Petteri Aimonen c4db485dd3 x86/fpu: Reset MXCSR to default in kernel_fpu_begin() ... [ Upstream commit 7ad816762f ] Previously, kernel floating point code would run with the MXCSR control register value last set by userland code by the thread that was active on the CPU core just before kernel call. This could affect calculation results if rounding mode was changed, or a crash if a FPU/SIMD exception was unmasked. Restore MXCSR to the kernel's default value. [ bp: Carve out from a bigger patch by Petteri, add feature check, add FNINIT call too (amluto). ] Signed-off-by: Petteri Aimonen <jpa@git.mail.kapsi.fi> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://bugzilla.kernel.org/show_bug.cgi?id=207979 Link: https://lkml.kernel.org/r/20200624114646.28953-2-bp@alien8.de Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-07-22 09:32:51 +02:00
..
asm	x86/fpu: Reset MXCSR to default in kernel_fpu_begin()	2020-07-22 09:32:51 +02:00
uapi/asm	x86/syscalls: Revert "x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long"	2020-06-03 08:21:29 +02:00