linux-kernel - Re: [PATCH v5 1/3] ACPI / x86: boot: Split out acpi_generic_reduce_hw

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Date:   Fri, 23 Feb 2018 12:51:18 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        "H . Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        Eric Biederman <ebiederm@...ssion.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Juergen Gross <jgross@...e.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 1/3] ACPI / x86: boot: Split out
 acpi_generic_reduce_hw_init() and export

On Tue, 2018-02-20 at 19:42 +0100, Rafael J. Wysocki wrote:
> On Tue, Feb 20, 2018 at 7:05 PM, Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> > This is a preparation patch to allow override the hardware reduced
> > initialization on ACPI enabled platforms.
> > 
> > No functional change intended.
> > 
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> 
> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Thanks, Rafael!

Ingo, can it be applied?

> 
> > ---
> >  arch/x86/include/asm/acpi.h |  4 ++++
> >  arch/x86/kernel/acpi/boot.c | 22 +++++++++++++---------
> >  2 files changed, 17 insertions(+), 9 deletions(-)
> > 
> > diff --git a/arch/x86/include/asm/acpi.h
> > b/arch/x86/include/asm/acpi.h
> > index 6609dd7289b5..a303d7b7d763 100644
> > --- a/arch/x86/include/asm/acpi.h
> > +++ b/arch/x86/include/asm/acpi.h
> > @@ -140,6 +140,8 @@ static inline u64
> > acpi_arch_get_root_pointer(void)
> >         return x86_init.acpi.get_root_pointer();
> >  }
> > 
> > +void acpi_generic_reduced_hw_init(void);
> > +
> >  #else /* !CONFIG_ACPI */
> > 
> >  #define acpi_lapic 0
> > @@ -149,6 +151,8 @@ static inline void acpi_noirq_set(void) { }
> >  static inline void acpi_disable_pci(void) { }
> >  static inline void disable_acpi(void) { }
> > 
> > +static inline void acpi_generic_reduced_hw_init(void) { }
> > +
> >  #endif /* !CONFIG_ACPI */
> > 
> >  #define ARCH_HAS_POWER_INIT    1
> > diff --git a/arch/x86/kernel/acpi/boot.c
> > b/arch/x86/kernel/acpi/boot.c
> > index 2aa92094b59d..baa084ecffdb 100644
> > --- a/arch/x86/kernel/acpi/boot.c
> > +++ b/arch/x86/kernel/acpi/boot.c
> > @@ -1376,17 +1376,21 @@ static int __init
> > dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
> >   *
> >   * We initialize the Hardware-reduced ACPI model here:
> >   */
> > +void __init acpi_generic_reduced_hw_init(void)
> > +{
> > +       /*
> > +        * Override x86_init functions and bypass legacy PIC in
> > +        * hardware reduced ACPI mode.
> > +        */
> > +       x86_init.timers.timer_init      = x86_init_noop;
> > +       x86_init.irqs.pre_vector_init   = x86_init_noop;
> > +       legacy_pic                      = &null_legacy_pic;
> > +}
> > +
> >  static void __init acpi_reduced_hw_init(void)
> >  {
> > -       if (acpi_gbl_reduced_hardware) {
> > -               /*
> > -                * Override x86_init functions and bypass legacy pic
> > -                * in Hardware-reduced ACPI mode
> > -                */
> > -               x86_init.timers.timer_init      = x86_init_noop;
> > -               x86_init.irqs.pre_vector_init   = x86_init_noop;
> > -               legacy_pic                      = &null_legacy_pic;
> > -       }
> > +       if (acpi_gbl_reduced_hardware)
> > +               acpi_generic_reduced_hw_init();
> >  }
> > 
> >  /*
> > --
> > 2.15.1
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-
> > acpi" in
> > the body of a message to majordomo@...r.kernel.org
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-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy