From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934985AbdCXSI6 (ORCPT ); Fri, 24 Mar 2017 14:08:58 -0400 Received: from a2nlsmtp01-05.prod.iad2.secureserver.net ([198.71.225.49]:35040 "EHLO a2nlsmtp01-05.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753808AbdCXSIc (ORCPT ); Fri, 24 Mar 2017 14:08:32 -0400 x-originating-ip: 107.180.71.197 From: kys@exchange.microsoft.com To: helgaas@kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com, leann.ogasawara@canonical.com, marcelo.cerri@canonical.com, sthemmin@microsoft.com Cc: "K. Y. Srinivasan" , Subject: [PATCH 1/2] pci-hyperv: Fix a bug in specifying CPU affinity Date: Fri, 24 Mar 2017 11:07:21 -0700 Message-Id: <1490378842-26950-2-git-send-email-kys@exchange.microsoft.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1490378800-26907-1-git-send-email-kys@exchange.microsoft.com> References: <1490378800-26907-1-git-send-email-kys@exchange.microsoft.com> Reply-To: kys@microsoft.com X-CMAE-Envelope: MS4wfBbTgKKKeGdLP1EuUTRUVSaBlCI92FPNbnznR1w2aQGL3t1khCszFZfTZ2COKdlRhomBeq7FGOA6u1jfMOTO9GpA+Qq0gWYZb5Z+YrJiP9/k57TvFR0/ 3s0KApj+HzwOfTsCd02mtF3YKFRVeWVy8l7zwBQZPtGsdGywo21QjD5cBGkQBMuXzRm7PHt9PKbKoG+Ooam5zFy9hDBLOiF7W9hR5zUIJ5lBsqR92QIDN8Fl Ng+2J86XNIROkrPudJhgafwOlG5AN7wUGaq2M6S1mlzc6SLXO13pM4JH7QWCeqzg+Bfwwxu8x6/LcC2xTVPYywdWjc0WBsmcn3UCLRvvas6xzIFx+nUOMjEj cGc7fCYxqAv5lnsJOCCyUT5YF1ZlZ47D4KxPvudyNOlrXomCm0zc8l+/LFfGL79CV0iJTS/7qmEn2ux3AJTnTRTogKxOLQTsWs0qz1VTaiegTwWZ9rlNsoHx hEbJhHRGBsE+P+uqWKlkulGYRggyR2aqtvnKBPwW7eAPEnol2Uu1qIISC/hHAF6yiUZZDJCEE1jATxGv/9ymPbSUI5BpzVReNGu7TJcr/HVMbFeLYoVrqf/C /iY= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: K. Y. Srinivasan When we have 32 or more CPUs in the affinity mask, we should use a special constant to specify that to the host. Fix this issue. Signed-off-by: K. Y. Srinivasan Cc: --- drivers/pci/host/pci-hyperv.c | 11 ++++++++--- 1 files changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c index ada9856..32a16fb 100644 --- a/drivers/pci/host/pci-hyperv.c +++ b/drivers/pci/host/pci-hyperv.c @@ -72,6 +72,7 @@ enum { PCI_PROTOCOL_VERSION_CURRENT = PCI_PROTOCOL_VERSION_1_1 }; +#define CPU_AFFINITY_ALL -1ULL #define PCI_CONFIG_MMIO_LENGTH 0x2000 #define CFG_PAGE_OFFSET 0x1000 #define CFG_PAGE_SIZE (PCI_CONFIG_MMIO_LENGTH - CFG_PAGE_OFFSET) @@ -897,9 +898,13 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) * processors because Hyper-V only supports 64 in a guest. */ affinity = irq_data_get_affinity_mask(data); - for_each_cpu_and(cpu, affinity, cpu_online_mask) { - int_pkt->int_desc.cpu_mask |= - (1ULL << vmbus_cpu_number_to_vp_number(cpu)); + if (cpumask_weight(affinity) >= 32) { + int_pkt->int_desc.cpu_mask = CPU_AFFINITY_ALL; + } else { + for_each_cpu_and(cpu, affinity, cpu_online_mask) { + int_pkt->int_desc.cpu_mask |= + (1ULL << vmbus_cpu_number_to_vp_number(cpu)); + } } ret = vmbus_sendpacket(hpdev->hbus->hdev->channel, int_pkt, -- 1.7.1