Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754661AbbKBVdk (ORCPT ); Mon, 2 Nov 2015 16:33:40 -0500 Received: from o1.f.az.sendgrid.net ([208.117.55.132]:63840 "EHLO o1.f.az.sendgrid.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754316AbbKBVdc (ORCPT ); Mon, 2 Nov 2015 16:33:32 -0500 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, tglx@redhat.com, haiyangz@microsoft.com, marc.zyngier@arm.com, bhelgaas@google.com, linux-pci@vger.kernel.org Cc: Jake Oshins Subject: [PATCH v6 1/7] drivers:hv: Export a function that maps Linux CPU num onto Hyper-V proc num Date: Mon, 2 Nov 2015 21:33:10 +0000 Message-Id: <1446499996-1350-2-git-send-email-jakeo@microsoft.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1446499996-1350-1-git-send-email-jakeo@microsoft.com> References: <1446499996-1350-1-git-send-email-jakeo@microsoft.com> X-SendGrid-Contentd-ID: {"test_id":"1446500011"} X-SG-EID: UsLXQ589HNP4HLBydmD9pgHURQozLYm9XliudupI8YvT2QznYKrpsL3Hxa0cS1KvuX0nftXcbILQrb pzjvL9r5mHggBpHImdBVE5+TuavFXFFAZ9vm/H0jhQ0GCLCzJhzZzmvdWKlN1hfu8Ltsc0D2Hr2tkn Or08ytmgiAqgImuJzHpVEMrOg1Cb3Z6vP39A Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2081 Lines: 62 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 processor 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 * -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/