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

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index cdbdb55..53deb27 100644 (file)
--- a/arch/x86/include/asm/kvm_host.h
+++ b/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);
 

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index c5c2283..8eeba6a 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/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;

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2d2c9bb..ba1a968 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/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)