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From: Joerg Roedel <jroedel@suse.de>
To: Sean Christopherson <seanjc@google.com>
Cc: Joerg Roedel <joro@8bytes.org>,
	Eric Biederman <ebiederm@xmission.com>,
	x86@kernel.org, kexec@lists.infradead.org,
	stable@vger.kernel.org, hpa@zytor.com,
	Andy Lutomirski <luto@kernel.org>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Jiri Slaby <jslaby@suse.cz>,
	Dan Williams <dan.j.williams@intel.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Juergen Gross <jgross@suse.com>,
	Kees Cook <keescook@chromium.org>,
	David Rientjes <rientjes@google.com>,
	Cfir Cohen <cfir@google.com>, Erdem Aktas <erdemaktas@google.com>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Mike Stunes <mstunes@vmware.com>,
	Martin Radev <martin.b.radev@gmail.com>,
	Arvind Sankar <nivedita@alum.mit.edu>,
	linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, virtualization@lists.linux-foundation.org
Subject: Re: [PATCH 1/2] kexec: Allow architecture code to opt-out at runtime
Date: Thu, 6 May 2021 20:24:01 +0200	[thread overview]
Message-ID: <YJQ0QdjdRwpMkIqU@suse.de> (raw)
In-Reply-To: <YJQOmxx1EMUqNpNn@google.com>

On Thu, May 06, 2021 at 03:43:23PM +0000, Sean Christopherson wrote:
> This misses kexec_file_load.

Right, thanks, I will fix that in the next version.

> Also, is a new hook really needed?  E.g. the SEV-ES check be shoved
> into machine_kexec_prepare().  The downside is that we'd do a fair
> amount of work before detecting failure, but that doesn't seem hugely
> problematic.

That could work, but I think its more user-friendly to just claim that
the syscalls are not supported at all.



  reply	other threads:[~2021-05-06 18:24 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
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 [this message]
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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