arch/arm64/include/asm/kvm_mmio.h

   1 /*
   2  * Copyright (C) 2012 - Virtual Open Systems and Columbia University
   3  * Author: Christoffer Dall <c.dall@virtualopensystems.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License, version 2, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __ARM64_KVM_MMIO_H__
  19 #define __ARM64_KVM_MMIO_H__
  20
  21 #include <linux/kvm_host.h>
  22 #include <asm/kvm_asm.h>
  23 #include <asm/kvm_arm.h>
  24
  25 /*
  26  * This is annoying. The mmio code requires this, even if we don't
  27  * need any decoding. To be fixed.
  28  */
  29 struct kvm_decode {
  30         unsigned long rt;
  31         bool sign_extend;
  32 };
  33
  34 /*
  35  * The in-kernel MMIO emulation code wants to use a copy of run->mmio,
  36  * which is an anonymous type. Use our own type instead.
  37  */
  38 struct kvm_exit_mmio {
  39         phys_addr_t     phys_addr;
  40         u8              data[8];
  41         u32             len;
  42         bool            is_write;
  43 };
  44
  45 static inline void kvm_prepare_mmio(struct kvm_run *run,
  46                                     struct kvm_exit_mmio *mmio)
  47 {
  48         run->mmio.phys_addr     = mmio->phys_addr;
  49         run->mmio.len           = mmio->len;
  50         run->mmio.is_write      = mmio->is_write;
  51         memcpy(run->mmio.data, mmio->data, mmio->len);
  52         run->exit_reason        = KVM_EXIT_MMIO;
  53 }
  54
  55 int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
  56 int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run,
  57                  phys_addr_t fault_ipa);
  58
  59 #endif  /* __ARM64_KVM_MMIO_H__ */