AuxXxilium/linux_dsm_epyc7002
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9999c8c01f
linux_dsm_epyc7002/arch/x86/entry
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Andy Lutomirski 9999c8c01f x86/entry: Call enter_from_user_mode() with IRQs off 
Now that slow-path syscalls always enter C before enabling
interrupts, it's straightforward to call enter_from_user_mode() before
enabling interrupts rather than doing it as part of entry tracing.

With this change, we should finally be able to retire exception_enter().

This will also enable optimizations based on knowing that we never
change context tracking state with interrupts on.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/bc376ecf87921a495e874ff98139b1ca2f5c5dd7.1457558566.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-10 10:53:26 +01:00
..
syscalls x86/syscalls/64: Mark sys_iopl() as using ptregs 2016-02-01 08:53:25 +01:00
vdso x86/vdso: Use static_cpu_has() 2016-01-30 11:22:23 +01:00
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: Call enter_from_user_mode() with IRQs off 2016-03-10 10:53:26 +01:00
entry_32.S x86/entry/32: Change INT80 to be an interrupt gate 2016-03-10 10:53:26 +01:00
entry_64_compat.S x86/entry/32: Change INT80 to be an interrupt gate 2016-03-10 10:53:26 +01:00
entry_64.S x86/entry: Improve system call entry comments 2016-03-10 09:48:15 +01:00
Makefile x86/entry: Move C entry and exit code to arch/x86/entry/common.c 2015-07-07 10:59:05 +02:00
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
thunk_64.S