1 /* 2 * Copyright (C) 2012 ARM Ltd. 3 * Author: Marc Zyngier <marc.zyngier@arm.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 19 #ifndef __ASM_ARM_KVM_ARCH_TIMER_H 20 #define __ASM_ARM_KVM_ARCH_TIMER_H 21 22 #include <linux/clocksource.h> 23 #include <linux/hrtimer.h> 24 #include <linux/workqueue.h> 25 26 struct arch_timer_kvm { 27 /* Virtual offset */ 28 cycle_t cntvoff; 29 }; 30 31 struct arch_timer_cpu { 32 /* Registers: control register, timer value */ 33 u32 cntv_ctl; /* Saved/restored */ 34 cycle_t cntv_cval; /* Saved/restored */ 35 36 /* 37 * Anything that is not used directly from assembly code goes 38 * here. 39 */ 40 41 /* Background timer used when the guest is not running */ 42 struct hrtimer timer; 43 44 /* Work queued with the above timer expires */ 45 struct work_struct expired; 46 47 /* Background timer active */ 48 bool armed; 49 50 /* Timer IRQ */ 51 struct kvm_irq_level irq; 52 53 /* Active IRQ state caching */ 54 bool active_cleared_last; 55 56 /* Is the timer enabled */ 57 bool enabled; 58 }; 59 60 int kvm_timer_hyp_init(void); 61 int kvm_timer_enable(struct kvm_vcpu *vcpu); 62 void kvm_timer_init(struct kvm *kvm); 63 int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, 64 const struct kvm_irq_level *irq); 65 void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu); 66 void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu); 67 void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu); 68 void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu); 69 70 u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid); 71 int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value); 72 73 bool kvm_timer_should_fire(struct kvm_vcpu *vcpu); 74 void kvm_timer_schedule(struct kvm_vcpu *vcpu); 75 void kvm_timer_unschedule(struct kvm_vcpu *vcpu); 76 77 void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu); 78 79 #endif 80