[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [XEN PATCH v8 22/22] docs: add Arm FF-A mediator
Hi Jens, On 13/04/2023 08:14, Jens Wiklander wrote: Describes a FF-A version 1.1 [1] mediator to communicate with a Secure Partition in secure world. [1] https://developer.arm.com/documentation/den0077/latest Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx> --- SUPPORT.md | 8 ++++++++ docs/man/xl.cfg.5.pod.in | 15 +++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/SUPPORT.md b/SUPPORT.md index aa1940e55f09..1fd746f7f7f2 100644 --- a/SUPPORT.md +++ b/SUPPORT.md @@ -818,6 +818,14 @@ that covers the DMA of the device to be passed through.No support for QEMU backends in a 16K or 64K domain. +### ARM: Firmware Framework for Arm A-profile (FF-A) Mediator+ + Status, Arm64: Tech Preview + +There are still some code paths where a vCPU may hog a pCPU longer than +necessary. The FF-A mediator is not yet implemented for Arm32. Part of the +FF-A specification is not supported. NIT: You would suggest to add: "(See the top comment in ...)". So one can easily find the limitation. + ### ARM: Guest Device Tree supportStatus: Supporteddiff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in index 10f37990be57..bba99c576b48 100644 --- a/docs/man/xl.cfg.5.pod.in +++ b/docs/man/xl.cfg.5.pod.in @@ -1645,6 +1645,21 @@ in OP-TEE.This feature is a B<technology preview>. +=item B<ffa>+ +B<Arm only.> Allow a guest to communicate via FF-A with Secure Partitions +(SP), default false. + +Currently is only a small subset of the FF-A specification supported. Just +enough to communicate with OP-TEE. In general only direct messaging and +sharing memory with one SP. More advanced use cases where memory might be +shared or donated to multple SPs are not supported. Typo: s/multple/multiple/ + +See L<https://developer.arm.com/documentation/den0077/latest> for more +informantion about FF-A. Typo: s/informantion/information/ + +This feature is a B<technology preview>. + =back=back -- Julien Grall
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