[patch 01/19] perfmon2 minimal v2: generic headers
From: eranian
Date: Tue Jun 17 2008 - 18:02:49 EST
This patch adds the generic perfmon2 headers including the public
head perfmon.h which can be used by applications. The other
headers are for kernel use only.
Signed-off-by: Stephane Eranian <eranian@xxxxxxxxx>
--
Index: o/include/linux/perfmon.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ o/include/linux/perfmon.h 2008-06-17 08:50:15.000000000 +0200
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2001-2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA
+ */
+
+#ifndef __LINUX_PERFMON_H__
+#define __LINUX_PERFMON_H__
+
+/*
+ * This file contains all the user visible generic definitions for the
+ * interface. Model-specific user-visible definitions are located in
+ * the asm/perfmon.h file.
+ */
+
+/*
+ * include arch-specific user interface definitions
+ */
+#include <asm/perfmon.h>
+
+/*
+ * defined by each arch
+ */
+#define PFM_MAX_PMCS PFM_ARCH_MAX_PMCS
+#define PFM_MAX_PMDS PFM_ARCH_MAX_PMDS
+
+/*
+ * number of elements for each type of bitvector
+ * all bitvectors use u64 fixed size type on all architectures.
+ */
+#define PFM_BVSIZE(x) (((x)+(sizeof(__u64)<<3)-1) / (sizeof(__u64)<<3))
+#define PFM_PMD_BV PFM_BVSIZE(PFM_MAX_PMDS)
+#define PFM_PMC_BV PFM_BVSIZE(PFM_MAX_PMCS)
+
+/*
+ * default value for the user and group security parameters in
+ * /proc/sys/kernel/perfmon/sys_group
+ * /proc/sys/kernel/perfmon/task_group
+ */
+#define PFM_GROUP_PERM_ANY -1 /* any user/group */
+
+/*
+ * perfmon version number
+ */
+#define PFM_VERSION_MAJ 2U
+#define PFM_VERSION_MIN 99U
+#define PFM_VERSION (((PFM_VERSION_MAJ&0xffff)<<16)|\
+ (PFM_VERSION_MIN & 0xffff))
+#define PFM_VERSION_MAJOR(x) (((x)>>16) & 0xffff)
+#define PFM_VERSION_MINOR(x) ((x) & 0xffff)
+
+#endif /* __LINUX_PERFMON_H__ */
Index: o/include/linux/perfmon_kern.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ o/include/linux/perfmon_kern.h 2008-06-17 08:33:20.000000000 +0200
@@ -0,0 +1,253 @@
+/*
+ * Copyright (c) 2001-2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA
+ */
+
+#ifndef __LINUX_PERFMON_KERN_H__
+#define __LINUX_PERFMON_KERN_H__
+/*
+ * This file contains all the definitions of data structures, variables, macros
+ * that are to be shared between generic code and arch-specific code
+ *
+ * For generic only definitions, use perfmon/perfmon_priv.h
+ */
+#include <linux/file.h>
+#include <linux/sched.h>
+#include <linux/perfmon.h>
+
+#ifdef CONFIG_PERFMON
+
+/*
+ * system adminstrator configuration controls available via
+ * the /sys/kerne/perfmon interface
+ */
+struct pfm_controls {
+ u32 debug; /* debugging control bitmask */
+ gid_t task_group; /* gid to create a per-task context */
+ size_t arg_mem_max; /* maximum vector argument size */
+};
+extern struct pfm_controls pfm_controls;
+
+/*
+ * software PMD
+ */
+struct pfm_pmd {
+ u64 value; /* 64-bit value */
+ u64 lval; /* last reset value */
+};
+
+/*
+ * event_set: encapsulates the full PMU state
+ */
+struct pfm_event_set {
+ u16 nused_pmds; /* max number of used PMDs */
+ u16 nused_pmcs; /* max number of used PMCs */
+ u32 priv_flags; /* private flags (see below) */
+ u32 npend_ovfls; /* number of pending PMD overflow */
+ u32 pad2; /* padding */
+ u64 used_pmds[PFM_PMD_BV]; /* used PMDs */
+ u64 povfl_pmds[PFM_PMD_BV]; /* pending overflowed PMDs */
+ u64 used_pmcs[PFM_PMC_BV]; /* used PMCs */
+ u64 pmcs[PFM_MAX_PMCS]; /* PMC values */
+
+ struct pfm_pmd pmds[PFM_MAX_PMDS];
+};
+
+/*
+ * common private event set flags (priv_flags)
+ *
+ * upper 16 bits: for arch-specific use
+ * lower 16 bits: for common use
+ */
+#define PFM_SETFL_PRIV_MOD_PMDS 0x1 /* PMD register(s) modified */
+#define PFM_SETFL_PRIV_MOD_PMCS 0x2 /* PMC register(s) modified */
+#define PFM_SETFL_PRIV_MOD_BOTH (PFM_SETFL_PRIV_MOD_PMDS \
+ | PFM_SETFL_PRIV_MOD_PMCS)
+
+
+/*
+ * context flags
+ */
+struct pfm_context_flags {
+ unsigned int started:1; /* pfm_start() issued */
+ unsigned int is_self:1; /* per-thread and self-montoring */
+ unsigned int work_type:2; /* type of work for pfm_handle_work */
+ unsigned int reserved:28; /* for future use */
+};
+/*
+ * values for work_type (TIF_PERFMON_WORK must be set)
+ */
+#define PFM_WORK_NONE 0 /* nothing to do */
+#define PFM_WORK_ZOMBIE 1 /* cleanup zombie context */
+
+
+/*
+ * perfmon context state
+ */
+#define PFM_CTX_UNLOADED 1 /* context is detached */
+#define PFM_CTX_LOADED 2 /* context is attached */
+#define PFM_CTX_ZOMBIE 3 /* context lost owner but still attached */
+
+/*
+ * context: contains all the state of a session
+ */
+struct pfm_context {
+ spinlock_t lock; /* context protection */
+
+ struct pfm_context_flags flags;
+ u32 state; /* current state */
+ struct task_struct *task; /* attached task */
+
+ u64 last_act; /* last activation */
+ u32 last_cpu; /* last CPU used (SMP only) */
+
+ struct pfm_event_set *active_set; /* active set */
+ struct pfm_event_set _set0; /* event set 0 */
+};
+
+/*
+ * logging
+ */
+#define PFM_ERR(f, x...) printk(KERN_ERR "perfmon: " f "\n", ## x)
+#define PFM_WARN(f, x...) printk(KERN_WARNING "perfmon: " f "\n", ## x)
+#define PFM_LOG(f, x...) printk(KERN_NOTICE "perfmon: " f "\n", ## x)
+#define PFM_INFO(f, x...) printk(KERN_INFO "perfmon: " f "\n", ## x)
+
+/*
+ * debugging
+ *
+ * Printk rate limiting is enforced to avoid getting flooded with too many
+ * error messages on the console (which could render the machine unresponsive).
+ * To get full debug output (turn off ratelimit):
+ * $ echo 0 >/proc/sys/kernel/printk_ratelimit
+ *
+ * debug is a bitmask where bits are defined as follows:
+ * bit 0: enable non-interrupt code degbug messages
+ * bit 1: enable interrupt code debug messages
+ */
+#ifdef CONFIG_PERFMON_DEBUG
+#define _PFM_DBG(lm, f, x...) \
+ do { \
+ if (unlikely((pfm_controls.debug & lm) && printk_ratelimit())) { \
+ printk("perfmon: %s.%d: CPU%d [%d]: " f "\n", \
+ __func__, __LINE__, \
+ smp_processor_id(), current->pid , ## x); \
+ } \
+ } while (0)
+
+#define PFM_DBG(f, x...) _PFM_DBG(0x1, f, ##x)
+#define PFM_DBG_ovfl(f, x...) _PFM_DBG(0x2, f, ##x)
+#else
+#define PFM_DBG(f, x...) do {} while (0)
+#define PFM_DBG_ovfl(f, x...) do {} while (0)
+#endif
+
+extern struct pfm_pmu_config *pfm_pmu_conf;
+extern int perfmon_disabled;
+
+static inline struct pfm_arch_context *pfm_ctx_arch(struct pfm_context *c)
+{
+ return (struct pfm_arch_context *)(c+1);
+}
+
+#include <linux/perfmon_pmu.h>
+
+extern const struct file_operations pfm_file_ops;
+
+#define cast_ulp(_x) ((unsigned long *)_x)
+
+void pfm_handle_work(struct pt_regs *regs);
+void __pfm_exit_thread(void);
+void __pfm_init_percpu(void *dummy);
+
+static inline void pfm_exit_thread(void)
+{
+ if (current->pfm_context)
+ __pfm_exit_thread();
+}
+
+/*
+ * include arch-specific kernel level definitions
+ */
+#include <asm/perfmon_kern.h>
+
+static inline void pfm_copy_thread(struct task_struct *task)
+{
+ /*
+ * context or perfmon TIF state is NEVER inherited
+ * in child task. Holds for per-thread and system-wide
+ */
+ task->pfm_context = NULL;
+ clear_tsk_thread_flag(task, TIF_PERFMON_CTXSW);
+}
+
+/*
+ * read a single PMD register.
+ */
+static inline u64 pfm_read_pmd(struct pfm_context *ctx, unsigned int cnum)
+{
+ return pfm_arch_read_pmd(ctx, cnum);
+}
+/*
+ * write a single PMD register.
+ */
+static inline void pfm_write_pmd(struct pfm_context *ctx, unsigned int cnum,
+ u64 value)
+{
+ /*
+ * PMD writes are ignored for read-only registers
+ */
+ if (pfm_pmu_conf->pmd_desc[cnum].type & PFM_REG_RO)
+ return;
+
+ /*
+ * clear unimplemented bits
+ */
+ value &= ~pfm_pmu_conf->pmd_desc[cnum].rsvd_msk;
+
+ pfm_arch_write_pmd(ctx, cnum, value);
+}
+
+DECLARE_PER_CPU(struct pfm_context *, pmu_ctx);
+DECLARE_PER_CPU(struct task_struct *, pmu_owner);
+
+/*
+ * max vector argument elements for local storage (no kmalloc/kfree)
+ * The PFM_ARCH_PM*_ARG should be defined in perfmon_kern.h.
+ * If not, default (conservative) values are used
+ */
+#ifndef PFM_ARCH_PMC_STK_ARG
+#define PFM_ARCH_PMC_STK_ARG 1
+#endif
+
+#ifndef PFM_ARCH_PMD_STK_ARG
+#define PFM_ARCH_PMD_STK_ARG 1
+#endif
+
+#define PFM_PMC_STK_ARG PFM_ARCH_PMC_STK_ARG
+#define PFM_PMD_STK_ARG PFM_ARCH_PMD_STK_ARG
+
+#else /* !CONFIG_PERFMON */
+/*
+ * perfmon hooks are nops when CONFIG_PERFMON is undefined
+ */
+#define pfm_exit_thread(_t) do { } while (0)
+#define pfm_handle_work(_t) do { } while (0)
+#define pfm_copy_thread(_t) do { } while (0)
+
+#endif /* CONFIG_PERFMON */
+#endif /* __LINUX_PERFMON_KERN_H__ */
Index: o/include/linux/perfmon_pmu.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ o/include/linux/perfmon_pmu.h 2008-06-17 10:27:48.000000000 +0200
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2006 Hewlett-Packard Development Company, L.P.
+ * Contributed by Stephane Eranian <eranian@xxxxxxxxxx>
+ *
+ * Interface for PMU description modules
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA
+ */
+#ifndef __PERFMON_PMU_H__
+#define __PERFMON_PMU_H__ 1
+
+/*
+ * generic information about a PMC or PMD register
+ */
+struct pfm_regmap_desc {
+ u16 type; /* register infos */
+ u16 reserved1; /* for future use */
+ u32 reserved2; /* for future use */
+ u64 dfl_val; /* power-on default value (quiescent) */
+ u64 rsvd_msk; /* reserved bits: 1 means reserved */
+ u64 no_emul64_msk; /* bits to clear for PFM_REGFL_NO_EMUL64 */
+ unsigned long hw_addr; /* HW register address or index */
+ struct kobject kobj; /* for internal use only */
+ char *desc; /* HW register description string */
+};
+
+/*
+ * pfm_reg_desc helper macros
+ */
+#define PMC_D(t, d, v, r, n, h) \
+ { .type = t, \
+ .desc = d, \
+ .dfl_val = v, \
+ .rsvd_msk = r, \
+ .no_emul64_msk = n, \
+ .hw_addr = h \
+ }
+
+#define PMD_D(t, d, h) \
+ { .type = t, \
+ .desc = d, \
+ .rsvd_msk = 0, \
+ .no_emul64_msk = 0, \
+ .hw_addr = h \
+ }
+
+#define PMD_DR(t, d, h, r) \
+ { .type = t, \
+ .desc = d, \
+ .rsvd_msk = r, \
+ .no_emul64_msk = 0, \
+ .hw_addr = h \
+ }
+
+#define PMX_NA \
+ { .type = PFM_REG_NA }
+
+/*
+ * type of a PMU register (16-bit bitmask) for use with pfm_reg_desc.type
+ */
+#define PFM_REG_NA 0x00 /* not avail. (not impl.,no access) must be 0 */
+#define PFM_REG_I 0x01 /* PMC/PMD: implemented */
+#define PFM_REG_WC 0x02 /* PMC: has write_checker */
+#define PFM_REG_C64 0x04 /* PMD: 64-bit virtualization */
+#define PFM_REG_RO 0x08 /* PMD: read-only (writes ignored) */
+#define PFM_REG_INTR 0x20 /* PMD: register can generate interrupt */
+#define PFM_REG_NO64 0x100 /* PMC: supports PFM_REGFL_NO_EMUL64 */
+
+/*
+ * define some shortcuts for common types
+ */
+#define PFM_REG_W (PFM_REG_WC|PFM_REG_I)
+#define PFM_REG_W64 (PFM_REG_WC|PFM_REG_NO64|PFM_REG_I)
+#define PFM_REG_C (PFM_REG_C64|PFM_REG_INTR|PFM_REG_I)
+#define PFM_REG_I64 (PFM_REG_NO64|PFM_REG_I)
+#define PFM_REG_IRO (PFM_REG_I|PFM_REG_RO)
+
+typedef int (*pfm_pmc_check_t)(struct pfm_context *ctx,
+ struct pfm_event_set *set,
+ struct pfarg_pmc *req);
+
+typedef int (*pfm_pmd_check_t)(struct pfm_context *ctx,
+ struct pfm_event_set *set,
+ struct pfarg_pmd *req);
+
+/*
+ * registers description
+ */
+struct pfm_regdesc {
+ u64 pmcs[PFM_PMC_BV]; /* available PMC */
+ u64 pmds[PFM_PMD_BV]; /* available PMD */
+ u64 rw_pmds[PFM_PMD_BV]; /* available RW PMD */
+ u64 intr_pmds[PFM_PMD_BV]; /* PMD generating intr */
+ u64 cnt_pmds[PFM_PMD_BV]; /* PMD counters */
+ u16 max_pmc; /* highest+1 avail PMC */
+ u16 max_pmd; /* highest+1 avail PMD */
+ u16 max_rw_pmd; /* highest+1 avail RW PMD */
+ u16 max_intr_pmd; /* highest+1 intr PMD */
+ u16 num_rw_pmd; /* number of avail RW PMD */
+ u16 num_pmcs; /* number of logical PMCS */
+ u16 num_pmds; /* number of logical PMDS */
+ u16 num_counters; /* number of counting PMD */
+};
+
+/*
+ * structure used by pmu description modules
+ *
+ * probe_pmu() routine return value:
+ * - 1 means recognized PMU
+ * - 0 means not recognized PMU
+ */
+struct pfm_pmu_config {
+ char *pmu_name; /* PMU family name */
+ char *version; /* config module version */
+
+ int counter_width; /* width of hardware counter */
+
+ struct pfm_regmap_desc *pmc_desc; /* PMC register descriptions */
+ struct pfm_regmap_desc *pmd_desc; /* PMD register descriptions */
+
+ pfm_pmc_check_t pmc_write_check;/* write checker (optional) */
+ pfm_pmd_check_t pmd_write_check;/* write checker (optional) */
+ pfm_pmd_check_t pmd_read_check; /* read checker (optional) */
+ u16 num_pmc_entries;/* #entries in pmc_desc */
+ u16 num_pmd_entries;/* #entries in pmd_desc */
+ void *pmu_info; /* model-specific infos */
+ /*
+ * fields computed internally, do not set in module
+ */
+ struct pfm_regdesc regs; /* registers available */
+ u64 ovfl_mask; /* overflow mask */
+};
+
+static inline void *pfm_pmu_info(void)
+{
+ return pfm_pmu_conf->pmu_info;
+}
+
+int pfm_pmu_register(struct pfm_pmu_config *cfg);
+
+int pfm_sysfs_add_pmu(struct pfm_pmu_config *pmu);
+
+#endif /* __PERFMON_PMU_H__ */
--
--
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