From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752266Ab2LAO3w (ORCPT ); Sat, 1 Dec 2012 09:29:52 -0500 Received: from p3plsmtps2ded01.prod.phx3.secureserver.net ([208.109.80.58]:33177 "EHLO p3plsmtps2ded01.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752464Ab2LAO2k (ORCPT ); Sat, 1 Dec 2012 09:28:40 -0500 X-Greylist: delayed 300 seconds by postgrey-1.27 at vger.kernel.org; Sat, 01 Dec 2012 09:28:39 EST x-originating-ip: 72.167.245.219 From: "K. Y. Srinivasan" To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com Cc: "K. Y. Srinivasan" Subject: [PATCH 23/28] Drivers: hv: Handle vmbus interrupts concurrently on all cpus Date: Sat, 1 Dec 2012 06:46:54 -0800 Message-Id: <1354373219-31374-23-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1354373219-31374-1-git-send-email-kys@microsoft.com> References: <1354373160-31332-1-git-send-email-kys@microsoft.com> <1354373219-31374-1-git-send-email-kys@microsoft.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Vmbus interrupts are unique in that while the interrupt is delivered on a given vector, these can be handled concurrently on different CPUs. Handle the vmbus interrupts concurrently on all the CPUs. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang --- drivers/hv/hv.c | 2 +- drivers/hv/vmbus_drv.c | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+), 1 deletions(-) diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 363532a..03e6a1e 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -335,7 +335,7 @@ void hv_synic_init(void *irqarg) shared_sint.as_uint64 = 0; shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */ shared_sint.masked = false; - shared_sint.auto_eoi = false; + shared_sint.auto_eoi = true; wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 6e4f857..e066d41 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include #include "hyperv_vmbus.h" @@ -501,6 +502,19 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id) } /* + * vmbus interrupt flow handler: + * vmbus interrupts can concurrently occur on multiple CPUs and + * can be handled concurrently. + */ + +void vmbus_flow_handler(unsigned int irq, struct irq_desc *desc) +{ + kstat_incr_irqs_this_cpu(irq, desc); + + desc->action->handler(irq, desc->action->dev_id); +} + +/* * vmbus_bus_init -Main vmbus driver initialization routine. * * Here, we @@ -535,6 +549,13 @@ static int vmbus_bus_init(int irq) goto err_unregister; } + /* + * Vmbus interrupts can be handled concurrently on + * different CPUs. Establish an appropriate interrupt flow + * handler that can support this model. + */ + irq_set_handler(irq, vmbus_flow_handler); + vector = IRQ0_VECTOR + irq; /* -- 1.7.4.1