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

From
Dave Hansen <hidden>
Date
2021-09-13 16:03:47
Also in
kexec, kvm, linux-coco, lkml
Reply to
Joerg Roedel, 2021-09-13
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?
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Thread (26 messages) 26 messages, 4 authors, last reply 2022-01-27
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