mirror of
https://github.com/projectacrn/acrn-hypervisor.git
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7a3a539b17
internal commit: 14ac2bc2299032fa6714d1fefa7cf0987b3e3085 Signed-off-by: Eddie Dong <eddie.dong@intel.com>
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <hypervisor.h>
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#include <hv_lib.h>
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#include <acrn_common.h>
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#include <hv_arch.h>
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#include <hv_debug.h>
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#include <irq.h>
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static struct dev_handler_node *notification_node;
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/* run in interrupt context */
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static int kick_notification(__unused int irq, __unused void *data)
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{
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/* Notification vector does not require handling here, it's just used
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* to kick taget cpu out of non-root mode.
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*/
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return 0;
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}
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static int request_notification_irq(dev_handler_t func, void *data,
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const char *name)
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{
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int irq = -1; /* system allocate */
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struct dev_handler_node *node = NULL;
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if (notification_node != NULL) {
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pr_info("%s, Notification vector already allocated on this CPU",
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__func__);
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return -EBUSY;
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}
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/* all cpu register the same notification vector */
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node = pri_register_handler(irq, VECTOR_NOTIFY_VCPU, func, data, name);
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if (node == NULL) {
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pr_err("Failed to add notify isr");
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return -1;
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}
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update_irq_handler(dev_to_irq(node), quick_handler_nolock);
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notification_node = node;
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return 0;
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}
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void setup_notification(void)
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{
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int cpu;
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char name[32] = {0};
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cpu = get_cpu_id();
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if (cpu > 0)
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return;
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/* support IPI notification, VM0 will register all CPU */
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snprintf(name, 32, "NOTIFY_ISR%d", cpu);
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if (request_notification_irq(kick_notification, NULL, name) < 0) {
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pr_err("Failed to setup notification");
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return;
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}
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dev_dbg(ACRN_DBG_PTIRQ, "NOTIFY: irq[%d] setup vector %x",
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dev_to_irq(notification_node),
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dev_to_vector(notification_node));
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}
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void cleanup_notification(void)
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{
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if (notification_node)
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unregister_handler_common(notification_node);
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notification_node = NULL;
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}
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