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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-02-07 13:47:40 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 11:53:19 +0300 |
| commit | 6c7dac72d5c7dc0e09512dce865398167be9a8f7 (patch) | |
| tree | 2c10ebc4871ce0a688f139dbb4c6e81a45cc4286 /arch/x86 | |
| parent | e3da3acdb32c1804a5c853feebcc037b7434076f (diff) | |
| download | lwn-6c7dac72d5c7dc0e09512dce865398167be9a8f7.tar.gz lwn-6c7dac72d5c7dc0e09512dce865398167be9a8f7.zip | |
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: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/svm.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index c12a75953b5b..fb5d6c2e6a08 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -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"); |