// SPDX-License-Identifier: GPL-2.0
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/sched/clock.h>
#include <asm/cpu_entry_area.h>
#include <asm/debugreg.h>
#include <asm/perf_event.h>
#include <asm/tlbflush.h>
#include <asm/insn.h>
#include <asm/io.h>
#include <asm/msr.h>
#include <asm/timer.h>
#include "../perf_event.h"
/* Waste a full page so it can be mapped into the cpu_entry_area */
DEFINE_PER_CPU_PAGE_ALIGNED(struct debug_store, cpu_debug_store);
/* The size of a BTS record in bytes: */
#define BTS_RECORD_SIZE 24
#define PEBS_FIXUP_SIZE PAGE_SIZE
/*
* pebs_record_32 for p4 and core not supported
struct pebs_record_32 {
u32 flags, ip;
u32 ax, bc, cx, dx;
u32 si, di, bp, sp;
};
*/
union omr_encoding {
struct {
u8 omr_source : 4;
u8 omr_remote : 1;
u8 omr_hitm : 1;
u8 omr_snoop : 1;
u8 omr_promoted : 1;
};
u8 omr_full;
};
union intel_x86_pebs_dse {
u64 val;
struct {
unsigned int ld_dse:4;
unsigned int ld_stlb_miss:1;
unsigned int ld_locked:1;
unsigned int ld_data_blk:1;
unsigned int ld_addr_blk:1;
unsigned int ld_reserved:24;
};
struct {
unsigned int st_l1d_hit:1;
unsigned int st_reserved1:3;
unsigned int st_stlb_miss:1;
unsigned int st_locked:1;
unsigned int st_reserved2:26;
};
struct {
unsigned int st_lat_dse:4;
unsigned int st_lat_stlb_miss:1;
unsigned int st_lat_locked:1;
unsigned int ld_reserved3:26;
};
struct {
unsigned int mtl_dse:5;
unsigned int mtl_locked:1;
unsigned int mtl_stlb_miss:1;
unsigned int mtl_fwd_blk:1;
unsigned int ld_reserved4:24;
};
struct {
unsigned int lnc_dse:8;
unsigned int ld_reserved5:2;
unsigned int lnc_stlb_miss:1;
unsigned int lnc_locked:1;
unsigned int lnc_data_blk:1;
unsigned int lnc_addr_blk:1;
unsigned int ld_reserved6:18;
};
struct {
unsigned int pnc_dse: 8;
unsigned int pnc_l2_miss:1;
unsigned int pnc_stlb_clean_hit:1;
unsigned int pnc_stlb_any_hit:1;
unsigned int pnc_stlb_miss:1;
unsigned int pnc_locked:1;
unsigned int pnc_data_blk:1;
unsigned int pnc_addr_blk:1;
unsigned int pnc_fb_full:1;
unsigned int ld_reserved8:16;
};
struct {
unsigned int arw_dse:8;
unsigned int arw_l2_miss:1;
unsigned int arw_xq_promotion:1;
unsigned int arw_reissue:1;
unsigned int arw_stlb_miss:1;
unsigned int arw_locked:1;
unsigned int arw_data_blk:1;
unsigned int arw_addr_blk:1;
unsigned int arw_fb_full:1;
unsigned int ld_reserved9:16;
};
};
/*
* Map PEBS Load Latency Data Source encodings to generic
* memory data source information
*/
#define P(a, b) PERF_MEM_S(a, b)
#define OP_LH (P(OP, LOAD) | P(LVL, HIT))
#define LEVEL(x) P(LVLNUM, x)
#define REM P(REMOTE, REMOTE)
#define SNOOP_NONE_MISS (P(SNOOP, NONE) | P(SNOOP, MISS))
/* Version for Sandy Bridge and later */
static u64 pebs_data_source[PERF_PEBS_DATA_SOURCE_MAX] = {
P(OP, LOAD) | P(LVL, MISS) | LEVEL(L3) | P(SNOOP, NA),/* 0x00:ukn L3 */
OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x01: L1 local */
OP_LH | P(LVL, LFB) | LEVEL(LFB) | P(SNOOP, NONE), /* 0x02: LFB hit */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, NONE), /* 0x03: L2 hit */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, NONE), /* 0x04: L3 hit */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, MISS), /* 0x05: L3 hit, snoop miss */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HIT), /* 0x06: L3 hit, snoop hit */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM), /* 0x07: L3 hit, snoop hitm */
OP_LH | P(LVL, REM_CCE1) | REM | LEVEL(L3) | P(SNOOP, HIT), /* 0x08: L3 miss snoop hit */
OP_LH | P(LVL, REM_CCE1) | REM | LEVEL(L3) | P(SNOOP, HITM), /* 0x09: L3 miss snoop hitm*/
OP_LH | P(LVL, LOC_RAM) | LEVEL(RAM) | P(SNOOP, HIT), /* 0x0a: L3 miss, shared */
OP_LH | P(LVL, REM_RAM1) | REM | LEVEL(L3) | P(SNOOP, HIT), /* 0x0b: L3 miss, shared */
OP_LH | P(LVL, LOC_RAM) | LEVEL(RAM) | SNOOP_NONE_MISS, /* 0x0c: L3 miss, excl */
OP_LH | P(LVL, REM_RAM1) | LEVEL(RAM) | REM | SNOOP_NONE_MISS, /* 0x0d: L3 miss, excl */
OP_LH | P(LVL, IO) | LEVEL(NA) | P(SNOOP, NONE), /* 0x0e: I/O */
OP_LH | P(LVL, UNC) | LEVEL(NA) | P(SNOOP, NONE), /* 0x0f: uncached */
};
/* Patch up minor differences in the bits */
void __init intel_pmu_pebs_data_source_nhm(void)
{
pebs_data_source[0x05] = OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HIT);
pebs_data_source[0x06] = OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM);
pebs_data_source[0x07] = OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM);
}
static void __init __intel_pmu_pebs_data_source_skl(bool pmem, u64 *data_source)
{
u64 pmem_or_l4 = pmem ? LEVEL(PMEM) : LEVEL(L4);
data_source[0x08] = OP_LH | pmem_or_l4 | P(SNOOP, HIT);
data_source[0x09] = OP_LH | pmem_or_l4 | REM | P(SNOOP, HIT);
data_source[0x0b] = OP_LH | LEVEL(RAM) | REM | P(SNOOP, NONE);
data_source[0x0c] = OP_LH | LEVEL(ANY_CACHE) | REM | P(SNOOPX, FWD);
data_source[0x0d] = OP_LH | LEVEL(ANY_CACHE) | REM | P(SNOOP, HITM);
}
void __init intel_pmu_pebs_data_source_skl(bool pmem)
{
__intel_pmu_pebs_data_source_skl(pmem, pebs_data_source);
}
static void __init __intel_pmu_pebs_data_source_grt(u64 *data_source)
{
data_source[0x05] = OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HIT);
data_source[0x06] = OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM);
data_source[0x08] = OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOPX, FWD);
}
void __init intel_pmu_pebs_data_source_grt(void)
{
__intel_pmu_pebs_data_source_grt(pebs_data_source);
}
void __init intel_pmu_pebs_data_source_adl(void)
{
u64 *data_source;
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_CORE_IDX].pebs_data_source;
memcpy(data_source, pebs_data_source, sizeof(pebs_data_source));
__intel_pmu_pebs_data_source_skl(false, data_source);
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_ATOM_IDX].pebs_data_source;
memcpy(data_source, pebs_data_source, sizeof(pebs_data_source));
__intel_pmu_pebs_data_source_grt(data_source);
}
static void __init __intel_pmu_pebs_data_source_cmt(u64 *data_source)
{
data_source[0x07] = OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOPX, FWD);
data_source[0x08] = OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM);
data_source[0x0a] = OP_LH | P(LVL, LOC_RAM) | LEVEL(RAM) | P(SNOOP, NONE);
data_source[0x0b] = OP_LH | LEVEL(RAM) | REM | P(SNOOP, NONE);
data_source[0x0c] = OP_LH | LEVEL(RAM) | REM | P(SNOOPX, FWD);
data_source[0x0d] = OP_LH | LEVEL(RAM) | REM | P(SNOOP, HITM);
}
void __init intel_pmu_pebs_data_source_mtl(void)
{
u64 *data_source;
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_CORE_IDX].pebs_data_source;
memcpy(data_source, pebs_data_source, sizeof(pebs_data_source));
__intel_pmu_pebs_data_source_skl(false, data_source);
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_ATOM_IDX].pebs_data_source;
memcpy(data_source, pebs_data_source, sizeof(pebs_data_source));
__intel_pmu_pebs_data_source_cmt(data_source);
}
void __init intel_pmu_pebs_data_source_arl_h(void)
{
u64 *data_source;
intel_pmu_pebs_data_source_lnl();
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_TINY_IDX].pebs_data_source;
memcpy(data_source, pebs_data_source, sizeof(pebs_data_source));
__intel_pmu_pebs_data_source_cmt(data_source);
}
void __init intel_pmu_pebs_data_source_cmt(void)
{
__intel_pmu_pebs_data_source_cmt(pebs_data_source);
}
/* Version for Lion Cove and later */
static u64 lnc_pebs_data_source[PERF_PEBS_DATA_SOURCE_MAX] = {
P(OP, LOAD) | P(LVL, MISS) | LEVEL(L3) | P(SNOOP, NA), /* 0x00: ukn L3 */
OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x01: L1 hit */
OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x02: L1 hit */
OP_LH | P(LVL, LFB) | LEVEL(LFB) | P(SNOOP, NONE), /* 0x03: LFB/L1 Miss Handling Buffer hit */
0, /* 0x04: Reserved */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, NONE), /* 0x05: L2 Hit */
OP_LH | LEVEL(L2_MHB) | P(SNOOP, NONE), /* 0x06: L2 Miss Handling Buffer Hit */
0, /* 0x07: Reserved */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, NONE), /* 0x08: L3 Hit */
0, /* 0x09: Reserved */
0, /* 0x0a: Reserved */
0, /* 0x0b: Reserved */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOPX, FWD), /* 0x0c: L3 Hit Snoop Fwd */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM), /* 0x0d: L3 Hit Snoop HitM */
0, /* 0x0e: Reserved */
P(OP, LOAD) | P(LVL, MISS) | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM), /* 0x0f: L3 Miss Snoop HitM */
OP_LH | LEVEL(MSC) | P(SNOOP, NONE), /* 0x10: Memory-side Cache Hit */
OP_LH | P(LVL, LOC_RAM) | LEVEL(RAM) | P(SNOOP, NONE), /* 0x11: Local Memory Hit */
};
void __init intel_pmu_pebs_data_source_lnl(void)
{
u64 *data_source;
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_CORE_IDX].pebs_data_source;
memcpy(data_source, lnc_pebs_data_source, sizeof(lnc_pebs_data_source));
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_ATOM_IDX].pebs_data_source;
memcpy(data_source, pebs_data_source, sizeof(pebs_data_source));
__intel_pmu_pebs_data_source_cmt(data_source);
}
/* Version for Panthercove and later */
/* L2 hit */
#define PNC_PEBS_DATA_SOURCE_MAX 16
static u64 pnc_pebs_l2_hit_data_source[PNC_PEBS_DATA_SOURCE_MAX] = {
P(OP, LOAD) | P(LVL, NA) | LEVEL(NA) | P(SNOOP, NA), /* 0x00: non-cache access */
OP_LH | LEVEL(L0) | P(SNOOP, NONE), /* 0x01: L0 hit */
OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x02: L1 hit */
OP_LH | P(LVL, LFB) | LEVEL(LFB) | P(SNOOP, NONE), /* 0x03: L1 Miss Handling Buffer hit */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, NONE), /* 0x04: L2 Hit Clean */
0, /* 0x05: Reserved */
0, /* 0x06: Reserved */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, HIT), /* 0x07: L2 Hit Snoop HIT */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, HITM), /* 0x08: L2 Hit Snoop Hit Modified */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, MISS), /* 0x09: Prefetch Promotion */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, MISS), /* 0x0a: Cross Core Prefetch Promotion */
0, /* 0x0b: Reserved */
0, /* 0x0c: Reserved */
0, /* 0x0d: Reserved */
0, /* 0x0e: Reserved */
OP_LH | P(LVL, UNC) | LEVEL(NA) | P(SNOOP, NONE), /* 0x0f: uncached */
};
/* Version for Arctic Wolf and later */
/* L2 hit */
#define ARW_PEBS_DATA_SOURCE_MAX 16
static u64 arw_pebs_l2_hit_data_source[ARW_PEBS_DATA_SOURCE_MAX] = {
P(OP, LOAD) | P(LVL, NA) | LEVEL(NA) | P(SNOOP, NA), /* 0x00: non-cache access */
OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x01: L1 hit */
OP_LH | P(LVL, LFB) | LEVEL(LFB) | P(SNOOP, NONE), /* 0x02: WCB Hit */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, NONE), /* 0x03: L2 Hit Clean */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, HIT), /* 0x04: L2 Hit Snoop HIT */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, HITM), /* 0x05: L2 Hit Snoop Hit Modified */
OP_LH | P(LVL, UNC) | LEVEL(NA) | P(SNOOP, NONE), /* 0x06: uncached */
0, /* 0x07: Reserved */
0, /* 0x08: Reserved */
0, /* 0x09: Reserved */
0, /* 0x0a: Reserved */
0, /* 0x0b: Reserved */
0, /* 0x0c: Reserved */
0, /* 0x0d: Reserved */
0, /* 0x0e: Reserved */
0, /* 0x0f: Reserved */
};
/* L2 miss */
#define OMR_DATA_SOURCE_MAX 16
static u64 omr_data_source[OMR_DATA_SOURCE_MAX] = {
P(OP, LOAD) | P(LVL, NA) | LEVEL(NA) | P(SNOOP, NA), /* 0x00: invalid */
0, /* 0x01: Reserved */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(REGION, L_SHARE), /* 0x02: local CA shared cache */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(REGION, L_NON_SHARE),/* 0x03: local CA non-shared cache */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(REGION, O_IO), /* 0x04: other CA IO agent */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(REGION, O_SHARE), /* 0x05: other CA shared cache */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(REGION, O_NON_SHARE),/* 0x06: other CA non-shared cache */
OP_LH | LEVEL(RAM) | P(REGION, MMIO), /* 0x07: MMIO */
OP_LH | LEVEL(RAM) | P(REGION, MEM0), /* 0x08: Memory region 0 */
OP_LH | LEVEL(RAM) | P(REGION, MEM1), /* 0x09: Memory region 1 */
OP_LH | LEVEL(RAM) | P(REGION, MEM2), /* 0x0a: Memory region 2 */
OP_LH | LEVEL(RAM) | P(REGION, MEM3), /* 0x0b: Memory region 3 */
OP_LH | LEVEL(RAM) | P(REGION, MEM4), /* 0x0c: Memory region 4 */
OP_LH | LEVEL(RAM) | P(REGION, MEM5), /* 0x0d: Memory region 5 */
OP_LH | LEVEL(RAM) | P(REGION, MEM6), /* 0x0e: Memory region 6 */
OP_LH | LEVEL(RAM) | P(REGION, MEM7), /* 0x0f: Memory region 7 */
};
static u64 parse_omr_data_source(u8 dse)
{
union omr_encoding omr;
u64 val = 0;
omr.omr_full = dse;
val = omr_data_source[omr.omr_source];
if (omr.omr_source > 0x1 && omr.omr_source < 0x7)
val |= omr.omr_remote ? P(LVL, REM_CCE1) : 0;
else if (omr.omr_source > 0x7)
val |= omr.omr_remote ? P(LVL, REM_RAM1) : P(LVL, LOC_RAM);
if (omr.omr_remote)
val |= REM;
if (omr.omr_source == 0x2) {
u8 snoop = omr.omr_snoop | (omr.omr_promoted << 1);
if (omr.omr_hitm)
val |= P(SNOOP, HITM);
else if (snoop == 0x0)
val |= P(SNOOP, NA);
else if (snoop == 0x1)
val |= P(SNOOP, MISS);
else if (snoop == 0x2)
val |= P(SNOOP, HIT);
else if (snoop == 0x3)
val |= P(SNOOP, NONE);
} else if (omr.omr_source > 0x2 && omr.omr_source < 0x7) {
val |= omr.omr_hitm ? P(SNOOP, HITM) : P(SNOOP, HIT);
val |= omr.omr_snoop ? P(SNOOPX, FWD) : 0;
} else {
val |= P(SNOOP, NONE);
}
return val;
}
static u64 precise_store_data(u64 status)
{
union intel_x86_pebs_dse dse;
u64 val = P(OP, STORE) | P(SNOOP, NA) | P(LVL, L1) | P(TLB, L2);
dse.val = status;
/*
* bit 4: TLB access
* 1 = stored missed 2nd level TLB
*
* so it either hit the walker or the OS
* otherwise hit 2nd level TLB
*/
if (dse.st_stlb_miss)
val |= P(TLB, MISS);
else
val |= P(TLB, HIT);
/*
* bit 0: hit L1 data cache
* if not set, then all we know is that
* it missed L1D
*/
if (dse.st_l1d_hit)
val |= P(LVL, HIT);
else
val |= P(LVL, MISS);
/*
* bit 5: Locked prefix
*/
if (dse.st_locked)
val |= P(LOCK, LOCKED);
return val;
}
static u64 precise_datala_hsw(struct perf_event *event, u64 status)
{
union perf_mem_data_src dse;
dse.val = PERF_MEM_NA;
if (event->hw.flags & PERF_X86_EVENT_PEBS_ST_HSW)
dse.mem_op = PERF_MEM_OP_STORE;
else if (event->hw.flags & PERF_X86_EVENT_PEBS_LD_HSW)
dse.mem_op = PERF_MEM_OP_LOAD;
/*
* L1 info only valid for following events:
*
* MEM_UOPS_RETIRED.STLB_MISS_STORES
* MEM_UOPS_RETIRED.LOCK_STORES
* MEM_UOPS_RETIRED.SPLIT_STORES
* MEM_UOPS_RETIRED.ALL_STORES
*/
if (event->hw.flags & PERF_X86_EVENT_PEBS_ST_HSW) {
if (status & 1)
dse.mem_lvl = PERF_MEM_LVL_L1 | PERF_MEM_LVL_HIT;
else
dse.mem_lvl = PERF_MEM_LVL_L1 | PERF_MEM_LVL_MISS;
}
return dse.val;
}
static inline void pebs_set_tlb_lock(u64 *val, bool tlb, bool lock)
{
/*
* TLB access
* 0 = did not miss 2nd level TLB
* 1 = missed 2nd level TLB
*/
if (tlb)
*val |= P(TLB, MISS) | P(TLB, L2);
else
*val |= P(TLB, HIT) | P(TLB, L1) | P(TLB, L2);
/* locked prefix */
if (lock)
*val |= P(LOCK, LOCKED);
}
/* Retrieve the latency data for e-core of ADL */
static u64 __grt_latency_data(struct perf_event *event, u64 status,
u8 dse, bool tlb, bool lock, bool blk)
{
u64 val;
WARN_ON_ONCE(is_hybrid() &&
hybrid_pmu(event->pmu)->pmu_type == hybrid_big);
dse &= PERF_PEBS_DATA_SOURCE_GRT_MASK;
val = hybrid_var(event->pmu, pebs_data_source)[dse];
pebs_set_tlb_lock(&val, tlb, lock);
if (blk)
val |= P(BLK, DATA);
else
val |= P(BLK, NA);
return val;
}
u64 grt_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
dse.val = status;
return __grt_latency_data(event, status, dse.ld_dse,
dse.ld_locked, dse.ld_stlb_miss,
dse.ld_data_blk);
}
/* Retrieve the latency data for e-core of MTL */
u64 cmt_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
dse.val = status;
return __grt_latency_data(event, status, dse.mtl_dse,
dse.mtl_stlb_miss, dse.mtl_locked,
dse.mtl_fwd_blk);
}
static u64 arw_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
union perf_mem_data_src src;
u64 val;
dse.val = status;
if (!dse.arw_l2_miss)
val = arw_pebs_l2_hit_data_source[dse.arw_dse & 0xf];
else
val = parse_omr_data_source(dse.arw_dse);
if (!val)
val = P(OP, LOAD) | LEVEL(NA) | P(SNOOP, NA);
if (dse.arw_stlb_miss)
val |= P(TLB, MISS) | P(TLB, L2);
else
val |= P(TLB, HIT) | P(TLB, L1) | P(TLB, L2);
if (dse.arw_locked)
val |= P(LOCK, LOCKED);
if (dse.arw_data_blk)
val |= P(BLK, DATA);
if (dse.arw_addr_blk)
val |= P(BLK, ADDR);
if (!dse.arw_data_blk && !dse.arw_addr_blk)
val |= P(BLK, NA);
src.val = val;
if (event->hw.flags & PERF_X86_EVENT_PEBS_ST_HSW)
src.mem_op = P(OP, STORE);
return src.val;
}
static u64 lnc_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
union perf_mem_data_src src;
u64 val;
dse.val = status;
/* LNC core latency data */
val = hybrid_var(event->pmu, pebs_data_source)[status & PERF_PEBS_DATA_SOURCE_MASK];
if (!val)
val = P(OP, LOAD) | LEVEL(NA) | P(SNOOP, NA);
if (dse.lnc_stlb_miss)
val |= P(TLB, MISS) | P(TLB, L2);
else
val |= P(TLB, HIT) | P(TLB, L1) | P(TLB, L2);
if (dse.lnc_locked)
val |= P(LOCK, LOCKED);
if (dse.lnc_data_blk)
val |= P(BLK, DATA);
if (dse.lnc_addr_blk)
val |= P(BLK, ADDR);
if (!dse.lnc_data_blk && !dse.lnc_addr_blk)
val |= P(BLK, NA);
src.val = val;
if (event->hw.flags & PERF_X86_EVENT_PEBS_ST_HSW)
src.mem_op = P(OP, STORE);
return src.val;
}
u64 lnl_latency_data(struct perf_event *event, u64 status)
{
struct x86_hybrid_pmu *pmu = hybrid_pmu(event->pmu);
if (pmu->pmu_type == hybrid_small)
return cmt_latency_data(event, status);
return lnc_latency_data(event, status);
}
u64 arl_h_latency_data(struct perf_event *event, u64 status)
{
struct x86_hybrid_pmu *pmu = hybrid_pmu(event->pmu);
if (pmu->pmu_type == hybrid_tiny)
return cmt_latency_data(event, status);
return lnl_latency_data(event, status);
}
u64 pnc_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
union perf_mem_data_src src;
u64 val;
dse.val = status;
if (!dse.pnc_l2_miss)
val = pnc_pebs_l2_hit_data_source[dse.pnc_dse & 0xf];
else
val = parse_omr_data_source(dse.pnc_dse);
if (!val)
val = P(OP, LOAD) | LEVEL(NA) | P(SNOOP, NA);
if (dse.pnc_stlb_miss)
val |= P(TLB, MISS) | P(TLB, L2);
else
val |= P(TLB, HIT) | P(TLB, L1) | P(TLB, L2);
if (dse.pnc_locked)
val |= P(LOCK, LOCKED);
if (dse.pnc_data_blk)
val |= P(BLK, DATA);
if (dse.pnc_addr_blk)
val |= P(BLK, ADDR);
if (!dse.pnc_data_blk && !dse.pnc_addr_blk)
val |= P(BLK, NA);
src.val = val;
if (event->hw.flags & PERF_X86_EVENT_PEBS_ST_HSW)
src.mem_op = P(OP, STORE);
return src.val;
}
u64 nvl_latency_data(struct perf_event *event, u64 status)
{
struct x86_hybrid_pmu *pmu = hybrid_pmu(event->pmu);
if (pmu->pmu_type == hybrid_small)
return arw_latency_data(event, status);
return pnc_latency_data(event, status);
}
static u64 load_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
u64 val;
dse.val = status;
/*
* use the mapping table for bit 0-3
*/
val = hybrid_var(event->pmu, pebs_data_source)[dse.ld_dse];
/*
* Nehalem models do not support TLB, Lock infos
*/
if (x86_pmu.pebs_no_tlb) {
val |= P(TLB, NA) | P(LOCK, NA);
return val;
}
pebs_set_tlb_lock(&val, dse.ld_stlb_miss, dse.ld_locked);
/*
* Ice Lake and earlier models do not support block infos.
*/
if (!x86_pmu.pebs_block) {
val |= P(BLK, NA);
return val;
}
/*
* bit 6: load was blocked since its data could not be forwarded
* from a preceding store
*/
if (dse.ld_data_blk)
val |= P(BLK, DATA);
/*
* bit 7: load was blocked due to potential address conflict with
* a preceding store
*/
if (dse.ld_addr_blk)
val |= P(BLK, ADDR);
if (!dse.ld_data_blk && !dse.ld_addr_blk)
val |= P(BLK, NA);
return val;
}
static u64 store_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
union perf_mem_data_src src;
u64 val;
dse.val = status;
/*
* use the mapping table for bit 0-3
*/
val = hybrid_var(event->pmu, pebs_data_source)[dse.st_lat_dse];
pebs_set_tlb_lock(&val, dse.st_lat_stlb_miss, dse.st_lat_locked);
val |= P(BLK, NA);
/*
* the pebs_data_source table is only for loads
* so override the mem_op to say STORE instead
*/
src.val = val;
src.mem_op = P(OP,STORE);
return src.val;
}
struct pebs_record_core {
u64 flags, ip;
u64 ax, bx, cx, dx;
u64 si, di, bp, sp;
u64 r8, r9, r10, r11;
u64 r12, r13, r14, r15;
};
struct pebs_record_nhm {
u64 flags, ip;
u64 ax, bx, cx, dx;
u64 si, di, bp, sp;
u64 r8, r9, r10, r11;
u64 r12, r13, r14, r15;
u64 status, dla, dse, lat;
};
/*
* Same as pebs_record_nhm, with two additional fields.
*/
struct pebs_record_hsw {
u64 flags, ip;
u64 ax, bx, cx, dx;
u64 si, di, bp, sp;
u64 r8, r9, r10, r11;
u64 r12, r13, r14, r15;
u64 status, dla, dse, lat;
u64 real_ip, tsx_tuning;
};
union hsw_tsx_tuning {
struct {
u32 cycles_last_block : 32,
hle_abort : 1,
rtm_abort : 1,
instruction_abort : 1,
non_instruction_abort : 1,
retry : 1,
data_conflict : 1,
capacity_writes : 1,
capacity_reads : 1;
};
u64 value;
};
#define PEBS_HSW_TSX_FLAGS 0xff00000000ULL
/* Same as HSW, plus TSC */
struct pebs_record_skl {
u64 flags, ip;
u64 ax, bx, cx, dx;
u64 si, di, bp, sp;
u64 r8, r9, r10, r11;
u64 r12, r13, r14, r15;
u64 status, dla, dse, lat;
u64 real_ip, tsx_tuning;
u64 tsc;
};
void init_debug_store_on_cpu(int cpu)
{
struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
if (!ds)
return;
wrmsrq_on_cpu(cpu, MSR_IA32_DS_AREA, (u64)(unsigned long)ds);
}
void fini_debug_store_on_cpu(int cpu)
{
if (!per_cpu(cpu_hw_events, cpu).ds)
return;
wrmsrq_on_cpu(cpu, MSR_IA32_DS_AREA, 0);
}
static DEFINE_PER_CPU(void *, insn_buffer);
static void ds_update_cea(void *cea, void *addr, size_t size, pgprot_t prot)
{
unsigned long start = (unsigned long)cea;
phys_addr_t pa;
size_t msz = 0;
pa = virt_to_phys(addr);
preempt_disable();
for (; msz < size; msz += PAGE_SIZE, pa += PAGE_SIZE, cea += PAGE_SIZE)
cea_set_pte(cea, pa, prot);
/*
* This is a cross-CPU update of the cpu_entry_area, we must shoot down
* all TLB entries for it.
*/
flush_tlb_kernel_range(start, start + size);
preempt_enable();
}
static void ds_clear_cea(void *cea, size_t size)
{
unsigned long start = (unsigned long)cea;
size_t msz = 0;
preempt_disable();
for (; msz < size; msz += PAGE_SIZE, cea += PAGE_SIZE)
cea_set_pte(cea, 0, PAGE_NONE);
flush_tlb_kernel_range(start, start + size);
preempt_enable();
}
static void *dsalloc_pages(size_t size, gfp_t flags, int cpu)
{
unsigned int order = get_order(size);
int node = cpu_to_node(cpu);
struct page *page;
page = alloc_pages_node(node, flags | __GFP_ZERO, order);
return page ? page_address(page) : NULL;
}
static void dsfree_pages(const void *buffer, size_t size)
{
if (buffer)
free_pages((unsigned long)buffer, get_order(size));
}
static int alloc_pebs_buffer(int cpu)
{
struct cpu_hw_events *hwev = per_cpu_ptr(&cpu_hw_events, cpu);
struct debug_store *ds = hwev->ds;
size_t bsiz = x86_pmu.pebs_buffer_size;
int max, node = cpu_to_node(cpu);
void *buffer, *insn_buff, *cea;
if (!intel_pmu_has_pebs())
return 0;
buffer = dsalloc_pages(bsiz, GFP_KERNEL, cpu);
if (unlikely(!buffer))
return -ENOMEM;
if (x86_pmu.arch_pebs) {
hwev->pebs_vaddr = buffer;
return 0;
}
/*
* HSW+ already provides us the eventing ip; no need to allocate this
* buffer then.
*/
if (x86_pmu.intel_cap.pebs_format < 2) {
insn_buff = kzalloc_node(PEBS_FIXUP_SIZE, GFP_KERNEL, node);
if (!insn_buff) {
dsfree_pages(buffer, bsiz);
return -ENOMEM;
}
per_cpu(insn_buffer, cpu) = insn_buff;
}
hwev->pebs_vaddr = buffer;
/* Update the cpu entry area mapping */
cea = &get_cpu_entry_area(cpu)->cpu_debug_buffers.pebs_buffer;
ds->pebs_buffer_base = (unsigned long) cea;
ds_update_cea(cea, buffer, bsiz, PAGE_KERNEL);
ds->pebs_index = ds->pebs_buffer_base;
max = x86_pmu.pebs_record_size * (bsiz / x86_pmu.pebs_record_size);
ds->pebs_absolute_maximum = ds->pebs_buffer_base + max;
return 0;
}
static void release_pebs_buffer(int cpu)
{
struct cpu_hw_events *hwev = per_cpu_ptr(&cpu_hw_events, cpu);
void *cea;
if (!intel_pmu_has_pebs())
return;
if (x86_pmu.ds_pebs) {
kfree(per_cpu(insn_buffer, cpu));
per_cpu(insn_buffer, cpu) = NULL;
/* Clear the fixmap */
cea = &get_cpu_entry_area(cpu)->cpu_debug_buffers.pebs_buffer;
ds_clear_cea(cea, x86_pmu.pebs_buffer_size);
}
dsfree_pages(hwev->pebs_vaddr, x86_pmu.pebs_buffer_size);
hwev->pebs_vaddr = NULL;
}
static int alloc_bts_buffer(int cpu)
{
struct cpu_hw_events *hwev = per_cpu_ptr(&cpu_hw_events, cpu);
struct debug_store *ds = hwev->ds;
void *buffer, *cea;
int max;
if (!x86_pmu.bts)
return 0;
buffer = dsalloc_pages(BTS_BUFFER_SIZE, GFP_KERNEL | __GFP_NOWARN, cpu);
if (unlikely(!buffer)) {
WARN_ONCE(1, "%s: BTS buffer allocation failure\n", __func__);
return -ENOMEM;
}
hwev->ds_bts_vaddr = buffer;
/* Update the fixmap */
cea = &get_cpu_entry_area(cpu)->cpu_debug_buffers.bts_buffer;
ds->bts_buffer_base = (unsigned long) cea;
ds_update_cea(cea, buffer, BTS_BUFFER_SIZE, PAGE_KERNEL);
ds->bts_index = ds->bts_buffer_base;
max = BTS_BUFFER_SIZE / BTS_RECORD_SIZE;
ds->bts_absolute_maximum = ds->bts_buffer_base +
max * BTS_RECORD_SIZE;
ds->bts_interrupt_threshold = ds->bts_absolute_maximum -
(max / 16) * BTS_RECORD_SIZE;
return 0;
}
static void release_bts_buffer(int cpu)
{
struct cpu_hw_events *hwev = per_cpu_ptr(&cpu_hw_events, cpu);
void *cea;
if (!x86_pmu.bts)
return;
/* Clear the fixmap */
cea = &get_cpu_entry_area(cpu)->cpu_debug_buffers.bts_buffer;
ds_clear_cea(cea, BTS_BUFFER_SIZE);
dsfree_pages(hwev->ds_bts_vaddr, BTS_BUFFER_SIZE);
hwev->ds_bts_vaddr = NULL;
}
static int alloc_ds_buffer(int cpu)
{
struct debug_store *ds = &get_cpu_entry_area(cpu)->cpu_debug_store;
memset(ds, 0, sizeof(*ds));
per_cpu(cpu_hw_events, cpu).ds = ds;
return 0;
}
static void release_ds_buffer(int cpu)
{
per_cpu(cpu_hw_events, cpu).ds = NULL;
}
void release_ds_buffers(void)
{
int cpu;
if (!x86_pmu.bts && !x86_pmu.ds_pebs)
return;
for_each_possible_cpu(cpu)
release_ds_buffer(cpu);
for_each_possible_cpu(cpu) {
/*
* Again, ignore errors from offline CPUs, they will no longer
* observe cpu_hw_events.ds and not program the DS_AREA when
* they come up.
*/
fini_debug_store_on_cpu(cpu);
}
for_each_possible_cpu(cpu) {
if (x86_pmu.ds_pebs)
release_pebs_buffer(cpu);
release_bts_buffer(cpu);
}
}
void reserve_ds_buffers(void)
{
int bts_err = 0, pebs_err = 0;
int cpu;
x86_pmu.bts_active = 0;
if (x86_pmu.ds_pebs)
x86_pmu.pebs_active = 0;
if (!x86_pmu.bts && !x86_pmu.ds_pebs)
return;
if (!x86_pmu.bts)
bts_err = 1;
if (!x86_pmu.ds_pebs)
pebs_err = 1;
for_each_possible_cpu(cpu) {
if (alloc_ds_buffer(cpu)) {
bts_err = 1;
pebs_err = 1;
}
if (!bts_err && alloc_bts_buffer(cpu))
bts_err = 1;
if (x86_pmu.ds_pebs && !pebs_err &&
alloc_pebs_buffer(cpu))
pebs_err = 1;
if (bts_err && pebs_err)
break;
}
if (bts_err) {
for_each_possible_cpu(cpu)
release_bts_buffer(cpu);
}
if (x86_pmu.ds_pebs && pebs_err) {
for_each_possible_cpu(cpu)
release_pebs_buffer(cpu);
}
if (bts_err && pebs_err) {
for_each_possible_cpu(cpu)
release_ds_buffer(cpu);
} else {
if (x86_pmu.bts && !bts_err)
x86_pmu.bts_active = 1;
if (x86_pmu.ds_pebs && !pebs_err)
x86_pmu.pebs_active = 1;
for_each_possible_cpu(cpu) {
/*
* Ignores wrmsr_on_cpu() errors for offline CPUs they
* will get this call through intel_pmu_cpu_starting().
*/
init_debug_store_on_cpu(cpu);
}
}
}
inline int alloc_arch_pebs_buf_on_cpu(int cpu)
{
if (!x86_pmu.arch_pebs)
return 0;
return alloc_pebs_buffer(cpu);
}
inline void release_arch_pebs_buf_on_cpu(int cpu)
{
if (!x86_pmu.arch_pebs)
return;
release_pebs_buffer(cpu);
}
void init_arch_pebs_on_cpu(int cpu)
{
struct cpu_hw_events *cpuc = per_cpu_ptr(&cpu_hw_events, cpu);
u64 arch_pebs_base;
if (!x86_pmu.arch_pebs)
return;
if (!cpuc->pebs_vaddr) {
WARN(1, "Fail to allocate PEBS buffer on CPU %d\n", cpu);
x86_pmu.pebs_active = 0;
return;
}
/*
* 4KB-aligned pointer of the output buffer
* (alloc_pages_node() returns page aligned address)
* Buffer Size = 4KB * 2^SIZE
* contiguous physical buffer (alloc_pages_node() with order)
*/
arch_pebs_base = virt_to_phys(cpuc->pebs_vaddr) | PEBS_BUFFER_SHIFT;
wrmsrq_on_cpu(cpu, MSR_IA32_PEBS_BASE, arch_pebs_base);
x86_pmu.pebs_active = 1;
}
inline void fini_arch_pebs_on_cpu(int cpu)
{
if (!x86_pmu.arch_pebs)
return;
wrmsrq_on_cpu(cpu, MSR_IA32_PEBS_BASE, 0);
}
/*
* BTS
*/
struct event_constraint bts_constraint =
EVENT_CONSTRAINT(0, 1ULL << INTEL_PMC_IDX_FIXED_BTS, 0);
void intel_pmu_enable_bts(u64 config)
{
unsigned long debugctlmsr;
debugctlmsr = get_debugctlmsr();
debugctlmsr |= DEBUGCTLMSR_TR;
debugctlmsr |= DEBUGCTLMSR_BTS;
if (config & ARCH_PERFMON_EVENTSEL_INT)
debugctlmsr |= DEBUGCTLMSR_BTINT;
if (!(config & ARCH_PERFMON_EVENTSEL_OS))
debugctlmsr |= DEBUGCTLMSR_BTS_OFF_OS;
if (!(config & ARCH_PERFMON_EVENTSEL_USR))
debugctlmsr |= DEBUGCTLMSR_BTS_OFF_USR;
update_debugctlmsr(debugctlmsr);
}
void intel_pmu_disable_bts(void)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
unsigned long debugctlmsr;
if (!cpuc->ds)
return;
debugctlmsr = get_debugctlmsr();
debugctlmsr &=
~(DEBUGCTLMSR_TR | DEBUGCTLMSR_BTS | DEBUGCTLMSR_BTINT |
DEBUGCTLMSR_BTS_OFF_OS | DEBUGCTLMSR_BTS_OFF_USR);
update_debugctlmsr(debugctlmsr);
}
int intel_pmu_drain_bts_buffer(void)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct debug_store *ds = cpuc->ds;
struct bts_record {
u64 from;
u64 to;
u64 flags;
};
struct perf_event *event = cpuc->events[INTEL_PMC_IDX_FIXED_BTS];
struct bts_record *at, *base, *top;
struct perf_output_handle handle;
struct perf_event_header header;
struct perf_sample_data data;
unsigned long skip = 0;
struct pt_regs regs;
if (!event)
return 0;
if (!x86_pmu.bts_active)
return 0;
base = (struct bts_record *)(unsigned long)ds->bts_buffer_base;
top = (struct bts_record *)(unsigned long)ds->bts_index;
if (top <= base)
return 0;
memset(®s, 0, sizeof(regs));
ds->bts_index = ds->bts_buffer_base;
perf_sample_data_init(&data, 0, event->hw.last_period);
/*
* BTS leaks kernel addresses in branches across the cpl boundary,
* such as traps or system calls, so unless the user is asking for
* kernel tracing (and right now it's not possible), we'd need to
* filter them out. But first we need to count how many of those we
* have in the current batch. This is an extra O(n) pass, however,
* it's much faster than the other one especially considering that
* n <= 2560 (BTS_BUFFER_SIZE / BTS_RECORD_SIZE * 15/16; see the
* alloc_bts_buffer()).
*/
for (at = base; at < top; at++) {
/*
* Note that right now *this* BTS code only works if
* attr::exclude_kernel is set, but let's keep this extra
* check here in case that changes.
*/
if (event->attr.exclude_kernel &&
(kernel_ip(at->from) || kernel_ip(at->to)))
skip++;
}
/*
* Prepare a generic sample, i.e. fill in the invariant fields.
* We will overwrite the from and to address before we output
* the sample.
*/
rcu_read_lock();
perf_prepare_sample(&data, event, ®s);
perf_prepare_header(&header, &data, event, ®s);
if (perf_output_begin(&handle, &data, event,
header.size * (top - base - skip)))
goto unlock;
for (at = base; at < top; at++) {
/* Filter out any records that contain kernel addresses. */
if (event->attr.exclude_kernel &&
(kernel_ip(at->from) || kernel_ip(at->to)))
continue;
data.ip = at->from;
data.addr = at->to;
perf_output_sample(&handle, &header, &data, event);
}
perf_output_end(&handle);
/* There's new data available. */
event->hw.interrupts++;
event->pending_kill = POLL_IN;
unlock:
rcu_read_unlock();
return 1;
}
void intel_pmu_drain_pebs_buffer(void)
{
struct perf_sample_data data;
static_call(x86_pmu_drain_pebs)(NULL, &data);
}
/*
* PEBS
*/
struct event_constraint intel_core2_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x00c0, 0x1), /* INST_RETIRED.ANY */
INTEL_FLAGS_UEVENT_CONSTRAINT(0xfec1, 0x1), /* X87_OPS_RETIRED.ANY */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x00c5, 0x1), /* BR_INST_RETIRED.MISPRED */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x1fc7, 0x1), /* SIMD_INST_RETURED.ANY */
INTEL_FLAGS_EVENT_CONSTRAINT(0xcb, 0x1), /* MEM_LOAD_RETIRED.* */
/* INST_RETIRED.ANY_P, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108000c0, 0x01),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_atom_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x00c0, 0x1), /* INST_RETIRED.ANY */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x00c5, 0x1), /* MISPREDICTED_BRANCH_RETIRED */
INTEL_FLAGS_EVENT_CONSTRAINT(0xcb, 0x1), /* MEM_LOAD_RETIRED.* */
/* INST_RETIRED.ANY_P, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108000c0, 0x01),
/* Allow all events as PEBS with no flags */
INTEL_ALL_EVENT_CONSTRAINT(0, 0x1),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_slm_pebs_event_constraints[] = {
/* INST_RETIRED.ANY_P, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108000c0, 0x1),
/* Allow all events as PEBS with no flags */
INTEL_ALL_EVENT_CONSTRAINT(0, 0x1),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_glm_pebs_event_constraints[] = {
/* Allow all events as PEBS with no flags */
INTEL_ALL_EVENT_CONSTRAINT(0, 0x1),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_grt_pebs_event_constraints[] = {
/* Allow all events as PEBS with no flags */
INTEL_HYBRID_LAT_CONSTRAINT(0x5d0, 0x3),
INTEL_HYBRID_LAT_CONSTRAINT(0x6d0, 0x3f),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_cmt_pebs_event_constraints[] = {
/* Allow all events as PEBS with no flags */
INTEL_HYBRID_LAT_CONSTRAINT(0x5d0, 0x3),
INTEL_HYBRID_LAT_CONSTRAINT(0x6d0, 0xff),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_dkt_pebs_event_constraints[] = {
/* Allow all events as PEBS with no flags */
INTEL_HYBRID_LAT_CONSTRAINT(0x5d0, 0xff),
INTEL_HYBRID_LAT_CONSTRAINT(0x6d0, 0xff),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_nehalem_pebs_event_constraints[] = {
INTEL_PLD_CONSTRAINT(0x100b, 0xf), /* MEM_INST_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0x0f, 0xf), /* MEM_UNCORE_RETIRED.* */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x010c, 0xf), /* MEM_STORE_RETIRED.DTLB_MISS */
INTEL_FLAGS_EVENT_CONSTRAINT(0xc0, 0xf), /* INST_RETIRED.ANY */
INTEL_EVENT_CONSTRAINT(0xc2, 0xf), /* UOPS_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0xc4, 0xf), /* BR_INST_RETIRED.* */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x02c5, 0xf), /* BR_MISP_RETIRED.NEAR_CALL */
INTEL_FLAGS_EVENT_CONSTRAINT(0xc7, 0xf), /* SSEX_UOPS_RETIRED.* */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x20c8, 0xf), /* ITLB_MISS_RETIRED */
INTEL_FLAGS_EVENT_CONSTRAINT(0xcb, 0xf), /* MEM_LOAD_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0xf7, 0xf), /* FP_ASSIST.* */
/* INST_RETIRED.ANY_P, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108000c0, 0x0f),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_westmere_pebs_event_constraints[] = {
INTEL_PLD_CONSTRAINT(0x100b, 0xf), /* MEM_INST_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0x0f, 0xf), /* MEM_UNCORE_RETIRED.* */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x010c, 0xf), /* MEM_STORE_RETIRED.DTLB_MISS */
INTEL_FLAGS_EVENT_CONSTRAINT(0xc0, 0xf), /* INSTR_RETIRED.* */
INTEL_EVENT_CONSTRAINT(0xc2, 0xf), /* UOPS_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0xc4, 0xf), /* BR_INST_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0xc5, 0xf), /* BR_MISP_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0xc7, 0xf), /* SSEX_UOPS_RETIRED.* */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x20c8, 0xf), /* ITLB_MISS_RETIRED */
INTEL_FLAGS_EVENT_CONSTRAINT(0xcb, 0xf), /* MEM_LOAD_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0xf7, 0xf), /* FP_ASSIST.* */
/* INST_RETIRED.ANY_P, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108000c0, 0x0f),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_snb_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PRECDIST */
INTEL_PLD_CONSTRAINT(0x01cd, 0x8), /* MEM_TRANS_RETIRED.LAT_ABOVE_THR */
INTEL_PST_CONSTRAINT(0x02cd, 0x8), /* MEM_TRANS_RETIRED.PRECISE_STORES */
/* UOPS_RETIRED.ALL, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108001c2, 0xf),
INTEL_EXCLEVT_CONSTRAINT(0xd0, 0xf), /* MEM_UOP_RETIRED.* */
INTEL_EXCLEVT_CONSTRAINT(0xd1, 0xf), /* MEM_LOAD_UOPS_RETIRED.* */
INTEL_EXCLEVT_CONSTRAINT(0xd2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */
INTEL_EXCLEVT_CONSTRAINT(0xd3, 0xf), /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */
/* Allow all events as PEBS with no flags */
INTEL_ALL_EVENT_CONSTRAINT(0, 0xf),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_ivb_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PRECDIST */
INTEL_PLD_CONSTRAINT(0x01cd, 0x8), /* MEM_TRANS_RETIRED.LAT_ABOVE_THR */
INTEL_PST_CONSTRAINT(0x02cd, 0x8), /* MEM_TRANS_RETIRED.PRECISE_STORES */
/* UOPS_RETIRED.ALL, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108001c2, 0xf),
/* INST_RETIRED.PREC_DIST, inv=1, cmask=16 (cycles:ppp). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108001c0, 0x2),
INTEL_EXCLEVT_CONSTRAINT(0xd0, 0xf), /* MEM_UOP_RETIRED.* */
INTEL_EXCLEVT_CONSTRAINT(0xd1, 0xf), /* MEM_LOAD_UOPS_RETIRED.* */
INTEL_EXCLEVT_CONSTRAINT(0xd2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */
INTEL_EXCLEVT_CONSTRAINT(0xd3, 0xf), /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */
/* Allow all events as PEBS with no flags */
INTEL_ALL_EVENT_CONSTRAINT(0, 0xf),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_hsw_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PRECDIST */
INTEL_PLD_CONSTRAINT(0x01cd, 0xf), /* MEM_TRANS_RETIRED.* */
/* UOPS_RETIRED.ALL, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108001c2, 0xf),
/* INST_RETIRED.PREC_DIST, inv=1, cmask=16 (cycles:ppp). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108001c0, 0x2),
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_NA(0x01c2, 0xf), /* UOPS_RETIRED.ALL */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(0x11d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(0x21d0, 0xf), /* MEM_UOPS_RETIRED.LOCK_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(0x41d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(0x81d0, 0xf), /* MEM_UOPS_RETIRED.ALL_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(0x12d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(0x42d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(0x82d0, 0xf), /* MEM_UOPS_RETIRED.ALL_STORES */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(0xd1, 0xf), /* MEM_LOAD_UOPS_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(0xd2, 0xf), /* MEM_LOAD_UOPS_L3_HIT_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(0xd3, 0xf), /* MEM_LOAD_UOPS_L3_MISS_RETIRED.* */
/* Allow all events as PEBS with no flags */
INTEL_ALL_EVENT_CONSTRAINT(0, 0xf),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_bdw_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PRECDIST */
INTEL_PLD_CONSTRAINT(0x01cd, 0xf), /* MEM_TRANS_RETIRED.* */
/* UOPS_RETIRED.ALL, inv=1, cmask=16 (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108001c2, 0xf),
/* INST_RETIRED.PREC_DIST, inv=1, cmask=16 (cycles:ppp). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108001c0, 0x2),
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_NA(0x01c2, 0xf), /* UOPS_RETIRED.ALL */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_UOPS_RETIRED.LOCK_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x41d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x81d0, 0xf), /* MEM_UOPS_RETIRED.ALL_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x42d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x82d0, 0xf), /* MEM_UOPS_RETIRED.ALL_STORES */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd1, 0xf), /* MEM_LOAD_UOPS_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd2, 0xf), /* MEM_LOAD_UOPS_L3_HIT_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd3, 0xf), /* MEM_LOAD_UOPS_L3_MISS_RETIRED.* */
/* Allow all events as PEBS with no flags */
INTEL_ALL_EVENT_CONSTRAINT(0, 0xf),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_skl_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x1c0, 0x2), /* INST_RETIRED.PREC_DIST */
/* INST_RETIRED.PREC_DIST, inv=1, cmask=16 (cycles:ppp). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108001c0, 0x2),
/* INST_RETIRED.TOTAL_CYCLES_PS (inv=1, cmask=16) (cycles:p). */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x108000c0, 0x0f),
INTEL_PLD_CONSTRAINT(0x1cd, 0xf), /* MEM_TRANS_RETIRED.* */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_INST_RETIRED.LOCK_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x22d0, 0xf), /* MEM_INST_RETIRED.LOCK_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x41d0, 0xf), /* MEM_INST_RETIRED.SPLIT_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x42d0, 0xf), /* MEM_INST_RETIRED.SPLIT_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x81d0, 0xf), /* MEM_INST_RETIRED.ALL_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x82d0, 0xf), /* MEM_INST_RETIRED.ALL_STORES */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd1, 0xf), /* MEM_LOAD_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd2, 0xf), /* MEM_LOAD_L3_HIT_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd3, 0xf), /* MEM_LOAD_L3_MISS_RETIRED.* */
/* Allow all events as PEBS with no flags */
INTEL_ALL_EVENT_CONSTRAINT(0, 0xf),
EVENT_CONSTRAINT_END
};
struct event_constraint intel_icl_pebs_event_constraints[] = {
INTEL_PLD_CONSTRAINT(0x1cd, 0xff), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_INST_RETIRED.LOCK_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x41d0, 0xf), /* MEM_INST_RETIRED.SPLIT_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x42d0, 0xf), /* MEM_INST_RETIRED.SPLIT_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x81d0, 0xf), /* MEM_INST_RETIRED.ALL_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x82d0, 0xf), /* MEM_INST_RETIRED.ALL_STORES */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD_RANGE(0xd1, 0xd4, 0xf), /* MEM_LOAD_*_RETIRED.* */
INTEL_FLAGS_EVENT_CONSTRAINT(0xd0, 0xf), /* MEM_INST_RETIRED.* */
/*
* Everything else is handled by PMU_FL_PEBS_ALL, because we
* need the full constraints from the main table.
*/
EVENT_CONSTRAINT_END
};
struct event_constraint intel_glc_pebs_event_constraints[] = {
INTEL_FLAGS_EVENT_CONSTRAINT(0xc0, 0xfe),
INTEL_PLD_CONSTRAINT(0x1cd, 0xfe),
INTEL_PSD_CONSTRAINT(0x2cd, 0x1),
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_INST_RETIRED.LOCK_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x41d0, 0xf), /* MEM_INST_RETIRED.SPLIT_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x42d0, 0xf), /* MEM_INST_RETIRED.SPLIT_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x81d0, 0xf), /* MEM_INST_RETIRED.ALL_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x82d0, 0xf), /* MEM_INST_RETIRED.ALL_STORES */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD_RANGE(0xd1, 0xd4, 0xf),
INTEL_FLAGS_EVENT_CONSTRAINT(0xd0, 0xf),
/*
* Everything else is handled by PMU_FL_PEBS_ALL, because we
* need the full constraints from the main table.
*/
EVENT_CONSTRAINT_END
};
struct event_constraint intel_lnc_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x012a, 0x1), /* OCR.* events */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x012b, 0x1), /* OCR.* events */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x04a4, 0x1), /* TOPDOWN.BAD_SPEC_SLOTS */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x08a4, 0x1), /* TOPDOWN.BR_MISPREDICT_SLOTS */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x10a4, 0x8), /* TOPDOWN.MEMORY_BOUND_SLOTS */
INTEL_HYBRID_LDLAT_CONSTRAINT(0x1cd, 0x3fc),
INTEL_HYBRID_STLAT_CONSTRAINT(0x2cd, 0x3),
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_INST_RETIRED.LOCK_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x41d0, 0xf), /* MEM_INST_RETIRED.SPLIT_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x42d0, 0xf), /* MEM_INST_RETIRED.SPLIT_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x81d0, 0xf), /* MEM_INST_RETIRED.ALL_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x82d0, 0xf), /* MEM_INST_RETIRED.ALL_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x87d0, 0x3ff), /* MEM_INST_RETIRED.ANY */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD_RANGE(0xd1, 0xd4, 0xf),
INTEL_FLAGS_EVENT_CONSTRAINT(0xd0, 0xf),
/*
* Everything else is handled by PMU_FL_PEBS_ALL, because we
* need the full constraints from the main table.
*/
EVENT_CONSTRAINT_END
};
struct event_constraint intel_pnc_pebs_event_constraints[] = {
INTEL_HYBRID_LDLAT_CONSTRAINT(0x1cd, 0xfc),
INTEL_HYBRID_STLAT_CONSTRAINT(0x2cd, 0x3),
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_INST_RETIRED.LOCK_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x41d0, 0xf), /* MEM_INST_RETIRED.SPLIT_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x42d0, 0xf), /* MEM_INST_RETIRED.SPLIT_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x81d0, 0xf), /* MEM_INST_RETIRED.ALL_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x82d0, 0xf), /* MEM_INST_RETIRED.ALL_STORES */
INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD_RANGE(0xd1, 0xd4, 0xf),
INTEL_FLAGS_EVENT_CONSTRAINT(0xd0, 0xf),
INTEL_FLAGS_EVENT_CONSTRAINT(0xd6, 0xf),
/*
* Everything else is handled by PMU_FL_PEBS_ALL, because we
* need the full constraints from the main table.
*/
EVENT_CONSTRAINT_END
};
struct event_constraint *intel_pebs_constraints(struct perf_event *event)
{
struct event_constraint *pebs_constraints = hybrid(event->pmu, pebs_constraints);
struct event_constraint *c;
if (!event->attr.precise_ip)
return NULL;
if (pebs_constraints) {
for_each_event_constraint(c, pebs_constraints) {
if (constraint_match(c, event->hw.config)) {
event->hw.flags |= c->flags;
return c;
}
}
}
/*
* Extended PEBS support
* Makes the PEBS code search the normal constraints.
*/
if (x86_pmu.flags & PMU_FL_PEBS_ALL)
return NULL;
return &emptyconstraint;
}
/*
* We need the sched_task callback even for per-cpu events when we use
* the large interrupt threshold, such that we can provide PID and TID
* to PEBS samples.
*/
static inline bool pebs_needs_sched_cb(struct cpu_hw_events *cpuc)
{
if (cpuc->n_pebs == cpuc->n_pebs_via_pt)
return false;
return cpuc->n_pebs && (cpuc->n_pebs == cpuc->n_large_pebs);
}
void intel_pmu_pebs_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
if (!sched_in && pebs_needs_sched_cb(cpuc))
intel_pmu_drain_pebs_buffer();
}
static inline void pebs_update_threshold(struct cpu_hw_events *cpuc)
{
struct debug_store *ds = cpuc->ds;
int max_pebs_events = intel_pmu_max_num_pebs(cpuc->pmu);
u64 threshold;
int reserved;
if (cpuc->n_pebs_via_pt)
return;
if (x86_pmu.flags & PMU_FL_PEBS_ALL)
reserved = max_pebs_events + x86_pmu_max_num_counters_fixed(cpuc->pmu);
else
reserved = max_pebs_events;
if (cpuc->n_pebs == cpuc->n_large_pebs) {
threshold = ds->pebs_absolute_maximum -
reserved * cpuc->pebs_record_size;
} else {
threshold = ds->pebs_buffer_base + cpuc->pebs_record_size;
}
ds->pebs_interrupt_threshold = threshold;
}
#define PEBS_DATACFG_CNTRS(x) \
((x >> PEBS_DATACFG_CNTR_SHIFT) & PEBS_DATACFG_CNTR_MASK)
#define PEBS_DATACFG_CNTR_BIT(x) \
(((1ULL << x) & PEBS_DATACFG_CNTR_MASK) << PEBS_DATACFG_CNTR_SHIFT)
#define PEBS_DATACFG_FIX(x) \
((x >> PEBS_DATACFG_FIX_SHIFT) & PEBS_DATACFG_FIX_MASK)
#define PEBS_DATACFG_FIX_BIT(x) \
(((1ULL << (x)) & PEBS_DATACFG_FIX_MASK) \
<< PEBS_DATACFG_FIX_SHIFT)
static void adaptive_pebs_record_size_update(void)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
u64 pebs_data_cfg = cpuc->pebs_data_cfg;
int sz = sizeof(struct pebs_basic);
if (pebs_data_cfg & PEBS_DATACFG_MEMINFO)
sz += sizeof(struct pebs_meminfo);
if (pebs_data_cfg & PEBS_DATACFG_GP)
sz += sizeof(struct pebs_gprs);
if (pebs_data_cfg & PEBS_DATACFG_XMMS)
sz += sizeof(struct pebs_xmm);
if (pebs_data_cfg & PEBS_DATACFG_LBRS)
sz += x86_pmu.lbr_nr * sizeof(struct lbr_entry);
if (pebs_data_cfg & (PEBS_DATACFG_METRICS | PEBS_DATACFG_CNTR)) {
sz += sizeof(struct pebs_cntr_header);
/* Metrics base and Metrics Data */
if (pebs_data_cfg & PEBS_DATACFG_METRICS)
sz += 2 * sizeof(u64);
if (pebs_data_cfg & PEBS_DATACFG_CNTR) {
sz += (hweight64(PEBS_DATACFG_CNTRS(pebs_data_cfg)) +
hweight64(PEBS_DATACFG_FIX(pebs_data_cfg))) *
sizeof(u64);
}
}
cpuc->pebs_record_size = sz;
}
static void __intel_pmu_pebs_update_cfg(struct perf_event *event,
int idx, u64 *pebs_data_cfg)
{
if (is_metric_event(event)) {
*pebs_data_cfg |= PEBS_DATACFG_METRICS;
return;
}
*pebs_data_cfg |= PEBS_DATACFG_CNTR;
if (idx >= INTEL_PMC_IDX_FIXED)
*pebs_data_cfg |= PEBS_DATACFG_FIX_BIT(idx - INTEL_PMC_IDX_FIXED);
else
*pebs_data_cfg |= PEBS_DATACFG_CNTR_BIT(idx);
}
void intel_pmu_pebs_late_setup(struct cpu_hw_events *cpuc)
{
struct perf_event *event;
u64 pebs_data_cfg = 0;
int i;
for (i = 0; i < cpuc->n_events; i++) {
event = cpuc->event_list[i];
if (!is_pebs_counter_event_group(event))
continue;
__intel_pmu_pebs_update_cfg(event, cpuc->assign[i], &pebs_data_cfg);
}
if (pebs_data_cfg & ~cpuc->pebs_data_cfg)
cpuc->pebs_data_cfg |= pebs_data_cfg | PEBS_UPDATE_DS_SW;
}
#define PERF_PEBS_MEMINFO_TYPE (PERF_SAMPLE_ADDR | PERF_SAMPLE_DATA_SRC | \
PERF_SAMPLE_PHYS_ADDR | \
PERF_SAMPLE_WEIGHT_TYPE | \
PERF_SAMPLE_TRANSACTION | \
PERF_SAMPLE_DATA_PAGE_SIZE)
static u64 pebs_update_adaptive_cfg(struct perf_event *event)
{
struct perf_event_attr *attr = &event->attr;
u64 sample_type = attr->sample_type;
u64 pebs_data_cfg = 0;
bool gprs, tsx_weight;
if (!(sample_type & ~(PERF_SAMPLE_IP|PERF_SAMPLE_TIME)) &&
attr->precise_ip > 1)
return pebs_data_cfg;
if (sample_type & PERF_PEBS_MEMINFO_TYPE)
pebs_data_cfg |= PEBS_DATACFG_MEMINFO;
/*
* We need GPRs when:
* + user requested them
* + precise_ip < 2 for the non event IP
* + For RTM TSX weight we need GPRs for the abort code.
*/
gprs = ((sample_type & PERF_SAMPLE_REGS_INTR) &&
(attr->sample_regs_intr & PEBS_GP_REGS)) ||
((sample_type & PERF_SAMPLE_REGS_USER) &&
(attr->sample_regs_user & PEBS_GP_REGS));
tsx_weight = (sample_type & PERF_SAMPLE_WEIGHT_TYPE) &&
((attr->config & INTEL_ARCH_EVENT_MASK) ==
x86_pmu.rtm_abort_event);
if (gprs || (attr->precise_ip < 2) || tsx_weight)
pebs_data_cfg |= PEBS_DATACFG_GP;
if ((sample_type & PERF_SAMPLE_REGS_INTR) &&
(attr->sample_regs_intr & PERF_REG_EXTENDED_MASK))
pebs_data_cfg |= PEBS_DATACFG_XMMS;
if (sample_type & PERF_SAMPLE_BRANCH_STACK) {
/*
* For now always log all LBRs. Could configure this
* later.
*/
pebs_data_cfg |= PEBS_DATACFG_LBRS |
((x86_pmu.lbr_nr-1) << PEBS_DATACFG_LBR_SHIFT);
}
return pebs_data_cfg;
}
static void
pebs_update_state(bool needed_cb, struct cpu_hw_events *cpuc,
struct perf_event *event, bool add)
{
struct pmu *pmu = event->pmu;
/*
* Make sure we get updated with the first PEBS event.
* During removal, ->pebs_data_cfg is still valid for
* the last PEBS event. Don't clear it.
*/
if ((cpuc->n_pebs == 1) && add)
cpuc->pebs_data_cfg = PEBS_UPDATE_DS_SW;
if (needed_cb != pebs_needs_sched_cb(cpuc)) {
if (!needed_cb)
perf_sched_cb_inc(pmu);
else
perf_sched_cb_dec(pmu);
cpuc->pebs_data_cfg |= PEBS_UPDATE_DS_SW;
}
/*
* The PEBS record doesn't shrink on pmu::del(). Doing so would require
* iterating all remaining PEBS events to reconstruct the config.
*/
if (x86_pmu.intel_cap.pebs_baseline && add) {
u64 pebs_data_cfg;
pebs_data_cfg = pebs_update_adaptive_cfg(event);
/*
* Be sure to update the thresholds when we change the record.
*/
if (pebs_data_cfg & ~cpuc->pebs_data_cfg)
cpuc->pebs_data_cfg |= pebs_data_cfg | PEBS_UPDATE_DS_SW;
}
}
u64 intel_get_arch_pebs_data_config(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
u64 pebs_data_cfg = 0;
u64 cntr_mask;
if (WARN_ON(event->hw.idx < 0 || event->hw.idx >= X86_PMC_IDX_MAX))
return 0;
pebs_data_cfg |= pebs_update_adaptive_cfg(event);
cntr_mask = (PEBS_DATACFG_CNTR_MASK << PEBS_DATACFG_CNTR_SHIFT) |
(PEBS_DATACFG_FIX_MASK << PEBS_DATACFG_FIX_SHIFT) |
PEBS_DATACFG_CNTR | PEBS_DATACFG_METRICS;
pebs_data_cfg |= cpuc->pebs_data_cfg & cntr_mask;
return pebs_data_cfg;
}
void intel_pmu_pebs_add(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
bool needed_cb = pebs_needs_sched_cb(cpuc);
cpuc->n_pebs++;
if (hwc->flags & PERF_X86_EVENT_LARGE_PEBS)
cpuc->n_large_pebs++;
if (hwc->flags & PERF_X86_EVENT_PEBS_VIA_PT)
cpuc->n_pebs_via_pt++;
pebs_update_state(needed_cb, cpuc, event, true);
}
static void intel_pmu_pebs_via_pt_disable(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
if (!is_pebs_pt(event))
return;
if (!(cpuc->pebs_enabled & ~PEBS_VIA_PT_MASK))
cpuc->pebs_enabled &= ~PEBS_VIA_PT_MASK;
}
static void intel_pmu_pebs_via_pt_enable(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
struct debug_store *ds = cpuc->ds;
u64 value = ds->pebs_event_reset[hwc->idx];
u32 base = MSR_RELOAD_PMC0;
unsigned int idx = hwc->idx;
if (!is_pebs_pt(event))
return;
if (!(event->hw.flags & PERF_X86_EVENT_LARGE_PEBS))
cpuc->pebs_enabled |= PEBS_PMI_AFTER_EACH_RECORD;
cpuc->pebs_enabled |= PEBS_OUTPUT_PT;
if (hwc->idx >= INTEL_PMC_IDX_FIXED) {
base = MSR_RELOAD_FIXED_CTR0;
idx = hwc->idx - INTEL_PMC_IDX_FIXED;
if (x86_pmu.intel_cap.pebs_format < 5)
value = ds->pebs_event_reset[MAX_PEBS_EVENTS_FMT4 + idx];
else
value = ds->pebs_event_reset[MAX_PEBS_EVENTS + idx];
}
wrmsrq(base + idx, value);
}
static inline void intel_pmu_drain_large_pebs(struct cpu_hw_events *cpuc)
{
if (cpuc->n_pebs == cpuc->n_large_pebs &&
cpuc->n_pebs != cpuc->n_pebs_via_pt)
intel_pmu_drain_pebs_buffer();
}
static void __intel_pmu_pebs_enable(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
hwc->config &= ~ARCH_PERFMON_EVENTSEL_INT;
cpuc->pebs_enabled |= 1ULL << hwc->idx;
}
void intel_pmu_pebs_enable(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
u64 pebs_data_cfg = cpuc->pebs_data_cfg & ~PEBS_UPDATE_DS_SW;
struct hw_perf_event *hwc = &event->hw;
struct debug_store *ds = cpuc->ds;
unsigned int idx = hwc->idx;
__intel_pmu_pebs_enable(event);
if ((event->hw.flags & PERF_X86_EVENT_PEBS_LDLAT) && (x86_pmu.version < 5))
cpuc->pebs_enabled |= 1ULL << (hwc->idx + 32);
else if (event->hw.flags & PERF_X86_EVENT_PEBS_ST)
cpuc->pebs_enabled |= 1ULL << 63;
if (x86_pmu.intel_cap.pebs_baseline) {
hwc->config |= ICL_EVENTSEL_ADAPTIVE;
if (pebs_data_cfg != cpuc->active_pebs_data_cfg) {
/*
* drain_pebs() assumes uniform record size;
* hence we need to drain when changing said
* size.
*/
intel_pmu_drain_pebs_buffer();
adaptive_pebs_record_size_update();
wrmsrq(MSR_PEBS_DATA_CFG, pebs_data_cfg);
cpuc->active_pebs_data_cfg = pebs_data_cfg;
}
}
if (cpuc->pebs_data_cfg & PEBS_UPDATE_DS_SW) {
cpuc->pebs_data_cfg = pebs_data_cfg;
pebs_update_threshold(cpuc);
}
if (idx >= INTEL_PMC_IDX_FIXED) {
if (x86_pmu.intel_cap.pebs_format < 5)
idx = MAX_PEBS_EVENTS_FMT4 + (idx - INTEL_PMC_IDX_FIXED);
else
idx = MAX_PEBS_EVENTS + (idx - INTEL_PMC_IDX_FIXED);
}
/*
* Use auto-reload if possible to save a MSR write in the PMI.
* This must be done in pmu::start(), because PERF_EVENT_IOC_PERIOD.
*/
if (hwc->flags & PERF_X86_EVENT_AUTO_RELOAD) {
ds->pebs_event_reset[idx] =
(u64)(-hwc->sample_period) & x86_pmu.cntval_mask;
} else {
ds->pebs_event_reset[idx] = 0;
}
intel_pmu_pebs_via_pt_enable(event);
}
void intel_pmu_pebs_del(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
bool needed_cb = pebs_needs_sched_cb(cpuc);
cpuc->n_pebs--;
if (hwc->flags & PERF_X86_EVENT_LARGE_PEBS)
cpuc->n_large_pebs--;
if (hwc->flags & PERF_X86_EVENT_PEBS_VIA_PT)
cpuc->n_pebs_via_pt--;
pebs_update_state(needed_cb, cpuc, event, false);
}
static void __intel_pmu_pebs_disable(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
intel_pmu_drain_large_pebs(cpuc);
cpuc->pebs_enabled &= ~(1ULL << hwc->idx);
hwc->config |= ARCH_PERFMON_EVENTSEL_INT;
}
void intel_pmu_pebs_disable(struct perf_event *event)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
__intel_pmu_pebs_disable(event);
if ((event->hw.flags & PERF_X86_EVENT_PEBS_LDLAT) &&
(x86_pmu.version < 5))
cpuc->pebs_enabled &= ~(1ULL << (hwc->idx + 32));
else if (event->hw.flags & PERF_X86_EVENT_PEBS_ST)
cpuc->pebs_enabled &= ~(1ULL << 63);
intel_pmu_pebs_via_pt_disable(event);
if (cpuc->enabled)
wrmsrq(MSR_IA32_PEBS_ENABLE, cpuc->pebs_enabled);
}
void intel_pmu_pebs_enable_all(void)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
if (cpuc->pebs_enabled)
wrmsrq(MSR_IA32_PEBS_ENABLE, cpuc->pebs_enabled);
}
void intel_pmu_pebs_disable_all(void)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
if (cpuc->pebs_enabled)
__intel_pmu_pebs_disable_all();
}
static int intel_pmu_pebs_fixup_ip(struct pt_regs *regs)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
unsigned long from = cpuc->lbr_entries[0].from;
unsigned long old_to, to = cpuc->lbr_entries[0].to;
unsigned long ip = regs->ip;
int is_64bit = 0;
void *kaddr;
int size;
/*
* We don't need to fixup if the PEBS assist is fault like
*/
if (!x86_pmu.intel_cap.pebs_trap)
return 1;
/*
* No LBR entry, no basic block, no rewinding
*/
if (!cpuc->lbr_stack.nr || !from || !to)
return 0;
/*
* Basic blocks should never cross user/kernel boundaries
*/
if (kernel_ip(ip) != kernel_ip(to))
return 0;
/*
* unsigned math, either ip is before the start (impossible) or
* the basic block is larger than 1 page (sanity)
*/
if ((ip - to) > PEBS_FIXUP_SIZE)
return 0;
/*
* We sampled a branch insn, rewind using the LBR stack
*/
if (ip == to) {
set_linear_ip(regs, from);
return 1;
}
size = ip - to;
if (!kernel_ip(ip)) {
int bytes;
u8 *buf = this_cpu_read(insn_buffer);
/* 'size' must fit our buffer, see above */
bytes = copy_from_user_nmi(buf, (void __user *)to, size);
if (bytes != 0)
return 0;
kaddr = buf;
} else {
kaddr = (void *)to;
}
do {
struct insn insn;
old_to = to;
#ifdef CONFIG_X86_64
is_64bit = kernel_ip(to) || any_64bit_mode(regs);
#endif
insn_init(&insn, kaddr, size, is_64bit);
/*
* Make sure there was not a problem decoding the instruction.
* This is doubly important because we have an infinite loop if
* insn.length=0.
*/
if (insn_get_length(&insn))
break;
to += insn.length;
kaddr += insn.length;
size -= insn.length;
} while (to < ip);
if (to == ip) {
set_linear_ip(regs, old_to);
return 1;
}
/*
* Even though we decoded the basic block, the instruction stream
* never matched the given IP, either the TO or the IP got corrupted.
*/
return 0;
}
static inline u64 intel_get_tsx_weight(u64 tsx_tuning)
{
if (tsx_tuning) {
union hsw_tsx_tuning tsx = { .value = tsx_tuning };
return tsx.cycles_last_block;
}
return 0;
}
static inline u64 intel_get_tsx_transaction(u64 tsx_tuning, u64 ax)
{
u64 txn = (tsx_tuning & PEBS_HSW_TSX_FLAGS) >> 32;
/* For RTM XABORTs also log the abort code from AX */
if ((txn & PERF_TXN_TRANSACTION) && (ax & 1))
txn |= ((ax >> 24) & 0xff) << PERF_TXN_ABORT_SHIFT;
return txn;
}
static inline u64 get_pebs_status(void *n)
{
if (x86_pmu.intel_cap.pebs_format < 4)
return ((struct pebs_record_nhm *)n)->status;
return ((struct pebs_basic *)n)->applicable_counters;
}
#define PERF_X86_EVENT_PEBS_HSW_PREC \
(PERF_X86_EVENT_PEBS_ST_HSW | \
PERF_X86_EVENT_PEBS_LD_HSW | \
PERF_X86_EVENT_PEBS_NA_HSW)
static u64 get_data_src(struct perf_event *event, u64 aux)
{
u64 val = PERF_MEM_NA;
int fl = event->hw.flags;
bool fst = fl & (PERF_X86_EVENT_PEBS_ST | PERF_X86_EVENT_PEBS_HSW_PREC);
if (fl & PERF_X86_EVENT_PEBS_LDLAT)
val = load_latency_data(event, aux);
else if (fl & PERF_X86_EVENT_PEBS_STLAT)
val = store_latency_data(event, aux);
else if (fl & PERF_X86_EVENT_PEBS_LAT_HYBRID)
val = x86_pmu.pebs_latency_data(event, aux);
else if (fst && (fl & PERF_X86_EVENT_PEBS_HSW_PREC))
val = precise_datala_hsw(event, aux);
else if (fst)
val = precise_store_data(aux);
return val;
}
static void setup_pebs_time(struct perf_event *event,
struct perf_sample_data *data,
u64 tsc)
{
/* Converting to a user-defined clock is not supported yet. */
if (event->attr.use_clockid != 0)
return;
/*
* Doesn't support the conversion when the TSC is unstable.
* The TSC unstable case is a corner case and very unlikely to
* happen. If it happens, the TSC in a PEBS record will be
* dropped and fall back to perf_event_clock().
*/
if (!using_native_sched_clock() || !sched_clock_stable())
return;
data->time = native_sched_clock_from_tsc(tsc) + __sched_clock_offset;
data->sample_flags |= PERF_SAMPLE_TIME;
}
#define PERF_SAMPLE_ADDR_TYPE (PERF_SAMPLE_ADDR | \
PERF_SAMPLE_PHYS_ADDR | \
PERF_SAMPLE_DATA_PAGE_SIZE)
static void setup_pebs_fixed_sample_data(struct perf_event *event,
struct pt_regs *iregs, void *__pebs,
struct perf_sample_data *data,
struct pt_regs *regs)
{
/*
* We cast to the biggest pebs_record but are careful not to
* unconditionally access the 'extra' entries.
*/
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct pebs_record_skl *pebs = __pebs;
u64 sample_type;
int fll;
if (pebs == NULL)
return;
sample_type = event->attr.sample_type;
fll = event->hw.flags & PERF_X86_EVENT_PEBS_LDLAT;
perf_sample_data_init(data, 0, event->hw.last_period);
/*
* Use latency for weight (only avail with PEBS-LL)
*/
if (fll && (sample_type & PERF_SAMPLE_WEIGHT_TYPE)) {
data->weight.full = pebs->lat;
data->sample_flags |= PERF_SAMPLE_WEIGHT_TYPE;
}
/*
* data.data_src encodes the data source
*/
if (sample_type & PERF_SAMPLE_DATA_SRC) {
data->data_src.val = get_data_src(event, pebs->dse);
data->sample_flags |= PERF_SAMPLE_DATA_SRC;
}
/*
* We must however always use iregs for the unwinder to stay sane; the
* record BP,SP,IP can point into thin air when the record is from a
* previous PMI context or an (I)RET happened between the record and
* PMI.
*/
perf_sample_save_callchain(data, event, iregs);
/*
* We use the interrupt regs as a base because the PEBS record does not
* contain a full regs set, specifically it seems to lack segment
* descriptors, which get used by things like user_mode().
*
* In the simple case fix up only the IP for PERF_SAMPLE_IP.
*/
*regs = *iregs;
/*
* Initialize regs_>flags from PEBS,
* Clear exact bit (which uses x86 EFLAGS Reserved bit 3),
* i.e., do not rely on it being zero:
*/
regs->flags = pebs->flags & ~PERF_EFLAGS_EXACT;
if (sample_type & PERF_SAMPLE_REGS_INTR) {
regs->ax = pebs->ax;
regs->bx = pebs->bx;
regs->cx = pebs->cx;
regs->dx = pebs->dx;
regs->si = pebs->si;
regs->di = pebs->di;
regs->bp = pebs->bp;
regs->sp = pebs->sp;
#ifndef CONFIG_X86_32
regs->r8 = pebs->r8;
regs->r9 = pebs->r9;
regs->r10 = pebs->r10;
regs->r11 = pebs->r11;
regs->r12 = pebs->r12;
regs->r13 = pebs->r13;
regs->r14 = pebs->r14;
regs->r15 = pebs->r15;
#endif
}
if (event->attr.precise_ip > 1) {
/*
* Haswell and later processors have an 'eventing IP'
* (real IP) which fixes the off-by-1 skid in hardware.
* Use it when precise_ip >= 2 :
*/
if (x86_pmu.intel_cap.pebs_format >= 2) {
set_linear_ip(regs, pebs->real_ip);
regs->flags |= PERF_EFLAGS_EXACT;
} else {
/* Otherwise, use PEBS off-by-1 IP: */
set_linear_ip(regs, pebs->ip);
/*
* With precise_ip >= 2, try to fix up the off-by-1 IP
* using the LBR. If successful, the fixup function
* corrects regs->ip and calls set_linear_ip() on regs:
*/
if (intel_pmu_pebs_fixup_ip(regs))
regs->flags |= PERF_EFLAGS_EXACT;
}
} else {
/*
* When precise_ip == 1, return the PEBS off-by-1 IP,
* no fixup attempted:
*/
set_linear_ip(regs, pebs->ip);
}
if ((sample_type & PERF_SAMPLE_ADDR_TYPE) &&
x86_pmu.intel_cap.pebs_format >= 1) {
data->addr = pebs->dla;
data->sample_flags |= PERF_SAMPLE_ADDR;
}
if (x86_pmu.intel_cap.pebs_format >= 2) {
/* Only set the TSX weight when no memory weight. */
if ((sample_type & PERF_SAMPLE_WEIGHT_TYPE) && !fll) {
data->weight.full = intel_get_tsx_weight(pebs->tsx_tuning);
data->sample_flags |= PERF_SAMPLE_WEIGHT_TYPE;
}
if (sample_type & PERF_SAMPLE_TRANSACTION) {
data->txn = intel_get_tsx_transaction(pebs->tsx_tuning,
pebs->ax);
data->sample_flags |= PERF_SAMPLE_TRANSACTION;
}
}
/*
* v3 supplies an accurate time stamp, so we use that
* for the time stamp.
*
* We can only do this for the default trace clock.
*/
if (x86_pmu.intel_cap.pebs_format >= 3)
setup_pebs_time(event, data, pebs->tsc);
perf_sample_save_brstack(data, event, &cpuc->lbr_stack, NULL);
}
static void adaptive_pebs_save_regs(struct pt_regs *regs,
struct pebs_gprs *gprs)
{
regs->ax = gprs->ax;
regs->bx = gprs->bx;
regs->cx = gprs->cx;
regs->dx = gprs->dx;
regs->si = gprs->si;
regs->di = gprs->di;
regs->bp = gprs->bp;
regs->sp = gprs->sp;
#ifndef CONFIG_X86_32
regs->r8 = gprs->r8;
regs->r9 = gprs->r9;
regs->r10 = gprs->r10;
regs->r11 = gprs->r11;
regs->r12 = gprs->r12;
regs->r13 = gprs->r13;
regs->r14 = gprs->r14;
regs->r15 = gprs->r15;
#endif
}
static void intel_perf_event_update_pmc(struct perf_event *event, u64 pmc)
{
int shift = 64 - x86_pmu.cntval_bits;
struct hw_perf_event *hwc;
u64 delta, prev_pmc;
/*
* A recorded counter may not have an assigned event in the
* following cases. The value should be dropped.
* - An event is deleted. There is still an active PEBS event.
* The PEBS record doesn't shrink on pmu::del().
* If the counter of the deleted event once occurred in a PEBS
* record, PEBS still records the counter until the counter is
* reassigned.
* - An event is stopped for some reason, e.g., throttled.
* During this period, another event is added and takes the
* counter of the stopped event. The stopped event is assigned
* to another new and uninitialized counter, since the
* x86_pmu_start(RELOAD) is not invoked for a stopped event.
* The PEBS__DATA_CFG is updated regardless of the event state.
* The uninitialized counter can be recorded in a PEBS record.
* But the cpuc->events[uninitialized_counter] is always NULL,
* because the event is stopped. The uninitialized value is
* safely dropped.
*/
if (!event)
return;
hwc = &event->hw;
prev_pmc = local64_read(&hwc->prev_count);
/* Only update the count when the PMU is disabled */
WARN_ON(this_cpu_read(cpu_hw_events.enabled));
local64_set(&hwc->prev_count, pmc);
delta = (pmc << shift) - (prev_pmc << shift);
delta >>= shift;
local64_add(delta, &event->count);
local64_sub(delta, &hwc->period_left);
}
static inline void __setup_pebs_counter_group(struct cpu_hw_events *cpuc,
struct perf_event *event,
struct pebs_cntr_header *cntr,
void *next_record)
{
int bit;
for_each_set_bit(bit, (unsigned long *)&cntr->cntr, INTEL_PMC_MAX_GENERIC) {
intel_perf_event_update_pmc(cpuc->events[bit], *(u64 *)next_record);
next_record += sizeof(u64);
}
for_each_set_bit(bit, (unsigned long *)&cntr->fixed, INTEL_PMC_MAX_FIXED) {
/* The slots event will be handled with perf_metric later */
if ((cntr->metrics == INTEL_CNTR_METRICS) &&
(bit + INTEL_PMC_IDX_FIXED == INTEL_PMC_IDX_FIXED_SLOTS)) {
next_record += sizeof(u64);
continue;
}
intel_perf_event_update_pmc(cpuc->events[bit + INTEL_PMC_IDX_FIXED],
*(u64 *)next_record);
next_record += sizeof(u64);
}
/* HW will reload the value right after the overflow. */
if (event->hw.flags & PERF_X86_EVENT_AUTO_RELOAD)
local64_set(&event->hw.prev_count, (u64)-event->hw.sample_period);
if (cntr->metrics == INTEL_CNTR_METRICS) {
static_call(intel_pmu_update_topdown_event)
(cpuc->events[INTEL_PMC_IDX_FIXED_SLOTS],
(u64 *)next_record);
next_record += 2 * sizeof(u64);
}
}
#define PEBS_LATENCY_MASK 0xffff
static inline void __setup_perf_sample_data(struct perf_event *event,
struct pt_regs *iregs,
struct perf_sample_data *data)
{
perf_sample_data_init(data, 0, event->hw.last_period);
/*
* We must however always use iregs for the unwinder to stay sane; the
* record BP,SP,IP can point into thin air when the record is from a
* previous PMI context or an (I)RET happened between the record and
* PMI.
*/
perf_sample_save_callchain(data, event, iregs);
}
static inline void __setup_pebs_basic_group(struct perf_event *event,
struct pt_regs *regs,
struct perf_sample_data *data,
u64 sample_type, u64 ip,
u64 tsc, u16 retire)
{
/* The ip in basic is EventingIP */
set_linear_ip(regs, ip);
regs->flags = PERF_EFLAGS_EXACT;
setup_pebs_time(event, data, tsc);
if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT)
data->weight.var3_w = retire;
}
static inline void __setup_pebs_gpr_group(struct perf_event *event,
struct pt_regs *regs,
struct pebs_gprs *gprs,
u64 sample_type)
{
if (event->attr.precise_ip < 2) {
set_linear_ip(regs, gprs->ip);
regs->flags &= ~PERF_EFLAGS_EXACT;
}
if (sample_type & (PERF_SAMPLE_REGS_INTR | PERF_SAMPLE_REGS_USER))
adaptive_pebs_save_regs(regs, gprs);
}
static inline void __setup_pebs_meminfo_group(struct perf_event *event,
struct perf_sample_data *data,
u64 sample_type, u64 latency,
u16 instr_latency, u64 address,
u64 aux, u64 tsx_tuning, u64 ax)
{
if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
u64 tsx_latency = intel_get_tsx_weight(tsx_tuning);
data->weight.var2_w = instr_latency;
/*
* Although meminfo::latency is defined as a u64,
* only the lower 32 bits include the valid data
* in practice on Ice Lake and earlier platforms.
*/
if (sample_type & PERF_SAMPLE_WEIGHT)
data->weight.full = latency ?: tsx_latency;
else
data->weight.var1_dw = (u32)latency ?: tsx_latency;
data->sample_flags |= PERF_SAMPLE_WEIGHT_TYPE;
}
if (sample_type & PERF_SAMPLE_DATA_SRC) {
data->data_src.val = get_data_src(event, aux);
data->sample_flags |= PERF_SAMPLE_DATA_SRC;
}
if (sample_type & PERF_SAMPLE_ADDR_TYPE) {
data->addr = address;
data->sample_flags |= PERF_SAMPLE_ADDR;
}
if (sample_type & PERF_SAMPLE_TRANSACTION) {
data->txn = intel_get_tsx_transaction(tsx_tuning, ax);
data->sample_flags |= PERF_SAMPLE_TRANSACTION;
}
}
/*
* With adaptive PEBS the layout depends on what fields are configured.
*/
static void setup_pebs_adaptive_sample_data(struct perf_event *event,
struct pt_regs *iregs, void *__pebs,
struct perf_sample_data *data,
struct pt_regs *regs)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
u64 sample_type = event->attr.sample_type;
struct pebs_basic *basic = __pebs;
void *next_record = basic + 1;
struct pebs_meminfo *meminfo = NULL;
struct pebs_gprs *gprs = NULL;
struct x86_perf_regs *perf_regs;
u64 format_group;
u16 retire;
if (basic == NULL)
return;
perf_regs = container_of(regs, struct x86_perf_regs, regs);
perf_regs->xmm_regs = NULL;
format_group = basic->format_group;
__setup_perf_sample_data(event, iregs, data);
*regs = *iregs;
/* basic group */
retire = x86_pmu.flags & PMU_FL_RETIRE_LATENCY ?
basic->retire_latency : 0;
__setup_pebs_basic_group(event, regs, data, sample_type,
basic->ip, basic->tsc, retire);
/*
* The record for MEMINFO is in front of GP
* But PERF_SAMPLE_TRANSACTION needs gprs->ax.
* Save the pointer here but process later.
*/
if (format_group & PEBS_DATACFG_MEMINFO) {
meminfo = next_record;
next_record = meminfo + 1;
}
if (format_group & PEBS_DATACFG_GP) {
gprs = next_record;
next_record = gprs + 1;
__setup_pebs_gpr_group(event, regs, gprs, sample_type);
}
if (format_group & PEBS_DATACFG_MEMINFO) {
u64 latency = x86_pmu.flags & PMU_FL_INSTR_LATENCY ?
meminfo->cache_latency : meminfo->mem_latency;
u64 instr_latency = x86_pmu.flags & PMU_FL_INSTR_LATENCY ?
meminfo->instr_latency : 0;
u64 ax = gprs ? gprs->ax : 0;
__setup_pebs_meminfo_group(event, data, sample_type, latency,
instr_latency, meminfo->address,
meminfo->aux, meminfo->tsx_tuning,
ax);
}
if (format_group & PEBS_DATACFG_XMMS) {
struct pebs_xmm *xmm = next_record;
next_record = xmm + 1;
perf_regs->xmm_regs = xmm->xmm;
}
if (format_group & PEBS_DATACFG_LBRS) {
struct lbr_entry *lbr = next_record;
int num_lbr = ((format_group >> PEBS_DATACFG_LBR_SHIFT)
& 0xff) + 1;
next_record = next_record + num_lbr * sizeof(struct lbr_entry);
if (has_branch_stack(event)) {
intel_pmu_store_pebs_lbrs(lbr);
intel_pmu_lbr_save_brstack(data, cpuc, event);
}
}
if (format_group & (PEBS_DATACFG_CNTR | PEBS_DATACFG_METRICS)) {
struct pebs_cntr_header *cntr = next_record;
unsigned int nr;
next_record += sizeof(struct pebs_cntr_header);
/*
* The PEBS_DATA_CFG is a global register, which is the
* superset configuration for all PEBS events.
* For the PEBS record of non-sample-read group, ignore
* the counter snapshot fields.
*/
if (is_pebs_counter_event_group(event)) {
__setup_pebs_counter_group(cpuc, event, cntr, next_record);
data->sample_flags |= PERF_SAMPLE_READ;
}
nr = hweight32(cntr->cntr) + hweight32(cntr->fixed);
if (cntr->metrics == INTEL_CNTR_METRICS)
nr += 2;
next_record += nr * sizeof(u64);
}
WARN_ONCE(next_record != __pebs + basic->format_size,
"PEBS record size %u, expected %llu, config %llx\n",
basic->format_size,
(u64)(next_record - __pebs),
format_group);
}
static inline bool arch_pebs_record_continued(struct arch_pebs_header *header)
{
/* Continue bit or null PEBS record indicates fragment follows. */
return header->cont || !(header->format & GENMASK_ULL(63, 16));
}
static void setup_arch_pebs_sample_data(struct perf_event *event,
struct pt_regs *iregs,
void *__pebs,
struct perf_sample_data *data,
struct pt_regs *regs)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
u64 sample_type = event->attr.sample_type;
struct arch_pebs_header *header = NULL;
struct arch_pebs_aux *meminfo = NULL;
struct arch_pebs_gprs *gprs = NULL;
struct x86_perf_regs *perf_regs;
void *next_record;
void *at = __pebs;
if (at == NULL)
return;
perf_regs = container_of(regs, struct x86_perf_regs, regs);
perf_regs->xmm_regs = NULL;
__setup_perf_sample_data(event, iregs, data);
*regs = *iregs;
again:
header = at;
next_record = at + sizeof(struct arch_pebs_header);
if (header->basic) {
struct arch_pebs_basic *basic = next_record;
u16 retire = 0;
next_record = basic + 1;
if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT)
retire = basic->valid ? basic->retire : 0;
__setup_pebs_basic_group(event, regs, data, sample_type,
basic->ip, basic->tsc, retire);
}
/*
* The record for MEMINFO is in front of GP
* But PERF_SAMPLE_TRANSACTION needs gprs->ax.
* Save the pointer here but process later.
*/
if (header->aux) {
meminfo = next_record;
next_record = meminfo + 1;
}
if (header->gpr) {
gprs = next_record;
next_record = gprs + 1;
__setup_pebs_gpr_group(event, regs,
(struct pebs_gprs *)gprs,
sample_type);
}
if (header->aux) {
u64 ax = gprs ? gprs->ax : 0;
__setup_pebs_meminfo_group(event, data, sample_type,
meminfo->cache_latency,
meminfo->instr_latency,
meminfo->address, meminfo->aux,
meminfo->tsx_tuning, ax);
}
if (header->xmm) {
struct pebs_xmm *xmm;
next_record += sizeof(struct arch_pebs_xer_header);
xmm = next_record;
perf_regs->xmm_regs = xmm->xmm;
next_record = xmm + 1;
}
if (header->lbr) {
struct arch_pebs_lbr_header *lbr_header = next_record;
struct lbr_entry *lbr;
int num_lbr;
next_record = lbr_header + 1;
lbr = next_record;
num_lbr = header->lbr == ARCH_PEBS_LBR_NUM_VAR ?
lbr_header->depth :
header->lbr * ARCH_PEBS_BASE_LBR_ENTRIES;
next_record += num_lbr * sizeof(struct lbr_entry);
if (has_branch_stack(event)) {
intel_pmu_store_pebs_lbrs(lbr);
intel_pmu_lbr_save_brstack(data, cpuc, event);
}
}
if (header->cntr) {
struct arch_pebs_cntr_header *cntr = next_record;
unsigned int nr;
next_record += sizeof(struct arch_pebs_cntr_header);
if (is_pebs_counter_event_group(event)) {
__setup_pebs_counter_group(cpuc, event,
(struct pebs_cntr_header *)cntr, next_record);
data->sample_flags |= PERF_SAMPLE_READ;
}
nr = hweight32(cntr->cntr) + hweight32(cntr->fixed);
if (cntr->metrics == INTEL_CNTR_METRICS)
nr += 2;
next_record += nr * sizeof(u64);
}
/* Parse followed fragments if there are. */
if (arch_pebs_record_continued(header)) {
at = at + header->size;
goto again;
}
}
static inline void *
get_next_pebs_record_by_bit(void *base, void *top, int bit)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
void *at;
u64 pebs_status;
/*
* fmt0 does not have a status bitfield (does not use
* perf_record_nhm format)
*/
if (x86_pmu.intel_cap.pebs_format < 1)
return base;
if (base == NULL)
return NULL;
for (at = base; at < top; at += cpuc->pebs_record_size) {
unsigned long status = get_pebs_status(at);
if (test_bit(bit, (unsigned long *)&status)) {
/* PEBS v3 has accurate status bits */
if (x86_pmu.intel_cap.pebs_format >= 3)
return at;
if (status == (1 << bit))
return at;
/* clear non-PEBS bit and re-check */
pebs_status = status & cpuc->pebs_enabled;
pebs_status &= PEBS_COUNTER_MASK;
if (pebs_status == (1 << bit))
return at;
}
}
return NULL;
}
/*
* Special variant of intel_pmu_save_and_restart() for auto-reload.
*/
static int
intel_pmu_save_and_restart_reload(struct perf_event *event, int count)
{
struct hw_perf_event *hwc = &event->hw;
int shift = 64 - x86_pmu.cntval_bits;
u64 period = hwc->sample_period;
u64 prev_raw_count, new_raw_count;
s64 new, old;
WARN_ON(!period);
/*
* drain_pebs() only happens when the PMU is disabled.
*/
WARN_ON(this_cpu_read(cpu_hw_events.enabled));
prev_raw_count = local64_read(&hwc->prev_count);
new_raw_count = rdpmc(hwc->event_base_rdpmc);
local64_set(&hwc->prev_count, new_raw_count);
/*
* Since the counter increments a negative counter value and
* overflows on the sign switch, giving the interval:
*
* [-period, 0]
*
* the difference between two consecutive reads is:
*
* A) value2 - value1;
* when no overflows have happened in between,
*
* B) (0 - value1) + (value2 - (-period));
* when one overflow happened in between,
*
* C) (0 - value1) + (n - 1) * (period) + (value2 - (-period));
* when @n overflows happened in between.
*
* Here A) is the obvious difference, B) is the extension to the
* discrete interval, where the first term is to the top of the
* interval and the second term is from the bottom of the next
* interval and C) the extension to multiple intervals, where the
* middle term is the whole intervals covered.
*
* An equivalent of C, by reduction, is:
*
* value2 - value1 + n * period
*/
new = ((s64)(new_raw_count << shift) >> shift);
old = ((s64)(prev_raw_count << shift) >> shift);
local64_add(new - old + count * period, &event->count);
local64_set(&hwc->period_left, -new);
perf_event_update_userpage(event);
return 0;
}
typedef void (*setup_fn)(struct perf_event *, struct pt_regs *, void *,
struct perf_sample_data *, struct pt_regs *);
static struct pt_regs dummy_iregs;
static __always_inline void
__intel_pmu_pebs_event(struct perf_event *event,
struct pt_regs *iregs,
struct pt_regs *regs,
struct perf_sample_data *data,
void *at,
setup_fn setup_sample)
{
setup_sample(event, iregs, at, data, regs);
perf_event_output(event, data, regs);
}
static __always_inline void
__intel_pmu_pebs_last_event(struct perf_event *event,
struct pt_regs *iregs,
struct pt_regs *regs,
struct perf_sample_data *data,
void *at,
int count,
setup_fn setup_sample)
{
struct hw_perf_event *hwc = &event->hw;
setup_sample(event, iregs, at, data, regs);
if (iregs == &dummy_iregs) {
/*
* The PEBS records may be drained in the non-overflow context,
* e.g., large PEBS + context switch. Perf should treat the
* last record the same as other PEBS records, and doesn't
* invoke the generic overflow handler.
*/
perf_event_output(event, data, regs);
} else {
/*
* All but the last records are processed.
* The last one is left to be able to call the overflow handler.
*/
perf_event_overflow(event, data, regs);
}
if (hwc->flags & PERF_X86_EVENT_AUTO_RELOAD) {
if ((is_pebs_counter_event_group(event))) {
/*
* The value of each sample has been updated when setup
* the corresponding sample data.
*/
perf_event_update_userpage(event);
} else {
/*
* Now, auto-reload is only enabled in fixed period mode.
* The reload value is always hwc->sample_period.
* May need to change it, if auto-reload is enabled in
* freq mode later.
*/
intel_pmu_save_and_restart_reload(event, count);
}
} else {
/*
* For a non-precise event, it's possible the
* counters-snapshotting records a positive value for the
* overflowed event. Then the HW auto-reload mechanism
* reset the counter to 0 immediately, because the
* pebs_event_reset is cleared if the PERF_X86_EVENT_AUTO_RELOAD
* is not set. The counter backwards may be observed in a
* PMI handler.
*
* Since the event value has been updated when processing the
* counters-snapshotting record, only needs to set the new
* period for the counter.
*/
if (is_pebs_counter_event_group(event))
static_call(x86_pmu_set_period)(event);
else
intel_pmu_save_and_restart(event);
}
}
static __always_inline void
__intel_pmu_pebs_events(struct perf_event *event,
struct pt_regs *iregs,
struct perf_sample_data *data,
void *base, void *top,
int bit, int count,
setup_fn setup_sample)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct x86_perf_regs perf_regs;
struct pt_regs *regs = &perf_regs.regs;
void *at = get_next_pebs_record_by_bit(base, top, bit);
int cnt = count;
if (!iregs)
iregs = &dummy_iregs;
while (cnt > 1) {
__intel_pmu_pebs_event(event, iregs, regs, data, at, setup_sample);
at += cpuc->pebs_record_size;
at = get_next_pebs_record_by_bit(at, top, bit);
cnt--;
}
__intel_pmu_pebs_last_event(event, iregs, regs, data, at, count, setup_sample);
}
static void intel_pmu_drain_pebs_core(struct pt_regs *iregs, struct perf_sample_data *data)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct debug_store *ds = cpuc->ds;
struct perf_event *event = cpuc->events[0]; /* PMC0 only */
struct pebs_record_core *at, *top;
int n;
if (!x86_pmu.pebs_active)
return;
at = (struct pebs_record_core *)(unsigned long)ds->pebs_buffer_base;
top = (struct pebs_record_core *)(unsigned long)ds->pebs_index;
/*
* Whatever else happens, drain the thing
*/
ds->pebs_index = ds->pebs_buffer_base;
if (!test_bit(0, cpuc->active_mask))
return;
WARN_ON_ONCE(!event);
if (!event->attr.precise_ip)
return;
n = top - at;
if (n <= 0) {
if (event->hw.flags & PERF_X86_EVENT_AUTO_RELOAD)
intel_pmu_save_and_restart_reload(event, 0);
return;
}
__intel_pmu_pebs_events(event, iregs, data, at, top, 0, n,
setup_pebs_fixed_sample_data);
}
static void intel_pmu_pebs_event_update_no_drain(struct cpu_hw_events *cpuc, u64 mask)
{
u64 pebs_enabled = cpuc->pebs_enabled & mask;
struct perf_event *event;
int bit;
/*
* The drain_pebs() could be called twice in a short period
* for auto-reload event in pmu::read(). There are no
* overflows have happened in between.
* It needs to call intel_pmu_save_and_restart_reload() to
* update the event->count for this case.
*/
for_each_set_bit(bit, (unsigned long *)&pebs_enabled, X86_PMC_IDX_MAX) {
event = cpuc->events[bit];
if (event->hw.flags & PERF_X86_EVENT_AUTO_RELOAD)
intel_pmu_save_and_restart_reload(event, 0);
}
}
static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs, struct perf_sample_data *data)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct debug_store *ds = cpuc->ds;
struct perf_event *event;
void *base, *at, *top;
short counts[INTEL_PMC_IDX_FIXED + MAX_FIXED_PEBS_EVENTS] = {};
short error[INTEL_PMC_IDX_FIXED + MAX_FIXED_PEBS_EVENTS] = {};
int max_pebs_events = intel_pmu_max_num_pebs(NULL);
int bit, i, size;
u64 mask;
if (!x86_pmu.pebs_active)
return;
base = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
ds->pebs_index = ds->pebs_buffer_base;
mask = x86_pmu.pebs_events_mask;
size = max_pebs_events;
if (x86_pmu.flags & PMU_FL_PEBS_ALL) {
mask |= x86_pmu.fixed_cntr_mask64 << INTEL_PMC_IDX_FIXED;
size = INTEL_PMC_IDX_FIXED + x86_pmu_max_num_counters_fixed(NULL);
}
if (unlikely(base >= top)) {
intel_pmu_pebs_event_update_no_drain(cpuc, mask);
return;
}
for (at = base; at < top; at += x86_pmu.pebs_record_size) {
struct pebs_record_nhm *p = at;
u64 pebs_status;
pebs_status = p->status & cpuc->pebs_enabled;
pebs_status &= mask;
/* PEBS v3 has more accurate status bits */
if (x86_pmu.intel_cap.pebs_format >= 3) {
for_each_set_bit(bit, (unsigned long *)&pebs_status, size)
counts[bit]++;
continue;
}
/*
* On some CPUs the PEBS status can be zero when PEBS is
* racing with clearing of GLOBAL_STATUS.
*
* Normally we would drop that record, but in the
* case when there is only a single active PEBS event
* we can assume it's for that event.
*/
if (!pebs_status && cpuc->pebs_enabled &&
!(cpuc->pebs_enabled & (cpuc->pebs_enabled-1)))
pebs_status = p->status = cpuc->pebs_enabled;
bit = find_first_bit((unsigned long *)&pebs_status,
max_pebs_events);
if (!(x86_pmu.pebs_events_mask & (1 << bit)))
continue;
/*
* The PEBS hardware does not deal well with the situation
* when events happen near to each other and multiple bits
* are set. But it should happen rarely.
*
* If these events include one PEBS and multiple non-PEBS
* events, it doesn't impact PEBS record. The record will
* be handled normally. (slow path)
*
* If these events include two or more PEBS events, the
* records for the events can be collapsed into a single
* one, and it's not possible to reconstruct all events
* that caused the PEBS record. It's called collision.
* If collision happened, the record will be dropped.
*/
if (pebs_status != (1ULL << bit)) {
for_each_set_bit(i, (unsigned long *)&pebs_status, size)
error[i]++;
continue;
}
counts[bit]++;
}
for_each_set_bit(bit, (unsigned long *)&mask, size) {
if ((counts[bit] == 0) && (error[bit] == 0))
continue;
event = cpuc->events[bit];
if (WARN_ON_ONCE(!event))
continue;
if (WARN_ON_ONCE(!event->attr.precise_ip))
continue;
/* log dropped samples number */
if (error[bit]) {
perf_log_lost_samples(event, error[bit]);
if (iregs)
perf_event_account_interrupt(event);
}
if (counts[bit]) {
__intel_pmu_pebs_events(event, iregs, data, base,
top, bit, counts[bit],
setup_pebs_fixed_sample_data);
}
}
}
static __always_inline void
__intel_pmu_handle_pebs_record(struct pt_regs *iregs,
struct pt_regs *regs,
struct perf_sample_data *data,
void *at, u64 pebs_status,
short *counts, void **last,
setup_fn setup_sample)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct perf_event *event;
int bit;
for_each_set_bit(bit, (unsigned long *)&pebs_status, X86_PMC_IDX_MAX) {
event = cpuc->events[bit];
if (WARN_ON_ONCE(!event) ||
WARN_ON_ONCE(!event->attr.precise_ip))
continue;
if (counts[bit]++) {
__intel_pmu_pebs_event(event, iregs, regs, data,
last[bit], setup_sample);
}
last[bit] = at;
}
}
static __always_inline void
__intel_pmu_handle_last_pebs_record(struct pt_regs *iregs,
struct pt_regs *regs,
struct perf_sample_data *data,
u64 mask, short *counts, void **last,
setup_fn setup_sample)
{
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct perf_event *event;
int bit;
for_each_set_bit(bit, (unsigned long *)&mask, X86_PMC_IDX_MAX) {
if (!counts[bit])
continue;
event = cpuc->events[bit];
__intel_pmu_pebs_last_event(event, iregs, regs, data, last[bit],
counts[bit], setup_sample);
}
}
static void intel_pmu_drain_pebs_icl(struct pt_regs *iregs, struct perf_sample_data *data)
{
short counts[INTEL_PMC_IDX_FIXED + MAX_FIXED_PEBS_EVENTS] = {};
void *last[INTEL_PMC_IDX_FIXED + MAX_FIXED_PEBS_EVENTS];
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
struct debug_store *ds = cpuc->ds;
struct x86_perf_regs perf_regs;
struct pt_regs *regs = &perf_regs.regs;
struct pebs_basic *basic;
void *base, *at, *top;
u64 mask;
if (!x86_pmu.pebs_active)
return;
base = (struct pebs_basic *)(unsigned long)ds->pebs_buffer_base;
top = (struct pebs_basic *)(unsigned long)ds->pebs_index;
ds->pebs_index = ds->pebs_buffer_base;
mask = hybrid(cpuc->pmu, pebs_events_mask) |
(hybrid(cpuc->pmu, fixed_cntr_mask64) << INTEL_PMC_IDX_FIXED);
mask &= cpuc->pebs_enabled;
if (unlikely(base >= top)) {
intel_pmu_pebs_event_update_no_drain(cpuc, mask);
return;
}
if (!iregs)
iregs = &dummy_iregs;
/* Process all but the last event for each counter. */
for (at = base; at < top; at += basic->format_size) {
u64 pebs_status;
basic = at;
if (basic->format_size != cpuc->pebs_record_size)
continue;
pebs_status = mask & basic->applicable_counters;
__intel_pmu_handle_pebs_record(iregs, regs, data, at,
pebs_status, counts, last,
setup_pebs_adaptive_sample_data);
}
__intel_pmu_handle_last_pebs_record(iregs, regs, data, mask, counts, last,
setup_pebs_adaptive_sample_data);
}
static void intel_pmu_drain_arch_pebs(struct pt_regs *iregs,
struct perf_sample_data *data)
{
short counts[INTEL_PMC_IDX_FIXED + MAX_FIXED_PEBS_EVENTS] = {};
void *last[INTEL_PMC_IDX_FIXED + MAX_FIXED_PEBS_EVENTS];
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
union arch_pebs_index index;
struct x86_perf_regs perf_regs;
struct pt_regs *regs = &perf_regs.regs;
void *base, *at, *top;
u64 mask;
rdmsrq(MSR_IA32_PEBS_INDEX, index.whole);
if (unlikely(!index.wr)) {
intel_pmu_pebs_event_update_no_drain(cpuc, X86_PMC_IDX_MAX);
return;
}
base = cpuc->pebs_vaddr;
top = cpuc->pebs_vaddr + (index.wr << ARCH_PEBS_INDEX_WR_SHIFT);
index.wr = 0;
index.full = 0;
index.en = 1;
if (cpuc->n_pebs == cpuc->n_large_pebs)
index.thresh = ARCH_PEBS_THRESH_MULTI;
else
index.thresh = ARCH_PEBS_THRESH_SINGLE;
wrmsrq(MSR_IA32_PEBS_INDEX, index.whole);
mask = hybrid(cpuc->pmu, arch_pebs_cap).counters & cpuc->pebs_enabled;
if (!iregs)
iregs = &dummy_iregs;
/* Process all but the last event for each counter. */
for (at = base; at < top;) {
struct arch_pebs_header *header;
struct arch_pebs_basic *basic;
u64 pebs_status;
header = at;
if (WARN_ON_ONCE(!header->size))
break;
/* 1st fragment or single record must have basic group */
if (!header->basic) {
at += header->size;
continue;
}
basic = at + sizeof(struct arch_pebs_header);
pebs_status = mask & basic->applicable_counters;
__intel_pmu_handle_pebs_record(iregs, regs, data, at,
pebs_status, counts, last,
setup_arch_pebs_sample_data);
/* Skip non-last fragments */
while (arch_pebs_record_continued(header)) {
if (!header->size)
break;
at += header->size;
header = at;
}
/* Skip last fragment or the single record */
at += header->size;
}
__intel_pmu_handle_last_pebs_record(iregs, regs, data, mask,
counts, last,
setup_arch_pebs_sample_data);
}
static void __init intel_arch_pebs_init(void)
{
/*
* Current hybrid platforms always both support arch-PEBS or not
* on all kinds of cores. So directly set x86_pmu.arch_pebs flag
* if boot cpu supports arch-PEBS.
*/
x86_pmu.arch_pebs = 1;
x86_pmu.pebs_buffer_size = PEBS_BUFFER_SIZE;
x86_pmu.drain_pebs = intel_pmu_drain_arch_pebs;
x86_pmu.pebs_capable = ~0ULL;
x86_pmu.flags |= PMU_FL_PEBS_ALL;
x86_pmu.pebs_enable = __intel_pmu_pebs_enable;
x86_pmu.pebs_disable = __intel_pmu_pebs_disable;
}
/*
* PEBS probe and setup
*/
static void __init intel_ds_pebs_init(void)
{
/*
* No support for 32bit formats
*/
if (!boot_cpu_has(X86_FEATURE_DTES64))
return;
x86_pmu.ds_pebs = boot_cpu_has(X86_FEATURE_PEBS);
x86_pmu.pebs_buffer_size = PEBS_BUFFER_SIZE;
if (x86_pmu.version <= 4)
x86_pmu.pebs_no_isolation = 1;
if (x86_pmu.ds_pebs) {
char pebs_type = x86_pmu.intel_cap.pebs_trap ? '+' : '-';
char *pebs_qual = "";
int format = x86_pmu.intel_cap.pebs_format;
if (format < 4)
x86_pmu.intel_cap.pebs_baseline = 0;
x86_pmu.pebs_enable = intel_pmu_pebs_enable;
x86_pmu.pebs_disable = intel_pmu_pebs_disable;
x86_pmu.pebs_enable_all = intel_pmu_pebs_enable_all;
x86_pmu.pebs_disable_all = intel_pmu_pebs_disable_all;
switch (format) {
case 0:
pr_cont("PEBS fmt0%c, ", pebs_type);
x86_pmu.pebs_record_size = sizeof(struct pebs_record_core);
/*
* Using >PAGE_SIZE buffers makes the WRMSR to
* PERF_GLOBAL_CTRL in intel_pmu_enable_all()
* mysteriously hang on Core2.
*
* As a workaround, we don't do this.
*/
x86_pmu.pebs_buffer_size = PAGE_SIZE;
x86_pmu.drain_pebs = intel_pmu_drain_pebs_core;
break;
case 1:
pr_cont("PEBS fmt1%c, ", pebs_type);
x86_pmu.pebs_record_size = sizeof(struct pebs_record_nhm);
x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
break;
case 2:
pr_cont("PEBS fmt2%c, ", pebs_type);
x86_pmu.pebs_record_size = sizeof(struct pebs_record_hsw);
x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
break;
case 3:
pr_cont("PEBS fmt3%c, ", pebs_type);
x86_pmu.pebs_record_size =
sizeof(struct pebs_record_skl);
x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
x86_pmu.large_pebs_flags |= PERF_SAMPLE_TIME;
break;
case 6:
if (x86_pmu.intel_cap.pebs_baseline)
x86_pmu.large_pebs_flags |= PERF_SAMPLE_READ;
fallthrough;
case 5:
x86_pmu.pebs_ept = 1;
fallthrough;
case 4:
x86_pmu.drain_pebs = intel_pmu_drain_pebs_icl;
x86_pmu.pebs_record_size = sizeof(struct pebs_basic);
if (x86_pmu.intel_cap.pebs_baseline) {
x86_pmu.large_pebs_flags |=
PERF_SAMPLE_BRANCH_STACK |
PERF_SAMPLE_TIME;
x86_pmu.flags |= PMU_FL_PEBS_ALL;
x86_pmu.pebs_capable = ~0ULL;
pebs_qual = "-baseline";
x86_get_pmu(smp_processor_id())->capabilities |= PERF_PMU_CAP_EXTENDED_REGS;
} else {
/* Only basic record supported */
x86_pmu.large_pebs_flags &=
~(PERF_SAMPLE_ADDR |
PERF_SAMPLE_TIME |
PERF_SAMPLE_DATA_SRC |
PERF_SAMPLE_TRANSACTION |
PERF_SAMPLE_REGS_USER |
PERF_SAMPLE_REGS_INTR);
}
pr_cont("PEBS fmt%d%c%s, ", format, pebs_type, pebs_qual);
/*
* The PEBS-via-PT is not supported on hybrid platforms,
* because not all CPUs of a hybrid machine support it.
* The global x86_pmu.intel_cap, which only contains the
* common capabilities, is used to check the availability
* of the feature. The per-PMU pebs_output_pt_available
* in a hybrid machine should be ignored.
*/
if (x86_pmu.intel_cap.pebs_output_pt_available) {
pr_cont("PEBS-via-PT, ");
x86_get_pmu(smp_processor_id())->capabilities |= PERF_PMU_CAP_AUX_OUTPUT;
}
break;
default:
pr_cont("no PEBS fmt%d%c, ", format, pebs_type);
x86_pmu.ds_pebs = 0;
}
}
}
void __init intel_pebs_init(void)
{
if (x86_pmu.intel_cap.pebs_format == 0xf)
intel_arch_pebs_init();
else
intel_ds_pebs_init();
}
void perf_restore_debug_store(void)
{
struct debug_store *ds = __this_cpu_read(cpu_hw_events.ds);
if (!x86_pmu.bts && !x86_pmu.ds_pebs)
return;
wrmsrq(MSR_IA32_DS_AREA, (unsigned long)ds);
}
