x86 bugfix patches and one compilation fix for ARM.

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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "x86 bugfix patches and one compilation fix for ARM"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: arm64/sve: Fix vq_present() macro to yield a bool
  KVM: LAPIC: Fix pending interrupt in IRR blocked by software disable LAPIC
  KVM: nVMX: Change KVM_STATE_NESTED_EVMCS to signal vmcs12 is copied from eVMCS
  KVM: nVMX: Allow restore nested-state to enable eVMCS when vCPU in SMM
  KVM: x86: degrade WARN to pr_warn_ratelimited

arch/arm64/kvm/guest.c

@@ -208,7 +208,7 @@ out:
 
 #define vq_word(vq) (((vq) - SVE_VQ_MIN) / 64)
 #define vq_mask(vq) ((u64)1 << ((vq) - SVE_VQ_MIN) % 64)
-#define vq_present(vqs, vq) ((vqs)[vq_word(vq)] & vq_mask(vq))
+#define vq_present(vqs, vq) (!!((vqs)[vq_word(vq)] & vq_mask(vq)))
 
 static int get_sve_vls(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
 {

arch/x86/kvm/lapic.c

@@ -2339,7 +2339,7 @@ int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu)
 	struct kvm_lapic *apic = vcpu->arch.apic;
 	u32 ppr;
 
-	if (!apic_enabled(apic))
+	if (!kvm_apic_hw_enabled(apic))
 		return -1;
 
 	__apic_update_ppr(apic, &ppr);

arch/x86/kvm/vmx/nested.c

@@ -5240,9 +5240,6 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
 	vmx = to_vmx(vcpu);
 	vmcs12 = get_vmcs12(vcpu);
 
-	if (nested_vmx_allowed(vcpu) && vmx->nested.enlightened_vmcs_enabled)
-		kvm_state.flags |= KVM_STATE_NESTED_EVMCS;
-
 	if (nested_vmx_allowed(vcpu) &&
 	    (vmx->nested.vmxon || vmx->nested.smm.vmxon)) {
 		kvm_state.hdr.vmx.vmxon_pa = vmx->nested.vmxon_ptr;
@@ -5251,6 +5248,9 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
 		if (vmx_has_valid_vmcs12(vcpu)) {
 			kvm_state.size += sizeof(user_vmx_nested_state->vmcs12);
 
+			if (vmx->nested.hv_evmcs)
+				kvm_state.flags |= KVM_STATE_NESTED_EVMCS;
+
 			if (is_guest_mode(vcpu) &&
 			    nested_cpu_has_shadow_vmcs(vmcs12) &&
 			    vmcs12->vmcs_link_pointer != -1ull)
@@ -5350,6 +5350,15 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
 		if (kvm_state->hdr.vmx.vmcs12_pa != -1ull)
 			return -EINVAL;
 
+		/*
+		 * KVM_STATE_NESTED_EVMCS used to signal that KVM should
+		 * enable eVMCS capability on vCPU. However, since then
+		 * code was changed such that flag signals vmcs12 should
+		 * be copied into eVMCS in guest memory.
+		 *
+		 * To preserve backwards compatability, allow user
+		 * to set this flag even when there is no VMXON region.
+		 */
 		if (kvm_state->flags & ~KVM_STATE_NESTED_EVMCS)
 			return -EINVAL;
 	} else {
@@ -5358,7 +5367,7 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
 
 		if (!page_address_valid(vcpu, kvm_state->hdr.vmx.vmxon_pa))
 			return -EINVAL;
-    	}
+	}
 
 	if ((kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) &&
 	    (kvm_state->flags & KVM_STATE_NESTED_GUEST_MODE))
@@ -5373,20 +5382,21 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
 	 * nor can VMLAUNCH/VMRESUME be pending.  Outside SMM, SMM flags
 	 * must be zero.
 	 */
-	if (is_smm(vcpu) ? kvm_state->flags : kvm_state->hdr.vmx.smm.flags)
+	if (is_smm(vcpu) ?
+		(kvm_state->flags &
+		 (KVM_STATE_NESTED_GUEST_MODE | KVM_STATE_NESTED_RUN_PENDING))
+		: kvm_state->hdr.vmx.smm.flags)
 		return -EINVAL;
 
 	if ((kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) &&
 	    !(kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON))
 		return -EINVAL;
 
-	vmx_leave_nested(vcpu);
-	if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) {
-		if (!nested_vmx_allowed(vcpu))
+	if ((kvm_state->flags & KVM_STATE_NESTED_EVMCS) &&
+		(!nested_vmx_allowed(vcpu) || !vmx->nested.enlightened_vmcs_enabled))
 			return -EINVAL;
 
-		nested_enable_evmcs(vcpu, NULL);
-	}
+	vmx_leave_nested(vcpu);
 
 	if (kvm_state->hdr.vmx.vmxon_pa == -1ull)
 		return 0;

arch/x86/kvm/x86.c

@@ -1554,7 +1554,7 @@ static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
 			vcpu->arch.tsc_always_catchup = 1;
 			return 0;
 		} else {
-			WARN(1, "user requested TSC rate below hardware speed\n");
+			pr_warn_ratelimited("user requested TSC rate below hardware speed\n");
 			return -1;
 		}
 	}
@@ -1564,8 +1564,8 @@ static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
 				user_tsc_khz, tsc_khz);
 
 	if (ratio == 0 || ratio >= kvm_max_tsc_scaling_ratio) {
-		WARN_ONCE(1, "Invalid TSC scaling ratio - virtual-tsc-khz=%u\n",
-			  user_tsc_khz);
+		pr_warn_ratelimited("Invalid TSC scaling ratio - virtual-tsc-khz=%u\n",
+			            user_tsc_khz);
 		return -1;
 	}
 

tools/testing/selftests/kvm/x86_64/evmcs_test.c

@@ -146,6 +146,7 @@ int main(int argc, char *argv[])
 		kvm_vm_restart(vm, O_RDWR);
 		vm_vcpu_add(vm, VCPU_ID, 0, 0);
 		vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
+		vcpu_ioctl(vm, VCPU_ID, KVM_ENABLE_CAP, &enable_evmcs_cap);
 		vcpu_load_state(vm, VCPU_ID, state);
 		run = vcpu_state(vm, VCPU_ID);
 		free(state);