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KVM: arm64: Handle FFA_RXTX_MAP and FFA_RXTX_UNMAP calls from the host

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Handle FFA_RXTX_MAP and FFA_RXTX_UNMAP calls from the host by sharing
the host's mailbox memory with the hypervisor and establishing a
separate pair of mailboxes between the hypervisor and the SPMD at EL3.

Co-developed-by: Andrew Walbran <qwandor@google.com>
Signed-off-by: Andrew Walbran <qwandor@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20230523101828.7328-5-will@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Will Deacon
2023-05-23 11:18:21 +01:00
committed by Oliver Upton
parent bc3888a0f4
commit 9d0c6a9af9
2 changed files with 196 additions and 0 deletions
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8
include/linux/arm_ffa.h
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@@ -94,6 +94,14 @@
*/
#define FFA_PAGE_SIZE SZ_4K
/*
* Minimum buffer size/alignment encodings returned by an FFA_FEATURES
* query for FFA_RXTX_MAP.
*/
#define FFA_FEAT_RXTX_MIN_SZ_4K 0
#define FFA_FEAT_RXTX_MIN_SZ_64K 1
#define FFA_FEAT_RXTX_MIN_SZ_16K 2
/* FFA Bus/Device/Driver related */
struct ffa_device {
int vm_id;