kvm_arch_timer.h 2.3 KB

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  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. #ifndef __ASM_ARM_KVM_ARCH_TIMER_H
  19. #define __ASM_ARM_KVM_ARCH_TIMER_H
  20. #include <linux/clocksource.h>
  21. #include <linux/hrtimer.h>
  22. #include <linux/workqueue.h>
  23. struct arch_timer_kvm {
  24. #ifdef CONFIG_KVM_ARM_TIMER
  25. /* Is the timer enabled */
  26. bool enabled;
  27. /* Virtual offset */
  28. cycle_t cntvoff;
  29. #endif
  30. };
  31. struct arch_timer_cpu {
  32. #ifdef CONFIG_KVM_ARM_TIMER
  33. /* Registers: control register, timer value */
  34. u32 cntv_ctl; /* Saved/restored */
  35. cycle_t cntv_cval; /* Saved/restored */
  36. /*
  37. * Anything that is not used directly from assembly code goes
  38. * here.
  39. */
  40. /* Background timer used when the guest is not running */
  41. struct hrtimer timer;
  42. /* Work queued with the above timer expires */
  43. struct work_struct expired;
  44. /* Background timer active */
  45. bool armed;
  46. /* Timer IRQ */
  47. const struct kvm_irq_level *irq;
  48. #endif
  49. };
  50. #ifdef CONFIG_KVM_ARM_TIMER
  51. int kvm_timer_hyp_init(void);
  52. int kvm_timer_init(struct kvm *kvm);
  53. void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
  54. void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
  55. void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
  56. void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
  57. #else
  58. static inline int kvm_timer_hyp_init(void)
  59. {
  60. return 0;
  61. };
  62. static inline int kvm_timer_init(struct kvm *kvm)
  63. {
  64. return 0;
  65. }
  66. static inline void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) {}
  67. static inline void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu) {}
  68. static inline void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu) {}
  69. static inline void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu) {}
  70. #endif
  71. #endif