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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: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla 2022-09-07 15:52:39 +01:00
parent bb1be74985
commit 106b11b1cc
2 changed files with 15 additions and 1 deletions
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14
drivers/firmware/arm_ffa/driver.c
View File

@ -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);
}

2
include/linux/arm_ffa.h
View File

@ -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];
};