Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752092AbdF1PFJ (ORCPT ); Wed, 28 Jun 2017 11:05:09 -0400 Received: from foss.arm.com ([217.140.101.70]:42894 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751611AbdF1PEo (ORCPT ); Wed, 28 Jun 2017 11:04:44 -0400 From: Marc Zyngier To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Cc: Christoffer Dall , Thomas Gleixner , Jason Cooper , Eric Auger , Shanker Donthineni , Mark Rutland Subject: [PATCH v2 01/52] genirq: Let irq_set_vcpu_affinity() iterate over hierarchy Date: Wed, 28 Jun 2017 16:03:20 +0100 Message-Id: <20170628150411.15846-2-marc.zyngier@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170628150411.15846-1-marc.zyngier@arm.com> References: <20170628150411.15846-1-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1172 Lines: 40 When assigning an interrupt to a vcpu, it is not unlikely that the level of the hierarchy implementing irq_set_vcpu_affinity is not the top level (think a generic MSI domain on top of a virtualization aware interrupt controller). In such a case, let's iterate over the hierarchy until we find an irqchip implementing it. Signed-off-by: Marc Zyngier --- kernel/irq/manage.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 425170d4439b..804fb94e86e6 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -431,8 +431,18 @@ int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info) return -EINVAL; data = irq_desc_get_irq_data(desc); - chip = irq_data_get_irq_chip(data); - if (chip && chip->irq_set_vcpu_affinity) + do { + chip = irq_data_get_irq_chip(data); + if (chip && chip->irq_set_vcpu_affinity) + break; +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + data = data->parent_data; +#else + data = NULL; +#endif + } while (data); + + if (data) ret = chip->irq_set_vcpu_affinity(data, vcpu_info); irq_put_desc_unlock(desc, flags); -- 2.11.0