linux-kernel - [GIT PULL] x86/tdx for 6.5

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Date:   Mon, 26 Jun 2023 12:30:50 -0700
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     torvalds@...ux-foundation.org
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>
Subject: [GIT PULL] x86/tdx for 6.5

Hi Linus,

Please pull some x86/tdx changes for 6.5.  This includes a very minor
cleanup and a fix for a race.  The race has never been observed in
practice but might allow load_unaligned_zeropad() to catch a TDX page
in the middle of its conversion process which would lead to a fatal
and unrecoverable guest shutdown.

--

The following changes since commit 44c026a73be8038f03dbdeef028b642880cf1511:

  Linux 6.4-rc3 (2023-05-21 14:05:48 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tags/x86_tdx_for_6.5

for you to fetch changes up to 94142c9d1bdf1c18027a42758ceb6bdd59a92012:

  x86/mm: Fix enc_status_change_finish_noop() (2023-06-06 16:24:27 -0700)

----------------------------------------------------------------
 - Fix a race window where load_unaligned_zeropad() could cause
   a fatal shutdown during TDX private<=>shared conversion
 - Annotate sites where VM "exit reasons" are reused as hypercall
   numbers.

----------------------------------------------------------------
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()

Nikolay Borisov (1):
      x86/tdx: Wrap exit reason with hcall_func()

 arch/x86/boot/compressed/tdx.c    |  4 +--
 arch/x86/coco/tdx/tdx.c           | 62 ++++++++++++++++++++++++++++++---------
 arch/x86/include/asm/shared/tdx.h | 11 +++++++
 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 +-
 7 files changed, 69 insertions(+), 21 deletions(-)