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firmware: arm_ffa: Allow the FF-A drivers to use 32bit mode of messaging

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[ Upstream commit 2d698e8b4f ]

An FF-A ABI could support both the SMC32 and SMC64 conventions.
A callee that runs in the AArch64 execution state and implements such
an ABI must implement both SMC32 and SMC64 conventions of the ABI.

So the FF-A drivers will need the option to choose the mode irrespective
of FF-A version and the partition execution mode flag in the partition
information.

Let us remove the check on the FF-A version for allowing the selection
of 32bit mode of messaging. The driver will continue to set the 32-bit
mode if the partition execution mode flag specified that the partition
supports only 32-bit execution.

Fixes: 106b11b1cc ("firmware: arm_ffa: Set up 32bit execution mode flag using partiion property")
Link: https://lore.kernel.org/r/20231005142823.278121-1-sudeep.holla@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sudeep Holla 2023-10-05 15:28:23 +01:00 committed by Greg Kroah-Hartman
parent 5429ecbb1b
commit d43c3e4974
1 changed files with 2 additions and 10 deletions
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12
drivers/firmware/arm_ffa/driver.c
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@ -668,17 +668,9 @@ static int ffa_partition_info_get(const char *uuid_str,
return 0;
}
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);
dev->mode_32bit = true;
}
static int ffa_sync_send_receive(struct ffa_device *dev,
@ -787,7 +779,7 @@ static void ffa_setup_partitions(void)
if (drv_info->version > FFA_VERSION_1_0 &&
!(tpbuf->properties & FFA_PARTITION_AARCH64_EXEC))
_ffa_mode_32bit_set(ffa_dev);
ffa_mode_32bit_set(ffa_dev);
}
kfree(pbuf);
}