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1df08ba0aa
For correct guest suspend/resume behaviour we need to ensure we include the generic timer registers for 64 bit guests. As CONFIG_KVM_ARM_TIMER is always set for arm64 we don't need to worry about null implementations. However I have re-jigged the kvm_arm_timer_set/get_reg declarations to be in the common include/kvm/arm_arch_timer.h headers. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
104 lines
2.8 KiB
C
104 lines
2.8 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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#include <linux/workqueue.h>
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struct arch_timer_kvm {
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#ifdef CONFIG_KVM_ARM_TIMER
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/* Is the timer enabled */
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bool enabled;
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/* Virtual offset */
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cycle_t cntvoff;
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#endif
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};
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struct arch_timer_cpu {
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#ifdef CONFIG_KVM_ARM_TIMER
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/* Registers: control register, timer value */
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u32 cntv_ctl; /* Saved/restored */
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cycle_t cntv_cval; /* Saved/restored */
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/*
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* Anything that is not used directly from assembly code goes
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* here.
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*/
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/* Background timer used when the guest is not running */
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struct hrtimer timer;
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/* Work queued with the above timer expires */
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struct work_struct expired;
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/* Background timer active */
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bool armed;
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/* Timer IRQ */
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const struct kvm_irq_level *irq;
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#endif
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};
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#ifdef CONFIG_KVM_ARM_TIMER
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int kvm_timer_hyp_init(void);
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int kvm_timer_init(struct kvm *kvm);
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void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
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const struct kvm_irq_level *irq);
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void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
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void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
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void kvm_timer_sync_hwstate(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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#else
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static inline int kvm_timer_hyp_init(void)
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{
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return 0;
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};
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static inline int kvm_timer_init(struct kvm *kvm)
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{
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return 0;
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}
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static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
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const struct kvm_irq_level *irq) {}
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static inline void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) {}
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static inline void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu) {}
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static inline void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu) {}
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static inline void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu) {}
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static inline int kvm_arm_timer_set_reg(struct kvm_vcpu *vcpu, u64 regid, u64 value)
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{
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return 0;
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}
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static inline u64 kvm_arm_timer_get_reg(struct kvm_vcpu *vcpu, u64 regid)
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{
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return 0;
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}
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#endif
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#endif
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