On Fri, Jul 24, 2015 at 10:57:05PM -0700, Andy Lutomirski wrote:
> We don't specifically need IST for things like kprobes, but we do
> want to avoid rare, surprising extra stack usage if a kprobe hits
> with a deep stack.
>
> Teach idtentry to use the IRQ stack for selected entries.
>
> This implementation uses the IRQ stack even if we entered from user
> mode. This disallows tricks like ist_begin_non_atomic. If we ever
> need such a trick in one of these entries, we can rework this. For
> now, let's keep it simple.
>
> Signed-off-by: Andy Lutomirski <l...@kernel.org>
> ---
> arch/x86/entry/entry_64.S | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
Reviewed-by: Borislav Petkov <b...@suse.de>
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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