Merge branch 'kvm-master' into HEAD

This merge brings in a couple important SMM fixes, which makes it
easier to test latest KVM with unrestricted_guest=0 and to test
the in-progress work on SMM support in the firmware.

Conflicts:
	arch/x86/kvm/x86.c

arch/x86/include/asm/kvm_host.h

@@ -1251,10 +1251,8 @@ void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
 
 int kvm_is_in_guest(void);
 
-int __x86_set_memory_region(struct kvm *kvm,
-			    const struct kvm_userspace_memory_region *mem);
-int x86_set_memory_region(struct kvm *kvm,
-			  const struct kvm_userspace_memory_region *mem);
+int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size);
+int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size);
 bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu);
 bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu);
 

arch/x86/kvm/vmx.c

@@ -4227,17 +4227,13 @@ static void seg_setup(int seg)
 static int alloc_apic_access_page(struct kvm *kvm)
 {
 	struct page *page;
-	struct kvm_userspace_memory_region kvm_userspace_mem;
 	int r = 0;
 
 	mutex_lock(&kvm->slots_lock);
 	if (kvm->arch.apic_access_page_done)
 		goto out;
-	kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
-	kvm_userspace_mem.flags = 0;
-	kvm_userspace_mem.guest_phys_addr = APIC_DEFAULT_PHYS_BASE;
-	kvm_userspace_mem.memory_size = PAGE_SIZE;
-	r = __x86_set_memory_region(kvm, &kvm_userspace_mem);
+	r = __x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
+				    APIC_DEFAULT_PHYS_BASE, PAGE_SIZE);
 	if (r)
 		goto out;
 
@@ -4262,17 +4258,12 @@ static int alloc_identity_pagetable(struct kvm *kvm)
 {
 	/* Called with kvm->slots_lock held. */
 
-	struct kvm_userspace_memory_region kvm_userspace_mem;
 	int r = 0;
 
 	BUG_ON(kvm->arch.ept_identity_pagetable_done);
 
-	kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
-	kvm_userspace_mem.flags = 0;
-	kvm_userspace_mem.guest_phys_addr =
-		kvm->arch.ept_identity_map_addr;
-	kvm_userspace_mem.memory_size = PAGE_SIZE;
-	r = __x86_set_memory_region(kvm, &kvm_userspace_mem);
+	r = __x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT,
+				    kvm->arch.ept_identity_map_addr, PAGE_SIZE);
 
 	return r;
 }
@@ -5089,14 +5080,9 @@ static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu)
 static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
 {
 	int ret;
-	struct kvm_userspace_memory_region tss_mem = {
-		.slot = TSS_PRIVATE_MEMSLOT,
-		.guest_phys_addr = addr,
-		.memory_size = PAGE_SIZE * 3,
-		.flags = 0,
-	};
 
-	ret = x86_set_memory_region(kvm, &tss_mem);
+	ret = x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, addr,
+				    PAGE_SIZE * 3);
 	if (ret)
 		return ret;
 	kvm->arch.tss_addr = addr;

arch/x86/kvm/x86.c

@@ -6531,6 +6531,12 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
 	return 1;
 }
 
+static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu)
+{
+	return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
+		!vcpu->arch.apf.halted);
+}
+
 static int vcpu_run(struct kvm_vcpu *vcpu)
 {
 	int r;
@@ -6539,8 +6545,7 @@ static int vcpu_run(struct kvm_vcpu *vcpu)
 	vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
 
 	for (;;) {
-		if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
-		    !vcpu->arch.apf.halted) {
+		if (kvm_vcpu_running(vcpu)) {
 			r = vcpu_enter_guest(vcpu);
 		} else {
 			r = vcpu_block(kvm, vcpu);
@@ -7556,34 +7561,66 @@ void kvm_arch_sync_events(struct kvm *kvm)
 	kvm_free_pit(kvm);
 }
 
-int __x86_set_memory_region(struct kvm *kvm,
-			    const struct kvm_userspace_memory_region *mem)
+int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size)
 {
 	int i, r;
+	u64 hva;
+	struct kvm_memslots *slots = kvm_memslots(kvm);
+	struct kvm_memory_slot *slot, old;
 
 	/* Called with kvm->slots_lock held.  */
-	BUG_ON(mem->slot >= KVM_MEM_SLOTS_NUM);
+	if (WARN_ON(id >= KVM_MEM_SLOTS_NUM))
+		return -EINVAL;
+
+	slot = id_to_memslot(slots, id);
+	if (size) {
+		if (WARN_ON(slot->npages))
+			return -EEXIST;
+
+		/*
+		 * MAP_SHARED to prevent internal slot pages from being moved
+		 * by fork()/COW.
+		 */
+		hva = vm_mmap(NULL, 0, size, PROT_READ | PROT_WRITE,
+			      MAP_SHARED | MAP_ANONYMOUS, 0);
+		if (IS_ERR((void *)hva))
+			return PTR_ERR((void *)hva);
+	} else {
+		if (!slot->npages)
+			return 0;
 
+		hva = 0;
+	}
+
+	old = *slot;
 	for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {
-		struct kvm_userspace_memory_region m = *mem;
+		struct kvm_userspace_memory_region m;
 
-		m.slot |= i << 16;
+		m.slot = id | (i << 16);
+		m.flags = 0;
+		m.guest_phys_addr = gpa;
+		m.userspace_addr = hva;
+		m.memory_size = size;
 		r = __kvm_set_memory_region(kvm, &m);
 		if (r < 0)
 			return r;
 	}
 
+	if (!size) {
+		r = vm_munmap(old.userspace_addr, old.npages * PAGE_SIZE);
+		WARN_ON(r < 0);
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(__x86_set_memory_region);
 
-int x86_set_memory_region(struct kvm *kvm,
-			  const struct kvm_userspace_memory_region *mem)
+int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size)
 {
 	int r;
 
 	mutex_lock(&kvm->slots_lock);
-	r = __x86_set_memory_region(kvm, mem);
+	r = __x86_set_memory_region(kvm, id, gpa, size);
 	mutex_unlock(&kvm->slots_lock);
 
 	return r;
@@ -7598,16 +7635,9 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
 		 * unless the the memory map has changed due to process exit
 		 * or fd copying.
 		 */
-		struct kvm_userspace_memory_region mem;
-		memset(&mem, 0, sizeof(mem));
-		mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
-		x86_set_memory_region(kvm, &mem);
-
-		mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
-		x86_set_memory_region(kvm, &mem);
-
-		mem.slot = TSS_PRIVATE_MEMSLOT;
-		x86_set_memory_region(kvm, &mem);
+		x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, 0, 0);
+		x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, 0, 0);
+		x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0);
 	}
 	kvm_iommu_unmap_guest(kvm);
 	kfree(kvm->arch.vpic);
@@ -7710,27 +7740,6 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
 				const struct kvm_userspace_memory_region *mem,
 				enum kvm_mr_change change)
 {
-	/*
-	 * Only private memory slots need to be mapped here since
-	 * KVM_SET_MEMORY_REGION ioctl is no longer supported.
-	 */
-	if ((memslot->id >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_CREATE)) {
-		unsigned long userspace_addr;
-
-		/*
-		 * MAP_SHARED to prevent internal slot pages from being moved
-		 * by fork()/COW.
-		 */
-		userspace_addr = vm_mmap(NULL, 0, memslot->npages * PAGE_SIZE,
-					 PROT_READ | PROT_WRITE,
-					 MAP_SHARED | MAP_ANONYMOUS, 0);
-
-		if (IS_ERR((void *)userspace_addr))
-			return PTR_ERR((void *)userspace_addr);
-
-		memslot->userspace_addr = userspace_addr;
-	}
-
 	return 0;
 }
 
@@ -7792,17 +7801,6 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
 {
 	int nr_mmu_pages = 0;
 
-	if (change == KVM_MR_DELETE && old->id >= KVM_USER_MEM_SLOTS) {
-		int ret;
-
-		ret = vm_munmap(old->userspace_addr,
-				old->npages * PAGE_SIZE);
-		if (ret < 0)
-			printk(KERN_WARNING
-			       "kvm_vm_ioctl_set_memory_region: "
-			       "failed to munmap memory\n");
-	}
-
 	if (!kvm->arch.n_requested_mmu_pages)
 		nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
 
@@ -7851,19 +7849,36 @@ void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 	kvm_mmu_invalidate_zap_all_pages(kvm);
 }
 
+static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu)
+{
+	if (!list_empty_careful(&vcpu->async_pf.done))
+		return true;
+
+	if (kvm_apic_has_events(vcpu))
+		return true;
+
+	if (vcpu->arch.pv.pv_unhalted)
+		return true;
+
+	if (atomic_read(&vcpu->arch.nmi_queued))
+		return true;
+
+	if (test_bit(KVM_REQ_SMI, &vcpu->requests))
+		return true;
+
+	if (kvm_arch_interrupt_allowed(vcpu) &&
+	    kvm_cpu_has_interrupt(vcpu))
+		return true;
+
+	return false;
+}
+
 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
 {
 	if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events)
 		kvm_x86_ops->check_nested_events(vcpu, false);
 
-	return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
-		!vcpu->arch.apf.halted)
-		|| !list_empty_careful(&vcpu->async_pf.done)
-		|| kvm_apic_has_events(vcpu)
-		|| vcpu->arch.pv.pv_unhalted
-		|| atomic_read(&vcpu->arch.nmi_queued) ||
-		(kvm_arch_interrupt_allowed(vcpu) &&
-		 kvm_cpu_has_interrupt(vcpu));
+	return kvm_vcpu_running(vcpu) || kvm_vcpu_has_events(vcpu);
 }
 
 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)