[PATCH v16 00/45] arm64: Support for Arm CCA in KVM

[Gavin Shan]

On 8/7/26 8:05 AM, Suzuki K Poulose wrote:

[...]

> 
> Here is a cleaned up version, rebased on to Will's kvmtool master
> branch:
> 
> https://gitlab.arm.com/linux-arm/kvmtool-cca cca/kvm-v16
> 
> (This works with the v15 of the KVM series too)
> Build on top of Fuad's Guest memfd support patches.
> 

With the following combination, I'm able boot up the realm guest.

   tf-rmm:   https://git.trustedfirmware.org/TF-RMM/tf-rmm.git            (branch: topics/rmm-v2.0-poc_2)
   tf-a:     https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git  (branch: master)
   host:     https://git.gitlab.arm.com/linux-arm/linux-cca.git           (branch: cca-host/v16)
   kvmtool:  https://gitlab.arm.com/linux-arm/kvmtool-cca                 (branch: cca/kvm-v16)

However, the guest can't boot up and become stuck in SMC_RSI_IPA_STATE_SET request,
which can't completed by the host.

   tf-rmm:   https://git.trustedfirmware.org/TF-RMM/tf-rmm.git            (branch: topics/rmm-v2.0-poc_3)

(1) Login the emulated host

machine$ ssh -o StrictHostKeyChecking=no root at 10.26.1.240

(2) Start realm guest using kvmtool

root at host:~# lkvm run --realm -c 1 -m 256                   \
              -k /mnt/linux/arch/arm64/boot/Image            \
              -i /mnt/buildroot/output/images/rootfs.cpio.xz \
              -p earlycon=uart,mmio,0x101000000
                  :
[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x000f0510]
[    0.000000] Linux version 7.2.0-rc5-gavin-gf5098b6bae76 (gshan at nvidia-grace-hopper-01.khw.eng.bos2.dc.redhat.com) (gcc (GCC) 14.3.1 20251022 (Red Hat 14.3.1-4), GNU ld version 2.41-65.el10) #47 SMP PREEMPT Mon Jul 27 02:29:03 EDT 2026
[    0.000000] KASLR enabled
[    0.000000] Machine model: linux,dummy-virt
[    0.000000] earlycon: uart0 at MMIO 0x0000000101000000 (options '')
[    0.000000] printk: legacy bootconsole [uart0] enabled
[    0.000000] efi: UEFI not found.
[    0.000000] OF: reserved mem: Reserved memory: No reserved-memory node in the DT
[    0.000000] NUMA: Faking a node at [mem 0x0000000080000000-0x000000008fffffff]
[    0.000000] NODE_DATA(0) allocated [mem 0x8ff76dc0-0x8ff7ac7f]
[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: PSCIv1.1 detected in firmware.
[    0.000000] psci: Using standard PSCI v0.2 function IDs
[    0.000000] psci: MIGRATE_INFO_TYPE not supported.
[    0.000000] psci: SMC Calling Convention v1.2
[    0.000000] RME: Using RSI version 1.0
<... no more output from the guest ...>


(3) The output from host's serial console

SMC_RMI_REALM_CREATE              12a4c7000 12a4c6000 > RMI_INCOMPLETE 0 24 0 0
       SMC_RMI_OP_MEM_DONATE       0 1002c7098 9 > RMI_INCOMPLETE 9 0 0 0
       SMC_RMI_OP_CONTINUE         0 0 > RMI_SUCCESS 0 0
SMC_RMI_RTT_UNPROT_UNMAP          12a4c7000 18f85c000 18fe00000 0 0 > RMI_ERROR_RTT 2 0 0 0 0
SMC_RMI_RTT_UNPROT_UNMAP          12a4c7000 18fe00000 18fe10000 0 0 > RMI_ERROR_RTT 2 0 0 0 0
SMC_RMI_RTT_UNPROT_UNMAP          12a4c7000 18fe00000 18fe10000 0 0 > RMI_ERROR_RTT 2 0 0 0 0
SMC_RMI_REC_CREATE                12a4c7000 12a392000 12a391000 > RMI_INCOMPLETE 0 40 0 0
       SMC_RMI_OP_MEM_DONATE       0 106406098 10 > RMI_INCOMPLETE 10 0 0 0
       SMC_RMI_OP_CONTINUE         0 0 > RMI_SUCCESS 0 0
SMC_RMI_REALM_ACTIVATE            12a4c7000 > RMI_SUCCESS
Unhandled write S2_0_C0_C2_2
SMC_RMI_RTT_DATA_MAP              12a4c7000 8ffb4000 8ffb5000 1 129f1d004 > RMI_INCOMPLETE 0 0 0 1
       SMC_RMI_OP_CONTINUE         0 0 > RMI_SUCCESS 8ffb5000 0
PSCI_84000000                     0 0 0 0 0 0 0 > 10001 0 0 0
PSCI_84000006                     0 0 0 0 0 0 0 > ffffffffffffffff 0 0 0
PSCI_8400000a                     80000000 0 0 0 0 0 0 > 0 0 0 0
SMC_80000000                      0 0 0 0 0 0 0 > 10002 0 0 0
SMC_84000050                      1 0 0 ffffacd67d1e8000 ffffacd67d124000 0 0 > ffffffffffffffff 0 0 0
SMC_80000001                      80000002 ffff 0 ffffacd67d1e8000 ffffacd67d124000 ffffacd67cd5d000 ffffacd67cd5dd38 > ffffffffffffffff 0 0 0
PSCI_8400000a                     c4000001 0 0 0 0 0 0 > 0 0 0 0
PSCI_8400000a                     c4000012 0 0 0 0 0 0 > ffffffffffffffff 0 0 0
PSCI_8400000a                     c4000015 0 0 0 0 0 0 > ffffffffffffffff 0 0 0
SMC_8600ff01                      ffffacd67cfc0740 10002 0 0 0 0 ffffacd67cfb3cc8 > ffffffffffffffff 0 0 0
SMC_RSI_VERSION                   10000 > RSI_SUCCESS 10000 10001
SMC_RSI_REALM_CONFIG              81385000 > RSI_SUCCESS
SMC_RSI_IPA_STATE_SET             80000000 90000000 1 0
SMC_RMI_RTT_SET_RIPAS             12a4c7000 12a392000 80000000 90000000 > RMI_ERROR_RTT 3
SMC_RMI_RTT_SET_RIPAS             12a4c7000 12a392000 80000000 90000000 > RMI_ERROR_RTT 3
SMC_RMI_RTT_SET_RIPAS             12a4c7000 12a392000 80000000 90000000 > RMI_ERROR_RTT 3
SMC_RMI_RTT_SET_RIPAS             12a4c7000 12a392000 80000000 90000000 > RMI_ERROR_RTT 3
SMC_RMI_RTT_SET_RIPAS             12a4c7000 12a392000 80000000 90000000 > RMI_ERROR_RTT 3
SMC_RMI_RTT_SET_RIPAS             12a4c7000 12a392000 80000000 90000000 > RMI_ERROR_RTT 3
<... the last message repeats ...>

Thanks,
Gavin