linux-kernel - [GIT PULL] x86/fpu changes for v5.8

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Date:   Mon, 1 Jun 2020 18:54:25 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/fpu changes for v5.8

Linus,

Please pull the latest x86/fpu git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-fpu-2020-06-01

   # HEAD: 55e00fb66fd5048f4a3ee357018fd26fc527abca x86/fpu/xstate: Restore supervisor states for signal return

Most of the changes here related to 'XSAVES supervisor state' support,
which is a feature that allows kernel-only data to be automatically
saved/restored by the FPU context switching code.

CPU features that can be supported this way are Intel PT, 'PASID' and
CET features.

 Thanks,

	Ingo

------------------>
Fenghua Yu (3):
      x86/fpu/xstate: Rename validate_xstate_header() to validate_user_xstate_header()
      x86/fpu/xstate: Define new macros for supervisor and user xstates
      x86/fpu/xstate: Define new functions for clearing fpregs and xstates

Yu-cheng Yu (7):
      x86/fpu/xstate: Separate user and supervisor xfeatures mask
      x86/fpu/xstate: Introduce XSAVES supervisor states
      x86/fpu/xstate: Update sanitize_restored_xstate() for supervisor xstates
      x86/fpu/xstate: Update copy_kernel_to_xregs_err() for supervisor states
      x86/fpu: Introduce copy_supervisor_to_kernel()
      x86/fpu/xstate: Preserve supervisor states for the slow path in __fpu__restore_sig()
      x86/fpu/xstate: Restore supervisor states for signal return


 arch/x86/include/asm/fpu/internal.h |  10 +-
 arch/x86/include/asm/fpu/xstate.h   |  52 +++++++---
 arch/x86/kernel/fpu/core.c          |  53 ++++++----
 arch/x86/kernel/fpu/init.c          |   3 +-
 arch/x86/kernel/fpu/regset.c        |   2 +-
 arch/x86/kernel/fpu/signal.c        | 144 ++++++++++++++++++--------
 arch/x86/kernel/fpu/xstate.c        | 199 +++++++++++++++++++++++++++---------
 arch/x86/kernel/process.c           |   2 +-
 arch/x86/kernel/signal.c            |   2 +-
 9 files changed, 336 insertions(+), 131 deletions(-)