Merge tag 'kvm-x86-misc-6.15' of https://github.com/kvm-x86/linux into HEAD

KVM x86 misc changes for 6.15:

 - Fix a bug in PIC emulation that caused KVM to emit a spurious KVM_REQ_EVENT.

 - Add a helper to consolidate handling of mp_state transitions, and use it to
   clear pv_unhalted whenever a vCPU is made RUNNABLE.

 - Defer runtime CPUID updates until KVM emulates a CPUID instruction, to
   coalesce updates when multiple pieces of vCPU state are changing, e.g. as
   part of a nested transition.

 - Fix a variety of nested emulation bugs, and add VMX support for synthesizing
   nested VM-Exit on interception (instead of injecting #UD into L2).

 - Drop "support" for PV Async #PF with proctected guests without SEND_ALWAYS,
   as KVM can't get the current CPL.

 - Misc cleanups

1 files changed, 10 insertions, 8 deletions

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index ed8a3cb53961..d06e50d9c0e7 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -2970,7 +2970,7 @@ static int nested_check_vm_entry_controls(struct kvm_vcpu *vcpu,
 		case INTR_TYPE_SOFT_EXCEPTION:
 		case INTR_TYPE_SOFT_INTR:
 		case INTR_TYPE_PRIV_SW_EXCEPTION:
-			if (CC(vmcs12->vm_entry_instruction_len > 15) ||
+			if (CC(vmcs12->vm_entry_instruction_len > X86_MAX_INSTRUCTION_LENGTH) ||
 			    CC(vmcs12->vm_entry_instruction_len == 0 &&
 			    CC(!nested_cpu_has_zero_length_injection(vcpu))))
 				return -EINVAL;
@@ -3771,7 +3771,7 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
 		break;
 	case GUEST_ACTIVITY_WAIT_SIPI:
 		vmx->nested.nested_run_pending = 0;
-		vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED;
+		kvm_set_mp_state(vcpu, KVM_MP_STATE_INIT_RECEIVED);
 		break;
 	default:
 		break;
@@ -4618,7 +4618,7 @@ static void sync_vmcs02_to_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
  */
 static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
 			   u32 vm_exit_reason, u32 exit_intr_info,
-			   unsigned long exit_qualification)
+			   unsigned long exit_qualification, u32 exit_insn_len)
 {
 	/* update exit information fields: */
 	vmcs12->vm_exit_reason = vm_exit_reason;
@@ -4646,7 +4646,7 @@ static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
 					  vm_exit_reason, exit_intr_info);
 
 		vmcs12->vm_exit_intr_info = exit_intr_info;
-		vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
+		vmcs12->vm_exit_instruction_len = exit_insn_len;
 		vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
 
 		/*
@@ -4930,8 +4930,9 @@ vmabort:
  * and modify vmcs12 to make it see what it would expect to see there if
  * L2 was its real guest. Must only be called when in L2 (is_guest_mode())
  */
-void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
-		       u32 exit_intr_info, unsigned long exit_qualification)
+void __nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
+			 u32 exit_intr_info, unsigned long exit_qualification,
+			 u32 exit_insn_len)
 {
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
 	struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
@@ -4981,7 +4982,8 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
 
 		if (vm_exit_reason != -1)
 			prepare_vmcs12(vcpu, vmcs12, vm_exit_reason,
-				       exit_intr_info, exit_qualification);
+				       exit_intr_info, exit_qualification,
+				       exit_insn_len);
 
 		/*
 		 * Must happen outside of sync_vmcs02_to_vmcs12() as it will
@@ -5071,7 +5073,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
 		vmx->nested.need_vmcs12_to_shadow_sync = true;
 
 	/* in case we halted in L2 */
-	vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
+	kvm_set_mp_state(vcpu, KVM_MP_STATE_RUNNABLE);
 
 	if (likely(!vmx->fail)) {
 		if (vm_exit_reason != -1)