From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755550AbdCXSKr (ORCPT ); Fri, 24 Mar 2017 14:10:47 -0400 Received: from a2nlsmtp01-04.prod.iad2.secureserver.net ([198.71.225.38]:54368 "EHLO a2nlsmtp01-04.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932980AbdCXSIn (ORCPT ); Fri, 24 Mar 2017 14:08:43 -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: hv: Fix a bug in specifying CPU affinity Date: Fri, 24 Mar 2017 11:07:20 -0700 Message-Id: <1490378842-26950-1-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: MS4wfIpvpZR9TnxL/oe/Lx4e8gs5Sl5xbO5vToUUHSFVINetMB2apnM5czxOAVXoP2BL0BgPr1Exx5FwrIOnq/HecU2DnfNVFuDBeIxCCgyXzGKhQzE1tphI xBXigJ53ppoQcCdZpAxZktA+N4lVFyPBXob8Wo1lNKtj5r1iBksUOk7w8IJNFmR9GXNhkmwXk3q3BOTiodnAbDgIx2LIFyq8LEKeXmhUjHaqDmpfU6s7VlWz 5+xjcr60Q03VfolIW5hXyXMTHWzmXOZtm15RjR3j0wrYUYUtgDjrRoFGt0j7hWPns+E1kcrDs+QU+MARS0f35pD9qu9ABZzCCk/gphB5Fw6uPtmy0Z0YuDyt BvKTaXx82ZcPJbPTSBCXEOiFB9vPQEG9zq9HnjkFuH+Bj7PvDVavB3/g0QSkag6pT87GRKz/cEtOs1xXnSUegyQGrYevSub4x9jiaPtGrof0pZhwspjNjEYT 4Yx1LeUEOL2JqUUXMovM4MpmtMlf94bZvPz7TFiPpsAiR+ZMfjjxD5AXjFOlmjUtYf0c2oh8GgOrZB/FLQpmKGuqKtlR+wuT76tB+LxfODqWfXc8I3HDC2jU 5YE= 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 | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c index ada9856..2c2ea1e 100644 --- a/drivers/pci/host/pci-hyperv.c +++ b/drivers/pci/host/pci-hyperv.c @@ -897,9 +897,13 @@ 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 = -1ULL; + } 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