Hi Jens, > On 22 Feb 2023, at 16:33, Jens Wiklander <jens.wiklan...@linaro.org> 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.wiklan...@linaro.org>
It is a little bit hard to check what is said here as the limitations are probably due to some things done after this patch. I would suggest to move this patch later in the serie. Cheers Bertrand > --- > SUPPORT.md | 7 +++++++ > docs/man/xl.cfg.5.pod.in | 15 +++++++++++++++ > 2 files changed, 22 insertions(+) > > diff --git a/SUPPORT.md b/SUPPORT.md > index aa1940e55f09..5e0595419684 100644 > --- a/SUPPORT.md > +++ b/SUPPORT.md > @@ -818,6 +818,13 @@ 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. > + > ### ARM: Guest Device Tree support > > Status: Supported > diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in > index 024bceeb61b2..ca4fc3e67b0c 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 is not supported. > + > +See L<https://developer.arm.com/documentation/den0077/latest> for more > +informantion about FF-A. > + > +This feature is a B<technology preview>. > + > =back > > =back > -- > 2.34.1 >
