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linux-libre
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kvm
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arm_pmu.h

arm_pmu.h 3.9 KB
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  1. /*
    2. 

  2.  * Copyright (C) 2015 Linaro Ltd.
    3. 

  3.  * Author: Shannon Zhao <shannon.zhao@linaro.org>
    4. 

  4.  *
    5. 

  5.  * This program is free software; you can redistribute it and/or modify
    6. 

  6.  * it under the terms of the GNU General Public License version 2 as
    7. 

  7.  * published by the Free Software Foundation.
    8. 

  8.  *
    9. 

  9.  * This program is distributed in the hope that it will be useful,
    10. 

  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11. 

  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12. 

  12.  * GNU General Public License for more details.
    13. 

  13.  *
    14. 

  14.  * You should have received a copy of the GNU General Public License
    15. 

  15.  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16. 

  16.  */
    17. 

  17. 

  18. #ifndef __ASM_ARM_KVM_PMU_H
    19. 

  19. #define __ASM_ARM_KVM_PMU_H
    20. 

  20. 

  21. #include <linux/perf_event.h>
    22. 

  22. #include <asm/perf_event.h>
    23. 

  23. 

  24. #define ARMV8_PMU_CYCLE_IDX		(ARMV8_PMU_MAX_COUNTERS - 1)
    25. 

  25. 

  26. #ifdef CONFIG_KVM_ARM_PMU
    27. 

  27. 

  28. struct kvm_pmc {
    29. 

  29. 	u8 idx;	/* index into the pmu->pmc array */
    30. 

  30. 	struct perf_event *perf_event;
    31. 

  31. 	u64 bitmask;
    32. 

  32. };
    33. 

  33. 

  34. struct kvm_pmu {
    35. 

  35. 	int irq_num;
    36. 

  36. 	struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
    37. 

  37. 	bool ready;
    38. 

  38. 	bool irq_level;
    39. 

  39. };
    40. 

  40. 

  41. #define kvm_arm_pmu_v3_ready(v)		((v)->arch.pmu.ready)
    42. 

  42. #define kvm_arm_pmu_irq_initialized(v)	((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
    43. 

  43. u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
    44. 

  44. void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
    45. 

  45. u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
    46. 

  46. void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
    47. 

  47. void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
    48. 

  48. void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
    49. 

  49. void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
    50. 

  50. void kvm_pmu_overflow_set(struct kvm_vcpu *vcpu, u64 val);
    51. 

  51. void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
    52. 

  52. void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
    53. 

  53. void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
    54. 

  54. void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
    55. 

  55. void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
    56. 

  56. 				    u64 select_idx);
    57. 

  57. bool kvm_arm_support_pmu_v3(void);
    58. 

  58. int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
    59. 

  59. 			    struct kvm_device_attr *attr);
    60. 

  60. int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
    61. 

  61. 			    struct kvm_device_attr *attr);
    62. 

  62. int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
    63. 

  63. 			    struct kvm_device_attr *attr);
    64. 

  64. #else
    65. 

  65. struct kvm_pmu {
    66. 

  66. };
    67. 

  67. 

  68. #define kvm_arm_pmu_v3_ready(v)		(false)
    69. 

  69. #define kvm_arm_pmu_irq_initialized(v)	(false)
    70. 

  70. static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
    71. 

  71. 					    u64 select_idx)
    72. 

  72. {
    73. 

  73. 	return 0;
    74. 

  74. }
    75. 

  75. static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
    76. 

  76. 					     u64 select_idx, u64 val) {}
    77. 

  77. static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
    78. 

  78. {
    79. 

  79. 	return 0;
    80. 

  80. }
    81. 

  81. static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
    82. 

  82. static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
    83. 

  83. static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
    84. 

  84. static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
    85. 

  85. static inline void kvm_pmu_overflow_set(struct kvm_vcpu *vcpu, u64 val) {}
    86. 

  86. static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
    87. 

  87. static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
    88. 

  88. static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
    89. 

  89. static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
    90. 

  90. static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
    91. 

  91. 						  u64 data, u64 select_idx) {}
    92. 

  92. static inline bool kvm_arm_support_pmu_v3(void) { return false; }
    93. 

  93. static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
    94. 

  94. 					  struct kvm_device_attr *attr)
    95. 

  95. {
    96. 

  96. 	return -ENXIO;
    97. 

  97. }
    98. 

  98. static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
    99. 

  99. 					  struct kvm_device_attr *attr)
    100. 

  100. {
    101. 

  101. 	return -ENXIO;
    102. 

  102. }
    103. 

  103. static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
    104. 

  104. 					  struct kvm_device_attr *attr)
    105. 

  105. {
    106. 

  106. 	return -ENXIO;
    107. 

  107. }
    108. 

  108. #endif
    109. 

  109. 

  110. #endif
    111. 

  111.