From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: mpe@ellerman.id.au, mikey@neuling.org
Cc: apopple@linux.ibm.com, paulus@samba.org, npiggin@gmail.com,
christophe.leroy@c-s.fr, naveen.n.rao@linux.vnet.ibm.com,
peterz@infradead.org, jolsa@kernel.org, oleg@redhat.com,
fweisbec@gmail.com, mingo@kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
ravi.bangoria@linux.ibm.com
Subject: [PATCH v6 11/16] powerpc/watchpoint: Introduce is_ptrace_bp() function
Date: Thu, 14 May 2020 16:47:36 +0530 [thread overview]
Message-ID: <20200514111741.97993-12-ravi.bangoria@linux.ibm.com> (raw)
In-Reply-To: <20200514111741.97993-1-ravi.bangoria@linux.ibm.com>
Introduce is_ptrace_bp() function and move the check inside the
function. It will be utilize more in later set of patches.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Reviewed-by: Michael Neuling <mikey@neuling.org>
---
arch/powerpc/kernel/hw_breakpoint.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index 917cca73dbc3..8028a2704874 100644
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c
@@ -91,6 +91,11 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp)
hw_breakpoint_disable();
}
+static bool is_ptrace_bp(struct perf_event *bp)
+{
+ return bp->overflow_handler == ptrace_triggered;
+}
+
/*
* Perform cleanup of arch-specific counters during unregistration
* of the perf-event
@@ -325,7 +330,7 @@ int hw_breakpoint_handler(struct die_args *args)
* one-shot mode. The ptrace-ed process will receive the SIGTRAP signal
* generated in do_dabr().
*/
- if (bp->overflow_handler == ptrace_triggered) {
+ if (is_ptrace_bp(bp)) {
perf_bp_event(bp, regs);
rc = NOTIFY_DONE;
goto out;
--
2.26.2
next prev parent reply other threads:[~2020-05-14 11:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-14 11:17 [PATCH v6 00/16] powerpc/watchpoint: Preparation for more than one watchpoint Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 01/16] powerpc/watchpoint: Rename current DAWR macros Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 02/16] powerpc/watchpoint: Add SPRN macros for second DAWR Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 03/16] powerpc/watchpoint: Introduce function to get nr watchpoints dynamically Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 04/16] powerpc/watchpoint/ptrace: Return actual num of available watchpoints Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 05/16] powerpc/watchpoint: Provide DAWR number to set_dawr Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 06/16] powerpc/watchpoint: Provide DAWR number to __set_breakpoint Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 07/16] powerpc/watchpoint: Get watchpoint count dynamically while disabling them Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 08/16] powerpc/watchpoint: Disable all available watchpoints when !dawr_force_enable Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 09/16] powerpc/watchpoint: Convert thread_struct->hw_brk to an array Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 10/16] powerpc/watchpoint: Use loop for thread_struct->ptrace_bps Ravi Bangoria
2020-05-14 11:17 ` Ravi Bangoria [this message]
2020-05-14 11:17 ` [PATCH v6 12/16] powerpc/watchpoint: Use builtin ALIGN*() macros Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 13/16] powerpc/watchpoint: Prepare handler to handle more than one watcnhpoint Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 14/16] powerpc/watchpoint: Don't allow concurrent perf and ptrace events Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 15/16] powerpc/watchpoint/xmon: Don't allow breakpoint overwriting Ravi Bangoria
2020-05-14 11:17 ` [PATCH v6 16/16] powerpc/watchpoint/xmon: Support 2nd DAWR Ravi Bangoria
2020-05-20 11:00 ` [PATCH v6 00/16] powerpc/watchpoint: Preparation for more than one watchpoint Michael Ellerman
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