Commit-ID: 50beba07a0e42ebd4454adc97515a2a2a969645b Gitweb: https://git.kernel.org/tip/50beba07a0e42ebd4454adc97515a2a2a969645b Author: Andy Shevchenko <andriy.shevche...@linux.intel.com> AuthorDate: Tue, 20 Feb 2018 20:05:04 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Mon, 12 Mar 2018 12:32:57 +0100
ACPI, x86/boot: Split out acpi_generic_reduce_hw_init() and export 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.shevche...@linux.intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com> Cc: Eric Biederman <ebied...@xmission.com> Cc: Juergen Gross <jgr...@suse.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Rafael J . Wysocki <rafael.j.wyso...@intel.com> Cc: Thomas Gleixner <t...@linutronix.de> Cc: linux-a...@vger.kernel.org Link: http://lkml.kernel.org/r/20180220180506.65523-1-andriy.shevche...@linux.intel.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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(); } /*
