From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933090AbbLNWgq (ORCPT ); Mon, 14 Dec 2015 17:36:46 -0500 Received: from p3plsmtps2ded03.prod.phx3.secureserver.net ([208.109.80.60]:55348 "EHLO p3plsmtps2ded03.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753606AbbLNW2X (ORCPT ); Mon, 14 Dec 2015 17:28:23 -0500 x-originating-ip: 72.167.245.219 From: "K. Y. Srinivasan" To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com Cc: Jake Oshins , "K. Y. Srinivasan" Subject: [PATCH RESEND 08/27] drivers:hv: Export a function that maps Linux CPU num onto Hyper-V proc num Date: Mon, 14 Dec 2015 16:01:39 -0800 Message-Id: <1450137718-26366-8-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1450137718-26366-1-git-send-email-kys@microsoft.com> References: <1450137698-26327-1-git-send-email-kys@microsoft.com> <1450137718-26366-1-git-send-email-kys@microsoft.com> X-CMAE-Envelope: MS4wfKWS+k/TzIRqqUgOZajQz4GeoVM+oEN+UwL+BfVsGJqlcf6laA94VDr/XsqfuzCgAnOuqec7lTWXJBtHSgka4oDlLbaabkXAiuFYG42TdfFawgPdHkfF Wt0ZjYGBxnWrj21KOeBXlH8IXo6C67QQszwxI7nl1lVtnIiJ4C0UAx5XFj/ElBV4XZDx3vdWq0GKOJ2B6ITviDTcaQs99A7aYbDcr8yc+dLGiDXj+llOQOBY vJqlTPt9fFviOlQm9+2trPu7eMEjDRuePU7H7Ns1h26VfXZt+tfdsUtZbBL/RaFPjEGL7gwkul6UxKYF2nxvVmkI3kOjLJwHjr7B8s+UFQ77wW+kmTWA0SdV 8ZJDVFZ/Rhs4eVjQfK5c6qo/9AZ5RpExAtJoGO0c6zGsi/o/vN6MHwvfDmQ452i8p8PBPX2lGRh60nadzth18lxf1pUcYg== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: K. Y. Srinivasan --- drivers/hv/vmbus_drv.c | 17 +++++++++++++++++ include/linux/hyperv.h | 2 ++ 2 files changed, 19 insertions(+), 0 deletions(-) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 3297731..c01b689 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1193,6 +1193,23 @@ 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 8fdc17b..fddb3e0 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -983,6 +983,8 @@ 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 * -- 1.7.4.1