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_context { 27 /* Registers: control register, timer value */ 28 u32 cnt_ctl; 29 u64 cnt_cval; 30 31 /* Timer IRQ */ 32 struct kvm_irq_level irq; 33 34 /* Active IRQ state caching */ 35 bool active_cleared_last; 36 37 /* Virtual offset */ 38 u64 cntvoff; 39 }; 40 41 struct arch_timer_cpu { 42 struct arch_timer_context vtimer; 43 struct arch_timer_context ptimer; 44 45 /* Background timer used when the guest is not running */ 46 struct hrtimer timer; 47 48 /* Work queued with the above timer expires */ 49 struct work_struct expired; 50 51 /* Background timer active */ 52 bool armed; 53 54 /* Is the timer enabled */ 55 bool enabled; 56 }; 57 58 int kvm_timer_hyp_init(void); 59 int kvm_timer_enable(struct kvm_vcpu *vcpu); 60 int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, 61 const struct kvm_irq_level *virt_irq, 62 const struct kvm_irq_level *phys_irq); 63 void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu); 64 void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu); 65 void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu); 66 void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu); 67 68 u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid); 69 int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value); 70 71 bool kvm_timer_should_fire(struct arch_timer_context *timer_ctx); 72 void kvm_timer_schedule(struct kvm_vcpu *vcpu); 73 void kvm_timer_unschedule(struct kvm_vcpu *vcpu); 74 75 u64 kvm_phys_timer_read(void); 76 77 void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu); 78 79 void kvm_timer_init_vhe(void); 80 81 #define vcpu_vtimer(v) (&(v)->arch.timer_cpu.vtimer) 82 #define vcpu_ptimer(v) (&(v)->arch.timer_cpu.ptimer) 83 #endif 84