Make SVM IOIO intercept check all needed bits, by Bernhard Kauer.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3792 c046a42c-6fe2-441c-8c8c-71466251a162

Make SVM IOIO intercept check all needed bits, by Bernhard Kauer.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3792 c046a42c-6fe2-441c-8c8c-71466251a162
balrog
1 parent df01e0fc
Showing 1 changed file with 2 additions and 1 deletions
target-i386/helper.c
@@ -4262,7 +4262,8 @@ int svm_check_intercept_param(uint32_t type, uint64_t param)
             uint64_t addr = ldq_phys(env->vm_vmcb + offsetof(struct vmcb, control.iopm_base_pa));
             uint16_t port = (uint16_t) (param >> 16);
  
-            if(ldub_phys(addr + port / 8) & (1 << (port % 8)))
+            uint16_t mask = (1 << ((param >> 4) & 7)) - 1;
+            if(lduw_phys(addr + port / 8) & (mask << (port & 7)))
                 vmexit(type, param);
         }
         break;