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* [PATCH 0/2] x86: Disable kexec for SEV-ES guests
@ 2021-05-06  9:31 Joerg Roedel
  2021-05-06  9:31 ` [PATCH 1/2] kexec: Allow architecture code to opt-out at runtime Joerg Roedel
  2021-05-06  9:31 ` [PATCH 2/2] x86/kexec/64: Forbid kexec when running as an SEV-ES guest Joerg Roedel
  0 siblings, 2 replies; 9+ messages in thread
From: Joerg Roedel @ 2021-05-06  9:31 UTC (permalink / raw)
  To: Eric Biederman, x86
  Cc: kexec, Joerg Roedel, hpa, Andy Lutomirski, Dave Hansen,
	Peter Zijlstra, Jiri Slaby, Dan Williams, Tom Lendacky,
	Juergen Gross, Kees Cook, David Rientjes, Cfir Cohen,
	Erdem Aktas, Masami Hiramatsu, Mike Stunes, Sean Christopherson,
	Martin Radev, Arvind Sankar, Joerg Roedel, linux-coco,
	linux-kernel, kvm, virtualization

From: Joerg Roedel <jroedel@suse.de>

Hi,

two small patches to disable kexec on x86 when running as an SEV-ES
guest. Trying to kexec a new kernel would fail anyway because there is
no mechanism yet to hand over the APs from the old to the new kernel.
Supporting this needs changes in the Hypervisor and the guest kernel
as well.

This code is currently being work on, but disable kexec in SEV-ES
guests until it is ready.

Please review.

Regards,

	Joerg

Joerg Roedel (2):
  kexec: Allow architecture code to opt-out at runtime
  x86/kexec/64: Forbid kexec when running as an SEV-ES guest

 arch/x86/kernel/machine_kexec_64.c |  8 ++++++++
 kernel/kexec.c                     | 14 ++++++++++++++
 2 files changed, 22 insertions(+)

-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2021-05-06 20:41 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-06  9:31 [PATCH 0/2] x86: Disable kexec for SEV-ES guests Joerg Roedel
2021-05-06  9:31 ` [PATCH 1/2] kexec: Allow architecture code to opt-out at runtime Joerg Roedel
2021-05-06 15:43   ` Sean Christopherson
2021-05-06 18:24     ` Joerg Roedel
2021-05-06  9:31 ` [PATCH 2/2] x86/kexec/64: Forbid kexec when running as an SEV-ES guest Joerg Roedel
2021-05-06 17:42   ` Eric W. Biederman
2021-05-06 18:41     ` Joerg Roedel
2021-05-06 18:59       ` Eric W. Biederman
2021-05-06 20:41         ` Joerg Roedel

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