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3e7093d045
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Also, when doing this, change kvm_arch_create_vcpu_debugfs() to return void instead of an integer, as we should not care at all about if this function actually does anything or not. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <x86@kernel.org> Cc: <kvm@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
65 lines
1.8 KiB
C
65 lines
1.8 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_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)
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{
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debugfs_create_file("tsc-offset", 0444, vcpu->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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vcpu->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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vcpu->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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vcpu->debugfs_dentry, vcpu,
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&vcpu_tsc_scaling_frac_fops);
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}
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}
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