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| author | Ravi Bangoria <ravi.bangoria@linux.ibm.com> | 2020-05-14 14:17:34 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-18 17:11:05 +0300 |
| commit | 303e6a9ddcdc168e92253c78cdb4bbe1e10d78b3 (patch) | |
| tree | 34b745bd6743e2c20343f077e943657dce3e6a0a /arch/powerpc/kernel/signal.c | |
| parent | 22a214e461c5cc9428b86915d9cfcf84c6e11ad7 (diff) | |
| download | linux-303e6a9ddcdc168e92253c78cdb4bbe1e10d78b3.tar.xz | |
powerpc/watchpoint: Convert thread_struct->hw_brk to an array
So far powerpc hw supported only one watchpoint. But Power10 is
introducing 2nd DAWR. Convert thread_struct->hw_brk into an array.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Link: https://lore.kernel.org/r/20200514111741.97993-10-ravi.bangoria@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/signal.c')
| -rw-r--r-- | arch/powerpc/kernel/signal.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index 8e29138a344a..b4143b6ff093 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -265,15 +265,20 @@ static void do_signal(struct task_struct *tsk) return; /* no signals delivered */ } -#ifndef CONFIG_PPC_ADV_DEBUG_REGS /* * Reenable the DABR before delivering the signal to * user space. The DABR will have been cleared if it * triggered inside the kernel. */ - if (tsk->thread.hw_brk.address && tsk->thread.hw_brk.type) - __set_breakpoint(0, &tsk->thread.hw_brk); -#endif + if (!IS_ENABLED(CONFIG_PPC_ADV_DEBUG_REGS)) { + int i; + + for (i = 0; i < nr_wp_slots(); i++) { + if (tsk->thread.hw_brk[i].address && tsk->thread.hw_brk[i].type) + __set_breakpoint(i, &tsk->thread.hw_brk[i]); + } + } + /* Re-enable the breakpoints for the signal stack */ thread_change_pc(tsk, tsk->thread.regs); |