Re: [PATCH v3 00/26] arm: Run Arm CCA VMs with KVM

[Gavin Shan]

Hi Jean,

On 12/11/24 1:01 PM, Gavin Shan wrote:
> On 11/26/24 5:55 AM, Jean-Philippe Brucker wrote:
> > This series enables running confidential VMs on Arm CCA. The host KVM
> > support is progressing but still under discussion [1], so there is no
> > urgency to upstream this series. I'm sending this new version to give a
> > status update, and also to discuss remote attestation below.
> >
> > Since v2 [2] I addressed comments on the QAPI patches. The support for
> > running Linux in a Realm will be in Linux v6.13 [3], so the guest-facing
> > interface is now stable. One important change since v2 is the requirement
> > to initialize the whole GPA space in RMM before boot, which we do in patch
> > 9. The 'earlycon' kernel parameter now requires an unprotected address
> > parameter (see Documentation/arch/arm64/arm-cca.rst in Linux v6.13).
> >
> > Documentation to try this series out:
> > https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/Building+an+RME+stack+for+QEMU
>
> I followed the instructions, but encountering some issues. First of all, the
> recommended TF-RMM (branch: cca/v4) fails to be built. After switching to the
> latest upstream TF-RMM, it fails to be initialized.

Please ignore the issue. The RMM service can be started successfully with your
recommended tf-a/tf-rmm repositories. I don't know why tf-rmm wasn't built
successfully and all looks good after I reconnect to my x86-64 server. So
it seems the environment was corrupted.

https://git.codelinaro.org/linaro/dcap/rmm.git (branch: cca/v4)
https://git.codelinaro.org/linaro/dcap/tf-a/trusted-firmware-a.git (branch: 
cca/v4)

Logs from the host side
========================
INFO:    BL31: Initializing runtime services
INFO:    RMM setup done.
INFO:    BL31: Initializing RMM
INFO:    RMM init start.
Booting RMM v.0.5.0(debug) 4e2e764 Built with GCC 13.3.1
RMM-EL3 Interface v.0.4
Boot Manifest Interface v.0.3
RMI/RSI ABI v.1.0/1.0 built: Dec 11 2024 02:52:28
INFO:    RMM init end.

Thanks,
Gavin