On Fri, 2019-08-16 at 21:56 +0200, Thomas Gleixner wrote:
> On Tue, 13 Aug 2019, Yu-cheng Yu wrote:
> > +/*
> > + * On context switches, XSAVE states are not restored until returning
> > + * to user-mode. FPU registers need to be restored before any changes,
> > + * and protected by fpregs_lock()/
On Tue, 13 Aug 2019, Yu-cheng Yu wrote:
> +/*
> + * On context switches, XSAVE states are not restored until returning
> + * to user-mode. FPU registers need to be restored before any changes,
> + * and protected by fpregs_lock()/fpregs_unlock().
I really had to read this comment twice to figure
Control-flow Enforcement (CET) MSR contents are XSAVES system states.
To support CET, introduce XSAVES system states first.
Signed-off-by: Yu-cheng Yu
---
arch/x86/include/asm/fpu/internal.h | 23 +++-
arch/x86/include/asm/fpu/xstate.h | 4 +-
arch/x86/kernel/fpu/core.c | 26
