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From:   "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To:     dave.hansen@intel.com, tglx@linutronix.de, mingo@redhat.com,
        bp@alien8.de
Cc:     decui@microsoft.com, rick.p.edgecombe@intel.com,
        sathyanarayanan.kuppuswamy@linux.intel.com, seanjc@google.com,
        thomas.lendacky@amd.com, x86@kernel.org,
        linux-kernel@vger.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv3 0/3] x86/tdx: Fix one more load_unaligned_zeropad() issue
Date:   Tue,  6 Jun 2023 12:56:19 +0300
Message-Id: <20230606095622.1939-1-kirill.shutemov@linux.intel.com>
MIME-Version: 1.0
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Precedence: bulk

During review of TDX guests on Hyper-V patchset Dave pointed to the
potential race between changing page private/shared status and
load_unaligned_zeropad().

Fix the issue.

v3:
 - Fix grammar;
 - Add Sathya's Reviewed-bys;
v2:
 - Add more info in commit message of the first patch.
 - Move enc_status_change_finish_noop() into a separate patch.
 - Fix typo in commit message and comment.

Kirill A. Shutemov (3):
  x86/mm: Allow guest.enc_status_change_prepare() to fail
  x86/tdx: Fix race between set_memory_encrypted() and
    load_unaligned_zeropad()
  x86/mm: Fix enc_status_change_finish_noop()

 arch/x86/coco/tdx/tdx.c         | 64 +++++++++++++++++++++++++++++++--
 arch/x86/include/asm/x86_init.h |  2 +-
 arch/x86/kernel/x86_init.c      |  4 +--
 arch/x86/mm/mem_encrypt_amd.c   |  4 ++-
 arch/x86/mm/pat/set_memory.c    |  3 +-
 5 files changed, 69 insertions(+), 8 deletions(-)

-- 
2.39.3