From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: mpe@ellerman.id.au, christophe.leroy@c-s.fr
Cc: ravi.bangoria@linux.ibm.com, mikey@neuling.org,
jniethe5@gmail.com, pedromfc@linux.ibm.com,
linux-kernel@vger.kernel.org, paulus@samba.org,
rogealve@linux.ibm.com, naveen.n.rao@linux.vnet.ibm.com,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v6 0/8] powerpc/watchpoint: Bug fixes plus new feature flag
Date: Wed, 2 Sep 2020 09:59:37 +0530 [thread overview]
Message-ID: <20200902042945.129369-1-ravi.bangoria@linux.ibm.com> (raw)
Patch #1 fixes issue for quardword instruction on p10 predecessors.
Patch #2 fixes issue for vector instructions.
Patch #3 fixes a bug about watchpoint not firing when created with
ptrace PPC_PTRACE_SETHWDEBUG and CONFIG_HAVE_HW_BREAKPOINT=N.
The fix uses HW_BRK_TYPE_PRIV_ALL for ptrace user which, I
guess, should be fine because we don't leak any kernel
addresses and PRIV_ALL will also help to cover scenarios when
kernel accesses user memory.
Patch #4,#5 fixes infinite exception bug, again the bug happens only
with CONFIG_HAVE_HW_BREAKPOINT=N.
Patch #6 fixes two places where we are missing to set hw_len.
Patch #7 introduce new feature bit PPC_DEBUG_FEATURE_DATA_BP_ARCH_31
which will be set when running on ISA 3.1 compliant machine.
Patch #8 finally adds selftest to test scenarios fixed by patch#2,#3
and also moves MODE_EXACT tests outside of BP_RANGE condition.
Christophe, let me know if this series breaks something for 8xx.
v5: https://lore.kernel.org/r/20200825043617.1073634-1-ravi.bangoria@linux.ibm.com
v5->v6:
- Fix build faulure reported by kernel test robot
- patch #5. Use more compact if condition, suggested by Christophe
Ravi Bangoria (8):
powerpc/watchpoint: Fix quarword instruction handling on p10
predecessors
powerpc/watchpoint: Fix handling of vector instructions
powerpc/watchpoint/ptrace: Fix SETHWDEBUG when
CONFIG_HAVE_HW_BREAKPOINT=N
powerpc/watchpoint: Move DAWR detection logic outside of
hw_breakpoint.c
powerpc/watchpoint: Fix exception handling for
CONFIG_HAVE_HW_BREAKPOINT=N
powerpc/watchpoint: Add hw_len wherever missing
powerpc/watchpoint/ptrace: Introduce PPC_DEBUG_FEATURE_DATA_BP_ARCH_31
powerpc/watchpoint/selftests: Tests for kernel accessing user memory
Documentation/powerpc/ptrace.rst | 1 +
arch/powerpc/include/asm/hw_breakpoint.h | 12 ++
arch/powerpc/include/uapi/asm/ptrace.h | 1 +
arch/powerpc/kernel/Makefile | 3 +-
arch/powerpc/kernel/hw_breakpoint.c | 149 +---------------
.../kernel/hw_breakpoint_constraints.c | 162 ++++++++++++++++++
arch/powerpc/kernel/process.c | 48 ++++++
arch/powerpc/kernel/ptrace/ptrace-noadv.c | 9 +-
arch/powerpc/xmon/xmon.c | 1 +
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 48 +++++-
10 files changed, 282 insertions(+), 152 deletions(-)
create mode 100644 arch/powerpc/kernel/hw_breakpoint_constraints.c
--
2.26.2
next reply other threads:[~2020-09-02 4:32 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-02 4:29 Ravi Bangoria [this message]
2020-09-02 4:29 ` [PATCH v6 1/8] powerpc/watchpoint: Fix quarword instruction handling on p10 predecessors Ravi Bangoria
2020-09-17 13:25 ` Rogerio Alves
2020-09-02 4:29 ` [PATCH v6 2/8] powerpc/watchpoint: Fix handling of vector instructions Ravi Bangoria
2020-09-17 13:25 ` Rogerio Alves
2020-09-02 4:29 ` [PATCH v6 3/8] powerpc/watchpoint/ptrace: Fix SETHWDEBUG when CONFIG_HAVE_HW_BREAKPOINT=N Ravi Bangoria
2020-09-17 13:25 ` Rogerio Alves
2020-09-02 4:29 ` [PATCH v6 4/8] powerpc/watchpoint: Move DAWR detection logic outside of hw_breakpoint.c Ravi Bangoria
2020-09-17 13:25 ` Rogerio Alves
2020-09-02 4:29 ` [PATCH v6 5/8] powerpc/watchpoint: Fix exception handling for CONFIG_HAVE_HW_BREAKPOINT=N Ravi Bangoria
2020-09-17 13:25 ` Rogerio Alves
2020-09-02 4:29 ` [PATCH v6 6/8] powerpc/watchpoint: Add hw_len wherever missing Ravi Bangoria
2020-09-17 13:26 ` Rogerio Alves
2020-09-02 4:29 ` [PATCH v6 7/8] powerpc/watchpoint/ptrace: Introduce PPC_DEBUG_FEATURE_DATA_BP_ARCH_31 Ravi Bangoria
2020-09-17 13:26 ` Rogerio Alves
2020-09-02 4:29 ` [PATCH v6 8/8] powerpc/watchpoint/selftests: Tests for kernel accessing user memory Ravi Bangoria
2020-09-17 13:26 ` Rogerio Alves
2020-09-17 11:27 ` [PATCH v6 0/8] powerpc/watchpoint: Bug fixes plus new feature flag Michael Ellerman
2020-09-17 13:24 ` Rogerio Alves
2020-09-18 8:31 ` Ravi Bangoria
2020-09-18 10:50 ` Michael Ellerman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200902042945.129369-1-ravi.bangoria@linux.ibm.com \
--to=ravi.bangoria@linux.ibm.com \
--cc=christophe.leroy@c-s.fr \
--cc=jniethe5@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mikey@neuling.org \
--cc=mpe@ellerman.id.au \
--cc=naveen.n.rao@linux.vnet.ibm.com \
--cc=paulus@samba.org \
--cc=pedromfc@linux.ibm.com \
--cc=rogealve@linux.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).