On Tue, Feb 20, 2018 at 7:05 PM, Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxx>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> ---
> 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
>
> --
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