| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | /* |
| 35 | * We have multiple paths which can save/restore the timer state |
| 36 | * onto the hardware, so we need some way of keeping track of |
| 37 | * where the latest state is. |
| 38 | * |
| 39 | * loaded == true: State is loaded on the hardware registers. |
| 40 | * loaded == false: State is stored in memory. |
| 41 | */ |
| 42 | bool loaded; |
| 43 | |
| 44 | /* Virtual offset */ |
| 45 | u64 cntvoff; |
| 46 | }; |
| 47 | |
| 48 | struct arch_timer_cpu { |
| 49 | struct arch_timer_context vtimer; |
| 50 | struct arch_timer_context ptimer; |
| 51 | |
| 52 | /* Background timer used when the guest is not running */ |
| 53 | struct hrtimer bg_timer; |
| 54 | |
| 55 | /* Work queued with the above timer expires */ |
| 56 | struct work_struct expired; |
| 57 | |
| 58 | /* Physical timer emulation */ |
| 59 | struct hrtimer phys_timer; |
| 60 | |
| 61 | /* Is the timer enabled */ |
| 62 | bool enabled; |
| 63 | }; |
| 64 | |
| 65 | int kvm_timer_hyp_init(bool); |
| 66 | int kvm_timer_enable(struct kvm_vcpu *vcpu); |
| 67 | int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu); |
| 68 | void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu); |
| 69 | void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu); |
| 70 | bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu); |
| 71 | void kvm_timer_update_run(struct kvm_vcpu *vcpu); |
| 72 | void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu); |
| 73 | |
| 74 | u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid); |
| 75 | int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value); |
| 76 | |
| 77 | int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); |
| 78 | int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); |
| 79 | int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); |
| 80 | |
| 81 | bool kvm_timer_is_pending(struct kvm_vcpu *vcpu); |
| 82 | |
| 83 | void kvm_timer_schedule(struct kvm_vcpu *vcpu); |
| 84 | void kvm_timer_unschedule(struct kvm_vcpu *vcpu); |
| 85 | |
| 86 | u64 kvm_phys_timer_read(void); |
| 87 | |
| 88 | void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu); |
| 89 | void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu); |
| 90 | |
| 91 | void kvm_timer_init_vhe(void); |
| 92 | |
| 93 | bool kvm_arch_timer_get_input_level(int vintid); |
| 94 | |
| 95 | #define vcpu_vtimer(v) (&(v)->arch.timer_cpu.vtimer) |
| 96 | #define vcpu_ptimer(v) (&(v)->arch.timer_cpu.ptimer) |
| 97 | |
| 98 | #endif |