84135d3d18
At the moment we have separate system register emulation handlers for each timer register. Actually they are quite similar, and we rely on kvm_arm_timer_[gs]et_reg() for the actual emulation anyways, so let's just merge all of those handlers into one function, which just marshalls the arguments and then hands off to a set of common accessors. This makes extending the emulation to include EL2 timers much easier. Signed-off-by: Andre Przywara <andre.przywara@arm.com> [Fixed 32-bit VM breakage and reduced to reworking existing code] Signed-off-by: Christoffer Dall <christoffer.dall@arm.com> [Fixed 32bit host, general cleanup] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/*
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* Copyright (C) 2012 ARM Ltd.
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __ASM_ARM_KVM_ARCH_TIMER_H
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#define __ASM_ARM_KVM_ARCH_TIMER_H
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#include <linux/clocksource.h>
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#include <linux/hrtimer.h>
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enum kvm_arch_timers {
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TIMER_PTIMER,
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TIMER_VTIMER,
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NR_KVM_TIMERS
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};
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enum kvm_arch_timer_regs {
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TIMER_REG_CNT,
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TIMER_REG_CVAL,
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TIMER_REG_TVAL,
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TIMER_REG_CTL,
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};
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struct arch_timer_context {
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/* Registers: control register, timer value */
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u32 cnt_ctl;
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u64 cnt_cval;
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/* Timer IRQ */
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struct kvm_irq_level irq;
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/*
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* We have multiple paths which can save/restore the timer state
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* onto the hardware, so we need some way of keeping track of
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* where the latest state is.
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*
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* loaded == true: State is loaded on the hardware registers.
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* loaded == false: State is stored in memory.
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*/
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bool loaded;
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/* Virtual offset */
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u64 cntvoff;
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};
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struct arch_timer_cpu {
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struct arch_timer_context vtimer;
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struct arch_timer_context ptimer;
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/* Background timer used when the guest is not running */
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struct hrtimer bg_timer;
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/* Physical timer emulation */
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struct hrtimer phys_timer;
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/* Is the timer enabled */
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bool enabled;
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};
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int kvm_timer_hyp_init(bool);
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int kvm_timer_enable(struct kvm_vcpu *vcpu);
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int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);
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void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
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void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
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bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu);
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void kvm_timer_update_run(struct kvm_vcpu *vcpu);
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void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
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u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
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int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
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int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
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int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
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int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
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bool kvm_timer_is_pending(struct kvm_vcpu *vcpu);
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u64 kvm_phys_timer_read(void);
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void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);
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void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
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void kvm_timer_init_vhe(void);
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bool kvm_arch_timer_get_input_level(int vintid);
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#define vcpu_vtimer(v) (&(v)->arch.timer_cpu.vtimer)
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#define vcpu_ptimer(v) (&(v)->arch.timer_cpu.ptimer)
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#define vcpu_get_timer(v,t) \
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(t == TIMER_VTIMER ? vcpu_vtimer(v) : vcpu_ptimer(v))
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u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu,
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enum kvm_arch_timers tmr,
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enum kvm_arch_timer_regs treg);
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void kvm_arm_timer_write_sysreg(struct kvm_vcpu *vcpu,
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enum kvm_arch_timers tmr,
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enum kvm_arch_timer_regs treg,
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u64 val);
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#endif
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