linux-kernel - [PATCH v7 0/2] x86/sev: Fixes for SEV-ES Guest Support

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Date:   Fri, 18 Jun 2021 13:54:07 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     x86@...nel.org
Cc:     Joerg Roedel <joro@...tes.org>, Joerg Roedel <jroedel@...e.de>,
        hpa@...or.com, Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Slaby <jslaby@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Juergen Gross <jgross@...e.com>,
        Kees Cook <keescook@...omium.org>,
        David Rientjes <rientjes@...gle.com>,
        Cfir Cohen <cfir@...gle.com>,
        Erdem Aktas <erdemaktas@...gle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mike Stunes <mstunes@...are.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Martin Radev <martin.b.radev@...il.com>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org
Subject: [PATCH v7 0/2] x86/sev: Fixes for SEV-ES Guest Support

From: Joerg Roedel <jroedel@...e.de>

Hi,

please find here the next iteration of my pending fixes for SEV-ES
guest support in Linux. This version addresses the comments I received
from Peter on the previous version, in particular:

	- Removed IRQ disable/enable calls in the ap-hlt loop code
	- Made __sev_get/put_ghcb() noinstr instead of __always_inline
	  and put instrumentation_begin()/end() calls around panic()
	  to fix an objtool warning.
	- Split up #DB handling in the #VC handler into a from-user
	  and from-kernel part as well.

The patches are again tested with a kernel with various debugging
options enabled, running as an SEV-ES guest.

The previous version of these patches can be found here:

	https://lore.kernel.org/lkml/20210616184913.13064-1-joro@8bytes.org/

Please review.

Thanks,

	Joerg

Joerg Roedel (2):
  x86/sev: Make sure IRQs are disabled while GHCB is active
  x86/sev: Split up runtime #VC handler for correct state tracking

 arch/x86/entry/entry_64.S       |   4 +-
 arch/x86/include/asm/idtentry.h |  29 ++---
 arch/x86/kernel/sev.c           | 182 ++++++++++++++++++--------------
 3 files changed, 113 insertions(+), 102 deletions(-)


base-commit: 07570cef5e5c3fcec40f82a9075abb4c1da63319
-- 
2.31.1