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Hollis Blanchard9dd921c2008-11-05 09:36:14 -06001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090021#include <linux/slab.h>
Hollis Blancharddb93f572008-11-05 09:36:18 -060022#include <linux/err.h>
Paul Gortmaker93087942011-07-29 16:19:31 +100023#include <linux/export.h>
Hollis Blancharddb93f572008-11-05 09:36:18 -060024
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060025#include <asm/reg.h>
26#include <asm/cputable.h>
27#include <asm/tlbflush.h>
Hollis Blancharddb93f572008-11-05 09:36:18 -060028#include <asm/kvm_44x.h>
29#include <asm/kvm_ppc.h>
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060030
31#include "44x_tlb.h"
Scott Wood94fa9d92011-12-20 15:34:22 +000032#include "booke.h"
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060033
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060034void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
35{
Scott Wood94fa9d92011-12-20 15:34:22 +000036 kvmppc_booke_vcpu_load(vcpu, cpu);
Hollis Blanchardc5fbdff2008-12-02 15:51:56 -060037 kvmppc_44x_tlb_load(vcpu);
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060038}
39
40void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
41{
Hollis Blanchardc5fbdff2008-12-02 15:51:56 -060042 kvmppc_44x_tlb_put(vcpu);
Scott Wood94fa9d92011-12-20 15:34:22 +000043 kvmppc_booke_vcpu_put(vcpu);
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060044}
45
46int kvmppc_core_check_processor_compat(void)
47{
48 int r;
49
Hollis Blanchardebc658742010-08-07 10:33:58 -070050 if (strncmp(cur_cpu_spec->platform, "ppc440", 6) == 0)
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060051 r = 0;
52 else
53 r = -ENOTSUPP;
54
55 return r;
56}
Hollis Blanchard5cbb5102008-11-05 09:36:17 -060057
58int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
59{
Hollis Blancharddb93f572008-11-05 09:36:18 -060060 struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
61 struct kvmppc_44x_tlbe *tlbe = &vcpu_44x->guest_tlb[0];
Hollis Blanchard7924bd42008-12-02 15:51:55 -060062 int i;
Hollis Blanchard5cbb5102008-11-05 09:36:17 -060063
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]. */
Hollis Blanchardebc658742010-08-07 10:33:58 -070079 /* XXX CCR1 doesn't exist on all 440 SoCs. */
Hollis Blanchard5cbb5102008-11-05 09:36:17 -060080 vcpu->arch.ccr1 = mfspr(SPRN_CCR1);
81
Hollis Blanchard7924bd42008-12-02 15:51:55 -060082 for (i = 0; i < ARRAY_SIZE(vcpu_44x->shadow_refs); i++)
83 vcpu_44x->shadow_refs[i].gtlb_index = -1;
84
Alexander Grafaf8f38b2011-08-10 13:57:08 +020085 vcpu->arch.cpu_type = KVM_CPU_440;
Alexander Graf491dd5b2012-08-13 14:40:29 +020086 vcpu->arch.pvr = mfspr(SPRN_PVR);
Alexander Grafaf8f38b2011-08-10 13:57:08 +020087
Hollis Blanchard5cbb5102008-11-05 09:36:17 -060088 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{
Hollis Blanchard5cbb5102008-11-05 09:36:17 -060095 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
Hollis Blanchardbe8d1ca2009-01-03 16:23:02 -0600110 tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
Hollis Blanchard5cbb5102008-11-05 09:36:17 -0600111 /* XXX what does "writeable" and "usermode" even mean? */
112 tr->valid = 1;
113
114 return 0;
115}
Hollis Blancharddb93f572008-11-05 09:36:18 -0600116
Scott Wood5ce941e2011-04-27 17:24:21 -0500117void 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
Hollis Blancharddb93f572008-11-05 09:36:18 -0600127struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
128{
129 struct kvmppc_vcpu_44x *vcpu_44x;
130 struct kvm_vcpu *vcpu;
131 int err;
132
133 vcpu_44x = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
134 if (!vcpu_44x) {
135 err = -ENOMEM;
136 goto out;
137 }
138
139 vcpu = &vcpu_44x->vcpu;
140 err = kvm_vcpu_init(vcpu, kvm, id);
141 if (err)
142 goto free_vcpu;
143
Alexander Graf96bc4512010-07-29 14:47:42 +0200144 vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
145 if (!vcpu->arch.shared)
146 goto uninit_vcpu;
147
Hollis Blancharddb93f572008-11-05 09:36:18 -0600148 return vcpu;
149
Alexander Graf96bc4512010-07-29 14:47:42 +0200150uninit_vcpu:
151 kvm_vcpu_uninit(vcpu);
Hollis Blancharddb93f572008-11-05 09:36:18 -0600152free_vcpu:
153 kmem_cache_free(kvm_vcpu_cache, vcpu_44x);
154out:
155 return ERR_PTR(err);
156}
157
158void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
159{
160 struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
161
Alexander Graf96bc4512010-07-29 14:47:42 +0200162 free_page((unsigned long)vcpu->arch.shared);
Hollis Blancharddb93f572008-11-05 09:36:18 -0600163 kvm_vcpu_uninit(vcpu);
164 kmem_cache_free(kvm_vcpu_cache, vcpu_44x);
165}
166
Scott Woodfafd6832011-12-20 15:34:26 +0000167int kvmppc_core_init_vm(struct kvm *kvm)
168{
169 return 0;
170}
171
172void kvmppc_core_destroy_vm(struct kvm *kvm)
173{
174}
175
Stephen Rothwell2986b8c2009-06-02 11:46:14 +1000176static int __init kvmppc_44x_init(void)
Hollis Blancharddb93f572008-11-05 09:36:18 -0600177{
178 int r;
179
180 r = kvmppc_booke_init();
181 if (r)
182 return r;
183
Avi Kivity0ee75be2010-04-28 15:39:01 +0300184 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_44x), 0, THIS_MODULE);
Hollis Blancharddb93f572008-11-05 09:36:18 -0600185}
186
Stephen Rothwell2986b8c2009-06-02 11:46:14 +1000187static void __exit kvmppc_44x_exit(void)
Hollis Blancharddb93f572008-11-05 09:36:18 -0600188{
189 kvmppc_booke_exit();
190}
191
192module_init(kvmppc_44x_init);
193module_exit(kvmppc_44x_exit);