Hi Jens, > On 31 Jul 2023, at 14:15, Jens Wiklander <[email protected]> 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 <[email protected]> > Reviewed-by: Henry Wang <[email protected]>
Reviewed-by: Bertrand Marquis <[email protected]> Cheers Bertrand > --- > v10->v11 > - Add a CHANGELOG.md entry as requested > --- > CHANGELOG.md | 3 ++- > SUPPORT.md | 9 +++++++++ > docs/man/xl.cfg.5.pod.in | 15 +++++++++++++++ > 3 files changed, 26 insertions(+), 1 deletion(-) > > diff --git a/CHANGELOG.md b/CHANGELOG.md > index 7d7e0590f8c6..f24c8c4b8011 100644 > --- a/CHANGELOG.md > +++ b/CHANGELOG.md > @@ -24,7 +24,8 @@ The format is based on [Keep a > Changelog](https://keepachangelog.com/en/1.0.0/) > - xl/libxl can customize SMBIOS strings for HVM guests. > - Add support for AVX512-FP16 on x86. > - On Arm, Xen supports guests running SVE/SVE2 instructions. (Tech Preview) > - > + - On Arm, add suport for Firmware Framework for Arm A-profile (FF-A) > Mediator > + (Tech Preview) > > ## > [4.17.0](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.17.0) > - 2022-12-12 > > diff --git a/SUPPORT.md b/SUPPORT.md > index 35a6249e03b2..fe512762cee7 100644 > --- a/SUPPORT.md > +++ b/SUPPORT.md > @@ -840,6 +840,15 @@ 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, see the top comment in > +xen/arch/arm/tee/ffa.c for limitations. > + > ### 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 a2bccd5b48a1..ec4864958e0e 100644 > --- a/docs/man/xl.cfg.5.pod.in > +++ b/docs/man/xl.cfg.5.pod.in > @@ -1656,6 +1656,21 @@ 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 only a small subset of the FF-A specification is 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 multiple SPs are not supported. > + > +See L<https://developer.arm.com/documentation/den0077/latest> for more > +information about FF-A. > + > +This feature is a B<technology preview>. > + > =back > > =back > -- > 2.34.1 >
