diff mbox series

[7/7] powerpc/watchpoint: Remove 512 byte boundary

Message ID 20200602040106.127693-8-ravi.bangoria@linux.ibm.com (mailing list archive)
State Superseded
Headers show
Series powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/merge (00ec79b0b767994422c43792d73ff1327714a73f)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/next (30df74d67d48949da87e3a5b57c381763e8fd526)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch linus/master (f359287765c04711ff54fbd11645271d8e5ff763)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/fixes (2f26ed1764b42a8c40d9c48441c73a70d805decf)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch linux-next (e7b08814b16b80a0bf76eeca16317f8c2ed23b8c)
snowpatch_ozlabs/apply_patch fail Failed to apply to any branch

Commit Message

Ravi Bangoria June 2, 2020, 4:01 a.m. UTC 
Power10 has removed 512 bytes boundary from match criteria. i.e. The match
range can be 512 bytes unaligned as well.

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 mbox series

Patch

diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index 0000daf0e1da..270e655108f4 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(start_addr, SZ_512M) != ALIGN(end_addr - 1, SZ_512M))
+		/* DAWR region can't cross 512 bytes boundary on p8 and p9 */
+		if (!cpu_has_feature(CPU_FTR_ARCH_31) &&
+		    (ALIGN(start_addr, SZ_512M) != ALIGN(end_addr - 1, SZ_512M)))
 			return -EINVAL;
 	} else if (IS_ENABLED(CONFIG_PPC_8xx)) {
 		/* 8xx can setup a range without limitation */