From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: mpe@ellerman.id.au, mikey@neuling.org
Cc: christophe.leroy@c-s.fr, ravi.bangoria@linux.ibm.com,
apopple@linux.ibm.com, peterz@infradead.org, fweisbec@gmail.com,
miltonm@us.ibm.com, oleg@redhat.com, npiggin@gmail.com,
linux-kernel@vger.kernel.org, paulus@samba.org, jolsa@kernel.org,
pedromfc@br.ibm.com, naveen.n.rao@linux.vnet.ibm.com,
linuxppc-dev@lists.ozlabs.org, mingo@kernel.org
Subject: [PATCH v3 9/9] powerpc/watchpoint: Remove 512 byte boundary
Date: Wed, 8 Jul 2020 10:20:46 +0530 [thread overview]
Message-ID: <20200708045046.135702-10-ravi.bangoria@linux.ibm.com> (raw)
In-Reply-To: <20200708045046.135702-1-ravi.bangoria@linux.ibm.com>
Power10 has removed 512 bytes boundary from match criteria. i.e. The watch
range can cross 512 bytes boundary.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
arch/powerpc/kernel/hw_breakpoint.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index 7a66c370a105..270fbb4d01ce 100644
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c
@@ -418,8 +418,9 @@ static int hw_breakpoint_validate_len(struct arch_hw_breakpoint *hw)
if (dawr_enabled()) {
max_len = DAWR_MAX_LEN;
- /* DAWR region can't cross 512 bytes boundary */
- if (ALIGN_DOWN(start_addr, SZ_512) != ALIGN_DOWN(end_addr - 1, SZ_512))
+ /* DAWR region can't cross 512 bytes boundary on p10 predecessors */
+ if (!cpu_has_feature(CPU_FTR_ARCH_31) &&
+ (ALIGN_DOWN(start_addr, SZ_512) != ALIGN_DOWN(end_addr - 1, SZ_512)))
return -EINVAL;
} else if (IS_ENABLED(CONFIG_PPC_8xx)) {
/* 8xx can setup a range without limitation */
--
2.26.2
prev parent reply other threads:[~2020-07-08 5:12 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 4:50 [PATCH v3 0/9] powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 1/9] powerpc/watchpoint: Fix 512 byte boundary limit Ravi Bangoria
2020-07-08 7:44 ` Jordan Niethe
2020-07-08 7:52 ` Christophe Leroy
2020-07-15 1:01 ` Jordan Niethe
2020-07-08 4:50 ` [PATCH v3 2/9] powerpc/watchpoint: Fix DAWR exception constraint Ravi Bangoria
2020-07-15 2:19 ` Jordan Niethe
2020-07-15 4:08 ` Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 3/9] powerpc/watchpoint: Enable watchpoint functionality on power10 guest Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 4/9] powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 5/9] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 6/9] powerpc/watchpoint: Rename current H_SET_MODE DAWR macro Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 7/9] powerpc/watchpoint: Guest support for 2nd DAWR hcall Ravi Bangoria
2020-07-08 4:50 ` [PATCH v3 8/9] powerpc/watchpoint: Return available watchpoints dynamically Ravi Bangoria
2020-07-08 4:50 ` Ravi Bangoria [this message]
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