x86/efi: Enforce CONFIG_RELOCATABLE for EFI boot stub
[linux/fpc-iii.git] / arch / powerpc / kvm / 44x.c
blob2f5c6b6d687709ecd7a71f0f7985a48974b075f5
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.
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.
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.
15 * Copyright IBM Corp. 2008
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
20 #include <linux/kvm_host.h>
21 #include <linux/slab.h>
22 #include <linux/err.h>
23 #include <linux/export.h>
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>
31 #include "44x_tlb.h"
32 #include "booke.h"
34 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
36 kvmppc_booke_vcpu_load(vcpu, cpu);
37 kvmppc_44x_tlb_load(vcpu);
40 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
42 kvmppc_44x_tlb_put(vcpu);
43 kvmppc_booke_vcpu_put(vcpu);
46 int kvmppc_core_check_processor_compat(void)
48 int r;
50 if (strncmp(cur_cpu_spec->platform, "ppc440", 6) == 0)
51 r = 0;
52 else
53 r = -ENOTSUPP;
55 return r;
58 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
60 struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
61 struct kvmppc_44x_tlbe *tlbe = &vcpu_44x->guest_tlb[0];
62 int i;
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;
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;
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);
82 for (i = 0; i < ARRAY_SIZE(vcpu_44x->shadow_refs); i++)
83 vcpu_44x->shadow_refs[i].gtlb_index = -1;
85 vcpu->arch.cpu_type = KVM_CPU_440;
86 vcpu->arch.pvr = mfspr(SPRN_PVR);
88 return 0;
91 /* 'linear_address' is actually an encoding of AS|PID|EADDR . */
92 int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
93 struct kvm_translation *tr)
95 int index;
96 gva_t eaddr;
97 u8 pid;
98 u8 as;
100 eaddr = tr->linear_address;
101 pid = (tr->linear_address >> 32) & 0xff;
102 as = (tr->linear_address >> 40) & 0x1;
104 index = kvmppc_44x_tlb_index(vcpu, eaddr, pid, as);
105 if (index == -1) {
106 tr->valid = 0;
107 return 0;
110 tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
111 /* XXX what does "writeable" and "usermode" even mean? */
112 tr->valid = 1;
114 return 0;
117 void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
119 kvmppc_get_sregs_ivor(vcpu, sregs);
122 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
124 return kvmppc_set_sregs_ivor(vcpu, sregs);
127 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
128 union kvmppc_one_reg *val)
130 return -EINVAL;
133 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
134 union kvmppc_one_reg *val)
136 return -EINVAL;
139 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
141 struct kvmppc_vcpu_44x *vcpu_44x;
142 struct kvm_vcpu *vcpu;
143 int err;
145 vcpu_44x = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
146 if (!vcpu_44x) {
147 err = -ENOMEM;
148 goto out;
151 vcpu = &vcpu_44x->vcpu;
152 err = kvm_vcpu_init(vcpu, kvm, id);
153 if (err)
154 goto free_vcpu;
156 vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
157 if (!vcpu->arch.shared)
158 goto uninit_vcpu;
160 return vcpu;
162 uninit_vcpu:
163 kvm_vcpu_uninit(vcpu);
164 free_vcpu:
165 kmem_cache_free(kvm_vcpu_cache, vcpu_44x);
166 out:
167 return ERR_PTR(err);
170 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
172 struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
174 free_page((unsigned long)vcpu->arch.shared);
175 kvm_vcpu_uninit(vcpu);
176 kmem_cache_free(kvm_vcpu_cache, vcpu_44x);
179 int kvmppc_core_init_vm(struct kvm *kvm)
181 return 0;
184 void kvmppc_core_destroy_vm(struct kvm *kvm)
188 static int __init kvmppc_44x_init(void)
190 int r;
192 r = kvmppc_booke_init();
193 if (r)
194 return r;
196 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_44x), 0, THIS_MODULE);
199 static void __exit kvmppc_44x_exit(void)
201 kvmppc_booke_exit();
204 module_init(kvmppc_44x_init);
205 module_exit(kvmppc_44x_exit);