Re: Is kexec supported in QEMU for ARM64 (qemu-system-aarch64) with arm-trusted-firmware, optee, and u-boot.

[Lakshmi Ramasubramanian]

On 9/26/19 8:17 AM, Lakshmi Ramasubramanian wrote:

The following commit for ARM Trusted Firmware for QEMU virt ARMv8-A
is almost 3 years old

https://salsa.debian.org/debian/atf-allwinner/commit/b6b671c4ac4bd5595306863225bb3bece1e6135c

Current limitations:
* Only cold boot is supported
* No build instructions for QEMU_EFI.fd and rootfs-arm64.cpio.gz
* No instructions for how to load a BL32 (Secure Payload)

So looks like only cold boot is supported (no kexec support)
Is this correct?

> When I execute kexec ("kexec -l <kernel>", followed by "kexec -e") I hit 
> the following assert (in arm-trusted-firmware/plat/qemu/qemu_pm.c)
>
> /******************************************************************************* 
>
>   * Platform handler called when a power domain is about to be turned
>   * off. The target_state encodes the power state that each level should
>   * transition to.
> ******************************************************************************/ 
>
> void qemu_pwr_domain_off(const psci_power_state_t *target_state)
> {
>      assert(0);
> }
>
> Is kexec supported in ARM64 QEMU (qemu-system-aarch64) -
> using arm-trusted-firmware, optee, and u-boot?
>
> Thanks,
>   -lakshmi