KVM: MMU: Extend kvm_mmu_page->slot_bitmap size

Otherwise set_bit() for private memory slot(above KVM_MEMORY_SLOTS) would
corrupted memory in 32bit host.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 93040b5eed96..59c3ae10de6c 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -192,9 +192,11 @@ struct kvm_mmu_page {
         u64 *spt;
         /* hold the gfn of each spte inside spt */
         gfn_t *gfns;
-        unsigned long slot_bitmap; /* One bit set per slot which has memory
-                                    * in this shadow page.
-                                    */
+        /*
+         * One bit set per slot which has memory
+         * in this shadow page.
+         */
+        DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
         int multimapped;         /* More than one parent_pte? */
         int root_count;          /* Currently serving as active root */
         bool unsync;