From patchwork Fri Mar 24 18:07:20 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: kys@exchange.microsoft.com X-Patchwork-Id: 9643587 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 370F160328 for ; Fri, 24 Mar 2017 18:10:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2E315201BD for ; Fri, 24 Mar 2017 18:10:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 22FF426E16; Fri, 24 Mar 2017 18:10:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.4 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BFD79269DA for ; Fri, 24 Mar 2017 18:10:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932871AbdCXSKi (ORCPT ); Fri, 24 Mar 2017 14:10:38 -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 Received: from linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with SMTP id rTcRcUB3NjofZrTcRch6A7; Fri, 24 Mar 2017 11:07:25 -0700 x-originating-ip: 107.180.71.197 Received: from kys by linuxonhyperv.com with local (Exim 4.88) (envelope-from ) id 1crTcR-00071J-Rw; Fri, 24 Mar 2017 11:07:23 -0700 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-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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,