• Paolo Bonzini's avatar
    KVM: SVM: always update CR3 in VMCB · 978ce583
    Paolo Bonzini authored
    svm_load_mmu_pgd is delaying the write of GUEST_CR3 to prepare_vmcs02 as
    an optimization, but this is only correct before the nested vmentry.
    If userspace is modifying CR3 with KVM_SET_SREGS after the VM has
    already been put in guest mode, the value of CR3 will not be updated.
    Remove the optimization, which almost never triggers anyway.
    This was was added in commit 689f3bf2 ("KVM: x86: unify callbacks
    to load paging root", 2020-03-16) just to keep the two vendor-specific
    modules closer, but we'll fix VMX too.
    
    Fixes: 689f3bf2 ("KVM: x86: unify callbacks to load paging root")
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    978ce583
nested.c 25.3 KB