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linuxdebug/arch/x86/events/intel/p4.c

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null pointer error
2024-07-16 15:50:57 +02:00
/*
* Netburst Performance Events (P4, old Xeon)
*
* Copyright (C) 2010 Parallels, Inc., Cyrill Gorcunov <gorcunov@openvz.org>
* Copyright (C) 2010 Intel Corporation, Lin Ming <ming.m.lin@intel.com>
*
* For licencing details see kernel-base/COPYING
*/
#include <linux/perf_event.h>
#include <asm/perf_event_p4.h>
#include <asm/hardirq.h>
#include <asm/apic.h>
#include "../perf_event.h"
#define P4_CNTR_LIMIT 3
/*
* array indices: 0,1 - HT threads, used with HT enabled cpu
*/
struct p4_event_bind {
unsigned int opcode; /* Event code and ESCR selector */
unsigned int escr_msr[2]; /* ESCR MSR for this event */
unsigned int escr_emask; /* valid ESCR EventMask bits */
unsigned int shared; /* event is shared across threads */
char cntr[2][P4_CNTR_LIMIT]; /* counter index (offset), -1 on absence */
};
struct p4_pebs_bind {
unsigned int metric_pebs;
unsigned int metric_vert;
};
/* it sets P4_PEBS_ENABLE_UOP_TAG as well */
#define P4_GEN_PEBS_BIND(name, pebs, vert) \
[P4_PEBS_METRIC__##name] = { \
.metric_pebs = pebs | P4_PEBS_ENABLE_UOP_TAG, \
.metric_vert = vert, \
}
/*
* note we have P4_PEBS_ENABLE_UOP_TAG always set here
*
* it's needed for mapping P4_PEBS_CONFIG_METRIC_MASK bits of
* event configuration to find out which values are to be
* written into MSR_IA32_PEBS_ENABLE and MSR_P4_PEBS_MATRIX_VERT
* registers
*/
static struct p4_pebs_bind p4_pebs_bind_map[] = {
P4_GEN_PEBS_BIND(1stl_cache_load_miss_retired, 0x0000001, 0x0000001),
P4_GEN_PEBS_BIND(2ndl_cache_load_miss_retired, 0x0000002, 0x0000001),
P4_GEN_PEBS_BIND(dtlb_load_miss_retired, 0x0000004, 0x0000001),
P4_GEN_PEBS_BIND(dtlb_store_miss_retired, 0x0000004, 0x0000002),
P4_GEN_PEBS_BIND(dtlb_all_miss_retired, 0x0000004, 0x0000003),
P4_GEN_PEBS_BIND(tagged_mispred_branch, 0x0018000, 0x0000010),
P4_GEN_PEBS_BIND(mob_load_replay_retired, 0x0000200, 0x0000001),
P4_GEN_PEBS_BIND(split_load_retired, 0x0000400, 0x0000001),
P4_GEN_PEBS_BIND(split_store_retired, 0x0000400, 0x0000002),
};
/*
* Note that we don't use CCCR1 here, there is an
* exception for P4_BSQ_ALLOCATION but we just have
* no workaround
*
* consider this binding as resources which particular
* event may borrow, it doesn't contain EventMask,
* Tags and friends -- they are left to a caller
*/
static struct p4_event_bind p4_event_bind_map[] = {
[P4_EVENT_TC_DELIVER_MODE] = {
.opcode = P4_OPCODE(P4_EVENT_TC_DELIVER_MODE),
.escr_msr = { MSR_P4_TC_ESCR0, MSR_P4_TC_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_TC_DELIVER_MODE, DD) |
P4_ESCR_EMASK_BIT(P4_EVENT_TC_DELIVER_MODE, DB) |
P4_ESCR_EMASK_BIT(P4_EVENT_TC_DELIVER_MODE, DI) |
P4_ESCR_EMASK_BIT(P4_EVENT_TC_DELIVER_MODE, BD) |
P4_ESCR_EMASK_BIT(P4_EVENT_TC_DELIVER_MODE, BB) |
P4_ESCR_EMASK_BIT(P4_EVENT_TC_DELIVER_MODE, BI) |
P4_ESCR_EMASK_BIT(P4_EVENT_TC_DELIVER_MODE, ID),
.shared = 1,
.cntr = { {4, 5, -1}, {6, 7, -1} },
},
[P4_EVENT_BPU_FETCH_REQUEST] = {
.opcode = P4_OPCODE(P4_EVENT_BPU_FETCH_REQUEST),
.escr_msr = { MSR_P4_BPU_ESCR0, MSR_P4_BPU_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_BPU_FETCH_REQUEST, TCMISS),
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_ITLB_REFERENCE] = {
.opcode = P4_OPCODE(P4_EVENT_ITLB_REFERENCE),
.escr_msr = { MSR_P4_ITLB_ESCR0, MSR_P4_ITLB_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_ITLB_REFERENCE, HIT) |
P4_ESCR_EMASK_BIT(P4_EVENT_ITLB_REFERENCE, MISS) |
P4_ESCR_EMASK_BIT(P4_EVENT_ITLB_REFERENCE, HIT_UK),
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_MEMORY_CANCEL] = {
.opcode = P4_OPCODE(P4_EVENT_MEMORY_CANCEL),
.escr_msr = { MSR_P4_DAC_ESCR0, MSR_P4_DAC_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_MEMORY_CANCEL, ST_RB_FULL) |
P4_ESCR_EMASK_BIT(P4_EVENT_MEMORY_CANCEL, 64K_CONF),
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_MEMORY_COMPLETE] = {
.opcode = P4_OPCODE(P4_EVENT_MEMORY_COMPLETE),
.escr_msr = { MSR_P4_SAAT_ESCR0 , MSR_P4_SAAT_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_MEMORY_COMPLETE, LSC) |
P4_ESCR_EMASK_BIT(P4_EVENT_MEMORY_COMPLETE, SSC),
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_LOAD_PORT_REPLAY] = {
.opcode = P4_OPCODE(P4_EVENT_LOAD_PORT_REPLAY),
.escr_msr = { MSR_P4_SAAT_ESCR0, MSR_P4_SAAT_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_LOAD_PORT_REPLAY, SPLIT_LD),
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_STORE_PORT_REPLAY] = {
.opcode = P4_OPCODE(P4_EVENT_STORE_PORT_REPLAY),
.escr_msr = { MSR_P4_SAAT_ESCR0 , MSR_P4_SAAT_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_STORE_PORT_REPLAY, SPLIT_ST),
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_MOB_LOAD_REPLAY] = {
.opcode = P4_OPCODE(P4_EVENT_MOB_LOAD_REPLAY),
.escr_msr = { MSR_P4_MOB_ESCR0, MSR_P4_MOB_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_MOB_LOAD_REPLAY, NO_STA) |
P4_ESCR_EMASK_BIT(P4_EVENT_MOB_LOAD_REPLAY, NO_STD) |
P4_ESCR_EMASK_BIT(P4_EVENT_MOB_LOAD_REPLAY, PARTIAL_DATA) |
P4_ESCR_EMASK_BIT(P4_EVENT_MOB_LOAD_REPLAY, UNALGN_ADDR),
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_PAGE_WALK_TYPE] = {
.opcode = P4_OPCODE(P4_EVENT_PAGE_WALK_TYPE),
.escr_msr = { MSR_P4_PMH_ESCR0, MSR_P4_PMH_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_PAGE_WALK_TYPE, DTMISS) |
P4_ESCR_EMASK_BIT(P4_EVENT_PAGE_WALK_TYPE, ITMISS),
.shared = 1,
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_BSQ_CACHE_REFERENCE] = {
.opcode = P4_OPCODE(P4_EVENT_BSQ_CACHE_REFERENCE),
.escr_msr = { MSR_P4_BSU_ESCR0, MSR_P4_BSU_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITS) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITM) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITS) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITM) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_MISS) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_MISS) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, WR_2ndL_MISS),
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_IOQ_ALLOCATION] = {
.opcode = P4_OPCODE(P4_EVENT_IOQ_ALLOCATION),
.escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, DEFAULT) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, ALL_READ) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, ALL_WRITE) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, MEM_UC) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, MEM_WC) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, MEM_WT) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, MEM_WP) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, MEM_WB) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, OWN) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, OTHER) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ALLOCATION, PREFETCH),
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_IOQ_ACTIVE_ENTRIES] = { /* shared ESCR */
.opcode = P4_OPCODE(P4_EVENT_IOQ_ACTIVE_ENTRIES),
.escr_msr = { MSR_P4_FSB_ESCR1, MSR_P4_FSB_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, DEFAULT) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, ALL_READ) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, ALL_WRITE) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_UC) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_WC) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_WT) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_WP) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_WB) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, OWN) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, OTHER) |
P4_ESCR_EMASK_BIT(P4_EVENT_IOQ_ACTIVE_ENTRIES, PREFETCH),
.cntr = { {2, -1, -1}, {3, -1, -1} },
},
[P4_EVENT_FSB_DATA_ACTIVITY] = {
.opcode = P4_OPCODE(P4_EVENT_FSB_DATA_ACTIVITY),
.escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_DRV) |
P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_OWN) |
P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_OTHER) |
P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DBSY_DRV) |
P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DBSY_OWN) |
P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DBSY_OTHER),
.shared = 1,
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_BSQ_ALLOCATION] = { /* shared ESCR, broken CCCR1 */
.opcode = P4_OPCODE(P4_EVENT_BSQ_ALLOCATION),
.escr_msr = { MSR_P4_BSU_ESCR0, MSR_P4_BSU_ESCR0 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_TYPE0) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_TYPE1) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_LEN0) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_LEN1) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_IO_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_LOCK_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_CACHE_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_SPLIT_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_DEM_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, REQ_ORD_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, MEM_TYPE0) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, MEM_TYPE1) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ALLOCATION, MEM_TYPE2),
.cntr = { {0, -1, -1}, {1, -1, -1} },
},
[P4_EVENT_BSQ_ACTIVE_ENTRIES] = { /* shared ESCR */
.opcode = P4_OPCODE(P4_EVENT_BSQ_ACTIVE_ENTRIES),
.escr_msr = { MSR_P4_BSU_ESCR1 , MSR_P4_BSU_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_TYPE0) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_TYPE1) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_LEN0) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_LEN1) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_IO_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_LOCK_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_CACHE_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_SPLIT_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_DEM_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_ORD_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, MEM_TYPE0) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, MEM_TYPE1) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_ACTIVE_ENTRIES, MEM_TYPE2),
.cntr = { {2, -1, -1}, {3, -1, -1} },
},
[P4_EVENT_SSE_INPUT_ASSIST] = {
.opcode = P4_OPCODE(P4_EVENT_SSE_INPUT_ASSIST),
.escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_SSE_INPUT_ASSIST, ALL),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_PACKED_SP_UOP] = {
.opcode = P4_OPCODE(P4_EVENT_PACKED_SP_UOP),
.escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_PACKED_SP_UOP, ALL),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_PACKED_DP_UOP] = {
.opcode = P4_OPCODE(P4_EVENT_PACKED_DP_UOP),
.escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_PACKED_DP_UOP, ALL),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_SCALAR_SP_UOP] = {
.opcode = P4_OPCODE(P4_EVENT_SCALAR_SP_UOP),
.escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_SCALAR_SP_UOP, ALL),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_SCALAR_DP_UOP] = {
.opcode = P4_OPCODE(P4_EVENT_SCALAR_DP_UOP),
.escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_SCALAR_DP_UOP, ALL),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_64BIT_MMX_UOP] = {
.opcode = P4_OPCODE(P4_EVENT_64BIT_MMX_UOP),
.escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_64BIT_MMX_UOP, ALL),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_128BIT_MMX_UOP] = {
.opcode = P4_OPCODE(P4_EVENT_128BIT_MMX_UOP),
.escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_128BIT_MMX_UOP, ALL),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_X87_FP_UOP] = {
.opcode = P4_OPCODE(P4_EVENT_X87_FP_UOP),
.escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_X87_FP_UOP, ALL),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_TC_MISC] = {
.opcode = P4_OPCODE(P4_EVENT_TC_MISC),
.escr_msr = { MSR_P4_TC_ESCR0, MSR_P4_TC_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_TC_MISC, FLUSH),
.cntr = { {4, 5, -1}, {6, 7, -1} },
},
[P4_EVENT_GLOBAL_POWER_EVENTS] = {
.opcode = P4_OPCODE(P4_EVENT_GLOBAL_POWER_EVENTS),
.escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_GLOBAL_POWER_EVENTS, RUNNING),
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_TC_MS_XFER] = {
.opcode = P4_OPCODE(P4_EVENT_TC_MS_XFER),
.escr_msr = { MSR_P4_MS_ESCR0, MSR_P4_MS_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_TC_MS_XFER, CISC),
.cntr = { {4, 5, -1}, {6, 7, -1} },
},
[P4_EVENT_UOP_QUEUE_WRITES] = {
.opcode = P4_OPCODE(P4_EVENT_UOP_QUEUE_WRITES),
.escr_msr = { MSR_P4_MS_ESCR0, MSR_P4_MS_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_UOP_QUEUE_WRITES, FROM_TC_BUILD) |
P4_ESCR_EMASK_BIT(P4_EVENT_UOP_QUEUE_WRITES, FROM_TC_DELIVER) |
P4_ESCR_EMASK_BIT(P4_EVENT_UOP_QUEUE_WRITES, FROM_ROM),
.cntr = { {4, 5, -1}, {6, 7, -1} },
},
[P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE] = {
.opcode = P4_OPCODE(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE),
.escr_msr = { MSR_P4_TBPU_ESCR0 , MSR_P4_TBPU_ESCR0 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE, CONDITIONAL) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE, CALL) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE, RETURN) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE, INDIRECT),
.cntr = { {4, 5, -1}, {6, 7, -1} },
},
[P4_EVENT_RETIRED_BRANCH_TYPE] = {
.opcode = P4_OPCODE(P4_EVENT_RETIRED_BRANCH_TYPE),
.escr_msr = { MSR_P4_TBPU_ESCR0 , MSR_P4_TBPU_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, CONDITIONAL) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, CALL) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, RETURN) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, INDIRECT),
.cntr = { {4, 5, -1}, {6, 7, -1} },
},
[P4_EVENT_RESOURCE_STALL] = {
.opcode = P4_OPCODE(P4_EVENT_RESOURCE_STALL),
.escr_msr = { MSR_P4_ALF_ESCR0, MSR_P4_ALF_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_RESOURCE_STALL, SBFULL),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_WC_BUFFER] = {
.opcode = P4_OPCODE(P4_EVENT_WC_BUFFER),
.escr_msr = { MSR_P4_DAC_ESCR0, MSR_P4_DAC_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_WC_BUFFER, WCB_EVICTS) |
P4_ESCR_EMASK_BIT(P4_EVENT_WC_BUFFER, WCB_FULL_EVICTS),
.shared = 1,
.cntr = { {8, 9, -1}, {10, 11, -1} },
},
[P4_EVENT_B2B_CYCLES] = {
.opcode = P4_OPCODE(P4_EVENT_B2B_CYCLES),
.escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
.escr_emask = 0,
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_BNR] = {
.opcode = P4_OPCODE(P4_EVENT_BNR),
.escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
.escr_emask = 0,
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_SNOOP] = {
.opcode = P4_OPCODE(P4_EVENT_SNOOP),
.escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
.escr_emask = 0,
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_RESPONSE] = {
.opcode = P4_OPCODE(P4_EVENT_RESPONSE),
.escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
.escr_emask = 0,
.cntr = { {0, -1, -1}, {2, -1, -1} },
},
[P4_EVENT_FRONT_END_EVENT] = {
.opcode = P4_OPCODE(P4_EVENT_FRONT_END_EVENT),
.escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_FRONT_END_EVENT, NBOGUS) |
P4_ESCR_EMASK_BIT(P4_EVENT_FRONT_END_EVENT, BOGUS),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_EXECUTION_EVENT] = {
.opcode = P4_OPCODE(P4_EVENT_EXECUTION_EVENT),
.escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, NBOGUS0) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, NBOGUS1) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, NBOGUS2) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, NBOGUS3) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, BOGUS0) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, BOGUS1) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, BOGUS2) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, BOGUS3),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_REPLAY_EVENT] = {
.opcode = P4_OPCODE(P4_EVENT_REPLAY_EVENT),
.escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_REPLAY_EVENT, NBOGUS) |
P4_ESCR_EMASK_BIT(P4_EVENT_REPLAY_EVENT, BOGUS),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_INSTR_RETIRED] = {
.opcode = P4_OPCODE(P4_EVENT_INSTR_RETIRED),
.escr_msr = { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, NBOGUSNTAG) |
P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, NBOGUSTAG) |
P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, BOGUSNTAG) |
P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, BOGUSTAG),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_UOPS_RETIRED] = {
.opcode = P4_OPCODE(P4_EVENT_UOPS_RETIRED),
.escr_msr = { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_UOPS_RETIRED, NBOGUS) |
P4_ESCR_EMASK_BIT(P4_EVENT_UOPS_RETIRED, BOGUS),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_UOP_TYPE] = {
.opcode = P4_OPCODE(P4_EVENT_UOP_TYPE),
.escr_msr = { MSR_P4_RAT_ESCR0, MSR_P4_RAT_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_UOP_TYPE, TAGLOADS) |
P4_ESCR_EMASK_BIT(P4_EVENT_UOP_TYPE, TAGSTORES),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_BRANCH_RETIRED] = {
.opcode = P4_OPCODE(P4_EVENT_BRANCH_RETIRED),
.escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_BRANCH_RETIRED, MMNP) |
P4_ESCR_EMASK_BIT(P4_EVENT_BRANCH_RETIRED, MMNM) |
P4_ESCR_EMASK_BIT(P4_EVENT_BRANCH_RETIRED, MMTP) |
P4_ESCR_EMASK_BIT(P4_EVENT_BRANCH_RETIRED, MMTM),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_MISPRED_BRANCH_RETIRED] = {
.opcode = P4_OPCODE(P4_EVENT_MISPRED_BRANCH_RETIRED),
.escr_msr = { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_MISPRED_BRANCH_RETIRED, NBOGUS),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_X87_ASSIST] = {
.opcode = P4_OPCODE(P4_EVENT_X87_ASSIST),
.escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_X87_ASSIST, FPSU) |
P4_ESCR_EMASK_BIT(P4_EVENT_X87_ASSIST, FPSO) |
P4_ESCR_EMASK_BIT(P4_EVENT_X87_ASSIST, POAO) |
P4_ESCR_EMASK_BIT(P4_EVENT_X87_ASSIST, POAU) |
P4_ESCR_EMASK_BIT(P4_EVENT_X87_ASSIST, PREA),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_MACHINE_CLEAR] = {
.opcode = P4_OPCODE(P4_EVENT_MACHINE_CLEAR),
.escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_MACHINE_CLEAR, CLEAR) |
P4_ESCR_EMASK_BIT(P4_EVENT_MACHINE_CLEAR, MOCLEAR) |
P4_ESCR_EMASK_BIT(P4_EVENT_MACHINE_CLEAR, SMCLEAR),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
[P4_EVENT_INSTR_COMPLETED] = {
.opcode = P4_OPCODE(P4_EVENT_INSTR_COMPLETED),
.escr_msr = { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
.escr_emask =
P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_COMPLETED, NBOGUS) |
P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_COMPLETED, BOGUS),
.cntr = { {12, 13, 16}, {14, 15, 17} },
},
};
#define P4_GEN_CACHE_EVENT(event, bit, metric) \
p4_config_pack_escr(P4_ESCR_EVENT(event) | \
P4_ESCR_EMASK_BIT(event, bit)) | \
p4_config_pack_cccr(metric | \
P4_CCCR_ESEL(P4_OPCODE_ESEL(P4_OPCODE(event))))
static __initconst const u64 p4_hw_cache_event_ids
[PERF_COUNT_HW_CACHE_MAX]
[PERF_COUNT_HW_CACHE_OP_MAX]
[PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
[ C(L1D ) ] = {
[ C(OP_READ) ] = {
[ C(RESULT_ACCESS) ] = 0x0,
[ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
P4_PEBS_METRIC__1stl_cache_load_miss_retired),
},
},
[ C(LL ) ] = {
[ C(OP_READ) ] = {
[ C(RESULT_ACCESS) ] = 0x0,
[ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
P4_PEBS_METRIC__2ndl_cache_load_miss_retired),
},
},
[ C(DTLB) ] = {
[ C(OP_READ) ] = {
[ C(RESULT_ACCESS) ] = 0x0,
[ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
P4_PEBS_METRIC__dtlb_load_miss_retired),
},
[ C(OP_WRITE) ] = {
[ C(RESULT_ACCESS) ] = 0x0,
[ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
P4_PEBS_METRIC__dtlb_store_miss_retired),
},
},
[ C(ITLB) ] = {
[ C(OP_READ) ] = {
[ C(RESULT_ACCESS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_ITLB_REFERENCE, HIT,
P4_PEBS_METRIC__none),
[ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_ITLB_REFERENCE, MISS,
P4_PEBS_METRIC__none),
},
[ C(OP_WRITE) ] = {
[ C(RESULT_ACCESS) ] = -1,
[ C(RESULT_MISS) ] = -1,
},
[ C(OP_PREFETCH) ] = {
[ C(RESULT_ACCESS) ] = -1,
[ C(RESULT_MISS) ] = -1,
},
},
[ C(NODE) ] = {
[ C(OP_READ) ] = {
[ C(RESULT_ACCESS) ] = -1,
[ C(RESULT_MISS) ] = -1,
},
[ C(OP_WRITE) ] = {
[ C(RESULT_ACCESS) ] = -1,
[ C(RESULT_MISS) ] = -1,
},
[ C(OP_PREFETCH) ] = {
[ C(RESULT_ACCESS) ] = -1,
[ C(RESULT_MISS) ] = -1,
},
},
};
/*
* Because of Netburst being quite restricted in how many
* identical events may run simultaneously, we introduce event aliases,
* ie the different events which have the same functionality but
* utilize non-intersected resources (ESCR/CCCR/counter registers).
*
* This allow us to relax restrictions a bit and run two or more
* identical events together.
*
* Never set any custom internal bits such as P4_CONFIG_HT,
* P4_CONFIG_ALIASABLE or bits for P4_PEBS_METRIC, they are
* either up to date automatically or not applicable at all.
*/
static struct p4_event_alias {
u64 original;
u64 alternative;
} p4_event_aliases[] = {
{
/*
* Non-halted cycles can be substituted with non-sleeping cycles (see
* Intel SDM Vol3b for details). We need this alias to be able
* to run nmi-watchdog and 'perf top' (or any other user space tool
* which is interested in running PERF_COUNT_HW_CPU_CYCLES)
* simultaneously.
*/
.original =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_GLOBAL_POWER_EVENTS) |
P4_ESCR_EMASK_BIT(P4_EVENT_GLOBAL_POWER_EVENTS, RUNNING)),
.alternative =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_EXECUTION_EVENT) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, NBOGUS0)|
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, NBOGUS1)|
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, NBOGUS2)|
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, NBOGUS3)|
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, BOGUS0) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, BOGUS1) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, BOGUS2) |
P4_ESCR_EMASK_BIT(P4_EVENT_EXECUTION_EVENT, BOGUS3))|
p4_config_pack_cccr(P4_CCCR_THRESHOLD(15) | P4_CCCR_COMPLEMENT |
P4_CCCR_COMPARE),
},
};
static u64 p4_get_alias_event(u64 config)
{
u64 config_match;
int i;
/*
* Only event with special mark is allowed,
* we're to be sure it didn't come as malformed
* RAW event.
*/
if (!(config & P4_CONFIG_ALIASABLE))
return 0;
config_match = config & P4_CONFIG_EVENT_ALIAS_MASK;
for (i = 0; i < ARRAY_SIZE(p4_event_aliases); i++) {
if (config_match == p4_event_aliases[i].original) {
config_match = p4_event_aliases[i].alternative;
break;
} else if (config_match == p4_event_aliases[i].alternative) {
config_match = p4_event_aliases[i].original;
break;
}
}
if (i >= ARRAY_SIZE(p4_event_aliases))
return 0;
return config_match | (config & P4_CONFIG_EVENT_ALIAS_IMMUTABLE_BITS);
}
static u64 p4_general_events[PERF_COUNT_HW_MAX] = {
/* non-halted CPU clocks */
[PERF_COUNT_HW_CPU_CYCLES] =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_GLOBAL_POWER_EVENTS) |
P4_ESCR_EMASK_BIT(P4_EVENT_GLOBAL_POWER_EVENTS, RUNNING)) |
P4_CONFIG_ALIASABLE,
/*
* retired instructions
* in a sake of simplicity we don't use the FSB tagging
*/
[PERF_COUNT_HW_INSTRUCTIONS] =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_INSTR_RETIRED) |
P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, NBOGUSNTAG) |
P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, BOGUSNTAG)),
/* cache hits */
[PERF_COUNT_HW_CACHE_REFERENCES] =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_BSQ_CACHE_REFERENCE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITS) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITM) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITS) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITM)),
/* cache misses */
[PERF_COUNT_HW_CACHE_MISSES] =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_BSQ_CACHE_REFERENCE) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_MISS) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_MISS) |
P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, WR_2ndL_MISS)),
/* branch instructions retired */
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_RETIRED_BRANCH_TYPE) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, CONDITIONAL) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, CALL) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, RETURN) |
P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, INDIRECT)),
/* mispredicted branches retired */
[PERF_COUNT_HW_BRANCH_MISSES] =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_MISPRED_BRANCH_RETIRED) |
P4_ESCR_EMASK_BIT(P4_EVENT_MISPRED_BRANCH_RETIRED, NBOGUS)),
/* bus ready clocks (cpu is driving #DRDY_DRV\#DRDY_OWN): */
[PERF_COUNT_HW_BUS_CYCLES] =
p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_FSB_DATA_ACTIVITY) |
P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_DRV) |
P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_OWN)) |
p4_config_pack_cccr(P4_CCCR_EDGE | P4_CCCR_COMPARE),
};
static struct p4_event_bind *p4_config_get_bind(u64 config)
{
unsigned int evnt = p4_config_unpack_event(config);
struct p4_event_bind *bind = NULL;
if (evnt < ARRAY_SIZE(p4_event_bind_map))
bind = &p4_event_bind_map[evnt];
return bind;
}
static u64 p4_pmu_event_map(int hw_event)
{
struct p4_event_bind *bind;
unsigned int esel;
u64 config;
config = p4_general_events[hw_event];
bind = p4_config_get_bind(config);
esel = P4_OPCODE_ESEL(bind->opcode);
config |= p4_config_pack_cccr(P4_CCCR_ESEL(esel));
return config;
}
/* check cpu model specifics */
static bool p4_event_match_cpu_model(unsigned int event_idx)
{
/* INSTR_COMPLETED event only exist for model 3, 4, 6 (Prescott) */
if (event_idx == P4_EVENT_INSTR_COMPLETED) {
if (boot_cpu_data.x86_model != 3 &&
boot_cpu_data.x86_model != 4 &&
boot_cpu_data.x86_model != 6)
return false;
}
/*
* For info
* - IQ_ESCR0, IQ_ESCR1 only for models 1 and 2
*/
return true;
}
static int p4_validate_raw_event(struct perf_event *event)
{
unsigned int v, emask;
/* User data may have out-of-bound event index */
v = p4_config_unpack_event(event->attr.config);
if (v >= ARRAY_SIZE(p4_event_bind_map))
return -EINVAL;
/* It may be unsupported: */
if (!p4_event_match_cpu_model(v))
return -EINVAL;
/*
* NOTE: P4_CCCR_THREAD_ANY has not the same meaning as
* in Architectural Performance Monitoring, it means not
* on _which_ logical cpu to count but rather _when_, ie it
* depends on logical cpu state -- count event if one cpu active,
* none, both or any, so we just allow user to pass any value
* desired.
*
* In turn we always set Tx_OS/Tx_USR bits bound to logical
* cpu without their propagation to another cpu
*/
/*
* if an event is shared across the logical threads
* the user needs special permissions to be able to use it
*/
if (p4_ht_active() && p4_event_bind_map[v].shared) {
v = perf_allow_cpu(&event->attr);
if (v)
return v;
}
/* ESCR EventMask bits may be invalid */
emask = p4_config_unpack_escr(event->attr.config) & P4_ESCR_EVENTMASK_MASK;
if (emask & ~p4_event_bind_map[v].escr_emask)
return -EINVAL;
/*
* it may have some invalid PEBS bits
*/
if (p4_config_pebs_has(event->attr.config, P4_PEBS_CONFIG_ENABLE))
return -EINVAL;
v = p4_config_unpack_metric(event->attr.config);
if (v >= ARRAY_SIZE(p4_pebs_bind_map))
return -EINVAL;
return 0;
}
static int p4_hw_config(struct perf_event *event)
{
int cpu = get_cpu();
int rc = 0;
u32 escr, cccr;
/*
* the reason we use cpu that early is that: if we get scheduled
* first time on the same cpu -- we will not need swap thread
* specific flags in config (and will save some cpu cycles)
*/
cccr = p4_default_cccr_conf(cpu);
escr = p4_default_escr_conf(cpu, event->attr.exclude_kernel,
event->attr.exclude_user);
event->hw.config = p4_config_pack_escr(escr) |
p4_config_pack_cccr(cccr);
if (p4_ht_active() && p4_ht_thread(cpu))
event->hw.config = p4_set_ht_bit(event->hw.config);
if (event->attr.type == PERF_TYPE_RAW) {
struct p4_event_bind *bind;
unsigned int esel;
/*
* Clear bits we reserve to be managed by kernel itself
* and never allowed from a user space
*/
event->attr.config &= P4_CONFIG_MASK;
rc = p4_validate_raw_event(event);
if (rc)
goto out;
/*
* Note that for RAW events we allow user to use P4_CCCR_RESERVED
* bits since we keep additional info here (for cache events and etc)
*/
event->hw.config |= event->attr.config;
bind = p4_config_get_bind(event->attr.config);
if (!bind) {
rc = -EINVAL;
goto out;
}
esel = P4_OPCODE_ESEL(bind->opcode);
event->hw.config |= p4_config_pack_cccr(P4_CCCR_ESEL(esel));
}
rc = x86_setup_perfctr(event);
out:
put_cpu();
return rc;
}
static inline int p4_pmu_clear_cccr_ovf(struct hw_perf_event *hwc)
{
u64 v;
/* an official way for overflow indication */
rdmsrl(hwc->config_base, v);
if (v & P4_CCCR_OVF) {
wrmsrl(hwc->config_base, v & ~P4_CCCR_OVF);
return 1;
}
/*
* In some circumstances the overflow might issue an NMI but did
* not set P4_CCCR_OVF bit. Because a counter holds a negative value
* we simply check for high bit being set, if it's cleared it means
* the counter has reached zero value and continued counting before
* real NMI signal was received:
*/
rdmsrl(hwc->event_base, v);
if (!(v & ARCH_P4_UNFLAGGED_BIT))
return 1;
return 0;
}
static void p4_pmu_disable_pebs(void)
{
/*
* FIXME
*
* It's still allowed that two threads setup same cache
* events so we can't simply clear metrics until we knew
* no one is depending on us, so we need kind of counter
* for "ReplayEvent" users.
*
* What is more complex -- RAW events, if user (for some
* reason) will pass some cache event metric with improper
* event opcode -- it's fine from hardware point of view
* but completely nonsense from "meaning" of such action.
*
* So at moment let leave metrics turned on forever -- it's
* ok for now but need to be revisited!
*
* (void)wrmsrl_safe(MSR_IA32_PEBS_ENABLE, 0);
* (void)wrmsrl_safe(MSR_P4_PEBS_MATRIX_VERT, 0);
*/
}
static inline void p4_pmu_disable_event(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
/*
* If event gets disabled while counter is in overflowed
* state we need to clear P4_CCCR_OVF, otherwise interrupt get
* asserted again and again
*/
(void)wrmsrl_safe(hwc->config_base,
p4_config_unpack_cccr(hwc->config) & ~P4_CCCR_ENABLE & ~P4_CCCR_OVF & ~P4_CCCR_RESERVED);
}
static void p4_pmu_disable_all(void)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
int idx;
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
struct perf_event *event = cpuc->events[idx];
if (!test_bit(idx, cpuc->active_mask))
continue;
p4_pmu_disable_event(event);
}
p4_pmu_disable_pebs();
}
/* configuration must be valid */
static void p4_pmu_enable_pebs(u64 config)
{
struct p4_pebs_bind *bind;
unsigned int idx;
BUILD_BUG_ON(P4_PEBS_METRIC__max > P4_PEBS_CONFIG_METRIC_MASK);
idx = p4_config_unpack_metric(config);
if (idx == P4_PEBS_METRIC__none)
return;
bind = &p4_pebs_bind_map[idx];
(void)wrmsrl_safe(MSR_IA32_PEBS_ENABLE, (u64)bind->metric_pebs);
(void)wrmsrl_safe(MSR_P4_PEBS_MATRIX_VERT, (u64)bind->metric_vert);
}
static void __p4_pmu_enable_event(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int thread = p4_ht_config_thread(hwc->config);
u64 escr_conf = p4_config_unpack_escr(p4_clear_ht_bit(hwc->config));
unsigned int idx = p4_config_unpack_event(hwc->config);
struct p4_event_bind *bind;
u64 escr_addr, cccr;
bind = &p4_event_bind_map[idx];
escr_addr = bind->escr_msr[thread];
/*
* - we dont support cascaded counters yet
* - and counter 1 is broken (erratum)
*/
WARN_ON_ONCE(p4_is_event_cascaded(hwc->config));
WARN_ON_ONCE(hwc->idx == 1);
/* we need a real Event value */
escr_conf &= ~P4_ESCR_EVENT_MASK;
escr_conf |= P4_ESCR_EVENT(P4_OPCODE_EVNT(bind->opcode));
cccr = p4_config_unpack_cccr(hwc->config);
/*
* it could be Cache event so we need to write metrics
* into additional MSRs
*/
p4_pmu_enable_pebs(hwc->config);
(void)wrmsrl_safe(escr_addr, escr_conf);
(void)wrmsrl_safe(hwc->config_base,
(cccr & ~P4_CCCR_RESERVED) | P4_CCCR_ENABLE);
}
static DEFINE_PER_CPU(unsigned long [BITS_TO_LONGS(X86_PMC_IDX_MAX)], p4_running);
static void p4_pmu_enable_event(struct perf_event *event)
{
int idx = event->hw.idx;
__set_bit(idx, per_cpu(p4_running, smp_processor_id()));
__p4_pmu_enable_event(event);
}
static void p4_pmu_enable_all(int added)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
int idx;
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
struct perf_event *event = cpuc->events[idx];
if (!test_bit(idx, cpuc->active_mask))
continue;
__p4_pmu_enable_event(event);
}
}
static int p4_pmu_set_period(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
s64 left = this_cpu_read(pmc_prev_left[hwc->idx]);
int ret;
ret = x86_perf_event_set_period(event);
if (hwc->event_base) {
/*
* This handles erratum N15 in intel doc 249199-029,
* the counter may not be updated correctly on write
* so we need a second write operation to do the trick
* (the official workaround didn't work)
*
* the former idea is taken from OProfile code
*/
wrmsrl(hwc->event_base, (u64)(-left) & x86_pmu.cntval_mask);
}
return ret;
}
static int p4_pmu_handle_irq(struct pt_regs *regs)
{
struct perf_sample_data data;
struct cpu_hw_events *cpuc;
struct perf_event *event;
struct hw_perf_event *hwc;
int idx, handled = 0;
u64 val;
cpuc = this_cpu_ptr(&cpu_hw_events);
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
int overflow;
if (!test_bit(idx, cpuc->active_mask)) {
/* catch in-flight IRQs */
if (__test_and_clear_bit(idx, per_cpu(p4_running, smp_processor_id())))
handled++;
continue;
}
event = cpuc->events[idx];
hwc = &event->hw;
WARN_ON_ONCE(hwc->idx != idx);
/* it might be unflagged overflow */
overflow = p4_pmu_clear_cccr_ovf(hwc);
val = x86_perf_event_update(event);
if (!overflow && (val & (1ULL << (x86_pmu.cntval_bits - 1))))
continue;
handled += overflow;
/* event overflow for sure */
perf_sample_data_init(&data, 0, hwc->last_period);
if (!static_call(x86_pmu_set_period)(event))
continue;
if (perf_event_overflow(event, &data, regs))
x86_pmu_stop(event, 0);
}
if (handled)
inc_irq_stat(apic_perf_irqs);
/*
* When dealing with the unmasking of the LVTPC on P4 perf hw, it has
* been observed that the OVF bit flag has to be cleared first _before_
* the LVTPC can be unmasked.
*
* The reason is the NMI line will continue to be asserted while the OVF
* bit is set. This causes a second NMI to generate if the LVTPC is
* unmasked before the OVF bit is cleared, leading to unknown NMI
* messages.
*/
apic_write(APIC_LVTPC, APIC_DM_NMI);
return handled;
}
/*
* swap thread specific fields according to a thread
* we are going to run on
*/
static void p4_pmu_swap_config_ts(struct hw_perf_event *hwc, int cpu)
{
u32 escr, cccr;
/*
* we either lucky and continue on same cpu or no HT support
*/
if (!p4_should_swap_ts(hwc->config, cpu))
return;
/*
* the event is migrated from an another logical
* cpu, so we need to swap thread specific flags
*/
escr = p4_config_unpack_escr(hwc->config);
cccr = p4_config_unpack_cccr(hwc->config);
if (p4_ht_thread(cpu)) {
cccr &= ~P4_CCCR_OVF_PMI_T0;
cccr |= P4_CCCR_OVF_PMI_T1;
if (escr & P4_ESCR_T0_OS) {
escr &= ~P4_ESCR_T0_OS;
escr |= P4_ESCR_T1_OS;
}
if (escr & P4_ESCR_T0_USR) {
escr &= ~P4_ESCR_T0_USR;
escr |= P4_ESCR_T1_USR;
}
hwc->config = p4_config_pack_escr(escr);
hwc->config |= p4_config_pack_cccr(cccr);
hwc->config |= P4_CONFIG_HT;
} else {
cccr &= ~P4_CCCR_OVF_PMI_T1;
cccr |= P4_CCCR_OVF_PMI_T0;
if (escr & P4_ESCR_T1_OS) {
escr &= ~P4_ESCR_T1_OS;
escr |= P4_ESCR_T0_OS;
}
if (escr & P4_ESCR_T1_USR) {
escr &= ~P4_ESCR_T1_USR;
escr |= P4_ESCR_T0_USR;
}
hwc->config = p4_config_pack_escr(escr);
hwc->config |= p4_config_pack_cccr(cccr);
hwc->config &= ~P4_CONFIG_HT;
}
}
/*
* ESCR address hashing is tricky, ESCRs are not sequential
* in memory but all starts from MSR_P4_BSU_ESCR0 (0x03a0) and
* the metric between any ESCRs is laid in range [0xa0,0xe1]
*
* so we make ~70% filled hashtable
*/
#define P4_ESCR_MSR_BASE 0x000003a0
#define P4_ESCR_MSR_MAX 0x000003e1
#define P4_ESCR_MSR_TABLE_SIZE (P4_ESCR_MSR_MAX - P4_ESCR_MSR_BASE + 1)
#define P4_ESCR_MSR_IDX(msr) (msr - P4_ESCR_MSR_BASE)
#define P4_ESCR_MSR_TABLE_ENTRY(msr) [P4_ESCR_MSR_IDX(msr)] = msr
static const unsigned int p4_escr_table[P4_ESCR_MSR_TABLE_SIZE] = {
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_ALF_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_ALF_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_BPU_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_BPU_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_BSU_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_BSU_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR2),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR3),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR4),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR5),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_DAC_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_DAC_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FIRM_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FIRM_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FLAME_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FLAME_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FSB_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FSB_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IQ_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IQ_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IS_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IS_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_ITLB_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_ITLB_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IX_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IX_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_MOB_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_MOB_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_MS_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_MS_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_PMH_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_PMH_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_RAT_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_RAT_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_SAAT_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_SAAT_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_SSU_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_SSU_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_TBPU_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_TBPU_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_TC_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_TC_ESCR1),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_U2L_ESCR0),
P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_U2L_ESCR1),
};
static int p4_get_escr_idx(unsigned int addr)
{
unsigned int idx = P4_ESCR_MSR_IDX(addr);
if (unlikely(idx >= P4_ESCR_MSR_TABLE_SIZE ||
!p4_escr_table[idx] ||
p4_escr_table[idx] != addr)) {
WARN_ONCE(1, "P4 PMU: Wrong address passed: %x\n", addr);
return -1;
}
return idx;
}
static int p4_next_cntr(int thread, unsigned long *used_mask,
struct p4_event_bind *bind)
{
int i, j;
for (i = 0; i < P4_CNTR_LIMIT; i++) {
j = bind->cntr[thread][i];
if (j != -1 && !test_bit(j, used_mask))
return j;
}
return -1;
}
static int p4_pmu_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
{
unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
unsigned long escr_mask[BITS_TO_LONGS(P4_ESCR_MSR_TABLE_SIZE)];
int cpu = smp_processor_id();
struct hw_perf_event *hwc;
struct p4_event_bind *bind;
unsigned int i, thread, num;
int cntr_idx, escr_idx;
u64 config_alias;
int pass;
bitmap_zero(used_mask, X86_PMC_IDX_MAX);
bitmap_zero(escr_mask, P4_ESCR_MSR_TABLE_SIZE);
for (i = 0, num = n; i < n; i++, num--) {
hwc = &cpuc->event_list[i]->hw;
thread = p4_ht_thread(cpu);
pass = 0;
again:
/*
* It's possible to hit a circular lock
* between original and alternative events
* if both are scheduled already.
*/
if (pass > 2)
goto done;
bind = p4_config_get_bind(hwc->config);
escr_idx = p4_get_escr_idx(bind->escr_msr[thread]);
if (unlikely(escr_idx == -1))
goto done;
if (hwc->idx != -1 && !p4_should_swap_ts(hwc->config, cpu)) {
cntr_idx = hwc->idx;
if (assign)
assign[i] = hwc->idx;
goto reserve;
}
cntr_idx = p4_next_cntr(thread, used_mask, bind);
if (cntr_idx == -1 || test_bit(escr_idx, escr_mask)) {
/*
* Check whether an event alias is still available.
*/
config_alias = p4_get_alias_event(hwc->config);
if (!config_alias)
goto done;
hwc->config = config_alias;
pass++;
goto again;
}
/*
* Perf does test runs to see if a whole group can be assigned
* together successfully. There can be multiple rounds of this.
* Unfortunately, p4_pmu_swap_config_ts touches the hwc->config
* bits, such that the next round of group assignments will
* cause the above p4_should_swap_ts to pass instead of fail.
* This leads to counters exclusive to thread0 being used by
* thread1.
*
* Solve this with a cheap hack, reset the idx back to -1 to
* force a new lookup (p4_next_cntr) to get the right counter
* for the right thread.
*
* This probably doesn't comply with the general spirit of how
* perf wants to work, but P4 is special. :-(
*/
if (p4_should_swap_ts(hwc->config, cpu))
hwc->idx = -1;
p4_pmu_swap_config_ts(hwc, cpu);
if (assign)
assign[i] = cntr_idx;
reserve:
set_bit(cntr_idx, used_mask);
set_bit(escr_idx, escr_mask);
}
done:
return num ? -EINVAL : 0;
}
PMU_FORMAT_ATTR(cccr, "config:0-31" );
PMU_FORMAT_ATTR(escr, "config:32-62");
PMU_FORMAT_ATTR(ht, "config:63" );
static struct attribute *intel_p4_formats_attr[] = {
&format_attr_cccr.attr,
&format_attr_escr.attr,
&format_attr_ht.attr,
NULL,
};
static __initconst const struct x86_pmu p4_pmu = {
.name = "Netburst P4/Xeon",
.handle_irq = p4_pmu_handle_irq,
.disable_all = p4_pmu_disable_all,
.enable_all = p4_pmu_enable_all,
.enable = p4_pmu_enable_event,
.disable = p4_pmu_disable_event,
.set_period = p4_pmu_set_period,
.eventsel = MSR_P4_BPU_CCCR0,
.perfctr = MSR_P4_BPU_PERFCTR0,
.event_map = p4_pmu_event_map,
.max_events = ARRAY_SIZE(p4_general_events),
.get_event_constraints = x86_get_event_constraints,
/*
* IF HT disabled we may need to use all
* ARCH_P4_MAX_CCCR counters simultaneously
* though leave it restricted at moment assuming
* HT is on
*/
.num_counters = ARCH_P4_MAX_CCCR,
.apic = 1,
.cntval_bits = ARCH_P4_CNTRVAL_BITS,
.cntval_mask = ARCH_P4_CNTRVAL_MASK,
.max_period = (1ULL << (ARCH_P4_CNTRVAL_BITS - 1)) - 1,
.hw_config = p4_hw_config,
.schedule_events = p4_pmu_schedule_events,
.format_attrs = intel_p4_formats_attr,
};
__init int p4_pmu_init(void)
{
unsigned int low, high;
int i, reg;
/* If we get stripped -- indexing fails */
BUILD_BUG_ON(ARCH_P4_MAX_CCCR > INTEL_PMC_MAX_GENERIC);
rdmsr(MSR_IA32_MISC_ENABLE, low, high);
if (!(low & (1 << 7))) {
pr_cont("unsupported Netburst CPU model %d ",
boot_cpu_data.x86_model);
return -ENODEV;
}
memcpy(hw_cache_event_ids, p4_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
pr_cont("Netburst events, ");
x86_pmu = p4_pmu;
/*
* Even though the counters are configured to interrupt a particular
* logical processor when an overflow happens, testing has shown that
* on kdump kernels (which uses a single cpu), thread1's counter
* continues to run and will report an NMI on thread0. Due to the
* overflow bug, this leads to a stream of unknown NMIs.
*
* Solve this by zero'ing out the registers to mimic a reset.
*/
for (i = 0; i < x86_pmu.num_counters; i++) {
reg = x86_pmu_config_addr(i);
wrmsrl_safe(reg, 0ULL);
}
return 0;
}