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KVM: align valid EFER bits with the features of the host system

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This patch aligns the bits the guest can set in the EFER register with the
features in the host processor. Currently it lets EFER.NX disabled if the
processor does not support it and enables EFER.LME and EFER.LMA only for KVM on
64 bit hosts.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Joerg Roedel
2008-01-31 14:57:38 +01:00
committed by Avi Kivity
parent f2b4b7ddf6
commit 50a37eb4e0
3 changed files with 16 additions and 1 deletions
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3
arch/x86/kvm/svm.c
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@@ -403,6 +403,9 @@ static __init int svm_hardware_setup(void)
set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
if (boot_cpu_has(X86_FEATURE_NX))
kvm_enable_efer_bits(EFER_NX);
for_each_online_cpu(cpu) {
r = svm_cpu_init(cpu);
if (r)