Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6.23

[linux-2.6-omap-h63xx.git] / drivers / kvm / kvm_main.c

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index bcbe6835beb4316be933f037f728f92d2df60e3d..96856097d15bb9f2cb2b897c87d6a25a6d9248ea 100644 (file)
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -297,9 +297,6 @@ static struct kvm *kvm_create_vm(void)
        kvm_io_bus_init(&kvm->pio_bus);
        spin_lock_init(&kvm->lock);
        INIT_LIST_HEAD(&kvm->active_mmu_pages);
-       spin_lock(&kvm_lock);
-       list_add(&kvm->vm_list, &vm_list);
-       spin_unlock(&kvm_lock);
        kvm_io_bus_init(&kvm->mmio_bus);
        for (i = 0; i < KVM_MAX_VCPUS; ++i) {
                struct kvm_vcpu *vcpu = &kvm->vcpus[i];
@@ -309,6 +306,9 @@ static struct kvm *kvm_create_vm(void)
                vcpu->kvm = kvm;
                vcpu->mmu.root_hpa = INVALID_PAGE;
        }
+       spin_lock(&kvm_lock);
+       list_add(&kvm->vm_list, &vm_list);
+       spin_unlock(&kvm_lock);
        return kvm;
 }
 
@@ -1070,18 +1070,16 @@ static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
                return 0;
        mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
        virt = kmap_atomic(page, KM_USER0);
-       if (memcmp(virt + offset_in_page(gpa), val, bytes)) {
-               kvm_mmu_pte_write(vcpu, gpa, virt + offset, val, bytes);
-               memcpy(virt + offset_in_page(gpa), val, bytes);
-       }
+       kvm_mmu_pte_write(vcpu, gpa, virt + offset, val, bytes);
+       memcpy(virt + offset_in_page(gpa), val, bytes);
        kunmap_atomic(virt, KM_USER0);
        return 1;
 }
 
-static int emulator_write_emulated(unsigned long addr,
-                                  const void *val,
-                                  unsigned int bytes,
-                                  struct x86_emulate_ctxt *ctxt)
+static int emulator_write_emulated_onepage(unsigned long addr,
+                                          const void *val,
+                                          unsigned int bytes,
+                                          struct x86_emulate_ctxt *ctxt)
 {
        struct kvm_vcpu      *vcpu = ctxt->vcpu;
        struct kvm_io_device *mmio_dev;
@@ -1113,6 +1111,26 @@ static int emulator_write_emulated(unsigned long addr,
        return X86EMUL_CONTINUE;
 }
 
+static int emulator_write_emulated(unsigned long addr,
+                                  const void *val,
+                                  unsigned int bytes,
+                                  struct x86_emulate_ctxt *ctxt)
+{
+       /* Crossing a page boundary? */
+       if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
+               int rc, now;
+
+               now = -addr & ~PAGE_MASK;
+               rc = emulator_write_emulated_onepage(addr, val, now, ctxt);
+               if (rc != X86EMUL_CONTINUE)
+                       return rc;
+               addr += now;
+               val += now;
+               bytes -= now;
+       }
+       return emulator_write_emulated_onepage(addr, val, bytes, ctxt);
+}
+
 static int emulator_cmpxchg_emulated(unsigned long addr,
                                     const void *old,
                                     const void *new,
@@ -2414,9 +2432,9 @@ static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
                        break;
                }
        }
-       if (entry && (entry->edx & EFER_NX) && !(efer & EFER_NX)) {
+       if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
                entry->edx &= ~(1 << 20);
-               printk(KERN_INFO ": guest NX capability removed\n");
+               printk(KERN_INFO "kvm: guest NX capability removed\n");
        }
 }