[04/14] KVM: x86: nSVM: don't copy pause related settings

Commit Message

Maxim Levitsky Sept. 14, 2021, 3:48 p.m. UTC

According to the SDM, the CPU never modifies these settings.
It loads them on VM entry and updates an internal copy instead.

Also don't load them from the vmcb12 as we don't expose these
features to the nested guest yet.

Signed-off-by: Maxim Levitsky <[e-mail]>
---
 arch/x86/kvm/svm/nested.c | 8 --------
 1 file changed, 8 deletions(-)

Patch

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 2545d0c61985..476e01f98035 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -551,9 +551,6 @@  static void nested_vmcb02_prepare_control(struct vcpu_svm *svm)
 	svm->vmcb->control.event_inj           = svm->nested.ctl.event_inj;
 	svm->vmcb->control.event_inj_err       = svm->nested.ctl.event_inj_err;
 
-	svm->vmcb->control.pause_filter_count  = svm->nested.ctl.pause_filter_count;
-	svm->vmcb->control.pause_filter_thresh = svm->nested.ctl.pause_filter_thresh;
-
 	nested_svm_transition_tlb_flush(vcpu);
 
 	/* Enter Guest-Mode */
@@ -808,11 +805,6 @@  int nested_svm_vmexit(struct vcpu_svm *svm)
 	vmcb12->control.event_inj         = svm->nested.ctl.event_inj;
 	vmcb12->control.event_inj_err     = svm->nested.ctl.event_inj_err;
 
-	vmcb12->control.pause_filter_count =
-		svm->vmcb->control.pause_filter_count;
-	vmcb12->control.pause_filter_thresh =
-		svm->vmcb->control.pause_filter_thresh;
-
 	nested_svm_copy_common_state(svm->nested.vmcb02.ptr, svm->vmcb01.ptr);
 
 	svm_switch_vmcb(svm, &svm->vmcb01);