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
kvm_prepare_mmio(struct kvm_run * run,struct kvm_exit_mmio * mmio)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__ */
60