aboutsummaryrefslogtreecommitdiff
path: root/arch/x86
diff options
context:
space:
mode:
authorMarcelo Tosatti <mtosatti@redhat.com>2009-12-23 14:35:18 -0200
committerMarcelo Tosatti <mtosatti@redhat.com>2010-03-01 12:35:44 -0300
commitf7784b8ec9b6a041fa828cfbe9012fe51933f5ac (patch)
treedc67f35e585bb06492852c01776aea4b737db48b /arch/x86
parentfef9cce0eb28a67e688a411cc30b73625e49002b (diff)
KVM: split kvm_arch_set_memory_region into prepare and commit
Required for SRCU convertion later. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kvm/x86.c51
1 files changed, 29 insertions, 22 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1ce83319143..43da65feed4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5228,13 +5228,13 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
kfree(kvm);
}
-int kvm_arch_set_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+int kvm_arch_prepare_memory_region(struct kvm *kvm,
+ struct kvm_memory_slot *memslot,
struct kvm_memory_slot old,
+ struct kvm_userspace_memory_region *mem,
int user_alloc)
{
- int npages = mem->memory_size >> PAGE_SHIFT;
- struct kvm_memory_slot *memslot = &kvm->memslots->memslots[mem->slot];
+ int npages = memslot->npages;
/*To keep backward compatibility with older userspace,
*x86 needs to hanlde !user_alloc case.
@@ -5254,26 +5254,35 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
if (IS_ERR((void *)userspace_addr))
return PTR_ERR((void *)userspace_addr);
- /* set userspace_addr atomically for kvm_hva_to_rmapp */
- spin_lock(&kvm->mmu_lock);
memslot->userspace_addr = userspace_addr;
- spin_unlock(&kvm->mmu_lock);
- } else {
- if (!old.user_alloc && old.rmap) {
- int ret;
-
- down_write(&current->mm->mmap_sem);
- ret = do_munmap(current->mm, old.userspace_addr,
- old.npages * PAGE_SIZE);
- up_write(&current->mm->mmap_sem);
- if (ret < 0)
- printk(KERN_WARNING
- "kvm_vm_ioctl_set_memory_region: "
- "failed to munmap memory\n");
- }
}
}
+
+ return 0;
+}
+
+void kvm_arch_commit_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ struct kvm_memory_slot old,
+ int user_alloc)
+{
+
+ int npages = mem->memory_size >> PAGE_SHIFT;
+
+ if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
+ int ret;
+
+ down_write(&current->mm->mmap_sem);
+ ret = do_munmap(current->mm, old.userspace_addr,
+ old.npages * PAGE_SIZE);
+ up_write(&current->mm->mmap_sem);
+ if (ret < 0)
+ printk(KERN_WARNING
+ "kvm_vm_ioctl_set_memory_region: "
+ "failed to munmap memory\n");
+ }
+
spin_lock(&kvm->mmu_lock);
if (!kvm->arch.n_requested_mmu_pages) {
unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
@@ -5282,8 +5291,6 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
kvm_mmu_slot_remove_write_access(kvm, mem->slot);
spin_unlock(&kvm->mmu_lock);
-
- return 0;
}
void kvm_arch_flush_shadow(struct kvm *kvm)