On Thu, Feb 04, 2021 at 11:35:22AM +0800, Tiezhu Yang wrote:

Add perf_event_mips_regs/perf_reg_value/perf_reg_validate to support
features HAVE_PERF_REGS/HAVE_PERF_USER_STACK_DUMP in kernel.

[ayan@wavecomp.com: Repick this patch for unwinding userstack backtrace
 by perf and libunwind on MIPS based CPU.]

[ralf@linux-mips.org: Add perf_get_regs_user() which is required after
'commit 88a7c26af8da ("perf: Move task_pt_regs sampling into arch code")'.]

[yangtiezhu@loongson.cn: Fix build error about perf_get_regs_user() after
commit 76a4efa80900 ("perf/arch: Remove perf_sample_data::regs_user_copy"),
and also separate the original patches into two parts (MIPS kernel and perf
tools) to merge easily.]

The original patches:
https://lore.kernel.org/patchwork/patch/1126521/
https://lore.kernel.org/patchwork/patch/1126520/

Signed-off-by: David Daney <redacted>
Signed-off-by: Ralf Baechle <redacted>
Signed-off-by: Archer Yan <redacted>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---

v2: add R26 and R27 to the enum perf_event_mips_regs

 arch/mips/Kconfig                      |  2 +
 arch/mips/include/uapi/asm/perf_regs.h | 40 ++++++++++++++++++++
 arch/mips/kernel/Makefile              |  2 +-
 arch/mips/kernel/perf_regs.c           | 68 ++++++++++++++++++++++++++++++++++
 4 files changed, 111 insertions(+), 1 deletion(-)
 create mode 100644 arch/mips/include/uapi/asm/perf_regs.h
 create mode 100644 arch/mips/kernel/perf_regs.c

applied to mips-next.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
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