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092c74e420
linux_dsm_epyc7002/arch/x86/entry
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Brian Gerst 092c74e420 x86/entry, sched/x86: Don't save/restore EFLAGS on task switch 
Now that NT is filtered by the SYSENTER entry code, it is safe to skip saving and
restoring flags on task switch.  Also remove a leftover reset of flags on 64-bit
fork.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1462416278-11974-2-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-05-05 08:37:30 +02:00
..
syscalls x86/syscalls: Wire up compat readv2/writev2 syscalls 2016-04-13 10:31:26 +02:00
vdso x86/vdso: Remove direct HPET access through the vDSO 2016-04-13 10:28:34 +02:00
vsyscall x86/vdso: Disallow vvar access to vclock IO for never-used vclocks 2016-01-12 11:59:35 +01:00
calling.h x86/asm/entry: Remove unused SAVE_ALL/RESTORE_ALL macros for !CONFIG_x86_64 2016-01-19 08:24:03 +01:00
common.c x86/entry: Rename is_{ia32,x32}_task() to in_{ia32,x32}_syscall() 2016-04-19 10:44:52 +02:00
entry_32.S x86/entry, sched/x86: Don't save/restore EFLAGS on task switch 2016-05-05 08:37:30 +02:00
entry_64_compat.S x86/asm/entry/32: Simplify pushes of zeroed pt_regs->REGs 2016-05-03 08:19:40 +02:00
entry_64.S x86/entry, sched/x86: Don't save/restore EFLAGS on task switch 2016-05-05 08:37:30 +02:00
Makefile objtool: Mark non-standard object files and directories 2016-02-29 08:35:02 +01:00
syscall_32.c x86/syscalls: Add syscall entry qualifiers 2016-01-29 09:46:38 +01:00
syscall_64.c x86/entry/64: Always run ptregs-using syscalls on the slow path 2016-01-29 09:46:38 +01:00
thunk_32.S Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-06-22 17:59:09 -07:00
thunk_64.S x86/asm/entry: Create stack frames in thunk functions 2016-02-24 08:35:43 +01:00