debugfs.c 1.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Kernel-based Virtual Machine driver for Linux
  4. *
  5. * Copyright 2016 Red Hat, Inc. and/or its affiliates.
  6. */
  7. #include <linux/kvm_host.h>
  8. #include <linux/debugfs.h>
  9. #include "lapic.h"
  10. static int vcpu_get_timer_advance_ns(void *data, u64 *val)
  11. {
  12. struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
  13. *val = vcpu->arch.apic->lapic_timer.timer_advance_ns;
  14. return 0;
  15. }
  16. DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n");
  17. static int vcpu_get_tsc_offset(void *data, u64 *val)
  18. {
  19. struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
  20. *val = vcpu->arch.tsc_offset;
  21. return 0;
  22. }
  23. DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
  24. static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
  25. {
  26. struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
  27. *val = vcpu->arch.tsc_scaling_ratio;
  28. return 0;
  29. }
  30. DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
  31. static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
  32. {
  33. *val = kvm_tsc_scaling_ratio_frac_bits;
  34. return 0;
  35. }
  36. DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
  37. void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
  38. {
  39. debugfs_create_file("tsc-offset", 0444, debugfs_dentry, vcpu,
  40. &vcpu_tsc_offset_fops);
  41. if (lapic_in_kernel(vcpu))
  42. debugfs_create_file("lapic_timer_advance_ns", 0444,
  43. debugfs_dentry, vcpu,
  44. &vcpu_timer_advance_ns_fops);
  45. if (kvm_has_tsc_control) {
  46. debugfs_create_file("tsc-scaling-ratio", 0444,
  47. debugfs_dentry, vcpu,
  48. &vcpu_tsc_scaling_fops);
  49. debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
  50. debugfs_dentry, vcpu,
  51. &vcpu_tsc_scaling_frac_fops);
  52. }
  53. }