From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Jiang Liu To: Bjorn Helgaas , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Randy Dunlap , Yinghai Lu , Borislav Petkov , Dimitri Sivanich , x86@kernel.org, Jiang Liu , Jan Beulich Cc: Konrad Rzeszutek Wilk , David Cohen , Sander Eikelenboom , David Vrabel , Andrew Morton , Tony Luck , Joerg Roedel , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [Patch Part2 v4 27/33] x86/irq: Refine the way to calculate NR_IRQS Date: Tue, 20 Jan 2015 13:51:47 +0800 Message-Id: <1421733113-15704-28-git-send-email-jiang.liu@linux.intel.com> In-Reply-To: <1421733113-15704-1-git-send-email-jiang.liu@linux.intel.com> References: <1421733113-15704-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-ID: Now we have made MSI independent of IOAPIC, so we need to refine the way to calculate NR_IRQS to support configuration with MSI enabled but IOAPIC disabled. Signed-off-by: Jiang Liu Cc: Konrad Rzeszutek Wilk Cc: Tony Luck Cc: Joerg Roedel Cc: Greg Kroah-Hartman Cc: Bjorn Helgaas Cc: Benjamin Herrenschmidt Cc: Rafael J. Wysocki Cc: Randy Dunlap Cc: Yinghai Lu Cc: Borislav Petkov Cc: Jan Beulich Link: http://lkml.kernel.org/r/1416901802-24211-36-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner Tested-by: Joerg Roedel --- arch/x86/include/asm/irq_vectors.h | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h index 666c89ec4bd7..b26cb124a4f1 100644 --- a/arch/x86/include/asm/irq_vectors.h +++ b/arch/x86/include/asm/irq_vectors.h @@ -155,18 +155,22 @@ static inline int invalid_vm86_irq(int irq) * static arrays. */ -#define NR_IRQS_LEGACY 16 +#define NR_IRQS_LEGACY 16 -#define IO_APIC_VECTOR_LIMIT ( 32 * MAX_IO_APICS ) +#define CPU_VECTOR_LIMIT (64 * NR_CPUS) +#define IO_APIC_VECTOR_LIMIT (32 * MAX_IO_APICS) -#ifdef CONFIG_X86_IO_APIC -# define CPU_VECTOR_LIMIT (64 * NR_CPUS) -# define NR_IRQS \ +#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_PCI_MSI) +#define NR_IRQS \ (CPU_VECTOR_LIMIT > IO_APIC_VECTOR_LIMIT ? \ (NR_VECTORS + CPU_VECTOR_LIMIT) : \ (NR_VECTORS + IO_APIC_VECTOR_LIMIT)) -#else /* !CONFIG_X86_IO_APIC: */ -# define NR_IRQS NR_IRQS_LEGACY +#elif defined(CONFIG_X86_IO_APIC) +#define NR_IRQS (NR_VECTORS + IO_APIC_VECTOR_LIMIT) +#elif defined(CONFIG_PCI_MSI) +#define NR_IRQS (NR_VECTORS + CPU_VECTOR_LIMIT) +#else +#define NR_IRQS NR_IRQS_LEGACY #endif #endif /* _ASM_X86_IRQ_VECTORS_H */ -- 1.7.10.4