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Commit 6c7dac72 authored by Joerg Roedel's avatar Joerg Roedel Committed by Avi Kivity
Browse files

KVM: SVM: add module parameter to disable Nested Paging 



To disable the use of the Nested Paging feature even if it is available in
hardware this patch adds a module parameter. Nested Paging can be disabled by
passing npt=0 to the kvm_amd module.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent e3da3acd

arch/x86/kvm/svm.c

+8 −0
Original line number Diff line number Diff line
@@ -48,6 +48,9 @@ MODULE_LICENSE("GPL"); 
#define SVM_DEATURE_SVML (1 << 2)



static bool npt_enabled = false;

static int npt = 1;



module_param(npt, int, S_IRUGO);



static void kvm_reput_irq(struct vcpu_svm *svm);
@@ -418,6 +421,11 @@ static __init int svm_hardware_setup(void) 
	if (!svm_has(SVM_FEATURE_NPT))

		npt_enabled = false;



	if (npt_enabled && !npt) {

		printk(KERN_INFO "kvm: Nested Paging disabled\n");

		npt_enabled = false;

	}



	if (npt_enabled)

		printk(KERN_INFO "kvm: Nested Paging enabled\n");