Hi Alex, On 10/31/23 13:02, Alex Bennée wrote: > Hi All, > > Since 8.1 we enabled the FEAT_RME CPU feature to allow for Arm CCA > guests to be run under QEMU's Arm emulation. While this is enough for > pure software guests eventually we would want to support modelling > systems with "real" hardware. One part of that is updating the SMMU > emulation to make it RME aware. > > The recently published F.a spec is available on the Arm site: > > https://developer.arm.com/documentation/ihi0070/latest/ > > As we have a keen interest on tracking (and implementing!) Arm features > we have coded up the various sub-features as stories under an EPIC for > each level of SMMU feature on our public JIRA: > > https://linaro.atlassian.net/browse/QEMU-533 (SMMUv3.0) > https://linaro.atlassian.net/browse/QEMU-553 (SMMUv3.1) > https://linaro.atlassian.net/browse/QEMU-558 (SMMUv3.2) > https://linaro.atlassian.net/browse/QEMU-566 (SMMUv3.3) > > I think the state of the cards currently represents what has been > implemented and what is left to do. As you can see it adds up to a fair > bit of stuff. As a lot of people have been hacking on the SMMU code over > the last few years I thought it would be useful to reach out and see who > else is interested in further enhancing the SMMU emulation support? > > If anyone has any patches/branches cooking or is intending to implement > any particular bits please do let me know and I can update the cards to > reflect the current state of work. As ever we will do our best to help > review and smooth the up-streaming process for all Arm related feature > enhancements.
At the moment I have no plan to work on any of those features besides following "Nested Translation Support for SMMUv3" works ([PATCH v2 00/17] Add Nested Translation Support for SMMUv3 <https://lore.kernel.org/all/cover.1683688960.git.nicol...@nvidia.com/#r>). Adding Nicolin in CC by the way. However I will take some cycles to review patches when they come. Thanks Eric > > Thanks, >
