From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: mpe@ellerman.id.au, mikey@neuling.org
Cc: apopple@linux.ibm.com, ravi.bangoria@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: [PATCH v4 04/16] powerpc/watchpoint/ptrace: Return actual num of available watchpoints
Date: Thu, 30 Apr 2020 10:04:05 +0530 [thread overview]
Message-ID: <20200430043417.30948-5-ravi.bangoria@linux.ibm.com> (raw)
In-Reply-To: <20200430043417.30948-1-ravi.bangoria@linux.ibm.com>
User can ask for num of available watchpoints(dbginfo.num_data_bps)
using ptrace(PPC_PTRACE_GETHWDBGINFO). Return actual number of
available watchpoints on the machine rather than hardcoded 1.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Reviewed-by: Michael Neuling <mikey@neuling.org>
---
arch/powerpc/kernel/ptrace/ptrace-noadv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/ptrace/ptrace-noadv.c b/arch/powerpc/kernel/ptrace/ptrace-noadv.c
index f87e7c5c3bf3..12962302d6a4 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-noadv.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-noadv.c
@@ -44,7 +44,7 @@ void ppc_gethwdinfo(struct ppc_debug_info *dbginfo)
dbginfo->version = 1;
dbginfo->num_instruction_bps = 0;
if (ppc_breakpoint_available())
- dbginfo->num_data_bps = 1;
+ dbginfo->num_data_bps = nr_wp_slots();
else
dbginfo->num_data_bps = 0;
dbginfo->num_condition_regs = 0;
--
2.21.1
next prev parent reply other threads:[~2020-04-30 4:44 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-30 4:34 [PATCH v4 00/16] powerpc/watchpoint: Preparation for more than one watchpoint Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 01/16] powerpc/watchpoint: Rename current DAWR macros Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 02/16] powerpc/watchpoint: Add SPRN macros for second DAWR Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 03/16] powerpc/watchpoint: Introduce function to get nr watchpoints dynamically Ravi Bangoria
2020-04-30 4:34 ` Ravi Bangoria [this message]
2020-04-30 4:34 ` [PATCH v4 05/16] powerpc/watchpoint: Provide DAWR number to set_dawr Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 06/16] powerpc/watchpoint: Provide DAWR number to __set_breakpoint Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 07/16] powerpc/watchpoint: Get watchpoint count dynamically while disabling them Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 08/16] powerpc/watchpoint: Disable all available watchpoints when !dawr_force_enable Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 09/16] powerpc/watchpoint: Convert thread_struct->hw_brk to an array Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 10/16] powerpc/watchpoint: Use loop for thread_struct->ptrace_bps Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 11/16] powerpc/watchpoint: Introduce is_ptrace_bp() function Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 12/16] powerpc/watchpoint: Use builtin ALIGN*() macros Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 13/16] powerpc/watchpoint: Prepare handler to handle more than one watcnhpoint Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 14/16] powerpc/watchpoint: Don't allow concurrent perf and ptrace events Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 15/16] powerpc/watchpoint/xmon: Don't allow breakpoint overwriting Ravi Bangoria
2020-04-30 4:34 ` [PATCH v4 16/16] powerpc/watchpoint/xmon: Support 2nd dawr Ravi Bangoria
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