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From: Sudeep Holla <sudeep.holla@arm.com>
To: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, op-tee@lists.trustedfirmware.org
Cc: Sudeep Holla <sudeep.holla@arm.com>,
	Marc Bonnici <marc.bonnici@arm.com>,
	Achin Gupta <achin.gupta@arm.com>,
	Jens Wiklander <jens.wiklander@linaro.org>,
	Valentin Laurent <valentin.laurent@trustonic.com>,
	Lukas Hanel <lukas.hanel@trustonic.com>,
	Coboy Chen <coboy.chen@mediatek.com>
Subject: [PATCH v3 09/10] firmware: arm_ffa: Set up 32bit execution mode flag using partiion property
Date: Wed,  7 Sep 2022 15:52:39 +0100	[thread overview]
Message-ID: <20220907145240.1683088-10-sudeep.holla@arm.com> (raw)
In-Reply-To: <20220907145240.1683088-1-sudeep.holla@arm.com>

FF-A v1.1 adds a flag in the partition properties to indicate if the
partition runs in the AArch32 or AArch64 execution state. Use the same
to set-up the 32-bit execution flag mode in the ffa_dev automatically
and ignore any requests to do the same from the ffa_driver.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/firmware/arm_ffa/driver.c | 13 ++++++++++++-
 include/linux/arm_ffa.h           |  2 ++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
index 42bc22220c69..34e12a2a98fe 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -648,11 +648,19 @@ static int ffa_partition_info_get(const char *uuid_str,
 	return 0;
 }
 
-static void ffa_mode_32bit_set(struct ffa_device *dev)
+static void _ffa_mode_32bit_set(struct ffa_device *dev)
 {
 	dev->mode_32bit = true;
 }
 
+static void ffa_mode_32bit_set(struct ffa_device *dev)
+{
+	if (drv_info->version > FFA_VERSION_1_0)
+		return;
+
+	_ffa_mode_32bit_set(dev);
+}
+
 static int ffa_sync_send_receive(struct ffa_device *dev,
 				 struct ffa_send_direct_data *data)
 {
@@ -744,6 +752,9 @@ static void ffa_setup_partitions(void)
 			       __func__, tpbuf->id);
 			continue;
 		}
+
+		if (!(tpbuf->properties & FFA_PARTITION_AARCH64_EXEC))
+			_ffa_mode_32bit_set(ffa_dev);
 	}
 	kfree(pbuf);
 }
diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h
index 09567ffd1f49..5964b6104996 100644
--- a/include/linux/arm_ffa.h
+++ b/include/linux/arm_ffa.h
@@ -106,6 +106,8 @@ struct ffa_partition_info {
 #define FFA_PARTITION_DIRECT_SEND	BIT(1)
 /* partition can send and receive indirect messages. */
 #define FFA_PARTITION_INDIRECT_MSG	BIT(2)
+/* partition runs in the AArch64 execution state. */
+#define FFA_PARTITION_AARCH64_EXEC	BIT(8)
 	u32 properties;
 	u32 uuid[4];
 };
-- 
2.37.3


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  parent reply	other threads:[~2022-09-07 14:57 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-07 14:52 [PATCH v3 00/10] firmware: arm_ffa: Refactoring and initial/minor v1.1 update Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 01/10] firmware: arm_ffa: Add pointer to the ffa_dev_ops in struct ffa_dev Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 02/10] tee: optee: Drop ffa_ops in optee_ffa structure using ffa_dev->ops directly Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 03/10] firmware: arm_ffa: Remove ffa_dev_ops_get() Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 04/10] firmware: arm_ffa: Add support for querying FF-A features Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 05/10] firmware: arm_ffa: Use FFA_FEATURES to detect if native versions are supported Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 06/10] firmware: arm_ffa: Make memory apis ffa_device independent Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 07/10] firmware: arm_ffa: Rename ffa_dev_ops as ffa_ops Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 08/10] firmware: arm_ffa: Add v1.1 get_partition_info support Sudeep Holla
2022-09-08 10:05   ` Jens Wiklander
2022-09-07 14:52 ` Sudeep Holla [this message]
2022-09-08 10:08   ` [PATCH v3 09/10] firmware: arm_ffa: Set up 32bit execution mode flag using partiion property Jens Wiklander
2022-09-08 10:25     ` Sudeep Holla
2022-09-07 14:52 ` [PATCH v3 10/10] firmware: arm_ffa: Split up ffa_ops into info, message and memory operations Sudeep Holla
2022-09-08 11:24 ` [PATCH v3 00/10] firmware: arm_ffa: Refactoring and initial/minor v1.1 update Sudeep Holla

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