This is a succesor of "[PATCH] KVM: x86: drop erroneous mmu_check_root() from fast_pgd_switch()". Undesired triple fault gets injected to L1 guest on SVM when L2 is launched with certain CR3 values. #TF is raised by mmu_check_root() check in fast_pgd_switch() and the root cause is that when kvm_set_cr3() is called from nested_prepare_vmcb_save() with NPT enabled CR3 points to a nGPA so we can't check it with kvm_is_visible_gfn(). Fix the issue by moving kvm_mmu_new_pgd() to the right place when switching to nested guest and drop the unneeded mmu_check_root() check from fast_pgd_switch(). Vitaly Kuznetsov (3): KVM: nSVM: split kvm_init_shadow_npt_mmu() from kvm_init_shadow_mmu() KVM: nSVM: properly call kvm_mmu_new_pgd() upon switching to guest KVM: x86: drop superfluous mmu_check_root() from fast_pgd_switch() arch/x86/include/asm/kvm_host.h | 7 ++++++- arch/x86/kvm/mmu.h | 3 ++- arch/x86/kvm/mmu/mmu.c | 36 ++++++++++++++++++++++++--------- arch/x86/kvm/svm/nested.c | 5 +++-- arch/x86/kvm/x86.c | 8 +++++--- 5 files changed, 43 insertions(+), 16 deletions(-) -- 2.25.4
