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

[Ravi Bangoria]

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 at 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 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 */
-- 
2.26.2