Re: [PATCH v2 00/12] x86/sev: KEXEC/KDUMP support for SEV-ES guests

[Dave Hansen]

On 9/13/21 8:55 AM, Joerg Roedel wrote:
> This does not work under SEV-ES, because the hypervisor has no access
> to the vCPU registers and can't make modifications to them. So an
> SEV-ES guest needs to reset the vCPU itself and park it using the
> AP-reset-hold protocol. Upon wakeup the guest needs to jump to
> real-mode and to the reset-vector configured in the AP-Jump-Table.

How does this end up looking to an end user that tries to kexec() from a
an SEV-ES kernel?  Does it just hang?