/tools/perf/arch/powerpc/util/perf_regs.c
C | 228 lines | 165 code | 28 blank | 35 comment | 20 complexity | 274f387863a38b688d7a32a515503a39 MD5 | raw file
- // SPDX-License-Identifier: GPL-2.0
- #include <errno.h>
- #include <string.h>
- #include <regex.h>
- #include <linux/zalloc.h>
- #include "../../../util/perf_regs.h"
- #include "../../../util/debug.h"
- #include "../../../util/event.h"
- #include "../../../util/header.h"
- #include "../../../perf-sys.h"
- #include "utils_header.h"
- #include <linux/kernel.h>
- #define PVR_POWER9 0x004E
- #define PVR_POWER10 0x0080
- const struct sample_reg sample_reg_masks[] = {
- SMPL_REG(r0, PERF_REG_POWERPC_R0),
- SMPL_REG(r1, PERF_REG_POWERPC_R1),
- SMPL_REG(r2, PERF_REG_POWERPC_R2),
- SMPL_REG(r3, PERF_REG_POWERPC_R3),
- SMPL_REG(r4, PERF_REG_POWERPC_R4),
- SMPL_REG(r5, PERF_REG_POWERPC_R5),
- SMPL_REG(r6, PERF_REG_POWERPC_R6),
- SMPL_REG(r7, PERF_REG_POWERPC_R7),
- SMPL_REG(r8, PERF_REG_POWERPC_R8),
- SMPL_REG(r9, PERF_REG_POWERPC_R9),
- SMPL_REG(r10, PERF_REG_POWERPC_R10),
- SMPL_REG(r11, PERF_REG_POWERPC_R11),
- SMPL_REG(r12, PERF_REG_POWERPC_R12),
- SMPL_REG(r13, PERF_REG_POWERPC_R13),
- SMPL_REG(r14, PERF_REG_POWERPC_R14),
- SMPL_REG(r15, PERF_REG_POWERPC_R15),
- SMPL_REG(r16, PERF_REG_POWERPC_R16),
- SMPL_REG(r17, PERF_REG_POWERPC_R17),
- SMPL_REG(r18, PERF_REG_POWERPC_R18),
- SMPL_REG(r19, PERF_REG_POWERPC_R19),
- SMPL_REG(r20, PERF_REG_POWERPC_R20),
- SMPL_REG(r21, PERF_REG_POWERPC_R21),
- SMPL_REG(r22, PERF_REG_POWERPC_R22),
- SMPL_REG(r23, PERF_REG_POWERPC_R23),
- SMPL_REG(r24, PERF_REG_POWERPC_R24),
- SMPL_REG(r25, PERF_REG_POWERPC_R25),
- SMPL_REG(r26, PERF_REG_POWERPC_R26),
- SMPL_REG(r27, PERF_REG_POWERPC_R27),
- SMPL_REG(r28, PERF_REG_POWERPC_R28),
- SMPL_REG(r29, PERF_REG_POWERPC_R29),
- SMPL_REG(r30, PERF_REG_POWERPC_R30),
- SMPL_REG(r31, PERF_REG_POWERPC_R31),
- SMPL_REG(nip, PERF_REG_POWERPC_NIP),
- SMPL_REG(msr, PERF_REG_POWERPC_MSR),
- SMPL_REG(orig_r3, PERF_REG_POWERPC_ORIG_R3),
- SMPL_REG(ctr, PERF_REG_POWERPC_CTR),
- SMPL_REG(link, PERF_REG_POWERPC_LINK),
- SMPL_REG(xer, PERF_REG_POWERPC_XER),
- SMPL_REG(ccr, PERF_REG_POWERPC_CCR),
- SMPL_REG(softe, PERF_REG_POWERPC_SOFTE),
- SMPL_REG(trap, PERF_REG_POWERPC_TRAP),
- SMPL_REG(dar, PERF_REG_POWERPC_DAR),
- SMPL_REG(dsisr, PERF_REG_POWERPC_DSISR),
- SMPL_REG(sier, PERF_REG_POWERPC_SIER),
- SMPL_REG(mmcra, PERF_REG_POWERPC_MMCRA),
- SMPL_REG(mmcr0, PERF_REG_POWERPC_MMCR0),
- SMPL_REG(mmcr1, PERF_REG_POWERPC_MMCR1),
- SMPL_REG(mmcr2, PERF_REG_POWERPC_MMCR2),
- SMPL_REG(mmcr3, PERF_REG_POWERPC_MMCR3),
- SMPL_REG(sier2, PERF_REG_POWERPC_SIER2),
- SMPL_REG(sier3, PERF_REG_POWERPC_SIER3),
- SMPL_REG(pmc1, PERF_REG_POWERPC_PMC1),
- SMPL_REG(pmc2, PERF_REG_POWERPC_PMC2),
- SMPL_REG(pmc3, PERF_REG_POWERPC_PMC3),
- SMPL_REG(pmc4, PERF_REG_POWERPC_PMC4),
- SMPL_REG(pmc5, PERF_REG_POWERPC_PMC5),
- SMPL_REG(pmc6, PERF_REG_POWERPC_PMC6),
- SMPL_REG(sdar, PERF_REG_POWERPC_SDAR),
- SMPL_REG(siar, PERF_REG_POWERPC_SIAR),
- SMPL_REG_END
- };
- /* REG or %rREG */
- #define SDT_OP_REGEX1 "^(%r)?([1-2]?[0-9]|3[0-1])$"
- /* -NUM(REG) or NUM(REG) or -NUM(%rREG) or NUM(%rREG) */
- #define SDT_OP_REGEX2 "^(\\-)?([0-9]+)\\((%r)?([1-2]?[0-9]|3[0-1])\\)$"
- static regex_t sdt_op_regex1, sdt_op_regex2;
- static int sdt_init_op_regex(void)
- {
- static int initialized;
- int ret = 0;
- if (initialized)
- return 0;
- ret = regcomp(&sdt_op_regex1, SDT_OP_REGEX1, REG_EXTENDED);
- if (ret)
- goto error;
- ret = regcomp(&sdt_op_regex2, SDT_OP_REGEX2, REG_EXTENDED);
- if (ret)
- goto free_regex1;
- initialized = 1;
- return 0;
- free_regex1:
- regfree(&sdt_op_regex1);
- error:
- pr_debug4("Regex compilation error.\n");
- return ret;
- }
- /*
- * Parse OP and convert it into uprobe format, which is, +/-NUM(%gprREG).
- * Possible variants of OP are:
- * Format Example
- * -------------------------
- * NUM(REG) 48(18)
- * -NUM(REG) -48(18)
- * NUM(%rREG) 48(%r18)
- * -NUM(%rREG) -48(%r18)
- * REG 18
- * %rREG %r18
- * iNUM i0
- * i-NUM i-1
- *
- * SDT marker arguments on Powerpc uses %rREG form with -mregnames flag
- * and REG form with -mno-regnames. Here REG is general purpose register,
- * which is in 0 to 31 range.
- */
- int arch_sdt_arg_parse_op(char *old_op, char **new_op)
- {
- int ret, new_len;
- regmatch_t rm[5];
- char prefix;
- /* Constant argument. Uprobe does not support it */
- if (old_op[0] == 'i') {
- pr_debug4("Skipping unsupported SDT argument: %s\n", old_op);
- return SDT_ARG_SKIP;
- }
- ret = sdt_init_op_regex();
- if (ret < 0)
- return ret;
- if (!regexec(&sdt_op_regex1, old_op, 3, rm, 0)) {
- /* REG or %rREG --> %gprREG */
- new_len = 5; /* % g p r NULL */
- new_len += (int)(rm[2].rm_eo - rm[2].rm_so);
- *new_op = zalloc(new_len);
- if (!*new_op)
- return -ENOMEM;
- scnprintf(*new_op, new_len, "%%gpr%.*s",
- (int)(rm[2].rm_eo - rm[2].rm_so), old_op + rm[2].rm_so);
- } else if (!regexec(&sdt_op_regex2, old_op, 5, rm, 0)) {
- /*
- * -NUM(REG) or NUM(REG) or -NUM(%rREG) or NUM(%rREG) -->
- * +/-NUM(%gprREG)
- */
- prefix = (rm[1].rm_so == -1) ? '+' : '-';
- new_len = 8; /* +/- ( % g p r ) NULL */
- new_len += (int)(rm[2].rm_eo - rm[2].rm_so);
- new_len += (int)(rm[4].rm_eo - rm[4].rm_so);
- *new_op = zalloc(new_len);
- if (!*new_op)
- return -ENOMEM;
- scnprintf(*new_op, new_len, "%c%.*s(%%gpr%.*s)", prefix,
- (int)(rm[2].rm_eo - rm[2].rm_so), old_op + rm[2].rm_so,
- (int)(rm[4].rm_eo - rm[4].rm_so), old_op + rm[4].rm_so);
- } else {
- pr_debug4("Skipping unsupported SDT argument: %s\n", old_op);
- return SDT_ARG_SKIP;
- }
- return SDT_ARG_VALID;
- }
- uint64_t arch__intr_reg_mask(void)
- {
- struct perf_event_attr attr = {
- .type = PERF_TYPE_HARDWARE,
- .config = PERF_COUNT_HW_CPU_CYCLES,
- .sample_type = PERF_SAMPLE_REGS_INTR,
- .precise_ip = 1,
- .disabled = 1,
- .exclude_kernel = 1,
- };
- int fd;
- u32 version;
- u64 extended_mask = 0, mask = PERF_REGS_MASK;
- /*
- * Get the PVR value to set the extended
- * mask specific to platform.
- */
- version = (((mfspr(SPRN_PVR)) >> 16) & 0xFFFF);
- if (version == PVR_POWER9)
- extended_mask = PERF_REG_PMU_MASK_300;
- else if (version == PVR_POWER10)
- extended_mask = PERF_REG_PMU_MASK_31;
- else
- return mask;
- attr.sample_regs_intr = extended_mask;
- attr.sample_period = 1;
- event_attr_init(&attr);
- /*
- * check if the pmu supports perf extended regs, before
- * returning the register mask to sample.
- */
- fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
- if (fd != -1) {
- close(fd);
- mask |= extended_mask;
- }
- return mask;
- }