From 45093b382e0ac25c206b4dcd210c6be1f5e56e60 Mon Sep 17 00:00:00 2001
From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Date: Thu, 14 May 2020 16:47:29 +0530
Subject: [PATCH] powerpc/watchpoint/ptrace: Return actual num of available
watchpoints
References: jsc#SLE-12936
Patch-mainline: v5.8-rc1
Git-commit: 45093b382e0ac25c206b4dcd210c6be1f5e56e60
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>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Link: https://lore.kernel.org/r/20200514111741.97993-5-ravi.bangoria@linux.ibm.com
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
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;
--
2.28.0