/arch/powerpc/include/asm/kvm_para.h

http://github.com/mirrors/linux · C Header · 63 lines · 39 code · 17 blank · 7 comment · 4 complexity · 051985a7efbc9ad7ad26f2e765081589 MD5 · raw file 

    

  1. /* SPDX-License-Identifier: GPL-2.0-only */
    2. 

  2. /*
    3. 

  3.  *
    4. 

  4.  * Copyright IBM Corp. 2008
    5. 

  5.  *
    6. 

  6.  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
    7. 

  7.  */
    8. 

  8. #ifndef __POWERPC_KVM_PARA_H__
    9. 

  9. #define __POWERPC_KVM_PARA_H__
    10. 

  10. 

  11. #include <uapi/asm/kvm_para.h>
    12. 

  12. 

  13. #ifdef CONFIG_KVM_GUEST
    14. 

  14. 

  15. #include <linux/of.h>
    16. 

  16. 

  17. static inline int kvm_para_available(void)
    18. 

  18. {
    19. 

  19. 	struct device_node *hyper_node;
    20. 

  20. 

  21. 	hyper_node = of_find_node_by_path("/hypervisor");
    22. 

  22. 	if (!hyper_node)
    23. 

  23. 		return 0;
    24. 

  24. 

  25. 	if (!of_device_is_compatible(hyper_node, "linux,kvm"))
    26. 

  26. 		return 0;
    27. 

  27. 

  28. 	return 1;
    29. 

  29. }
    30. 

  30. 

  31. #else
    32. 

  32. 

  33. static inline int kvm_para_available(void)
    34. 

  34. {
    35. 

  35. 	return 0;
    36. 

  36. }
    37. 

  37. 

  38. #endif
    39. 

  39. 

  40. static inline unsigned int kvm_arch_para_features(void)
    41. 

  41. {
    42. 

  42. 	unsigned long r;
    43. 

  43. 

  44. 	if (!kvm_para_available())
    45. 

  45. 		return 0;
    46. 

  46. 

  47. 	if(epapr_hypercall0_1(KVM_HCALL_TOKEN(KVM_HC_FEATURES), &r))
    48. 

  48. 		return 0;
    49. 

  49. 

  50. 	return r;
    51. 

  51. }
    52. 

  52. 

  53. static inline unsigned int kvm_arch_para_hints(void)
    54. 

  54. {
    55. 

  55. 	return 0;
    56. 

  56. }
    57. 

  57. 

  58. static inline bool kvm_check_and_clear_guest_paused(void)
    59. 

  59. {
    60. 

  60. 	return false;
    61. 

  61. }
    62. 

  62. 

  63. #endif /* __POWERPC_KVM_PARA_H__ */
    64.