aboutsummaryrefslogtreecommitdiffstats
path: root/virt/kvm
diff options
context:
space:
mode:
Diffstat (limited to 'virt/kvm')
-rw-r--r--virt/kvm/kvm_main.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2b0974a1483..0a360c26cc3 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -45,6 +45,7 @@
#include <linux/spinlock.h>
#include <linux/compat.h>
#include <linux/srcu.h>
+#include <linux/hugetlb.h>
#include <asm/processor.h>
#include <asm/io.h>
@@ -867,6 +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;