From patchwork Fri Sep 11 00:01:04 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jake Oshins X-Patchwork-Id: 7156521 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 807239F314 for ; Fri, 11 Sep 2015 00:11:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C1645206EB for ; Fri, 11 Sep 2015 00:11:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA5E920489 for ; Fri, 11 Sep 2015 00:11:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752010AbbIKAKq (ORCPT ); Thu, 10 Sep 2015 20:10:46 -0400 Received: from o1.f.az.sendgrid.net ([208.117.55.132]:32963 "EHLO o1.f.az.sendgrid.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751725AbbIKAJl (ORCPT ); Thu, 10 Sep 2015 20:09:41 -0400 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sendgrid.me; h=from:to:cc:subject:in-reply-to:references; s=smtpapi; bh=v9+UQGN2rra3pvmuayA/HPpUMw4=; b=nA3zvX6akqsnI3UDBk2gI1inyaSs+ gsHHFB/3YmaUoiUu81NLB1VYJD4Fyvxskn1mO8R5T/XNRn/xW1zXzMp6HEmQNkKS B+ftttxIRVZZHWUwm3qn4CqcO2NxhnWP7yggiBifHU7DHnG43JND6t3j9B+kVJoR mlz+kZ01kWljcI= Received: by filter-487.sjc1.sendgrid.net with SMTP id filter-487.7895.55F21A8D23 2015-09-11 00:04:30.190325319 +0000 UTC Received: from jakeoshinsu2.jakeoshinsu2.d1.internal.cloudapp.net (unknown [104.210.40.47]) by ismtpd-046 (SG) with ESMTP id 14fb9b7b9af.502f.1adba27 Fri, 11 Sep 2015 00:04:29 +0000 (UTC) From: jakeo@microsoft.com To: gregkh@linuxfoundation.org, kys@microsoft.com, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, linux-pci@vger.kernel.org, bhelgaas@google.com, tglx@linutronix.de Cc: Jake Oshins Subject: [PATCH v2 05/12] drivers:hv: Export a function that maps Linux CPU num onto Hyper-V proc num Date: Fri, 11 Sep 2015 00:01:04 +0000 Message-Id: <1441929670-10058-6-git-send-email-jakeo@microsoft.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1441929670-10058-1-git-send-email-jakeo@microsoft.com> References: <1441929670-10058-1-git-send-email-jakeo@microsoft.com> X-SG-EID: lfnueJVzSjg1mfuVqqukVH7tZvRy9mfCIcBnfbfzaMMWVgeXPdEksBJQKTtitQJWsZnVjf9aO/ylub hm83wuZUpyihWPpJl03K54Vx5RUvNzO3LdSjB4qiXZaZ80tkH7zqbYa3SxITuH4CmiFdh/eyYy41sY Fbciam5JFkQK76A= Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-6.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY, URIBL_GREY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jake Oshins This patch exposes the mapping between Linux CPU number and Hyper-V virtual processor number. This is necessary because the hypervisor needs to know which virtual processors to target when making a mapping in the Interrupt Redirection Table in the I/O MMU. Signed-off-by: Jake Oshins --- drivers/hv/vmbus_drv.c | 17 +++++++++++++++++ include/linux/hyperv.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index f19b6f7..c89d0e5 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1191,6 +1191,23 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, } EXPORT_SYMBOL_GPL(vmbus_allocate_mmio); +/** + * vmbus_cpu_number_to_vp_number() - Map CPU to VP. + * @cpu_number: CPU number in Linux terms + * + * This function returns the mapping between the Linux processor + * number and the hypervisor's virtual processor number, useful + * in making hypercalls and such that talk about specific + * processors. + * + * Return: Virtual processor number in Hyper-V terms + */ +int vmbus_cpu_number_to_vp_number(int cpu_number) +{ + return hv_context.vp_index[cpu_number]; +} +EXPORT_SYMBOL_GPL(vmbus_cpu_number_to_vp_number); + static int vmbus_acpi_add(struct acpi_device *device) { acpi_status result; diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 54733d5..02393b6 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -982,6 +982,8 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, resource_size_t size, resource_size_t align, bool fb_overlap_ok); +int vmbus_cpu_number_to_vp_number(int cpu_number); + /** * VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device *