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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2018-09-26 09:23:46 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-10-17 00:29:53 +0200 |
| commit | 7671ce21b13b9596163a29f4712cb2451a9b97dc (patch) | |
| tree | d6e75dd18e51ff0d5b1511c672a3d80aad59a048 | |
| parent | d63907dc7dd11d98c8ffbdaf8311987e5a508744 (diff) | |
| download | linux-stable-7671ce21b13b9596163a29f4712cb2451a9b97dc.tar.gz linux-stable-7671ce21b13b9596163a29f4712cb2451a9b97dc.tar.bz2 linux-stable-7671ce21b13b9596163a29f4712cb2451a9b97dc.zip | |
KVM: nVMX: move check_vmentry_postreqs() call to nested_vmx_enter_non_root_mode()
In preparation of supporting checkpoint/restore for nested state,
commit ca0bde28f2ed ("kvm: nVMX: Split VMCS checks from nested_vmx_run()")
modified check_vmentry_postreqs() to only perform the guest EFER
consistency checks when nested_run_pending is true. But, in the
normal nested VMEntry flow, nested_run_pending is only set after
check_vmentry_postreqs(), i.e. the consistency check is being skipped.
Alternatively, nested_run_pending could be set prior to calling
check_vmentry_postreqs() in nested_vmx_run(), but placing the
consistency checks in nested_vmx_enter_non_root_mode() allows us
to split prepare_vmcs02() and interleave the preparation with
the consistency checks without having to change the call sites
of nested_vmx_enter_non_root_mode(). In other words, the rest
of the consistency check code in nested_vmx_run() will be joining
the postreqs checks in future patches.
Fixes: ca0bde28f2ed ("kvm: nVMX: Split VMCS checks from nested_vmx_run()")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Jim Mattson <jmattson@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index b0f36d82ae7b..9326f6ab8a36 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -12658,6 +12658,9 @@ static int nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, u32 *exit_qual) if (likely(!evaluate_pending_interrupts) && kvm_vcpu_apicv_active(vcpu)) evaluate_pending_interrupts |= vmx_has_apicv_interrupt(vcpu); + if (from_vmentry && check_vmentry_postreqs(vcpu, vmcs12, exit_qual)) + return EXIT_REASON_INVALID_STATE; + enter_guest_mode(vcpu); if (!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) @@ -12800,13 +12803,6 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) */ skip_emulated_instruction(vcpu); - ret = check_vmentry_postreqs(vcpu, vmcs12, &exit_qual); - if (ret) { - nested_vmx_entry_failure(vcpu, vmcs12, - EXIT_REASON_INVALID_STATE, exit_qual); - return 1; - } - /* * We're finally done with prerequisite checking, and can start with * the nested entry. |