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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__ */ |