From: Christophe Leroy <christophe.leroy@c-s.fr> To: Ravi Bangoria <ravi.bangoria@linux.ibm.com>, mpe@ellerman.id.au, mikey@neuling.org Cc: apopple@linux.ibm.com, paulus@samba.org, npiggin@gmail.com, 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 Subject: Re: [PATCH v2 07/16] powerpc/watchpoint: Get watchpoint count dynamically while disabling them Date: Wed, 1 Apr 2020 08:32:00 +0200 [thread overview] Message-ID: <3c2312bb-9689-830e-3bc8-c828eddf369c@c-s.fr> (raw) In-Reply-To: <20200401061309.92442-8-ravi.bangoria@linux.ibm.com> Le 01/04/2020 à 08:13, Ravi Bangoria a écrit : > Instead of disabling only one watchpoint, get num of available > watchpoints dynamically and disable all of them. > > Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> > --- > arch/powerpc/include/asm/hw_breakpoint.h | 15 +++++++-------- > 1 file changed, 7 insertions(+), 8 deletions(-) > > diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h > index 4e4976c3248b..fae33c729ba9 100644 > --- a/arch/powerpc/include/asm/hw_breakpoint.h > +++ b/arch/powerpc/include/asm/hw_breakpoint.h > @@ -78,14 +78,13 @@ extern void ptrace_triggered(struct perf_event *bp, > struct perf_sample_data *data, struct pt_regs *regs); > static inline void hw_breakpoint_disable(void) > { > - struct arch_hw_breakpoint brk; > - > - brk.address = 0; > - brk.type = 0; > - brk.len = 0; > - brk.hw_len = 0; > - if (ppc_breakpoint_available()) > - __set_breakpoint(&brk, 0); > + int i; > + struct arch_hw_breakpoint null_brk = {0}; Those declaration should be in the block unsigned them below. > + > + if (ppc_breakpoint_available()) { > + for (i = 0; i < nr_wp_slots(); i++) > + __set_breakpoint(&null_brk, i); > + } I would have had a preference to the following, but that's detail I guess: int i; struct arch_hw_breakpoint null_brk = {0}; if (!ppc_breakpoint_available()) return; for (i = 0; i < nr_wp_slots(); i++) __set_breakpoint(&null_brk, i); > } > extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs); > int hw_breakpoint_handler(struct die_args *args); > Christophe
WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@c-s.fr> To: Ravi Bangoria <ravi.bangoria@linux.ibm.com>, mpe@ellerman.id.au, mikey@neuling.org Cc: apopple@linux.ibm.com, peterz@infradead.org, fweisbec@gmail.com, oleg@redhat.com, npiggin@gmail.com, linux-kernel@vger.kernel.org, paulus@samba.org, jolsa@kernel.org, naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, mingo@kernel.org Subject: Re: [PATCH v2 07/16] powerpc/watchpoint: Get watchpoint count dynamically while disabling them Date: Wed, 1 Apr 2020 08:32:00 +0200 [thread overview] Message-ID: <3c2312bb-9689-830e-3bc8-c828eddf369c@c-s.fr> (raw) In-Reply-To: <20200401061309.92442-8-ravi.bangoria@linux.ibm.com> Le 01/04/2020 à 08:13, Ravi Bangoria a écrit : > Instead of disabling only one watchpoint, get num of available > watchpoints dynamically and disable all of them. > > Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> > --- > arch/powerpc/include/asm/hw_breakpoint.h | 15 +++++++-------- > 1 file changed, 7 insertions(+), 8 deletions(-) > > diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h > index 4e4976c3248b..fae33c729ba9 100644 > --- a/arch/powerpc/include/asm/hw_breakpoint.h > +++ b/arch/powerpc/include/asm/hw_breakpoint.h > @@ -78,14 +78,13 @@ extern void ptrace_triggered(struct perf_event *bp, > struct perf_sample_data *data, struct pt_regs *regs); > static inline void hw_breakpoint_disable(void) > { > - struct arch_hw_breakpoint brk; > - > - brk.address = 0; > - brk.type = 0; > - brk.len = 0; > - brk.hw_len = 0; > - if (ppc_breakpoint_available()) > - __set_breakpoint(&brk, 0); > + int i; > + struct arch_hw_breakpoint null_brk = {0}; Those declaration should be in the block unsigned them below. > + > + if (ppc_breakpoint_available()) { > + for (i = 0; i < nr_wp_slots(); i++) > + __set_breakpoint(&null_brk, i); > + } I would have had a preference to the following, but that's detail I guess: int i; struct arch_hw_breakpoint null_brk = {0}; if (!ppc_breakpoint_available()) return; for (i = 0; i < nr_wp_slots(); i++) __set_breakpoint(&null_brk, i); > } > extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs); > int hw_breakpoint_handler(struct die_args *args); > Christophe
next prev parent reply other threads:[~2020-04-01 6:32 UTC|newest] Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-01 6:12 [PATCH v2 00/16] powerpc/watchpoint: Preparation for more than one watchpoint Ravi Bangoria 2020-04-01 6:12 ` Ravi Bangoria 2020-04-01 6:12 ` [PATCH v2 01/16] powerpc/watchpoint: Rename current DAWR macros Ravi Bangoria 2020-04-01 6:12 ` Ravi Bangoria 2020-04-01 6:12 ` [PATCH v2 02/16] powerpc/watchpoint: Add SPRN macros for second DAWR Ravi Bangoria 2020-04-01 6:12 ` Ravi Bangoria 2020-04-01 6:12 ` [PATCH v2 03/16] powerpc/watchpoint: Introduce function to get nr watchpoints dynamically Ravi Bangoria 2020-04-01 6:12 ` Ravi Bangoria 2020-04-01 6:29 ` Christophe Leroy 2020-04-01 6:29 ` Christophe Leroy 2020-04-01 6:50 ` Ravi Bangoria 2020-04-01 6:50 ` Ravi Bangoria 2020-04-01 7:05 ` Christophe Leroy 2020-04-01 7:05 ` Christophe Leroy 2020-04-01 6:12 ` [PATCH v2 04/16] powerpc/watchpoint/ptrace: Return actual num of available watchpoints Ravi Bangoria 2020-04-01 6:12 ` Ravi Bangoria 2020-04-01 6:12 ` [PATCH v2 05/16] powerpc/watchpoint: Provide DAWR number to set_dawr Ravi Bangoria 2020-04-01 6:12 ` Ravi Bangoria 2020-04-01 7:03 ` Christophe Leroy 2020-04-01 7:03 ` Christophe Leroy 2020-04-01 6:12 ` [PATCH v2 06/16] powerpc/watchpoint: Provide DAWR number to __set_breakpoint Ravi Bangoria 2020-04-01 6:12 ` Ravi Bangoria 2020-04-01 7:03 ` Christophe Leroy 2020-04-01 7:03 ` Christophe Leroy 2020-04-01 8:57 ` Ravi Bangoria 2020-04-01 8:57 ` Ravi Bangoria 2020-04-01 9:11 ` Christophe Leroy 2020-04-01 9:11 ` Christophe Leroy 2020-04-01 9:44 ` Christophe Leroy 2020-04-01 9:44 ` Christophe Leroy 2020-04-01 6:13 ` [PATCH v2 07/16] powerpc/watchpoint: Get watchpoint count dynamically while disabling them Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:32 ` Christophe Leroy [this message] 2020-04-01 6:32 ` Christophe Leroy 2020-04-01 9:19 ` Ravi Bangoria 2020-04-01 9:19 ` Ravi Bangoria 2020-04-01 6:13 ` [PATCH v2 08/16] powerpc/watchpoint: Disable all available watchpoints when !dawr_force_enable Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:33 ` Christophe Leroy 2020-04-01 6:33 ` Christophe Leroy 2020-04-01 9:00 ` Ravi Bangoria 2020-04-01 9:00 ` Ravi Bangoria 2020-04-01 6:13 ` [PATCH v2 09/16] powerpc/watchpoint: Convert thread_struct->hw_brk to an array Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:43 ` Christophe Leroy 2020-04-01 6:43 ` Christophe Leroy 2020-04-01 9:06 ` Ravi Bangoria 2020-04-01 9:06 ` Ravi Bangoria 2020-04-01 6:13 ` [PATCH v2 10/16] powerpc/watchpoint: Use loop for thread_struct->ptrace_bps Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:13 ` [PATCH v2 11/16] powerpc/watchpoint: Introduce is_ptrace_bp() function Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:13 ` [PATCH v2 12/16] powerpc/watchpoint: Use builtin ALIGN*() macros Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:13 ` [PATCH v2 13/16] powerpc/watchpoint: Prepare handler to handle more than one watcnhpoint Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:50 ` Christophe Leroy 2020-04-01 6:50 ` Christophe Leroy 2020-04-01 9:13 ` Ravi Bangoria 2020-04-01 9:13 ` Ravi Bangoria 2020-04-01 9:20 ` Christophe Leroy 2020-04-01 9:20 ` Christophe Leroy 2020-04-01 9:23 ` Ravi Bangoria 2020-04-01 9:23 ` Ravi Bangoria 2020-04-01 6:13 ` [PATCH v2 14/16] powerpc/watchpoint: Don't allow concurrent perf and ptrace events Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:52 ` Christophe Leroy 2020-04-01 6:52 ` Christophe Leroy 2020-04-01 6:13 ` [PATCH v2 15/16] powerpc/watchpoint/xmon: Don't allow breakpoint overwriting Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria 2020-04-01 6:13 ` [PATCH v2 16/16] powerpc/watchpoint/xmon: Support 2nd dawr Ravi Bangoria 2020-04-01 6:13 ` Ravi Bangoria
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