Vitaly Kuznetsov a506fdd223 KVM: nSVM: implement nested_svm_load_cr3() and use it for host->guest 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(). Using generic kvm_set_cr3() when switching to nested guest is not a great idea as we'll have to distinguish between 'real' CR3s and 'nested' CR3s to e.g. not call kvm_mmu_new_pgd() with nGPA. Following nVMX implement nested-specific nested_svm_load_cr3() doing the job. To support the change, nested_svm_load_cr3() needs to be re-ordered with nested_svm_init_mmu_context(). Note: the current implementation is sub-optimal as we always do TLB flush/MMU sync but this is still an improvement as we at least stop doing kvm_mmu_reset_context(). Fixes: 7c390d350f ("kvm: x86: Add fast CR3 switch code path") Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Message-Id: <20200710141157.1640173-8-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2020-07-10 12:57:37 -04:00
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mmu_audit.c	KVM: x86/mmu: Rename page_header() to to_shadow_page()	2020-07-08 16:21:55 -04:00
mmu_internal.h	KVM: x86/mmu: Rename page_header() to to_shadow_page()	2020-07-08 16:21:55 -04:00
mmu.c	KVM: nSVM: implement nested_svm_load_cr3() and use it for host->guest switch	2020-07-10 12:57:37 -04:00
mmutrace.h	KVM: x86/mmu: Move mmu_audit.c and mmutrace.h into the mmu/ sub-directory	2020-07-08 16:21:53 -04:00
page_track.c	KVM: x86/mmu: Add MMU-internal header	2020-07-08 16:21:54 -04:00
paging_tmpl.h	KVM: x86/mmu: Skip filling the gfn cache for guaranteed direct MMU topups	2020-07-09 13:29:41 -04:00