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s390/perf: extend perf_regs support to include floating-point registers

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Extend the perf register support to also export floating-point register
contents for user space tasks.  Floating-point registers might be used
in leaf functions to contain the return address.  Hence, they are required
for proper DWARF unwinding.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Reviewed-and-tested-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hendrik Brueckner
2017-11-08 07:30:15 +01:00
committed by Martin Schwidefsky
parent a9fc2db0a8
commit 0da0017f72
2 changed files with 37 additions and 0 deletions
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16
arch/s390/include/uapi/asm/perf_regs.h
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@@ -18,6 +18,22 @@ enum perf_event_s390_regs {
PERF_REG_S390_R13,
PERF_REG_S390_R14,
PERF_REG_S390_R15,
PERF_REG_S390_FP0,
PERF_REG_S390_FP1,
PERF_REG_S390_FP2,
PERF_REG_S390_FP3,
PERF_REG_S390_FP4,
PERF_REG_S390_FP5,
PERF_REG_S390_FP6,
PERF_REG_S390_FP7,
PERF_REG_S390_FP8,
PERF_REG_S390_FP9,
PERF_REG_S390_FP10,
PERF_REG_S390_FP11,
PERF_REG_S390_FP12,
PERF_REG_S390_FP13,
PERF_REG_S390_FP14,
PERF_REG_S390_FP15,
PERF_REG_S390_MASK,
PERF_REG_S390_PC,