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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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af785e75bf
There may be different register mask for use with intr or user on some platforms, e.g. Icelake. Add weak functions arch__intr_reg_mask() and arch__user_reg_mask() to return intr and user register mask respectively. Check mask before printing or comparing the register name. Generic code always return PERF_REGS_MASK. No functional change. Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/1557865174-56264-2-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
51 lines
872 B
C
51 lines
872 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <errno.h>
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#include "perf_regs.h"
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#include "event.h"
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const struct sample_reg __weak sample_reg_masks[] = {
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SMPL_REG_END
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};
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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 PERF_REGS_MASK;
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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 PERF_REGS_MASK;
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}
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#ifdef HAVE_PERF_REGS_SUPPORT
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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 (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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#endif
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