On Fri, Nov 24, 2017 at 10:14:16AM +0100, Ingo Molnar wrote:
> From: Andy Lutomirski <l...@kernel.org>
>
> On 64-bit kernels, we used to assume that TSS.sp0 was the current
> top of stack. With the addition of an entry trampoline, this will
> no longer be the case. Store the current top of stack in TSS.sp1,
> which is otherwise unused but shares the same cacheline.
>
> Signed-off-by: Andy Lutomirski <l...@kernel.org>
> Reviewed-by: Thomas Gleixner <t...@linutronix.de>
> Cc: Borislav Petkov <b...@alien8.de>
> Cc: Borislav Petkov <bpet...@suse.de>
> Cc: Brian Gerst <brge...@gmail.com>
> Cc: Dave Hansen <dave.han...@intel.com>
> Cc: Denys Vlasenko <dvlas...@redhat.com>
> Cc: H. Peter Anvin <h...@zytor.com>
> Cc: Josh Poimboeuf <jpoim...@redhat.com>
> Cc: Linus Torvalds <torva...@linux-foundation.org>
> Cc: Peter Zijlstra <pet...@infradead.org>
> Link:
> http://lkml.kernel.org/r/f56634c746a2926eb7bae61e7b80ed51a1940769.1511497875.git.l...@kernel.org
> Signed-off-by: Ingo Molnar <mi...@kernel.org>
> ---
> arch/x86/include/asm/processor.h | 18 +++++++++++++-----
> arch/x86/include/asm/thread_info.h | 2 +-
> arch/x86/kernel/asm-offsets_64.c | 1 +
> arch/x86/kernel/process.c | 10 ++++++++++
> arch/x86/kernel/process_64.c | 1 +
> 5 files changed, 26 insertions(+), 6 deletions(-)
Reviewed-by: Borislav Petkov <b...@suse.de>
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
