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Every architecture can provide a register list for sampling. If an architecture doesn't support register sampling, it won't define the data structure 'sample_reg_masks'. Consequently, any code using this structure must be protected by the macro 'HAVE_PERF_REGS_SUPPORT'. This patch defines a weak function, arch__sample_reg_masks(), which will be replaced by an architecture-defined function for returning the architecture's register list. With this refactoring, the function always exists, the condition checking for 'HAVE_PERF_REGS_SUPPORT' is not needed anymore, so remove it. Signed-off-by: Leo Yan <leo.yan@linux.dev> Reviewed-by: Ian Rogers <irogers@google.com> Cc: James Clark <james.clark@arm.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Guo Ren <guoren@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Ming Wang <wangming01@loongson.cn> Cc: John Garry <john.g.garry@oracle.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-csky@vger.kernel.org Cc: linux-riscv@lists.infradead.org Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240214113947.240957-4-leo.yan@linux.dev
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <errno.h>
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#include <string.h>
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#include "perf_regs.h"
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#include "util/sample.h"
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#include "debug.h"
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int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused,
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char **new_op __maybe_unused)
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{
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return SDT_ARG_SKIP;
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}
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uint64_t __weak arch__intr_reg_mask(void)
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{
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return 0;
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}
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uint64_t __weak arch__user_reg_mask(void)
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{
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return 0;
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}
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static const struct sample_reg sample_reg_masks[] = {
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SMPL_REG_END
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};
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const struct sample_reg * __weak arch__sample_reg_masks(void)
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{
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return sample_reg_masks;
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}
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const char *perf_reg_name(int id, const char *arch)
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{
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const char *reg_name = NULL;
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if (!strcmp(arch, "csky"))
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reg_name = __perf_reg_name_csky(id);
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else if (!strcmp(arch, "loongarch"))
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reg_name = __perf_reg_name_loongarch(id);
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else if (!strcmp(arch, "mips"))
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reg_name = __perf_reg_name_mips(id);
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else if (!strcmp(arch, "powerpc"))
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reg_name = __perf_reg_name_powerpc(id);
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else if (!strcmp(arch, "riscv"))
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reg_name = __perf_reg_name_riscv(id);
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else if (!strcmp(arch, "s390"))
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reg_name = __perf_reg_name_s390(id);
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else if (!strcmp(arch, "x86"))
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reg_name = __perf_reg_name_x86(id);
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else if (!strcmp(arch, "arm"))
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reg_name = __perf_reg_name_arm(id);
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else if (!strcmp(arch, "arm64"))
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reg_name = __perf_reg_name_arm64(id);
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return reg_name ?: "unknown";
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}
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int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
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{
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int i, idx = 0;
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u64 mask = regs->mask;
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if ((u64)id >= PERF_SAMPLE_REGS_CACHE_SIZE)
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return -EINVAL;
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if (regs->cache_mask & (1ULL << id))
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goto out;
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if (!(mask & (1ULL << id)))
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return -EINVAL;
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for (i = 0; i < id; i++) {
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if (mask & (1ULL << i))
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idx++;
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}
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regs->cache_mask |= (1ULL << id);
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regs->cache_regs[id] = regs->regs[idx];
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out:
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*valp = regs->cache_regs[id];
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return 0;
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}
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uint64_t perf_arch_reg_ip(const char *arch)
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{
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if (!strcmp(arch, "arm"))
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return __perf_reg_ip_arm();
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else if (!strcmp(arch, "arm64"))
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return __perf_reg_ip_arm64();
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else if (!strcmp(arch, "csky"))
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return __perf_reg_ip_csky();
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else if (!strcmp(arch, "loongarch"))
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return __perf_reg_ip_loongarch();
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else if (!strcmp(arch, "mips"))
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return __perf_reg_ip_mips();
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else if (!strcmp(arch, "powerpc"))
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return __perf_reg_ip_powerpc();
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else if (!strcmp(arch, "riscv"))
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return __perf_reg_ip_riscv();
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else if (!strcmp(arch, "s390"))
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return __perf_reg_ip_s390();
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else if (!strcmp(arch, "x86"))
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return __perf_reg_ip_x86();
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pr_err("Fail to find IP register for arch %s, returns 0\n", arch);
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return 0;
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}
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uint64_t perf_arch_reg_sp(const char *arch)
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{
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if (!strcmp(arch, "arm"))
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return __perf_reg_sp_arm();
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else if (!strcmp(arch, "arm64"))
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return __perf_reg_sp_arm64();
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else if (!strcmp(arch, "csky"))
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return __perf_reg_sp_csky();
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else if (!strcmp(arch, "loongarch"))
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return __perf_reg_sp_loongarch();
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else if (!strcmp(arch, "mips"))
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return __perf_reg_sp_mips();
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else if (!strcmp(arch, "powerpc"))
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return __perf_reg_sp_powerpc();
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else if (!strcmp(arch, "riscv"))
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return __perf_reg_sp_riscv();
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else if (!strcmp(arch, "s390"))
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return __perf_reg_sp_s390();
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else if (!strcmp(arch, "x86"))
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return __perf_reg_sp_x86();
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pr_err("Fail to find SP register for arch %s, returns 0\n", arch);
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return 0;
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}
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