FAILED: patch "[PATCH] KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly" failed to apply to 5.10-stable tree

index da7c361f47e0..6ec0b7ce7453 100644
@@ -196,22 +196,15 @@ void __init check_bugs(void)
 }
 
 /*
- * NOTE: This function is *only* called for SVM.  VMX spec_ctrl handling is
- * done in vmenter.S.
+ * NOTE: This function is *only* called for SVM, since Intel uses
+ * MSR_IA32_SPEC_CTRL for SSBD.
  */
 void
 x86_virt_spec_ctrl(u64 guest_spec_ctrl, u64 guest_virt_spec_ctrl, bool setguest)
 {
-	u64 msrval, guestval = guest_spec_ctrl, hostval = spec_ctrl_current();
+	u64 guestval, hostval;
 	struct thread_info *ti = current_thread_info();
 
-	if (static_cpu_has(X86_FEATURE_MSR_SPEC_CTRL)) {
-		if (hostval != guestval) {
-			msrval = setguest ? guestval : hostval;
-			wrmsrl(MSR_IA32_SPEC_CTRL, msrval);
-		}
-	}
-
 	/*
 	 * If SSBD is not handled in MSR_SPEC_CTRL on AMD, update
 	 * MSR_AMD64_L2_CFG or MSR_VIRT_SPEC_CTRL if supported.

index 1b805cd24d66..24a710d37323 100644
@@ -16,6 +16,7 @@ static void __used common(void)
 		BLANK();
 		OFFSET(SVM_vcpu_arch_regs, vcpu_svm, vcpu.arch.regs);
 		OFFSET(SVM_current_vmcb, vcpu_svm, current_vmcb);
+		OFFSET(SVM_spec_ctrl, vcpu_svm, spec_ctrl);
 		OFFSET(SVM_vmcb01, vcpu_svm, vmcb01);
 		OFFSET(KVM_VMCB_pa, kvm_vmcb_info, pa);
 		OFFSET(SD_save_area_pa, svm_cpu_data, save_area_pa);

index 469c1b5617af..cf1aed25f4ab 100644
@@ -720,6 +720,15 @@ static bool msr_write_intercepted(struct kvm_vcpu *vcpu, u32 msr)
 	u32 offset;
 	u32 *msrpm;
 
+	/*
+	 * For non-nested case:
+	 * If the L01 MSR bitmap does not intercept the MSR, then we need to
+	 * save it.
+	 *
+	 * For nested case:
+	 * If the L02 MSR bitmap does not intercept the MSR, then we need to
+	 * save it.
+	 */
 	msrpm = is_guest_mode(vcpu) ? to_svm(vcpu)->nested.msrpm:
 				      to_svm(vcpu)->msrpm;
 

@@ -3901,16 +3910,16 @@ static fastpath_t svm_exit_handlers_fastpath(struct kvm_vcpu *vcpu)
 	return EXIT_FASTPATH_NONE;
 }
 
-static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu)
+static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu, bool spec_ctrl_intercepted)
 {
 	struct vcpu_svm *svm = to_svm(vcpu);
 
 	guest_state_enter_irqoff();
 
 	if (sev_es_guest(vcpu->kvm))
-		__svm_sev_es_vcpu_run(svm);
+		__svm_sev_es_vcpu_run(svm, spec_ctrl_intercepted);
 	else
-		__svm_vcpu_run(svm);
+		__svm_vcpu_run(svm, spec_ctrl_intercepted);
 
 	guest_state_exit_irqoff();
 }

@@ -3918,6 +3927,7 @@ static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu)
 static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_svm *svm = to_svm(vcpu);
+	bool spec_ctrl_intercepted = msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL);
 
 	trace_kvm_entry(vcpu);
 

@@ -3976,26 +3986,7 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
 	if (!static_cpu_has(X86_FEATURE_V_SPEC_CTRL))
 		x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
 
-	svm_vcpu_enter_exit(vcpu);
-
-	/*
-	 * We do not use IBRS in the kernel. If this vCPU has used the
-	 * SPEC_CTRL MSR it may have left it on; save the value and
-	 * turn it off. This is much more efficient than blindly adding
-	 * it to the atomic save/restore list. Especially as the former
-	 * (Saving guest MSRs on vmexit) doesn't even exist in KVM.
-	 *
-	 * For non-nested case:
-	 * If the L01 MSR bitmap does not intercept the MSR, then we need to
-	 * save it.
-	 *
-	 * For nested case:
-	 * If the L02 MSR bitmap does not intercept the MSR, then we need to
-	 * save it.
-	 */
-	if (!static_cpu_has(X86_FEATURE_V_SPEC_CTRL) &&
-	    unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
-		svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);
+	svm_vcpu_enter_exit(vcpu, spec_ctrl_intercepted);
 
 	if (!sev_es_guest(vcpu->kvm))
 		reload_tss(vcpu);

index 83955a4e520e..199a2ecef1ce 100644
@@ -682,7 +682,7 @@ void sev_es_unmap_ghcb(struct vcpu_svm *svm);
 
 /* vmenter.S */
 
-void __svm_sev_es_vcpu_run(struct vcpu_svm *svm);
-void __svm_vcpu_run(struct vcpu_svm *svm);
+void __svm_sev_es_vcpu_run(struct vcpu_svm *svm, bool spec_ctrl_intercepted);
+void __svm_vcpu_run(struct vcpu_svm *svm, bool spec_ctrl_intercepted);
 
 #endif