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

From: Ingo Molnar
Date: Mon Jun 01 2020 - 12:54:33 EST


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.



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(-)