Commit d780a312 authored Oct 29, 2013 by Tim Gardner Committed by Paolo Bonzini Oct 30, 2013

KVM: Fix modprobe failure for kvm_intel/kvm_amd



The x86 specific kvm init creates a new conflicting
debugfs directory which causes modprobe issues
with kvm_intel and kvm_amd. For example,

sudo modprobe kvm_amd
modprobe: ERROR: could not insert 'kvm_amd': Bad address

The simplest fix is to just rename the directory. The following
KVM config options are set:

CONFIG_KVM_GUEST=y
CONFIG_KVM_DEBUG_FS=y
CONFIG_HAVE_KVM=y
CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_HAVE_KVM_IRQ_ROUTING=y
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_APIC_ARCHITECTURE=y
CONFIG_KVM_MMIO=y
CONFIG_KVM_ASYNC_PF=y
CONFIG_HAVE_KVM_MSI=y
CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT=y
CONFIG_KVM=m
CONFIG_KVM_INTEL=m
CONFIG_KVM_AMD=m
CONFIG_KVM_DEVICE_ASSIGNMENT=y

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
[Change debugfs directory name. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 7314e613

arch/x86/kernel/kvm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -609,7 +609,7 @@ static struct dentry *d_kvm_debug;

		struct dentry *kvm_init_debugfs(void)
		{
		d_kvm_debug = debugfs_create_dir("kvm", NULL);
		d_kvm_debug = debugfs_create_dir("kvm-guest", NULL);
		if (!d_kvm_debug)
		printk(KERN_WARNING "Could not create 'kvm' debugfs directory\n");

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