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Subject[PATCH v2 09/10] firmware: arm_ffa: Set up 32bit execution mode flag using partiion property
Date
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 dd6ab2f81580..dbbe15592173 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -647,11 +647,19 @@ 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)
{
@@ -743,6 +751,9 @@ 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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