[PATCH 0/3] arm64: cleanup DAIF handling for EL0 returns

[Mark Rutland]

On Thu, Feb 08, 2024 at 11:28:32AM +0900, Itaru Kitayama wrote:
> On Tue, Feb 06, 2024 at 12:38:45PM +0000, Mark Rutland wrote:
> > Hi,
> > 
> > These patches rework DAIF handling when returning to EL0, simplifiying
> > the logic in do_notify_resume() and allowing Debug + SError to be
> > unmasked for a little longer during exception return.
> > 
> > My primary motivation for these changes is to centralize entry/exit DAIF
> > management within entry-common.c, as this will allow entry/exit
> > sequences to be specialised, and make it much easier to add support for
> > FEAT_NMI. With specialized entry DAIF management, it will also be
> > possible to simplify local_daif_{save,restore}() and
> > local_irq_{save,restore}().
> > 
> > I'm sending this out on its own as (IMO) it's a nice cleanup on its own,
> > and I don't believe that I'll have the remainder of the DAIF rework
> > ready for this cycle.
> > 
> > The series is based on v6.8-rc3.
> > 
> > Mark.
> > 
> > Mark Rutland (3):
> >   arm64: Simplify do_notify_resume() DAIF masking
> >   arm64: Move do_notify_resume() to entry-common.c
> >   arm64: Unmask Debug + SError in do_notify_resume()
> > 
> >  arch/arm64/include/asm/exception.h |  2 +-
> >  arch/arm64/kernel/entry-common.c   | 36 ++++++++++++++++++++++++++-
> >  arch/arm64/kernel/signal.c         | 39 ++----------------------------
> >  3 files changed, 38 insertions(+), 39 deletions(-)
> 
> Boot tested on RevC FVP and kselftest arm64 subcategory runs without an error
> on RevC FVP too.

Thanks for testing! Would you be happy for that to imply a tested-by tag, e.g.

  Tested-by: Itaru Kitayama <itaru.kitayama at linux.dev>

... ?

Mark.