ * X86 PMU style
+ */
+
+#define PFM_X86_PMU_P4 1 /* Intel P4/Xeon/EM64T processor PMU */
+#define PFM_X86_PMU_P6 2 /* Intel P6/Pentium M, AMD X86-64 processor PMU */
+
+/*
+ * PMU feature flags
+ */
+#define PFM_X86_PMU_DS 0x1 /* Intel: support for Data Save Area (DS) */
+#define PFM_X86_PMU_PEBS 0x2 /* Intel: support PEBS (implies DS) */
+
+void __pfm_read_reg(const struct pfm_arch_ext_reg *xreg, u64 *val);
+void __pfm_write_reg(const struct pfm_arch_ext_reg *xreg, u64 val);
+
+static inline void pfm_arch_resend_irq(void)
+{
+ unsigned long val, dest;
+ /*
+ * we cannot use hw_resend_irq() because it goes to
+ * the I/O APIC. We need to go to the Local Apic.
+ *
+ * The "int vec" is not the right solution either
+ * because it triggers a software intr. We need
+ * to regenerate the intr. and have it pended until
+ * we unmask interrupts.
+ *
+ * Instead we send ourself an IPI on the perfmon
+ * vector.
+ */
+ val = APIC_DEST_SELF|APIC_INT_ASSERT|
+ APIC_DM_FIXED|LOCAL_PERFMON_VECTOR;
+ dest = apic_read(APIC_ID);
+ apic_write(APIC_ICR2, dest);
+ apic_write(APIC_ICR, val);
+
+}
+
+#define pfm_arch_serialize() /* nothing */
+
+static inline u64 pfm_arch_get_itc(void)
+{
+ u64 tmp;
+ rdtscll(tmp);
+ return tmp;
+}
+
+static inline void pfm_arch_write_pmc(struct pfm_context *ctx, unsigned int cnum, u64 value)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ /*
+ * we only write to the actual register when monitoring is
+ * active (pfm_start was issued)
+ */
+ if (ctx && ctx->flags.started == 0) return;
+
+ __pfm_write_reg(&arch_info->pmc_addrs[cnum], value);
+}
+
+static inline void pfm_arch_write_pmd(struct pfm_context *ctx, unsigned int cnum, u64 value)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+
+ /*
+ * force upper bit set for counter to ensure overflow
+ */
+ if (arch_info->pmd_addrs[cnum].reg_type & PFM_REGT_CTR)
+ value |= ~pfm_pmu_conf->ovfl_mask;
+
+ __pfm_write_reg(&arch_info->pmd_addrs[cnum], value);
+}
+
+static inline u64 pfm_arch_read_pmd(struct pfm_context *ctx, unsigned int cnum)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ u64 tmp;
+ __pfm_read_reg(&arch_info->pmd_addrs[cnum], &tmp);
+ return tmp;
+}
+
+static inline u64 pfm_arch_read_pmc(struct pfm_context *ctx, unsigned int cnum)
+{
+ struct pfm_arch_pmu_info *arch_info = pfm_pmu_conf->arch_info;
+ u64 tmp;
+ __pfm_read_reg(&arch_info->pmc_addrs[cnum], &tmp);
+ return tmp;
+}
+/*
+ * At certain points, perfmon needs to know if monitoring has been
+ * explicitely started/stopped by user via pfm_start/pfm_stop. The
+ * information is tracked in flags.started. However on certain
+ * architectures, it may be possible to start/stop directly from
+ * user level with a single assembly instruction bypassing
+ * the kernel. This function must be used to determine by
+ * an arch-specific mean if monitoring is actually started/stopped.
+ * If there is no other way but to go through pfm_start/pfm_stop
+ * then this function can simply return 0
+ */
+static inline int pfm_arch_is_active(struct pfm_context *ctx)
+{
+ return 0;
+}
+
+static inline void pfm_arch_ctxswout_sys(struct task_struct *task,
+ struct pfm_context *ctx, struct pfm_event_set *set)
+{}
+
+static inline void pfm_arch_ctxswin_sys(struct task_struct *task,
+ struct pfm_context *ctx, struct pfm_event_set *set)
+{}
+
+void pfm_arch_init_percpu(void);
+int pfm_arch_ctxswout_thread(struct task_struct *task,
+ struct pfm_context *ctx, struct pfm_event_set *set);
+void pfm_arch_ctxswin_thread(struct task_struct *task,
+ struct pfm_context *ctx, struct pfm_event_set *set);
+void pfm_arch_stop(struct task_struct *task,
+ struct pfm_context *ctx, struct pfm_event_set *set);
+void pfm_arch_start(struct task_struct *task,
+ struct pfm_context *ctx, struct pfm_event_set *set);
+void pfm_arch_restore_pmds(struct pfm_context *ctx, struct pfm_event_set *set);
+void pfm_arch_restore_pmcs(struct pfm_context *ctx, struct pfm_event_set *set);
+void pfm_arch_intr_freeze_pmu(struct pfm_context *ctx);
+void pfm_arch_intr_unfreeze_pmu(struct pfm_context *ctx);
+int pfm_arch_pmu_config_check(struct pfm_pmu_config *cfg);
+void pfm_arch_pmu_config_init(void);
+int pfm_arch_initialize(void);
+char *pfm_arch_get_pmu_module_name(void);
+void pfm_arch_mask_monitoring(struct pfm_context *ctx);
+void pfm_arch_unmask_monitoring(struct pfm_context *ctx);
+void pfm_arch_unload_context(struct pfm_context *ctx,
+ struct task_struct *task);
+int pfm_arch_load_context(struct pfm_context *ctx,
+ struct task_struct *task);
+
+int pfm_arch_reserve_session(struct pfm_sessions *session,
+ struct pfm_context *ctx,
+ u32 cpu);
+
+void pfm_arch_release_session(struct pfm_sessions *session,
+ struct pfm_context *ctx,
+ u32 cpu);
+
+/*
+ * function called from pfm_setfl_sane(). Context is locked
+ * and interrupts are masked.
+ * The value of flags is the value of ctx_flags as passed by
+ * user.
+ *
+ * function must check arch-specific set flags.
+ * Return:
+ * 1 when flags are valid
+ * 0 on error
+ */
+static inline int pfm_arch_setfl_sane(struct pfm_context *ctx, u32 flags)
+{
+ return 0;
+}
+
+static inline void pfm_arch_show_session(struct seq_file *m)
+{}
+
+static inline int pfm_arch_context_initialize(struct pfm_context *ctx, u32 ctx_flags)
+{
+ return 0;
+}
+
+/*
+ * on all CPUs, the upper bits of a counter must be
+ * set in order for the overflow interrupt to happen. On overflow, the
+ * counter has wrapped around, and the upper bits are now cleared. This
+ * function set them back.
+ *
+ * The current version loses whatever is remaining in the counter,
+ * which is usually not zero but has a small count. In order not
+ * to loose this count, we do a read-modify-write to set the upper
+ * bits while preserving the low-order bits. This is slow but
+ * works.
+ */
+static inline void pfm_arch_ovfl_reset_pmd(struct pfm_context *ctx, unsigned int cnum)
+{
+ u64 val;
+ val = pfm_arch_read_pmd(ctx, cnum);
+ pfm_arch_write_pmd(ctx, cnum, val);
+}
+
+/*
+ * For Intel P4/Xeon/EM64T
+ */
+struct pfm_arch_context {
+ void *ds_area; /* pointer to DS management area */
+ u32 flags; /* arch-specific flags */
+};
+#define PFM_X86_FL_INSECURE 0x1 /* allow user level rdpmc (self-monitoring) */
+
+#define PFM_ARCH_CTX_SIZE (sizeof(struct pfm_arch_context))
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_I386_PERFMON_H_ */
--- linux-2.6.17.9.base/include/asm-i386/perfmon_p4_pebs_smpl.h 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17.9/include/asm-i386/perfmon_p4_pebs_smpl.h 2006-08-21 03:37:46.000000000 -0700
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2005-2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@....hp.com>
+ *
+ * This file implements the PEBS sampling format for 32-bit
+ * Intel Pentium 4/Xeon processors. Not to be used with Intel EM64T
+ * processors.
+ */
+#ifndef __PERFMON_P4_PEBS_SMPL_H__
+#define __PERFMON_P4_PEBS_SMPL_H__ 1
+
+#define PFM_P4_PEBS_SMPL_UUID { \
+ 0x0d, 0x85, 0x91, 0xe7, 0x49, 0x3f, 0x49, 0xae,\
+ 0x8c, 0xfc, 0xe8, 0xb9, 0x33, 0xe4, 0xeb, 0x8b}
+
+/*
+ * format specific parameters (passed at context creation)
+ *
+ * intr_thres: index from start of buffer of entry where the
+ * PMU interrupt must be triggered. It must be several samples
+ * short of the end of the buffer.
+ */
+struct pfm_p4_pebs_smpl_arg {
+ size_t buf_size; /* size of the buffer in bytes */
+ size_t intr_thres; /* index of interrupt threshold entry */
+ u32 flags; /* buffer specific flags */
+ u64 cnt_reset; /* counter reset value */
+ u32 res1; /* for future use */
+ u64 reserved[2]; /* for future use */
+};
+
+/*
+ * combined context+format specific structure. Can be passed
+ * to pfm_context_create()
+ */
+struct pfm_p4_pebs_smpl_ctx_arg {
+ struct pfarg_ctx ctx_arg;
+ struct pfm_p4_pebs_smpl_arg buf_arg;
+};
+
+/*
+ * DS save area as described in section 15.10.5
+ */
+struct pfm_p4_ds_area {
+ u32 bts_buf_base;
+ u32 bts_index;
+ u32 bts_abs_max;
+ u32 bts_intr_thres;
+ u32 pebs_buf_base;
+ u32 pebs_index;
+ u32 pebs_abs_max;
+ u32 pebs_intr_thres;
+ u64 pebs_cnt_reset;
+};
+
+/*
+ * This header is at the beginning of the sampling buffer returned to the user.
+ *
+ * Because of PEBS alignement constraints, the actual PEBS buffer area does
+ * not necessarily begin right after the header. The hdr_start_offs must be
+ * used to compute the first byte of the buffer. The offset is defined as
+ * the number of bytes between the end of the header and the beginning of
+ * the buffer. As such the formula is:
+ * actual_buffer = (unsigned long)(hdr+1)+hdr->hdr_start_offs
+ */
+struct pfm_p4_pebs_smpl_hdr {
+ u64 hdr_overflows; /* #overflows for buffer */
+ size_t hdr_buf_size; /* bytes in the buffer */
+ size_t hdr_start_offs; /* actual buffer start offset */
+ u32 hdr_version; /* smpl format version */
+ u64 hdr_res[3]; /* for future use */
+ struct pfm_p4_ds_area hdr_ds; /* DS management Area */
+};
+
+/*
+ * PEBS record format as described in section 15.10.6
+ */
+struct pfm_p4_pebs_smpl_entry{
+ u32 eflags;
+ u32 ip;
+ u32 eax;
+ u32 ebx;
+ u32 ecx;
+ u32 edx;
+ u32 esi;
+ u32 edi;
+ u32 ebp;
+ u32 esp;
+};
+
+#define PFM_P4_PEBS_SMPL_VERSION_MAJ 1U
+#define PFM_P4_PEBS_SMPL_VERSION_MIN 0U
+#define PFM_P4_PEBS_SMPL_VERSION (((PFM_P4_PEBS_SMPL_VERSION_MAJ&0xffff)<<16)|\
+ (PFM_P4_PEBS_SMPL_VERSION_MIN & 0xffff))
+
+#endif /* __PERFMON_P4_PEBS_SMPL_H__ */
-
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