Commit 106b11b1 authored by Sudeep Holla's avatar Sudeep Holla
Browse files

firmware: arm_ffa: Set up 32bit execution mode flag using partiion property 

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
if the detected firmware version is above v1.0 and ignore any requests
to do the same from the ffa_driver.

Link: https://lore.kernel.org/r/20220907145240.1683088-10-sudeep.holla@arm.com


Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent bb1be749

drivers/firmware/arm_ffa/driver.c

+13 −1
Original line number Diff line number Diff line
@@ -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 +752,10 @@ static void ffa_setup_partitions(void) 
			       __func__, tpbuf->id);

			continue;

		}



		if (drv_info->version > FFA_VERSION_1_0 &&

		    !(tpbuf->properties & FFA_PARTITION_AARCH64_EXEC))

			_ffa_mode_32bit_set(ffa_dev);

	}

	kfree(pbuf);

}

include/linux/arm_ffa.h

+2 −0
Original line number Diff line number Diff line
@@ -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];

};