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| author | Marc Bonnici <marc.bonnici@arm.com> | 2021-10-15 17:57:42 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2021-10-18 13:11:06 +0100 |
| commit | 82a8daaecfd9382e9450a05f86be8a274cf69a27 (patch) | |
| tree | d7eb418850dc994495b0cd06f1ff0f30ef1bbc3e /include/linux/arm_ffa.h | |
| parent | 8e3f9da608f14cfebac2659d8dd8737b79d01308 (diff) | |
| download | linux-82a8daaecfd9382e9450a05f86be8a274cf69a27.tar.bz2 | |
firmware: arm_ffa: Add support for MEM_LEND
As part of the FF-A spec, an endpoint is allowed to transfer access of,
or lend, a memory region to one or more borrowers.
Extend the existing memory sharing implementation to support
FF-A MEM_LEND functionality and expose this to other kernel drivers.
Note that upon a successful MEM_LEND request the caller must ensure that
the memory region specified is not accessed until a successful
MEM_RECALIM call has been made. On systems with a hypervisor present
this will been enforced, however on systems without a hypervisor the
responsibility falls to the calling kernel driver to prevent access.
Link: https://lore.kernel.org/r/20211015165742.2513065-1-marc.bonnici@arm.com
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'include/linux/arm_ffa.h')
| -rw-r--r-- | include/linux/arm_ffa.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index 505c679b6a9b..85651e41ded8 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -262,6 +262,8 @@ struct ffa_dev_ops { int (*memory_reclaim)(u64 g_handle, u32 flags); int (*memory_share)(struct ffa_device *dev, struct ffa_mem_ops_args *args); + int (*memory_lend)(struct ffa_device *dev, + struct ffa_mem_ops_args *args); }; #endif /* _LINUX_ARM_FFA_H */ |