cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

power5-pmu.c (17005B)


      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Performance counter support for POWER5 (not POWER5++) processors.
      4 *
      5 * Copyright 2009 Paul Mackerras, IBM Corporation.
      6 */
      7#include <linux/kernel.h>
      8#include <linux/perf_event.h>
      9#include <linux/string.h>
     10#include <asm/reg.h>
     11#include <asm/cputable.h>
     12
     13#include "internal.h"
     14
     15/*
     16 * Bits in event code for POWER5 (not POWER5++)
     17 */
     18#define PM_PMC_SH	20	/* PMC number (1-based) for direct events */
     19#define PM_PMC_MSK	0xf
     20#define PM_PMC_MSKS	(PM_PMC_MSK << PM_PMC_SH)
     21#define PM_UNIT_SH	16	/* TTMMUX number and setting - unit select */
     22#define PM_UNIT_MSK	0xf
     23#define PM_BYTE_SH	12	/* Byte number of event bus to use */
     24#define PM_BYTE_MSK	7
     25#define PM_GRS_SH	8	/* Storage subsystem mux select */
     26#define PM_GRS_MSK	7
     27#define PM_BUSEVENT_MSK	0x80	/* Set if event uses event bus */
     28#define PM_PMCSEL_MSK	0x7f
     29
     30/* Values in PM_UNIT field */
     31#define PM_FPU		0
     32#define PM_ISU0		1
     33#define PM_IFU		2
     34#define PM_ISU1		3
     35#define PM_IDU		4
     36#define PM_ISU0_ALT	6
     37#define PM_GRS		7
     38#define PM_LSU0		8
     39#define PM_LSU1		0xc
     40#define PM_LASTUNIT	0xc
     41
     42/*
     43 * Bits in MMCR1 for POWER5
     44 */
     45#define MMCR1_TTM0SEL_SH	62
     46#define MMCR1_TTM1SEL_SH	60
     47#define MMCR1_TTM2SEL_SH	58
     48#define MMCR1_TTM3SEL_SH	56
     49#define MMCR1_TTMSEL_MSK	3
     50#define MMCR1_TD_CP_DBG0SEL_SH	54
     51#define MMCR1_TD_CP_DBG1SEL_SH	52
     52#define MMCR1_TD_CP_DBG2SEL_SH	50
     53#define MMCR1_TD_CP_DBG3SEL_SH	48
     54#define MMCR1_GRS_L2SEL_SH	46
     55#define MMCR1_GRS_L2SEL_MSK	3
     56#define MMCR1_GRS_L3SEL_SH	44
     57#define MMCR1_GRS_L3SEL_MSK	3
     58#define MMCR1_GRS_MCSEL_SH	41
     59#define MMCR1_GRS_MCSEL_MSK	7
     60#define MMCR1_GRS_FABSEL_SH	39
     61#define MMCR1_GRS_FABSEL_MSK	3
     62#define MMCR1_PMC1_ADDER_SEL_SH	35
     63#define MMCR1_PMC2_ADDER_SEL_SH	34
     64#define MMCR1_PMC3_ADDER_SEL_SH	33
     65#define MMCR1_PMC4_ADDER_SEL_SH	32
     66#define MMCR1_PMC1SEL_SH	25
     67#define MMCR1_PMC2SEL_SH	17
     68#define MMCR1_PMC3SEL_SH	9
     69#define MMCR1_PMC4SEL_SH	1
     70#define MMCR1_PMCSEL_SH(n)	(MMCR1_PMC1SEL_SH - (n) * 8)
     71#define MMCR1_PMCSEL_MSK	0x7f
     72
     73/*
     74 * Layout of constraint bits:
     75 * 6666555555555544444444443333333333222222222211111111110000000000
     76 * 3210987654321098765432109876543210987654321098765432109876543210
     77 *         <><>[  ><><>< ><> [  >[ >[ ><  ><  ><  ><  ><><><><><><>
     78 *         T0T1 NC G0G1G2 G3  UC PS1PS2 B0  B1  B2  B3 P6P5P4P3P2P1
     79 *
     80 * T0 - TTM0 constraint
     81 *     54-55: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0xc0_0000_0000_0000
     82 *
     83 * T1 - TTM1 constraint
     84 *     52-53: TTM1SEL value (0=IDU, 3=GRS) 0x30_0000_0000_0000
     85 *
     86 * NC - number of counters
     87 *     51: NC error 0x0008_0000_0000_0000
     88 *     48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
     89 *
     90 * G0..G3 - GRS mux constraints
     91 *     46-47: GRS_L2SEL value
     92 *     44-45: GRS_L3SEL value
     93 *     41-44: GRS_MCSEL value
     94 *     39-40: GRS_FABSEL value
     95 *	Note that these match up with their bit positions in MMCR1
     96 *
     97 * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
     98 *     37: UC3 error 0x20_0000_0000
     99 *     36: FPU|IFU|ISU1 events needed 0x10_0000_0000
    100 *     35: ISU0 events needed 0x08_0000_0000
    101 *     34: IDU|GRS events needed 0x04_0000_0000
    102 *
    103 * PS1
    104 *     33: PS1 error 0x2_0000_0000
    105 *     31-32: count of events needing PMC1/2 0x1_8000_0000
    106 *
    107 * PS2
    108 *     30: PS2 error 0x4000_0000
    109 *     28-29: count of events needing PMC3/4 0x3000_0000
    110 *
    111 * B0
    112 *     24-27: Byte 0 event source 0x0f00_0000
    113 *	      Encoding as for the event code
    114 *
    115 * B1, B2, B3
    116 *     20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
    117 *
    118 * P1..P6
    119 *     0-11: Count of events needing PMC1..PMC6
    120 */
    121
    122static const int grsel_shift[8] = {
    123	MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
    124	MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
    125	MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
    126};
    127
    128/* Masks and values for using events from the various units */
    129static unsigned long unit_cons[PM_LASTUNIT+1][2] = {
    130	[PM_FPU] =   { 0xc0002000000000ul, 0x00001000000000ul },
    131	[PM_ISU0] =  { 0x00002000000000ul, 0x00000800000000ul },
    132	[PM_ISU1] =  { 0xc0002000000000ul, 0xc0001000000000ul },
    133	[PM_IFU] =   { 0xc0002000000000ul, 0x80001000000000ul },
    134	[PM_IDU] =   { 0x30002000000000ul, 0x00000400000000ul },
    135	[PM_GRS] =   { 0x30002000000000ul, 0x30000400000000ul },
    136};
    137
    138static int power5_get_constraint(u64 event, unsigned long *maskp,
    139				 unsigned long *valp, u64 event_config1 __maybe_unused)
    140{
    141	int pmc, byte, unit, sh;
    142	int bit, fmask;
    143	unsigned long mask = 0, value = 0;
    144	int grp = -1;
    145
    146	pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
    147	if (pmc) {
    148		if (pmc > 6)
    149			return -1;
    150		sh = (pmc - 1) * 2;
    151		mask |= 2 << sh;
    152		value |= 1 << sh;
    153		if (pmc <= 4)
    154			grp = (pmc - 1) >> 1;
    155		else if (event != 0x500009 && event != 0x600005)
    156			return -1;
    157	}
    158	if (event & PM_BUSEVENT_MSK) {
    159		unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
    160		if (unit > PM_LASTUNIT)
    161			return -1;
    162		if (unit == PM_ISU0_ALT)
    163			unit = PM_ISU0;
    164		mask |= unit_cons[unit][0];
    165		value |= unit_cons[unit][1];
    166		byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
    167		if (byte >= 4) {
    168			if (unit != PM_LSU1)
    169				return -1;
    170			/* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
    171			++unit;
    172			byte &= 3;
    173		}
    174		if (unit == PM_GRS) {
    175			bit = event & 7;
    176			fmask = (bit == 6)? 7: 3;
    177			sh = grsel_shift[bit];
    178			mask |= (unsigned long)fmask << sh;
    179			value |= (unsigned long)((event >> PM_GRS_SH) & fmask)
    180				<< sh;
    181		}
    182		/*
    183		 * Bus events on bytes 0 and 2 can be counted
    184		 * on PMC1/2; bytes 1 and 3 on PMC3/4.
    185		 */
    186		if (!pmc)
    187			grp = byte & 1;
    188		/* Set byte lane select field */
    189		mask  |= 0xfUL << (24 - 4 * byte);
    190		value |= (unsigned long)unit << (24 - 4 * byte);
    191	}
    192	if (grp == 0) {
    193		/* increment PMC1/2 field */
    194		mask  |= 0x200000000ul;
    195		value |= 0x080000000ul;
    196	} else if (grp == 1) {
    197		/* increment PMC3/4 field */
    198		mask  |= 0x40000000ul;
    199		value |= 0x10000000ul;
    200	}
    201	if (pmc < 5) {
    202		/* need a counter from PMC1-4 set */
    203		mask  |= 0x8000000000000ul;
    204		value |= 0x1000000000000ul;
    205	}
    206	*maskp = mask;
    207	*valp = value;
    208	return 0;
    209}
    210
    211#define MAX_ALT	3	/* at most 3 alternatives for any event */
    212
    213static const unsigned int event_alternatives[][MAX_ALT] = {
    214	{ 0x120e4,  0x400002 },			/* PM_GRP_DISP_REJECT */
    215	{ 0x410c7,  0x441084 },			/* PM_THRD_L2MISS_BOTH_CYC */
    216	{ 0x100005, 0x600005 },			/* PM_RUN_CYC */
    217	{ 0x100009, 0x200009, 0x500009 },	/* PM_INST_CMPL */
    218	{ 0x300009, 0x400009 },			/* PM_INST_DISP */
    219};
    220
    221/*
    222 * Scan the alternatives table for a match and return the
    223 * index into the alternatives table if found, else -1.
    224 */
    225static int find_alternative(u64 event)
    226{
    227	int i, j;
    228
    229	for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
    230		if (event < event_alternatives[i][0])
    231			break;
    232		for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
    233			if (event == event_alternatives[i][j])
    234				return i;
    235	}
    236	return -1;
    237}
    238
    239static const unsigned char bytedecode_alternatives[4][4] = {
    240	/* PMC 1 */	{ 0x21, 0x23, 0x25, 0x27 },
    241	/* PMC 2 */	{ 0x07, 0x17, 0x0e, 0x1e },
    242	/* PMC 3 */	{ 0x20, 0x22, 0x24, 0x26 },
    243	/* PMC 4 */	{ 0x07, 0x17, 0x0e, 0x1e }
    244};
    245
    246/*
    247 * Some direct events for decodes of event bus byte 3 have alternative
    248 * PMCSEL values on other counters.  This returns the alternative
    249 * event code for those that do, or -1 otherwise.
    250 */
    251static s64 find_alternative_bdecode(u64 event)
    252{
    253	int pmc, altpmc, pp, j;
    254
    255	pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
    256	if (pmc == 0 || pmc > 4)
    257		return -1;
    258	altpmc = 5 - pmc;	/* 1 <-> 4, 2 <-> 3 */
    259	pp = event & PM_PMCSEL_MSK;
    260	for (j = 0; j < 4; ++j) {
    261		if (bytedecode_alternatives[pmc - 1][j] == pp) {
    262			return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
    263				(altpmc << PM_PMC_SH) |
    264				bytedecode_alternatives[altpmc - 1][j];
    265		}
    266	}
    267	return -1;
    268}
    269
    270static int power5_get_alternatives(u64 event, unsigned int flags, u64 alt[])
    271{
    272	int i, j, nalt = 1;
    273	s64 ae;
    274
    275	alt[0] = event;
    276	nalt = 1;
    277	i = find_alternative(event);
    278	if (i >= 0) {
    279		for (j = 0; j < MAX_ALT; ++j) {
    280			ae = event_alternatives[i][j];
    281			if (ae && ae != event)
    282				alt[nalt++] = ae;
    283		}
    284	} else {
    285		ae = find_alternative_bdecode(event);
    286		if (ae > 0)
    287			alt[nalt++] = ae;
    288	}
    289	return nalt;
    290}
    291
    292/*
    293 * Map of which direct events on which PMCs are marked instruction events.
    294 * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
    295 * Bit 0 is set if it is marked for all PMCs.
    296 * The 0x80 bit indicates a byte decode PMCSEL value.
    297 */
    298static unsigned char direct_event_is_marked[0x28] = {
    299	0,	/* 00 */
    300	0x1f,	/* 01 PM_IOPS_CMPL */
    301	0x2,	/* 02 PM_MRK_GRP_DISP */
    302	0xe,	/* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
    303	0,	/* 04 */
    304	0x1c,	/* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
    305	0x80,	/* 06 */
    306	0x80,	/* 07 */
    307	0, 0, 0,/* 08 - 0a */
    308	0x18,	/* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
    309	0,	/* 0c */
    310	0x80,	/* 0d */
    311	0x80,	/* 0e */
    312	0,	/* 0f */
    313	0,	/* 10 */
    314	0x14,	/* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
    315	0,	/* 12 */
    316	0x10,	/* 13 PM_MRK_GRP_CMPL */
    317	0x1f,	/* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
    318	0x2,	/* 15 PM_MRK_GRP_ISSUED */
    319	0x80,	/* 16 */
    320	0x80,	/* 17 */
    321	0, 0, 0, 0, 0,
    322	0x80,	/* 1d */
    323	0x80,	/* 1e */
    324	0,	/* 1f */
    325	0x80,	/* 20 */
    326	0x80,	/* 21 */
    327	0x80,	/* 22 */
    328	0x80,	/* 23 */
    329	0x80,	/* 24 */
    330	0x80,	/* 25 */
    331	0x80,	/* 26 */
    332	0x80,	/* 27 */
    333};
    334
    335/*
    336 * Returns 1 if event counts things relating to marked instructions
    337 * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
    338 */
    339static int power5_marked_instr_event(u64 event)
    340{
    341	int pmc, psel;
    342	int bit, byte, unit;
    343	u32 mask;
    344
    345	pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
    346	psel = event & PM_PMCSEL_MSK;
    347	if (pmc >= 5)
    348		return 0;
    349
    350	bit = -1;
    351	if (psel < sizeof(direct_event_is_marked)) {
    352		if (direct_event_is_marked[psel] & (1 << pmc))
    353			return 1;
    354		if (direct_event_is_marked[psel] & 0x80)
    355			bit = 4;
    356		else if (psel == 0x08)
    357			bit = pmc - 1;
    358		else if (psel == 0x10)
    359			bit = 4 - pmc;
    360		else if (psel == 0x1b && (pmc == 1 || pmc == 3))
    361			bit = 4;
    362	} else if ((psel & 0x58) == 0x40)
    363		bit = psel & 7;
    364
    365	if (!(event & PM_BUSEVENT_MSK))
    366		return 0;
    367
    368	byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
    369	unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
    370	if (unit == PM_LSU0) {
    371		/* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
    372		mask = 0x5dff00;
    373	} else if (unit == PM_LSU1 && byte >= 4) {
    374		byte -= 4;
    375		/* byte 4 bits 1,3,5,7, byte 5 bits 6-7, byte 7 bits 0-4,6 */
    376		mask = 0x5f00c0aa;
    377	} else
    378		return 0;
    379
    380	return (mask >> (byte * 8 + bit)) & 1;
    381}
    382
    383static int power5_compute_mmcr(u64 event[], int n_ev,
    384			       unsigned int hwc[], struct mmcr_regs *mmcr,
    385			       struct perf_event *pevents[],
    386			       u32 flags __maybe_unused)
    387{
    388	unsigned long mmcr1 = 0;
    389	unsigned long mmcra = MMCRA_SDAR_DCACHE_MISS | MMCRA_SDAR_ERAT_MISS;
    390	unsigned int pmc, unit, byte, psel;
    391	unsigned int ttm, grp;
    392	int i, isbus, bit, grsel;
    393	unsigned int pmc_inuse = 0;
    394	unsigned int pmc_grp_use[2];
    395	unsigned char busbyte[4];
    396	unsigned char unituse[16];
    397	int ttmuse;
    398
    399	if (n_ev > 6)
    400		return -1;
    401
    402	/* First pass to count resource use */
    403	pmc_grp_use[0] = pmc_grp_use[1] = 0;
    404	memset(busbyte, 0, sizeof(busbyte));
    405	memset(unituse, 0, sizeof(unituse));
    406	for (i = 0; i < n_ev; ++i) {
    407		pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
    408		if (pmc) {
    409			if (pmc > 6)
    410				return -1;
    411			if (pmc_inuse & (1 << (pmc - 1)))
    412				return -1;
    413			pmc_inuse |= 1 << (pmc - 1);
    414			/* count 1/2 vs 3/4 use */
    415			if (pmc <= 4)
    416				++pmc_grp_use[(pmc - 1) >> 1];
    417		}
    418		if (event[i] & PM_BUSEVENT_MSK) {
    419			unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
    420			byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
    421			if (unit > PM_LASTUNIT)
    422				return -1;
    423			if (unit == PM_ISU0_ALT)
    424				unit = PM_ISU0;
    425			if (byte >= 4) {
    426				if (unit != PM_LSU1)
    427					return -1;
    428				++unit;
    429				byte &= 3;
    430			}
    431			if (!pmc)
    432				++pmc_grp_use[byte & 1];
    433			if (busbyte[byte] && busbyte[byte] != unit)
    434				return -1;
    435			busbyte[byte] = unit;
    436			unituse[unit] = 1;
    437		}
    438	}
    439	if (pmc_grp_use[0] > 2 || pmc_grp_use[1] > 2)
    440		return -1;
    441
    442	/*
    443	 * Assign resources and set multiplexer selects.
    444	 *
    445	 * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
    446	 * choice we have to deal with.
    447	 */
    448	if (unituse[PM_ISU0] &
    449	    (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
    450		unituse[PM_ISU0_ALT] = 1;	/* move ISU to TTM1 */
    451		unituse[PM_ISU0] = 0;
    452	}
    453	/* Set TTM[01]SEL fields. */
    454	ttmuse = 0;
    455	for (i = PM_FPU; i <= PM_ISU1; ++i) {
    456		if (!unituse[i])
    457			continue;
    458		if (ttmuse++)
    459			return -1;
    460		mmcr1 |= (unsigned long)i << MMCR1_TTM0SEL_SH;
    461	}
    462	ttmuse = 0;
    463	for (; i <= PM_GRS; ++i) {
    464		if (!unituse[i])
    465			continue;
    466		if (ttmuse++)
    467			return -1;
    468		mmcr1 |= (unsigned long)(i & 3) << MMCR1_TTM1SEL_SH;
    469	}
    470	if (ttmuse > 1)
    471		return -1;
    472
    473	/* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
    474	for (byte = 0; byte < 4; ++byte) {
    475		unit = busbyte[byte];
    476		if (!unit)
    477			continue;
    478		if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
    479			/* get ISU0 through TTM1 rather than TTM0 */
    480			unit = PM_ISU0_ALT;
    481		} else if (unit == PM_LSU1 + 1) {
    482			/* select lower word of LSU1 for this byte */
    483			mmcr1 |= 1ul << (MMCR1_TTM3SEL_SH + 3 - byte);
    484		}
    485		ttm = unit >> 2;
    486		mmcr1 |= (unsigned long)ttm
    487			<< (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
    488	}
    489
    490	/* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
    491	for (i = 0; i < n_ev; ++i) {
    492		pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
    493		unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
    494		byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
    495		psel = event[i] & PM_PMCSEL_MSK;
    496		isbus = event[i] & PM_BUSEVENT_MSK;
    497		if (!pmc) {
    498			/* Bus event or any-PMC direct event */
    499			for (pmc = 0; pmc < 4; ++pmc) {
    500				if (pmc_inuse & (1 << pmc))
    501					continue;
    502				grp = (pmc >> 1) & 1;
    503				if (isbus) {
    504					if (grp == (byte & 1))
    505						break;
    506				} else if (pmc_grp_use[grp] < 2) {
    507					++pmc_grp_use[grp];
    508					break;
    509				}
    510			}
    511			pmc_inuse |= 1 << pmc;
    512		} else if (pmc <= 4) {
    513			/* Direct event */
    514			--pmc;
    515			if ((psel == 8 || psel == 0x10) && isbus && (byte & 2))
    516				/* add events on higher-numbered bus */
    517				mmcr1 |= 1ul << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
    518		} else {
    519			/* Instructions or run cycles on PMC5/6 */
    520			--pmc;
    521		}
    522		if (isbus && unit == PM_GRS) {
    523			bit = psel & 7;
    524			grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
    525			mmcr1 |= (unsigned long)grsel << grsel_shift[bit];
    526		}
    527		if (power5_marked_instr_event(event[i]))
    528			mmcra |= MMCRA_SAMPLE_ENABLE;
    529		if (pmc <= 3)
    530			mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
    531		hwc[i] = pmc;
    532	}
    533
    534	/* Return MMCRx values */
    535	mmcr->mmcr0 = 0;
    536	if (pmc_inuse & 1)
    537		mmcr->mmcr0 = MMCR0_PMC1CE;
    538	if (pmc_inuse & 0x3e)
    539		mmcr->mmcr0 |= MMCR0_PMCjCE;
    540	mmcr->mmcr1 = mmcr1;
    541	mmcr->mmcra = mmcra;
    542	return 0;
    543}
    544
    545static void power5_disable_pmc(unsigned int pmc, struct mmcr_regs *mmcr)
    546{
    547	if (pmc <= 3)
    548		mmcr->mmcr1 &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
    549}
    550
    551static int power5_generic_events[] = {
    552	[PERF_COUNT_HW_CPU_CYCLES]		= 0xf,
    553	[PERF_COUNT_HW_INSTRUCTIONS]		= 0x100009,
    554	[PERF_COUNT_HW_CACHE_REFERENCES]	= 0x4c1090, /* LD_REF_L1 */
    555	[PERF_COUNT_HW_CACHE_MISSES]		= 0x3c1088, /* LD_MISS_L1 */
    556	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS]	= 0x230e4,  /* BR_ISSUED */
    557	[PERF_COUNT_HW_BRANCH_MISSES]		= 0x230e5,  /* BR_MPRED_CR */
    558};
    559
    560#define C(x)	PERF_COUNT_HW_CACHE_##x
    561
    562/*
    563 * Table of generalized cache-related events.
    564 * 0 means not supported, -1 means nonsensical, other values
    565 * are event codes.
    566 */
    567static u64 power5_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
    568	[C(L1D)] = {		/* 	RESULT_ACCESS	RESULT_MISS */
    569		[C(OP_READ)] = {	0x4c1090,	0x3c1088	},
    570		[C(OP_WRITE)] = {	0x3c1090,	0xc10c3		},
    571		[C(OP_PREFETCH)] = {	0xc70e7,	0		},
    572	},
    573	[C(L1I)] = {		/* 	RESULT_ACCESS	RESULT_MISS */
    574		[C(OP_READ)] = {	0,		0		},
    575		[C(OP_WRITE)] = {	-1,		-1		},
    576		[C(OP_PREFETCH)] = {	0,		0		},
    577	},
    578	[C(LL)] = {		/* 	RESULT_ACCESS	RESULT_MISS */
    579		[C(OP_READ)] = {	0,		0x3c309b	},
    580		[C(OP_WRITE)] = {	0,		0		},
    581		[C(OP_PREFETCH)] = {	0xc50c3,	0		},
    582	},
    583	[C(DTLB)] = {		/* 	RESULT_ACCESS	RESULT_MISS */
    584		[C(OP_READ)] = {	0x2c4090,	0x800c4		},
    585		[C(OP_WRITE)] = {	-1,		-1		},
    586		[C(OP_PREFETCH)] = {	-1,		-1		},
    587	},
    588	[C(ITLB)] = {		/* 	RESULT_ACCESS	RESULT_MISS */
    589		[C(OP_READ)] = {	0,		0x800c0		},
    590		[C(OP_WRITE)] = {	-1,		-1		},
    591		[C(OP_PREFETCH)] = {	-1,		-1		},
    592	},
    593	[C(BPU)] = {		/* 	RESULT_ACCESS	RESULT_MISS */
    594		[C(OP_READ)] = {	0x230e4,	0x230e5		},
    595		[C(OP_WRITE)] = {	-1,		-1		},
    596		[C(OP_PREFETCH)] = {	-1,		-1		},
    597	},
    598	[C(NODE)] = {		/* 	RESULT_ACCESS	RESULT_MISS */
    599		[C(OP_READ)] = {	-1,		-1		},
    600		[C(OP_WRITE)] = {	-1,		-1		},
    601		[C(OP_PREFETCH)] = {	-1,		-1		},
    602	},
    603};
    604
    605static struct power_pmu power5_pmu = {
    606	.name			= "POWER5",
    607	.n_counter		= 6,
    608	.max_alternatives	= MAX_ALT,
    609	.add_fields		= 0x7000090000555ul,
    610	.test_adder		= 0x3000490000000ul,
    611	.compute_mmcr		= power5_compute_mmcr,
    612	.get_constraint		= power5_get_constraint,
    613	.get_alternatives	= power5_get_alternatives,
    614	.disable_pmc		= power5_disable_pmc,
    615	.n_generic		= ARRAY_SIZE(power5_generic_events),
    616	.generic_events		= power5_generic_events,
    617	.cache_events		= &power5_cache_events,
    618	.flags			= PPMU_HAS_SSLOT,
    619};
    620
    621int __init init_power5_pmu(void)
    622{
    623	if (!cur_cpu_spec->oprofile_cpu_type ||
    624	    strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5"))
    625		return -ENODEV;
    626
    627	return register_power_pmu(&power5_pmu);
    628}