target-arm/kvm_arm.h

   1 /*
   2  * QEMU KVM support -- ARM specific functions.
   3  *
   4  * Copyright (c) 2012 Linaro Limited
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  *
   9  */
  10
  11 #ifndef QEMU_KVM_ARM_H
  12 #define QEMU_KVM_ARM_H
  13
  14 #include "sysemu/kvm.h"
  15 #include "exec/memory.h"
  16
  17 /**
  18  * kvm_arm_register_device:
  19  * @mr: memory region for this device
  20  * @devid: the KVM device ID
  21  *
  22  * Remember the memory region @mr, and when it is mapped by the
  23  * machine model, tell the kernel that base address using the
  24  * KVM_SET_DEVICE_ADDRESS ioctl. @devid should be the ID of
  25  * the device as defined by KVM_SET_DEVICE_ADDRESS.
  26  * The machine model may map and unmap the device multiple times;
  27  * the kernel will only be told the final address at the point
  28  * where machine init is complete.
  29  */
  30 void kvm_arm_register_device(MemoryRegion *mr, uint64_t devid);
  31
  32 /**
  33  * write_list_to_kvmstate:
  34  * @cpu: ARMCPU
  35  *
  36  * For each register listed in the ARMCPU cpreg_indexes list, write
  37  * its value from the cpreg_values list into the kernel (via ioctl).
  38  * This updates KVM's working data structures from TCG data or
  39  * from incoming migration state.
  40  *
  41  * Returns: true if all register values were updated correctly,
  42  * false if some register was unknown to the kernel or could not
  43  * be written (eg constant register with the wrong value).
  44  * Note that we do not stop early on failure -- we will attempt
  45  * writing all registers in the list.
  46  */
  47 bool write_list_to_kvmstate(ARMCPU *cpu);
  48
  49 /**
  50  * write_kvmstate_to_list:
  51  * @cpu: ARMCPU
  52  *
  53  * For each register listed in the ARMCPU cpreg_indexes list, write
  54  * its value from the kernel into the cpreg_values list. This is used to
  55  * copy info from KVM's working data structures into TCG or
  56  * for outbound migration.
  57  *
  58  * Returns: true if all register values were read correctly,
  59  * false if some register was unknown or could not be read.
  60  * Note that we do not stop early on failure -- we will attempt
  61  * reading all registers in the list.
  62  */
  63 bool write_kvmstate_to_list(ARMCPU *cpu);
  64
  65 #endif