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[PATCHv13,2/9] coresight: etm4x: Use asm-generic IO memory barriers

Message ID 0d76de0ecc0aa7cb01fd8b8863a8e567abd4410b.1651149615.git.quic_saipraka@quicinc.com
State Superseded
Headers show
Series lib/rwmmio/arm64: Add support to trace register reads/writes | expand

Commit Message

Sai Prakash Ranjan April 28, 2022, 12:44 p.m. UTC 
Per discussion in [1], it was decided to move to using architecture
independent/asm-generic IO memory barriers to have just one set of
them and deprecate use of arm64 specific IO memory barriers in driver
code. So replace current usage of __io_rmb()/__iowmb() in drivers to
__io_ar()/__io_bw().

[1] https://lore.kernel.org/lkml/CAK8P3a0L2tLeF1Q0+0ijUxhGNaw+Z0fyPC1oW6_ELQfn0=i4iw@mail.gmail.com/

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/hwtracing/coresight/coresight-etm4x-core.c | 8 ++++----
 drivers/hwtracing/coresight/coresight-etm4x.h      | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 7f416a12000e..81c0faf45b28 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -98,7 +98,7 @@  u64 etm4x_sysreg_read(u32 offset, bool _relaxed, bool _64bit)
 	}
 
 	if (!_relaxed)
-		__iormb(res);	/* Imitate the !relaxed I/O helpers */
+		__io_ar(res);	/* Imitate the !relaxed I/O helpers */
 
 	return res;
 }
@@ -106,7 +106,7 @@  u64 etm4x_sysreg_read(u32 offset, bool _relaxed, bool _64bit)
 void etm4x_sysreg_write(u64 val, u32 offset, bool _relaxed, bool _64bit)
 {
 	if (!_relaxed)
-		__iowmb();	/* Imitate the !relaxed I/O helpers */
+		__io_bw();	/* Imitate the !relaxed I/O helpers */
 	if (!_64bit)
 		val &= GENMASK(31, 0);
 
@@ -130,7 +130,7 @@  static u64 ete_sysreg_read(u32 offset, bool _relaxed, bool _64bit)
 	}
 
 	if (!_relaxed)
-		__iormb(res);	/* Imitate the !relaxed I/O helpers */
+		__io_ar(res);	/* Imitate the !relaxed I/O helpers */
 
 	return res;
 }
@@ -138,7 +138,7 @@  static u64 ete_sysreg_read(u32 offset, bool _relaxed, bool _64bit)
 static void ete_sysreg_write(u64 val, u32 offset, bool _relaxed, bool _64bit)
 {
 	if (!_relaxed)
-		__iowmb();	/* Imitate the !relaxed I/O helpers */
+		__io_bw();	/* Imitate the !relaxed I/O helpers */
 	if (!_64bit)
 		val &= GENMASK(31, 0);
 
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h
index 3c4d69b096ca..f54698731582 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.h
+++ b/drivers/hwtracing/coresight/coresight-etm4x.h
@@ -448,14 +448,14 @@ 
 #define etm4x_read32(csa, offset)					\
 	({								\
 		u32 __val = etm4x_relaxed_read32((csa), (offset));	\
-		__iormb(__val);						\
+		__io_ar(__val);						\
 		__val;							\
 	 })
 
 #define etm4x_read64(csa, offset)					\
 	({								\
 		u64 __val = etm4x_relaxed_read64((csa), (offset));	\
-		__iormb(__val);						\
+		__io_ar(__val);						\
 		__val;							\
 	 })
 
@@ -479,13 +479,13 @@ 
 
 #define etm4x_write32(csa, val, offset)					\
 	do {								\
-		__iowmb();						\
+		__io_bw();						\
 		etm4x_relaxed_write32((csa), (val), (offset));		\
 	} while (0)
 
 #define etm4x_write64(csa, val, offset)					\
 	do {								\
-		__iowmb();						\
+		__io_bw();						\
 		etm4x_relaxed_write64((csa), (val), (offset));		\
 	} while (0)