[PATCH v2 0/8] x86/sev-es: Fixes for SEV-ES Guest Support

From: Joerg Roedel <joro@8bytes.org>
To: x86@kernel.org, Hyunwook Baek <baekhw@google.com>
Cc: Joerg Roedel <joro@8bytes.org>, Joerg Roedel <jroedel@suse.de>,
	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>,
	Sean Christopherson <seanjc@google.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: [PATCH v2 0/8] x86/sev-es: Fixes for SEV-ES Guest Support
Date: Wed, 19 May 2021 15:52:43 +0200	[thread overview]
Message-ID: <20210519135251.30093-1-joro@8bytes.org> (raw)

From: Joerg Roedel <jroedel@suse.de>

Hi,

here is the second version of my pending SEV-ES fixes. The most
important patches are patch 1 to 5, as they fix warnings and splats
that trigger with various debugging options are enabled.

Patches 6 to 8 fix a correctness issue in the instruction emulation
part of the #VC exception handler.

Please review.

Thanks,

	Joerg

Link to v1: https://lore.kernel.org/lkml/20210512075445.18935-1-joro@8bytes.org/

Changes since v1:

	- Documented why __get_user()/__put_user() are safe to use in
	  the #VC handlers memory access path.

	- Merged the revert into patch 3

	- Refactored code in the instruction decoder and added #GP
	  reporting when getting the instructions linear address fails.

Joerg Roedel (8):
  x86/sev-es: Don't return NULL from sev_es_get_ghcb()
  x86/sev-es: Forward page-faults which happen during emulation
  x86/sev-es: Use __put_user()/__get_user() for data accesses
  x86/sev-es: Fix error message in runtime #VC handler
  x86/sev-es: Leave NMI-mode before sending signals
  x86/insn-eval: Make 0 a valid RIP for insn_get_effective_ip()
  x86/insn: Extend error reporting from
    insn_fetch_from_user[_inatomic]()
  x86/sev-es: Propagate #GP if getting linear instruction address failed

 arch/x86/include/asm/insn-eval.h |   6 +-
 arch/x86/kernel/sev.c            | 127 +++++++++++++++++++++----------
 arch/x86/kernel/umip.c           |  10 +--
 arch/x86/lib/insn-eval.c         |  52 ++++++++-----
 4 files changed, 129 insertions(+), 66 deletions(-)

base-commit: a50c5bebc99c525e7fbc059988c6a5ab8680cb76
-- 
2.31.1