linux-kernel - Re: [PATCH v6 0/8] powerpc/watchpoint: Bug fixes plus new feature flag

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Date:   Thu, 17 Sep 2020 21:27:29 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        christophe.leroy@....fr, mpe@...erman.id.au
Cc:     mikey@...ling.org, pedromfc@...ux.ibm.com, paulus@...ba.org,
        naveen.n.rao@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org,
        rogealve@...ux.ibm.com, jniethe5@...il.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 0/8] powerpc/watchpoint: Bug fixes plus new feature flag

On Wed, 2 Sep 2020 09:59:37 +0530, Ravi Bangoria wrote:
> 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.
> 
> [...]

Applied to powerpc/next.

[1/8] powerpc/watchpoint: Fix quadword instruction handling on p10 predecessors
      https://git.kernel.org/powerpc/c/4759c11ed20454b7b36db4ec15f7d5aa1519af4a
[2/8] powerpc/watchpoint: Fix handling of vector instructions
      https://git.kernel.org/powerpc/c/4441eb02333a9b46a0d919aa7a6d3b137b5f2562
[3/8] powerpc/watchpoint/ptrace: Fix SETHWDEBUG when CONFIG_HAVE_HW_BREAKPOINT=N
      https://git.kernel.org/powerpc/c/9b6b7c680cc20971444d9f836e49fc98848bcd0a
[4/8] powerpc/watchpoint: Move DAWR detection logic outside of hw_breakpoint.c
      https://git.kernel.org/powerpc/c/edc8dd99b29e4d705c45e2a3a6c01b096ee056db
[5/8] powerpc/watchpoint: Fix exception handling for CONFIG_HAVE_HW_BREAKPOINT=N
      https://git.kernel.org/powerpc/c/5b905d77987de065bdd3a2906816b5f143df087b
[6/8] powerpc/watchpoint: Add hw_len wherever missing
      https://git.kernel.org/powerpc/c/58da5984d2ea6d95f3f9d9e8dd9f7e1b0dddfb3c
[7/8] powerpc/watchpoint/ptrace: Introduce PPC_DEBUG_FEATURE_DATA_BP_ARCH_31
      https://git.kernel.org/powerpc/c/fa725cc53d353110f39a9e5b9f60d6acb2c7ff49
[8/8] selftests/powerpc: Tests for kernel accessing user memory
      https://git.kernel.org/powerpc/c/ac234524056da4e0c081f682da3ea25cdaab737a

cheers