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