2 * Kernel-based Virtual Machine driver for Linux
4 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
6 * This work is licensed under the terms of the GNU GPL, version 2. See
7 * the COPYING file in the top-level directory.
10 #include <linux/kvm_host.h>
11 #include <linux/debugfs.h>
14 bool kvm_arch_has_vcpu_debugfs(void)
19 static int vcpu_get_timer_advance_ns(void *data, u64 *val)
21 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
22 *val = vcpu->arch.apic->lapic_timer.timer_advance_ns;
26 DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n");
28 static int vcpu_get_tsc_offset(void *data, u64 *val)
30 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
31 *val = vcpu->arch.tsc_offset;
35 DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
37 static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
39 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
40 *val = vcpu->arch.tsc_scaling_ratio;
44 DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
46 static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
48 *val = kvm_tsc_scaling_ratio_frac_bits;
52 DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
54 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
58 ret = debugfs_create_file("tsc-offset", 0444,
60 vcpu, &vcpu_tsc_offset_fops);
64 if (lapic_in_kernel(vcpu)) {
65 ret = debugfs_create_file("lapic_timer_advance_ns", 0444,
67 vcpu, &vcpu_timer_advance_ns_fops);
72 if (kvm_has_tsc_control) {
73 ret = debugfs_create_file("tsc-scaling-ratio", 0444,
75 vcpu, &vcpu_tsc_scaling_fops);
78 ret = debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
80 vcpu, &vcpu_tsc_scaling_frac_fops);