Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6

[karo-tx-linux.git] / virt / kvm / kvm_main.c

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 7c5c873812ff8dc0a834a0694dd6dea079d0bae1..5a0cd194dce00ee75b40b73d146ee478db1e4d38 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -22,7 +22,6 @@
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/percpu.h>
-#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/miscdevice.h>
 #include <linux/vmalloc.h>
@@ -45,6 +44,8 @@
 #include <linux/spinlock.h>
 #include <linux/compat.h>
 #include <linux/srcu.h>
+#include <linux/hugetlb.h>
+#include <linux/slab.h>
 
 #include <asm/processor.h>
 #include <asm/io.h>
@@ -137,7 +138,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
 
        zalloc_cpumask_var(&cpus, GFP_ATOMIC);
 
-       spin_lock(&kvm->requests_lock);
+       raw_spin_lock(&kvm->requests_lock);
        me = smp_processor_id();
        kvm_for_each_vcpu(i, vcpu, kvm) {
                if (test_and_set_bit(req, &vcpu->requests))
@@ -152,7 +153,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
                smp_call_function_many(cpus, ack_flush, NULL, 1);
        else
                called = false;
-       spin_unlock(&kvm->requests_lock);
+       raw_spin_unlock(&kvm->requests_lock);
        free_cpumask_var(cpus);
        return called;
 }
@@ -371,9 +372,6 @@ static struct kvm *kvm_create_vm(void)
 {
        int r = 0, i;
        struct kvm *kvm = kvm_arch_create_vm();
-#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
-       struct page *page;
-#endif
 
        if (IS_ERR(kvm))
                goto out;
@@ -402,30 +400,16 @@ static struct kvm *kvm_create_vm(void)
                }
        }
 
-#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
-       page = alloc_page(GFP_KERNEL | __GFP_ZERO);
-       if (!page) {
-               cleanup_srcu_struct(&kvm->srcu);
-               goto out_err;
-       }
-
-       kvm->coalesced_mmio_ring =
-                       (struct kvm_coalesced_mmio_ring *)page_address(page);
-#endif
-
        r = kvm_init_mmu_notifier(kvm);
        if (r) {
                cleanup_srcu_struct(&kvm->srcu);
-#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
-               put_page(page);
-#endif
                goto out_err;
        }
 
        kvm->mm = current->mm;
        atomic_inc(&kvm->mm->mm_count);
        spin_lock_init(&kvm->mmu_lock);
-       spin_lock_init(&kvm->requests_lock);
+       raw_spin_lock_init(&kvm->requests_lock);
        kvm_eventfd_init(kvm);
        mutex_init(&kvm->lock);
        mutex_init(&kvm->irq_lock);
@@ -884,6 +868,30 @@ int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
 }
 EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
 
+unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn)
+{
+       struct vm_area_struct *vma;
+       unsigned long addr, size;
+
+       size = PAGE_SIZE;
+
+       addr = gfn_to_hva(kvm, gfn);
+       if (kvm_is_error_hva(addr))
+               return PAGE_SIZE;
+
+       down_read(&current->mm->mmap_sem);
+       vma = find_vma(current->mm, addr);
+       if (!vma)
+               goto out;
+
+       size = vma_kernel_pagesize(vma);
+
+out:
+       up_read(&current->mm->mmap_sem);
+
+       return size;
+}
+
 int memslot_id(struct kvm *kvm, gfn_t gfn)
 {
        int i;