From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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, bhelgaas@google.com, linux-pci@vger.kernel.org, pebolle@tiscali.nl, haiyangz@microsoft.com, mebersol@microsoft.com Cc: Jake Oshins Subject: [PATCH v2 4/6] drivers:hv: Export a function that maps Linux proc num onto Hyper-V proc num Date: Mon, 15 Jun 2015 17:06:37 +0000 Message-Id: <1434387999-1885-5-git-send-email-jakeo@microsoft.com> In-Reply-To: <1434387999-1885-1-git-send-email-jakeo@microsoft.com> References: <1434387999-1885-1-git-send-email-jakeo@microsoft.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: From: Jake Oshins This patch exports a function which maps Linux processor number onto Hyper-V virtual processor number. This is necessary in order to map message- signaled interrupts (MSIs) into a VM, as the hypervisor needs to know the right target VP. Signed-off-by: Jake Oshins --- drivers/hv/vmbus_drv.c | 16 ++++++++++++++++ include/linux/hyperv.h | 2 ++ 2 files changed, 18 insertions(+) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 067a469..65e4eb6 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1158,6 +1158,22 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, } EXPORT_SYMBOL_GPL(vmbus_allocate_mmio); +/** + * 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. + * + * @param procnum - in Linux terms + * + * @return int - in Hyper-V terms + */ +int vmbus_procnum_to_vpnum(int procnum) +{ + return hv_context.vp_index[procnum]; +} +EXPORT_SYMBOL_GPL(vmbus_procnum_to_vpnum); + 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 ffd98d7..6fec42d 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -987,6 +987,8 @@ 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_procnum_to_vpnum(int procnum); + /** * VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device * -- 1.9.1