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d5a0483f9f
Add the following per-VCPU statistic to KVM debugfs to show if a given VCPU is in guest mode: guest_mode Also add this as a per-VM statistic to KVM debugfs to show the total number of VCPUs that are in guest mode in a given VM. Signed-off-by: Krish Sadhukhan <Krish.Sadhukhan@oracle.com> Message-Id: <20210609180340.104248-3-krish.sadhukhan@oracle.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#include <linux/kvm_host.h>
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#include <linux/debugfs.h>
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#include "lapic.h"
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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_guest_mode(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->stat.guest_mode;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(vcpu_guest_mode_fops, vcpu_get_guest_mode, NULL, "%lld\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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void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
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{
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debugfs_create_file("guest_mode", 0444, debugfs_dentry, vcpu,
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&vcpu_guest_mode_fops);
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debugfs_create_file("tsc-offset", 0444, debugfs_dentry, vcpu,
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&vcpu_tsc_offset_fops);
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if (lapic_in_kernel(vcpu))
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debugfs_create_file("lapic_timer_advance_ns", 0444,
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debugfs_dentry, vcpu,
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&vcpu_timer_advance_ns_fops);
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if (kvm_has_tsc_control) {
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debugfs_create_file("tsc-scaling-ratio", 0444,
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debugfs_dentry, vcpu,
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&vcpu_tsc_scaling_fops);
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debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
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debugfs_dentry, vcpu,
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&vcpu_tsc_scaling_frac_fops);
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}
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}
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