1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * KVM/MIPS: Interrupt delivery
7 *
8 * Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
9 * Authors: Sanjay Lal <sanjayl@kymasys.com>
10 */
11
12#include <linux/errno.h>
13#include <linux/err.h>
14#include <linux/vmalloc.h>
15#include <linux/fs.h>
16#include <linux/memblock.h>
17#include <asm/page.h>
18#include <asm/cacheflush.h>
19
20#include <linux/kvm_host.h>
21
22#include "interrupt.h"
23
24void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, u32 cause)
25{
26	unsigned long *pending = &vcpu->arch.pending_exceptions;
27	unsigned long *pending_clr = &vcpu->arch.pending_exceptions_clr;
28	unsigned int priority;
29
30	if (!(*pending) && !(*pending_clr))
31		return;
32
33	priority = __ffs(*pending_clr);
34	while (priority <= MIPS_EXC_MAX) {
35		kvm_mips_callbacks->irq_clear(vcpu, priority, cause);
36
37		priority = find_next_bit(pending_clr,
38					 BITS_PER_BYTE * sizeof(*pending_clr),
39					 priority + 1);
40	}
41
42	priority = __ffs(*pending);
43	while (priority <= MIPS_EXC_MAX) {
44		kvm_mips_callbacks->irq_deliver(vcpu, priority, cause);
45
46		priority = find_next_bit(pending,
47					 BITS_PER_BYTE * sizeof(*pending),
48					 priority + 1);
49	}
50
51}
52
53int kvm_mips_pending_timer(struct kvm_vcpu *vcpu)
54{
55	return test_bit(MIPS_EXC_INT_TIMER, &vcpu->arch.pending_exceptions);
56}
57