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From:   Joerg Roedel <joro@8bytes.org>
To:     Eric Biederman <ebiederm@xmission.com>, x86@kernel.org
Cc:     kexec@lists.infradead.org, Joerg Roedel <jroedel@suse.de>,
        hpa@zytor.com, Andy Lutomirski <luto@kernel.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
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        Erdem Aktas <erdemaktas@google.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Mike Stunes <mstunes@vmware.com>,
        Sean Christopherson <seanjc@google.com>,
        Martin Radev <martin.b.radev@gmail.com>,
        Arvind Sankar <nivedita@alum.mit.edu>,
        Joerg Roedel <joro@8bytes.org>, linux-coco@lists.linux.dev,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        virtualization@lists.linux-foundation.org
Subject: [PATCH 0/2] x86: Disable kexec for SEV-ES guests
Date:   Thu,  6 May 2021 11:31:20 +0200
Message-Id: <20210506093122.28607-1-joro@8bytes.org>
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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