From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Jiang Liu To: Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Bjorn Helgaas , Randy Dunlap , Yinghai Lu , Borislav Petkov , Grant Likely Cc: Jiang Liu , Konrad Rzeszutek Wilk , Andrew Morton , Tony Luck , Joerg Roedel , Greg Kroah-Hartman , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [RFC Part1 v1 13/18] x86, irq: Move IRQ initialization routines from io_apic.c into vector.c Date: Thu, 11 Sep 2014 16:25:00 +0800 Message-Id: <1410423905-26239-14-git-send-email-jiang.liu@linux.intel.com> In-Reply-To: <1410423905-26239-1-git-send-email-jiang.liu@linux.intel.com> References: <1410423905-26239-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-ID: Move IRQ initialization routines from io_apic.c into vector.c, preparing for enabling hierarchy irqdomain. Signed-off-by: Jiang Liu --- arch/x86/include/asm/io_apic.h | 2 ++ arch/x86/kernel/apic/io_apic.c | 22 +--------------------- arch/x86/kernel/apic/vector.c | 28 ++++++++++++++++++++++++++++ 3 files changed, 31 insertions(+), 21 deletions(-) diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h index 533803dc3733..7bf86bfe05b1 100644 --- a/arch/x86/include/asm/io_apic.h +++ b/arch/x86/include/asm/io_apic.h @@ -145,6 +145,7 @@ extern unsigned long io_apic_irqs; struct irq_cfg; extern void ioapic_insert_resources(void); +extern int arch_early_ioapic_init(void); extern int native_setup_ioapic_entry(int, struct IO_APIC_route_entry *, unsigned int, int, @@ -249,6 +250,7 @@ extern void print_IO_APICs(void); #define io_apic_assign_pci_irqs 0 #define setup_ioapic_ids_from_mpc x86_init_noop static inline void ioapic_insert_resources(void) { } +static inline int arch_early_ioapic_init(void) { return 0; } static inline void print_IO_APICs(void) {} #define gsi_top (NR_IRQS_LEGACY) static inline int mp_find_ioapic(u32 gsi) { return 0; } diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index e2b3e8b40fcb..f51143507c1c 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -245,7 +245,7 @@ static void free_ioapic_saved_registers(int idx) ioapics[idx].saved_registers = NULL; } -int __init arch_early_irq_init(void) +int __init arch_early_ioapic_init(void) { struct irq_cfg *cfg; int i, node = cpu_to_node(0); @@ -2486,26 +2486,6 @@ unsigned int arch_dynirq_lower_bound(unsigned int from) return ioapic_initialized ? ioapic_dynirq_base : gsi_top; } -int __init arch_probe_nr_irqs(void) -{ - int nr; - - if (nr_irqs > (NR_VECTORS * nr_cpu_ids)) - nr_irqs = NR_VECTORS * nr_cpu_ids; - - nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids; -#if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ) - /* - * for MSI and HT dyn irq - */ - nr += gsi_top * 16; -#endif - if (nr < nr_irqs) - nr_irqs = nr; - - return 0; -} - #ifdef CONFIG_X86_32 static int io_apic_get_unique_id(int ioapic, int apic_id) { diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index f728cbfc29a9..2df1bff738b1 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -235,6 +235,34 @@ void clear_irq_vector(int irq, struct irq_cfg *cfg) raw_spin_unlock_irqrestore(&vector_lock, flags); } +int __init arch_probe_nr_irqs(void) +{ + int nr; + + if (nr_irqs > (NR_VECTORS * nr_cpu_ids)) + nr_irqs = NR_VECTORS * nr_cpu_ids; + + nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids; +#if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ) + /* + * for MSI and HT dyn irq + */ + if (gsi_top <= NR_IRQS_LEGACY) + nr += 8 * nr_cpu_ids; + else + nr += gsi_top * 16; +#endif + if (nr < nr_irqs) + nr_irqs = nr; + + return 0; +} + +int __init arch_early_irq_init(void) +{ + return arch_early_ioapic_init(); +} + static void __setup_vector_irq(int cpu) { /* Initialize vector_irq on a new cpu */ -- 1.7.10.4