tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#include <linux/kvm_host.h>
21#include <linux/slab.h>
22#include <linux/err.h>
23#include <linux/export.h>
24
25#include <asm/reg.h>
26#include <asm/cputable.h>
27#include <asm/tlbflush.h>
28#include <asm/kvm_44x.h>
29#include <asm/kvm_ppc.h>
30
31#include "44x_tlb.h"
32#include "booke.h"
33
34void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
35{
36 kvmppc_booke_vcpu_load(vcpu, cpu);
37 kvmppc_44x_tlb_load(vcpu);
38}
39
40void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
41{
42 kvmppc_44x_tlb_put(vcpu);
43 kvmppc_booke_vcpu_put(vcpu);
44}
45
46int kvmppc_core_check_processor_compat(void)
47{
48 int r;
49
50 if (strncmp(cur_cpu_spec->platform, "ppc440", 6) == 0)
51 r = 0;
52 else
53 r = -ENOTSUPP;
54
55 return r;
56}
57
58int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
59{
60 struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
61 struct kvmppc_44x_tlbe *tlbe = &vcpu_44x->guest_tlb[0];
62 int i;
63
64 tlbe->tid = 0;
65 tlbe->word0 = PPC44x_TLB_16M | PPC44x_TLB_VALID;
66 tlbe->word1 = 0;
67 tlbe->word2 = PPC44x_TLB_SX | PPC44x_TLB_SW | PPC44x_TLB_SR;
68
69 tlbe++;
70 tlbe->tid = 0;
71 tlbe->word0 = 0xef600000 | PPC44x_TLB_4K | PPC44x_TLB_VALID;
72 tlbe->word1 = 0xef600000;
73 tlbe->word2 = PPC44x_TLB_SX | PPC44x_TLB_SW | PPC44x_TLB_SR
74 | PPC44x_TLB_I | PPC44x_TLB_G;
75
76 /* Since the guest can directly access the timebase, it must know the
77 * real timebase frequency. Accordingly, it must see the state of
78 * CCR1[TCS]. */
79 /* XXX CCR1 doesn't exist on all 440 SoCs. */
80 vcpu->arch.ccr1 = mfspr(SPRN_CCR1);
81
82 for (i = 0; i < ARRAY_SIZE(vcpu_44x->shadow_refs); i++)
83 vcpu_44x->shadow_refs[i].gtlb_index = -1;
84
85 vcpu->arch.cpu_type = KVM_CPU_440;
86 vcpu->arch.pvr = mfspr(SPRN_PVR);
87
88 return 0;
89}
90
91/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
92int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
93 struct kvm_translation *tr)
94{
95 int index;
96 gva_t eaddr;
97 u8 pid;
98 u8 as;
99
100 eaddr = tr->linear_address;
101 pid = (tr->linear_address >> 32) & 0xff;
102 as = (tr->linear_address >> 40) & 0x1;
103
104 index = kvmppc_44x_tlb_index(vcpu, eaddr, pid, as);
105 if (index == -1) {
106 tr->valid = 0;
107 return 0;
108 }
109
110 tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
111 /* XXX what does "writeable" and "usermode" even mean? */
112 tr->valid = 1;
113
114 return 0;
115}
116
117void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
118{
119 kvmppc_get_sregs_ivor(vcpu, sregs);
120}
121
122int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
123{
124 return kvmppc_set_sregs_ivor(vcpu, sregs);
125}
126
127int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
128 union kvmppc_one_reg *val)
129{
130 return -EINVAL;
131}
132
133int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
134 union kvmppc_one_reg *val)
135{
136 return -EINVAL;
137}
138
139struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
140{
141 struct kvmppc_vcpu_44x *vcpu_44x;
142 struct kvm_vcpu *vcpu;
143 int err;
144
145 vcpu_44x = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
146 if (!vcpu_44x) {
147 err = -ENOMEM;
148 goto out;
149 }
150
151 vcpu = &vcpu_44x->vcpu;
152 err = kvm_vcpu_init(vcpu, kvm, id);
153 if (err)
154 goto free_vcpu;
155
156 vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
157 if (!vcpu->arch.shared)
158 goto uninit_vcpu;
159
160 return vcpu;
161
162uninit_vcpu:
163 kvm_vcpu_uninit(vcpu);
164free_vcpu:
165 kmem_cache_free(kvm_vcpu_cache, vcpu_44x);
166out:
167 return ERR_PTR(err);
168}
169
170void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
171{
172 struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
173
174 free_page((unsigned long)vcpu->arch.shared);
175 kvm_vcpu_uninit(vcpu);
176 kmem_cache_free(kvm_vcpu_cache, vcpu_44x);
177}
178
179int kvmppc_core_init_vm(struct kvm *kvm)
180{
181 return 0;
182}
183
184void kvmppc_core_destroy_vm(struct kvm *kvm)
185{
186}
187
188static int __init kvmppc_44x_init(void)
189{
190 int r;
191
192 r = kvmppc_booke_init();
193 if (r)
194 return r;
195
196 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_44x), 0, THIS_MODULE);
197}
198
199static void __exit kvmppc_44x_exit(void)
200{
201 kvmppc_booke_exit();
202}
203
204module_init(kvmppc_44x_init);
205module_exit(kvmppc_44x_exit);