From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755219AbbLJRyy (ORCPT ); Thu, 10 Dec 2015 12:54:54 -0500 Received: from o1.f.az.sendgrid.net ([208.117.55.132]:49088 "EHLO o1.f.az.sendgrid.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754868AbbLJRxa (ORCPT ); Thu, 10 Dec 2015 12:53:30 -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@linutronix.de, haiyangz@microsoft.com, marc.zyngier@arm.com, bhelgaas@google.com, linux-pci@vger.kernel.org Cc: Jake Oshins Subject: [PATCH v10 2/7] drivers:hv: Export hv_do_hypercall() Date: Thu, 10 Dec 2015 17:52:58 +0000 Message-Id: <1449769983-12948-3-git-send-email-jakeo@microsoft.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1449769983-12948-1-git-send-email-jakeo@microsoft.com> References: <1449769983-12948-1-git-send-email-jakeo@microsoft.com> X-SG-EID: UsLXQ589HNP4HLBydmD9pgHURQozLYm9XliudupI8YuGhK5onCskqw8PshRT7CACuH4YQMbZeK/soa FeEeLhi6Bb9/eINN9FyUGCYS7l+5n1AjlTMCYlwlBqOGdV6lEw3dXy7XnozVy5IYkUXIlvfY6zdJlX l9zBp0w3uw841qMPbZ3vzyCBKNg8CEphXr+Z3nRYlhTLwUB3PWNanLV6NQ== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jake Oshins This patch exposes the function that hv_vmbus.ko uses to make hypercalls. This is necessary for retargeting an interrupt when it is given a new affinity and vector. Signed-off-by: Jake Oshins --- drivers/hv/hv.c | 20 ++++++++++---------- drivers/hv/hyperv_vmbus.h | 2 +- include/linux/hyperv.h | 1 + 3 files changed, 12 insertions(+), 11 deletions(-) diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 6341be8..7a06933 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -89,9 +89,9 @@ static int query_hypervisor_info(void) } /* - * do_hypercall- Invoke the specified hypercall + * hv_do_hypercall- Invoke the specified hypercall */ -static u64 do_hypercall(u64 control, void *input, void *output) +u64 hv_do_hypercall(u64 control, void *input, void *output) { u64 input_address = (input) ? virt_to_phys(input) : 0; u64 output_address = (output) ? virt_to_phys(output) : 0; @@ -132,6 +132,7 @@ static u64 do_hypercall(u64 control, void *input, void *output) return hv_status_lo | ((u64)hv_status_hi << 32); #endif /* !x86_64 */ } +EXPORT_SYMBOL_GPL(hv_do_hypercall); #ifdef CONFIG_X86_64 static cycle_t read_hv_clock_tsc(struct clocksource *arg) @@ -315,7 +316,7 @@ int hv_post_message(union hv_connection_id connection_id, { struct hv_input_post_message *aligned_msg; - u16 status; + u64 status; if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) return -EMSGSIZE; @@ -329,11 +330,10 @@ int hv_post_message(union hv_connection_id connection_id, aligned_msg->payload_size = payload_size; memcpy((void *)aligned_msg->payload, payload, payload_size); - status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL) - & 0xFFFF; + status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL); put_cpu(); - return status; + return status & 0xFFFF; } @@ -343,13 +343,13 @@ int hv_post_message(union hv_connection_id connection_id, * * This involves a hypercall. */ -u16 hv_signal_event(void *con_id) +int hv_signal_event(void *con_id) { - u16 status; + u64 status; - status = (do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF); + status = hv_do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL); - return status; + return status & 0xFFFF; } static int hv_ce_set_next_event(unsigned long delta, diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 3782636..cc2fb53 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -582,7 +582,7 @@ extern int hv_post_message(union hv_connection_id connection_id, enum hv_message_type message_type, void *payload, size_t payload_size); -extern u16 hv_signal_event(void *con_id); +extern int hv_signal_event(void *con_id); extern int hv_synic_alloc(void); diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index fddb3e0..24d0b65 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -984,6 +984,7 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, bool fb_overlap_ok); int vmbus_cpu_number_to_vp_number(int cpu_number); +u64 hv_do_hypercall(u64 control, void *input, void *output); /** * VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device -- 1.9.1