kvm_ppc.h revision 0f55dc481ea5c4f87fc0161cb1b8c6e2cafae8fc 
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
14 *
15 * Copyright IBM Corp. 2008
16 *
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 */
19
20#ifndef __POWERPC_KVM_PPC_H__
21#define __POWERPC_KVM_PPC_H__
22
23/* This file exists just so we can dereference kvm_vcpu, avoiding nested header
24 * dependencies. */
25
26#include <linux/mutex.h>
27#include <linux/timer.h>
28#include <linux/types.h>
29#include <linux/kvm_types.h>
30#include <linux/kvm_host.h>
31
32enum emulation_result {
33	EMULATE_DONE,         /* no further processing */
34	EMULATE_DO_MMIO,      /* kvm_run filled with MMIO request */
35	EMULATE_DO_DCR,       /* kvm_run filled with DCR request */
36	EMULATE_FAIL,         /* can't emulate this instruction */
37};
38
39extern const unsigned char exception_priority[];
40extern const unsigned char priority_exception[];
41
42extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
43extern char kvmppc_handlers_start[];
44extern unsigned long kvmppc_handler_len;
45
46extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
47extern int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
48                              unsigned int rt, unsigned int bytes,
49                              int is_bigendian);
50extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
51                               u32 val, unsigned int bytes, int is_bigendian);
52
53extern int kvmppc_emulate_instruction(struct kvm_run *run,
54                                      struct kvm_vcpu *vcpu);
55extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
56extern int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws);
57extern int kvmppc_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb, u8 rc);
58
59extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn,
60                           u64 asid, u32 flags);
61extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
62extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
63
64/* XXX Book E specific */
65extern void kvmppc_tlbe_set_modified(struct kvm_vcpu *vcpu, unsigned int i);
66
67extern void kvmppc_check_and_deliver_interrupts(struct kvm_vcpu *vcpu);
68
69static inline void kvmppc_queue_exception(struct kvm_vcpu *vcpu, int exception)
70{
71	unsigned int priority = exception_priority[exception];
72	set_bit(priority, &vcpu->arch.pending_exceptions);
73}
74
75static inline void kvmppc_clear_exception(struct kvm_vcpu *vcpu, int exception)
76{
77	unsigned int priority = exception_priority[exception];
78	clear_bit(priority, &vcpu->arch.pending_exceptions);
79}
80
81/* Helper function for "full" MSR writes. No need to call this if only EE is
82 * changing. */
83static inline void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
84{
85	if ((new_msr & MSR_PR) != (vcpu->arch.msr & MSR_PR))
86		kvmppc_mmu_priv_switch(vcpu, new_msr & MSR_PR);
87
88	vcpu->arch.msr = new_msr;
89
90	if (vcpu->arch.msr & MSR_WE)
91		kvm_vcpu_block(vcpu);
92}
93
94static inline void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 new_pid)
95{
96	if (vcpu->arch.pid != new_pid) {
97		vcpu->arch.pid = new_pid;
98		vcpu->arch.swap_pid = 1;
99	}
100}
101
102extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
103
104#endif /* __POWERPC_KVM_PPC_H__ */
105