Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Sai Prakash Ranjan <quic_saipraka@quicinc.com>
To:     Will Deacon <will@kernel.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Steven Rostedt <rostedt@goodmis.org>,
        "Marc Zyngier" <maz@kernel.org>
CC:     Trilok Soni <quic_tsoni@quicinc.com>, <quic_psodagud@quicinc.com>,
        gregkh <gregkh@linuxfoundation.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
        "Sai Prakash Ranjan" <quic_saipraka@quicinc.com>,
        Mathieu Poirier <mathieu.poirier@linaro.org>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Mike Leach <mike.leach@linaro.org>,
        <coresight@lists.linaro.org>
Subject: [PATCHv10 2/6] coresight: etm4x: Use asm-generic IO memory barriers
Date:   Thu, 24 Feb 2022 11:37:04 +0530
Message-ID: <8e1fe065405c2d9d1e28e3f84880d156c2e887a4.1644824638.git.quic_saipraka@quicinc.com>
In-Reply-To: <cover.1644824638.git.quic_saipraka@quicinc.com>
References: <cover.1644824638.git.quic_saipraka@quicinc.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
Precedence: bulk

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: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: coresight@lists.linaro.org
Signed-off-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
---
 drivers/hwtracing/coresight/coresight-etm4x-core.c | 8 ++++----
 drivers/hwtracing/coresight/coresight-etm4x.h      | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index bf18128cf5de..89ba7bb4c41d 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)
 
-- 
2.33.1