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
24 void 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
53 int kvm_mips_pending_timer(struct kvm_vcpu *vcpu)
54 {
55 return test_bit(MIPS_EXC_INT_TIMER, &vcpu->arch.pending_exceptions);
56 }
57
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.