tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
29struct 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 */
38struct kvm_exit_mmio {
39 phys_addr_t phys_addr;
40 u8 data[8];
41 u32 len;
42 bool is_write;
43};
44
45static 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
55int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
56int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run,
57 phys_addr_t fault_ipa);
58
59#endif /* __ARM64_KVM_MMIO_H__ */