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Date: Tue, 25 Aug 2020 10:06:15 +0530 From: Ravi Bangoria <ravi.bangoria@...ux.ibm.com> To: mpe@...erman.id.au, christophe.leroy@....fr Cc: ravi.bangoria@...ux.ibm.com, mikey@...ling.org, paulus@...ba.org, naveen.n.rao@...ux.vnet.ibm.com, pedromfc@...ux.ibm.com, rogealve@...ux.ibm.com, jniethe5@...il.com, linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org Subject: [PATCH v5 6/8] powerpc/watchpoint: Add hw_len wherever missing There are couple of places where we set len but not hw_len. For ptrace/perf watchpoints, when CONFIG_HAVE_HW_BREAKPOINT=Y, hw_len will be calculated and set internally while parsing watchpoint. But when CONFIG_HAVE_HW_BREAKPOINT=N, we need to manually set 'hw_len'. Similarly for xmon as well, hw_len needs to be set directly. Fixes: b57aeab811db ("powerpc/watchpoint: Fix length calculation for unaligned target") Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.ibm.com> --- arch/powerpc/kernel/ptrace/ptrace-noadv.c | 1 + arch/powerpc/xmon/xmon.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/powerpc/kernel/ptrace/ptrace-noadv.c b/arch/powerpc/kernel/ptrace/ptrace-noadv.c index 866597b407bc..081c39842d84 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-noadv.c +++ b/arch/powerpc/kernel/ptrace/ptrace-noadv.c @@ -219,6 +219,7 @@ long ppc_set_hwdebug(struct task_struct *child, struct ppc_hw_breakpoint *bp_inf brk.address = ALIGN_DOWN(bp_info->addr, HW_BREAKPOINT_SIZE); brk.type = HW_BRK_TYPE_TRANSLATE | HW_BRK_TYPE_PRIV_ALL; brk.len = DABR_MAX_LEN; + brk.hw_len = DABR_MAX_LEN; if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ) brk.type |= HW_BRK_TYPE_READ; if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE) diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index df7bca00f5ec..55c43a6c9111 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -969,6 +969,7 @@ static void insert_cpu_bpts(void) brk.address = dabr[i].address; brk.type = (dabr[i].enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL; brk.len = 8; + brk.hw_len = 8; __set_breakpoint(i, &brk); } } -- 2.26.2
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