[PATCH v11 00/27] Add new powerpc specific ELF core notes

wei.guo.simon
2016-07-17T02:00:56Z

From: Simon Guo <wei.guo.simon@gmail.com>

This patch series adds twelve new ELF core note sections which can
be used with existing ptrace request PTRACE_GETREG/SET-SETREGSET for accessing
various transactional memory and other miscellaneous debug register sets on
powerpc platform.

Note this patch series now depends on following patch:
[PATCH 3/5] powerpc: tm: Always use fp_state and vr_state to store live registers

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Cyril Bur <cyrilbur@gmail.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Simon Guo <wei.guo.simon@gmail.com>
Cc: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Rashmica Gupta <rashmicy@gmail.com>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Jessica Yu <jeyu@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Miroslav Benes <mbenes@suse.cz>
Cc: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Cc: Chris Smart <chris@distroguy.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>

Test Result (All tests pass on both BE and LE)
----------------------------------------------
ptrace-ebb PASS
ptrace-gpr PASS
ptrace-tm-gpr PASS
ptrace-tm-spd-gpr PASS
ptrace-tar PASS
ptrace-tm-tar PASS
ptrace-tm-spd-tar PASS
ptrace-vsx PASS
ptrace-tm-vsx PASS
ptrace-tm-spd-vsx PASS
ptrace-tm-spr PASS

Previous versions:
==================
RFC: https://lkml.org/lkml/2014/4/1/292
V1: https://lkml.org/lkml/2014/4/2/43
V2: https://lkml.org/lkml/2014/5/5/88
V3: https://lkml.org/lkml/2014/5/23/486
V4: https://lkml.org/lkml/2014/11/11/6
V5: https://lkml.org/lkml/2014/11/25/134
V6: https://lkml.org/lkml/2014/12/2/98
V7: https://lkml.org/lkml/2015/1/14/19
V8: https://lkml.org/lkml/2015/5/19/700
V9: https://lkml.org/lkml/2015/10/8/522
V10: https://lkml.org/lkml/2016/2/16/219

Changes in V11:
---------------
- Rework based on following patch:
[PATCH 3/5] powerpc: tm: Always use fp_state and vr_state to store live registers
- Split EBB/PMU register ptrace implementation.
- Clean some coding style warning
- Added more shared memory based sync between parent and child during TM tests
- Re worded some of the commit messages and cleaned them up
- selftests/powerpc/ebb/reg.h has already moved as selftests/powerpc/reg.h
Dropped the previous patch doing the same thing
- Combined the definitions of SPRN_DSCR from dscr/ test cases
- Fixed dscr/ test cases for new SPRN_DSCR_PRIV definition available

Changes in V10:
---------------
- Rebased against the latest mainline
- Fixed couple of build failures in the test cases related to aux vector

Changes in V9:
--------------
- Fixed static build check failure after tm_orig_msr got dropped
- Fixed asm volatile construct for used registers set
- Fixed EBB, VSX, VMX tests for LE
- Fixed TAR test which was failing because of system calls
- Added checks for PPC_FEATURE2_HTM aux feature in the tests
- Fixed copyright statements

Changes in V8:
--------------
- Split the misc register set into individual ELF core notes
- Implemented support for VSX register set (on and off TM)
- Implemented support for EBB register set
- Implemented review comments on previous versions
- Some code re-arrangements, re-writes and documentation
- Added comprehensive list of test cases into selftests

Changes in V7:
--------------
- Fixed a config directive in the MISC code
- Merged the two gitignore patches into a single one

Changes in V6:
--------------
- Added two git ignore patches for powerpc selftests
- Re-formatted all in-code function definitions in kernel-doc format

Changes in V5:
--------------
- Changed flush_tmregs_to_thread, so not to take into account self tracing
- Dropped the 3rd patch in the series which had merged two functions
- Fixed one build problem for the misc debug register patch
- Accommodated almost all the review comments from Suka on the 6th patch
- Minor changes to the self test program
- Changed commit messages for some of the patches

Changes in V4:
--------------
- Added one test program into the powerpc selftest bucket in this regard
- Split the 2nd patch in the previous series into four different patches
- Accommodated most of the review comments on the previous patch series
- Added a patch to merge functions __switch_to_tm and tm_reclaim_task

Changes in V3:
--------------
- Added two new error paths in every TM related get/set functions when regset
support is not present on the system (ENODEV) or when the process does not
have any transaction active (ENODATA) in the context
- Installed the active hooks for all the newly added regset core note
types

Changes in V2:
--------------
- Removed all the power specific ptrace requests corresponding to new
NT_PPC_*
elf core note types. Now all the register sets can be accessed from
ptrace
through PTRACE_GETREGSET/PTRACE_SETREGSET using the individual
NT_PPC* core
note type instead
- Fixed couple of attribute values for REGSET_TM_CGPR register set
- Renamed flush_tmreg_to_thread as flush_tmregs_to_thread
- Fixed 32 bit checkpointed GPR support
- Changed commit messages accordingly
Anshuman Khandual (27):
elf: Add powerpc specific core note sections
powerpc/process: Add the function flush_tmregs_to_thread
powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction
powerpc/ptrace: Enable support for NT_PPC_CGPR
powerpc/ptrace: Enable support for NT_PPC_CFPR
powerpc/ptrace: Enable support for NT_PPC_CVMX
powerpc/ptrace: Enable support for NT_PPC_CVSX
powerpc/ptrace: Enable support for TM SPR state
powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR
powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR,
NT_PPC_DSCR
powerpc/ptrace: Enable support for EBB registers
powerpc/ptrace: Enable support for Performance Monitor registers
selftests/powerpc: Add more SPR numbers, TM & VMX instructions to
'reg.h'
selftests/powerpc: Use the new SPRN_DSCR_PRIV definiton
selftests/powerpc: Add ptrace tests for EBB
selftests/powerpc: Add ptrace tests for GPR/FPR registers
selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM
selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended
TM
selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR registers
selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in TM
selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM
selftests/powerpc: Add ptrace tests for VSX, VMX registers
selftests/powerpc: Add ptrace tests for VSX, VMX registers in TM
selftests/powerpc: Add ptrace tests for VSX, VMX registers in
suspended TM
selftests/powerpc: Add ptrace tests for TM SPR registers
selftests/powerpc: Add .gitignore file for ptrace executables
selftests/powerpc: Fix a build issue

arch/powerpc/include/asm/switch_to.h | 8 +
arch/powerpc/include/uapi/asm/elf.h | 5 +
arch/powerpc/kernel/process.c | 20 +
arch/powerpc/kernel/ptrace.c | 1601 +++++++++++++++++---
include/uapi/linux/elf.h | 13 +
tools/testing/selftests/powerpc/Makefile | 3 +-
.../selftests/powerpc/context_switch/cp_abort.c | 6 +-
tools/testing/selftests/powerpc/dscr/dscr.h | 10 +-
tools/testing/selftests/powerpc/ptrace/.gitignore | 11 +
tools/testing/selftests/powerpc/ptrace/Makefile | 13 +
.../testing/selftests/powerpc/ptrace/ptrace-ebb.c | 184 +++
.../testing/selftests/powerpc/ptrace/ptrace-ebb.h | 102 ++
.../testing/selftests/powerpc/ptrace/ptrace-gpr.c | 195 +++
.../testing/selftests/powerpc/ptrace/ptrace-gpr.h | 74 +
.../testing/selftests/powerpc/ptrace/ptrace-tar.c | 158 ++
.../testing/selftests/powerpc/ptrace/ptrace-tar.h | 50 +
.../selftests/powerpc/ptrace/ptrace-tm-gpr.c | 296 ++++
.../selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c | 322 ++++
.../selftests/powerpc/ptrace/ptrace-tm-spd-tar.c | 192 +++
.../selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c | 218 +++
.../selftests/powerpc/ptrace/ptrace-tm-spr.c | 175 +++
.../selftests/powerpc/ptrace/ptrace-tm-tar.c | 179 +++
.../selftests/powerpc/ptrace/ptrace-tm-vsx.c | 205 +++
.../testing/selftests/powerpc/ptrace/ptrace-vsx.c | 140 ++
.../testing/selftests/powerpc/ptrace/ptrace-vsx.h | 121 ++
tools/testing/selftests/powerpc/ptrace/ptrace.S | 396 +++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 783 ++++++++++
tools/testing/selftests/powerpc/reg.h | 42 +-
.../powerpc/tm/tm-signal-context-chk-fpu.c | 3 -
.../powerpc/tm/tm-signal-context-chk-gpr.c | 3 -
.../powerpc/tm/tm-signal-context-chk-vmx.c | 3 -
.../powerpc/tm/tm-signal-context-chk-vsx.c | 3 -
.../selftests/powerpc/tm/tm-signal-context-chk.c | 3 -
33 files changed, 5338 insertions(+), 199 deletions(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/.gitignore
create mode 100644 tools/testing/selftests/powerpc/ptrace/Makefile
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-ebb.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-ebb.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tar.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tar.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-vsx.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace.S
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace.h

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1.8.3.1