Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757912AbYBGJVe (ORCPT ); Thu, 7 Feb 2008 04:21:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755025AbYBGJUL (ORCPT ); Thu, 7 Feb 2008 04:20:11 -0500 Received: from brick.kernel.dk ([87.55.233.238]:18496 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753494AbYBGJUB (ORCPT ); Thu, 7 Feb 2008 04:20:01 -0500 From: Jens Axboe To: linux-kernel@vger.kernel.org Cc: Alan.Brunelle@hp.com, arjan@linux.intel.com, dgc@sgi.com, npiggin@suse.de, Jens Axboe Subject: [PATCH 4/8] x86: add support for remotely triggering the block softirq Date: Thu, 7 Feb 2008 10:19:01 +0100 Message-Id: <1202375945-29525-5-git-send-email-jens.axboe@oracle.com> X-Mailer: git-send-email 1.5.4.22.g7a20 In-Reply-To: <1202375945-29525-1-git-send-email-jens.axboe@oracle.com> References: <1202375945-29525-1-git-send-email-jens.axboe@oracle.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3061 Lines: 93 Signed-off-by: Jens Axboe --- arch/x86/kernel/smp_32.c | 15 +++++++++++++++ arch/x86/kernel/smpboot_32.c | 3 +++ include/asm-x86/hw_irq_32.h | 1 + include/asm-x86/mach-default/entry_arch.h | 1 + include/asm-x86/mach-default/irq_vectors.h | 1 + 5 files changed, 21 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/smp_32.c b/arch/x86/kernel/smp_32.c index dc0cde9..668b8a4 100644 --- a/arch/x86/kernel/smp_32.c +++ b/arch/x86/kernel/smp_32.c @@ -672,6 +672,21 @@ void smp_call_function_interrupt(struct pt_regs *regs) } } +fastcall void smp_raise_block_softirq(struct pt_regs *regs) +{ + unsigned long flags; + + ack_APIC_irq(); + local_irq_save(flags); + raise_softirq_irqoff(BLOCK_SOFTIRQ); + local_irq_restore(flags); +} + +void arch_raise_softirq_on_cpu(int cpu, unsigned int nr) +{ + send_IPI_mask(cpumask_of_cpu(cpu), BLOCK_SOFTIRQ_VECTOR); +} + static int convert_apicid_to_cpu(int apic_id) { int i; diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c index 579b9b7..ca35697 100644 --- a/arch/x86/kernel/smpboot_32.c +++ b/arch/x86/kernel/smpboot_32.c @@ -1304,6 +1304,9 @@ void __init smp_intr_init(void) /* IPI for generic function call */ set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt); + + /* IPI for scheduling block softirq */ + set_intr_gate(BLOCK_SOFTIRQ_VECTOR, raise_block_softirq); } /* diff --git a/include/asm-x86/hw_irq_32.h b/include/asm-x86/hw_irq_32.h index ea88054..0a053d8 100644 --- a/include/asm-x86/hw_irq_32.h +++ b/include/asm-x86/hw_irq_32.h @@ -32,6 +32,7 @@ extern void (*const interrupt[NR_IRQS])(void); void reschedule_interrupt(void); void invalidate_interrupt(void); void call_function_interrupt(void); +void raise_block_softirq(void); #endif #ifdef CONFIG_X86_LOCAL_APIC diff --git a/include/asm-x86/mach-default/entry_arch.h b/include/asm-x86/mach-default/entry_arch.h index bc86146..e96ed61 100644 --- a/include/asm-x86/mach-default/entry_arch.h +++ b/include/asm-x86/mach-default/entry_arch.h @@ -13,6 +13,7 @@ BUILD_INTERRUPT(reschedule_interrupt,RESCHEDULE_VECTOR) BUILD_INTERRUPT(invalidate_interrupt,INVALIDATE_TLB_VECTOR) BUILD_INTERRUPT(call_function_interrupt,CALL_FUNCTION_VECTOR) +BUILD_INTERRUPT(raise_block_softirq,BLOCK_SOFTIRQ_VECTOR); #endif /* diff --git a/include/asm-x86/mach-default/irq_vectors.h b/include/asm-x86/mach-default/irq_vectors.h index 881c63c..f7535a3 100644 --- a/include/asm-x86/mach-default/irq_vectors.h +++ b/include/asm-x86/mach-default/irq_vectors.h @@ -48,6 +48,7 @@ #define INVALIDATE_TLB_VECTOR 0xfd #define RESCHEDULE_VECTOR 0xfc #define CALL_FUNCTION_VECTOR 0xfb +#define BLOCK_SOFTIRQ_VECTOR 0xfa #define THERMAL_APIC_VECTOR 0xf0 /* -- 1.5.4.22.g7a20 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/