/* * Kernel-based Virtual Machine driver for Linux * * Copyright 2016 Red Hat, Inc. and/or its affiliates. * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * */ #include <linux/kvm_host.h> #include <linux/debugfs.h> #include "lapic.h" bool kvm_arch_has_vcpu_debugfs(void) { return true; } static int vcpu_get_timer_advance_ns(void *data, u64 *val) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; *val = vcpu->arch.apic->lapic_timer.timer_advance_ns; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n"); static int vcpu_get_tsc_offset(void *data, u64 *val) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; *val = vcpu->arch.tsc_offset; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n"); static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; *val = vcpu->arch.tsc_scaling_ratio; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n"); static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val) { *val = kvm_tsc_scaling_ratio_frac_bits; return 0; } DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n"); int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) { struct dentry *ret; ret = debugfs_create_file("tsc-offset", 0444, vcpu->debugfs_dentry, vcpu, &vcpu_tsc_offset_fops); if (!ret) return -ENOMEM; if (lapic_in_kernel(vcpu)) { ret = debugfs_create_file("lapic_timer_advance_ns", 0444, vcpu->debugfs_dentry, vcpu, &vcpu_timer_advance_ns_fops); if (!ret) return -ENOMEM; } if (kvm_has_tsc_control) { ret = debugfs_create_file("tsc-scaling-ratio", 0444, vcpu->debugfs_dentry, vcpu, &vcpu_tsc_scaling_fops); if (!ret) return -ENOMEM; ret = debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444, vcpu->debugfs_dentry, vcpu, &vcpu_tsc_scaling_frac_fops); if (!ret) return -ENOMEM; } return 0; }