linux-kernel - [GIT PULL] x86/sgx for 6.2

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Date:   Mon, 12 Dec 2022 11:15:25 -0800
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [GIT PULL] x86/sgx for 6.2

Hi Linus,

Please pull some x86/sgx changes for v6.2.

The biggest deal in this series is support for a new hardware feature
that allows enclaves to detect and mitigate single-stepping attacks.

There's also a minor performance tweak and a little piece of the
kmap_atomic()=>kmap_local() transition.

--

The following changes since commit 30a0b95b1335e12efef89dd78518ed3e4a71a763:

  Linux 6.1-rc3 (2022-10-30 15:19:28 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tags/x86_sgx_for_6.2

for you to fetch changes up to 89e927bbcd45d507e5612ef72fda04182e544a38:

  x86/sgx: Replace kmap/kunmap_atomic() calls (2022-12-02 14:59:56 +0100)

----------------------------------------------------------------
 * Introduce a new SGX feature (Asynchrounous Exit Notification)
   for bare-metal enclaves and KVM guests to mitigate single-step
   attacks
 * Increase batching to speed up enclave release
 * Replace kmap/kunmap_atomic() calls

----------------------------------------------------------------
Dave Hansen (1):
      x86/sgx: Allow enclaves to use Asynchrounous Exit Notification

Kai Huang (1):
      KVM/VMX: Allow exposing EDECCSSA user leaf function to KVM guest

Kristen Carlson Accardi (1):
      x86/sgx: Replace kmap/kunmap_atomic() calls

Reinette Chatre (1):
      x86/sgx: Reduce delay and interference of enclave release

 arch/x86/include/asm/cpufeatures.h |  1 +
 arch/x86/include/asm/sgx.h         | 33 ++++++++++++++++++++++++++-------
 arch/x86/kernel/cpu/cpuid-deps.c   |  1 +
 arch/x86/kernel/cpu/scattered.c    |  1 +
 arch/x86/kernel/cpu/sgx/encl.c     | 35 +++++++++++++++++++++++++----------
 arch/x86/kernel/cpu/sgx/ioctl.c    |  6 +++---
 arch/x86/kernel/cpu/sgx/main.c     |  8 ++++----
 arch/x86/kvm/cpuid.c               |  6 ++----
 arch/x86/kvm/reverse_cpuid.h       |  3 +++
 9 files changed, 66 insertions(+), 28 deletions(-)