1 files changed, 8 insertions, 0 deletions
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 5af434dde6..9d52cf3a34 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -163,6 +163,8 @@ struct kvm_run;
  * @gdb_num_regs: Number of total registers accessible to GDB.
  * @gdb_num_g_regs: Number of registers in GDB 'g' packets.
  * @next_cpu: Next CPU sharing TB cache.
+ * @mem_io_pc: Host Program Counter at which the memory was accessed.
+ * @mem_io_vaddr: Target virtual address at which the memory was accessed.
  * @kvm_fd: vCPU file descriptor for KVM.
  *
  * State of one CPU core or thread.
@@ -204,6 +206,12 @@ struct CPUState {
     int gdb_num_g_regs;
     QTAILQ_ENTRY(CPUState) node;
 
+    /* In order to avoid passing too many arguments to the MMIO helpers,
+     * we store some rarely used information in the CPU context.
+     */
+    uintptr_t mem_io_pc;
+    vaddr mem_io_vaddr;
+
     int kvm_fd;
     bool kvm_vcpu_dirty;
     struct KVMState *kvm_state;