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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-09-09 19:11:51 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-09-11 11:39:25 +0300 |
| commit | e5eab0cede4b1ffaca4ad857d840127622038e55 (patch) | |
| tree | 1471ba4a46298778271f1440b14a5f4e795bc291 | |
| parent | 44874f84918e37b64bec6df1587e5fe2fdf6ab62 (diff) | |
| download | kernel-common-e5eab0cede4b1ffaca4ad857d840127622038e55.tar.gz kernel-common-e5eab0cede4b1ffaca4ad857d840127622038e55.tar.bz2 kernel-common-e5eab0cede4b1ffaca4ad857d840127622038e55.zip | |
KVM: SVM: fix guest global tlb flushes with NPT
Accesses to CR4 are intercepted even with Nested Paging enabled. But the code
does not check if the guest wants to do a global TLB flush. So this flush gets
lost. This patch adds the check and the flush to svm_set_cr4.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | arch/x86/kvm/svm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d1106cddab0d..8233b86c778c 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -879,6 +879,10 @@ set: static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) { unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE; + unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4; + + if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE)) + force_new_asid(vcpu); vcpu->arch.cr4 = cr4; if (!npt_enabled) |