linux-kernel - [PATCH 0/4] x86/tdx: Changes for TDX guest initialization

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20221209132524.20200-1-kirill.shutemov@linux.intel.com>
Date:   Fri,  9 Dec 2022 16:25:20 +0300
From:   "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:     Dave Hansen <dave.hansen@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>
Cc:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Elena Reshetova <elena.reshetova@...el.com>, x86@...nel.org,
        linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH 0/4] x86/tdx: Changes for TDX guest initialization

Several changes to TDX initialization:

- Make early panic message visible to user;

- Relax SEPT_VE_DISABLE for debug TD. It helps to investigate bugs
  resulting in access of unaccepted memory.

- Make sure NOTIFY_ENABLES is off to eliminate possible source of random
  #VE.

The patchset makes use of ReportFatalError TDVMCALL. The definition of
the TDVMCALL has changed in recent GHCI update[1]. It now requires more
arguments handled by __tdx_hypercall(). The patch that expands
__tdx_hypercall() is the same as the patch included in TDX guest
enabling for Hyper-V.

[1] https://cdrdv2.intel.com/v1/dl/getContent/726790

Kirill A. Shutemov (4):
  x86/tdx: Expand __tdx_hypercall() to handle more arguments
  x86/tdx: Use ReportFatalError to report missing SEPT_VE_DISABLE
  x86/tdx: Relax SEPT_VE_DISABLE check for debug TD
  x86/tdx: Disable NOTIFY_ENABLES

 arch/x86/coco/tdx/tdcall.S        | 82 ++++++++++++++++++++++---------
 arch/x86/coco/tdx/tdx.c           | 57 ++++++++++++++++++++-
 arch/x86/include/asm/shared/tdx.h |  6 +++
 arch/x86/kernel/asm-offsets.c     |  6 +++
 4 files changed, 125 insertions(+), 26 deletions(-)

-- 
2.38.0