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16ba3ab4e1
Expose per-vCPU timer_advance_ns to userspace, so it is able to query the auto-adjusted value. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Sean Christopherson <sean.j.christopherson@intel.com> Cc: Liran Alon <liran.alon@oracle.com> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/*
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* Kernel-based Virtual Machine driver for Linux
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*
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* Copyright 2016 Red Hat, Inc. and/or its affiliates.
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include <linux/kvm_host.h>
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#include <linux/debugfs.h>
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#include "lapic.h"
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bool kvm_arch_has_vcpu_debugfs(void)
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{
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return true;
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}
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static int vcpu_get_timer_advance_ns(void *data, u64 *val)
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{
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struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
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*val = vcpu->arch.apic->lapic_timer.timer_advance_ns;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n");
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static int vcpu_get_tsc_offset(void *data, u64 *val)
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{
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struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
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*val = vcpu->arch.tsc_offset;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
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static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
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{
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struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
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*val = vcpu->arch.tsc_scaling_ratio;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
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static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
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{
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*val = kvm_tsc_scaling_ratio_frac_bits;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
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int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
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{
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struct dentry *ret;
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ret = debugfs_create_file("tsc-offset", 0444,
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vcpu->debugfs_dentry,
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vcpu, &vcpu_tsc_offset_fops);
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if (!ret)
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return -ENOMEM;
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if (lapic_in_kernel(vcpu)) {
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ret = debugfs_create_file("lapic_timer_advance_ns", 0444,
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vcpu->debugfs_dentry,
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vcpu, &vcpu_timer_advance_ns_fops);
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if (!ret)
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return -ENOMEM;
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}
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if (kvm_has_tsc_control) {
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ret = debugfs_create_file("tsc-scaling-ratio", 0444,
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vcpu->debugfs_dentry,
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vcpu, &vcpu_tsc_scaling_fops);
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if (!ret)
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return -ENOMEM;
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ret = debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
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vcpu->debugfs_dentry,
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vcpu, &vcpu_tsc_scaling_frac_fops);
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if (!ret)
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return -ENOMEM;
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}
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return 0;
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}
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