diff options
Diffstat (limited to 'arch/x86/kvm/debugfs.c')
| -rw-r--r-- | arch/x86/kvm/debugfs.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/arch/x86/kvm/debugfs.c b/arch/x86/kvm/debugfs.c index c19c7ede9bd6..329361b69d5e 100644 --- a/arch/x86/kvm/debugfs.c +++ b/arch/x86/kvm/debugfs.c @@ -1,20 +1,27 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * 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; @@ -51,6 +58,14 @@ int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) 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, |