Rik van Riel 69277c98f5 x86/fpu: Always store the registers in copy_fpstate_to_sigframe() ... copy_fpstate_to_sigframe() stores the registers directly to user space. This is okay because the FPU registers are valid and saving them directly avoids saving them into kernel memory and making a copy. However, this cannot be done anymore if the FPU registers are going to be restored on the return to userland. It is possible that the FPU registers will be invalidated in the middle of the save operation and this should be done with disabled preemption / BH. Save the FPU registers to the task's FPU struct and copy them to the user memory later on. Signed-off-by: Rik van Riel <riel@surriel.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Dave Hansen <dave.hansen@intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jann Horn <jannh@google.com> Cc: "Jason A. Donenfeld" <Jason@zx2c4.com> Cc: kvm ML <kvm@vger.kernel.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20190403164156.19645-18-bigeasy@linutronix.de		2019-04-11 18:08:57 +02:00
..
bugs.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
core.c	x86/fpu: Remove user_fpu_begin()	2019-04-10 15:58:44 +02:00
init.c	x86/fpu: Remove fpu->initialized	2019-04-10 15:42:40 +02:00
Makefile	x86/fpu: Factor out the FPU regset code into fpu/regset.c	2015-05-19 15:48:09 +02:00
regset.c	x86/fpu: Remove fpu->initialized	2019-04-10 15:42:40 +02:00
signal.c	x86/fpu: Always store the registers in copy_fpstate_to_sigframe()	2019-04-11 18:08:57 +02:00
xstate.c	x86/fpu: Use a feature number instead of mask in two more helpers	2019-04-10 18:20:27 +02:00