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Commit | Line | Data |
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4c071ee5 | 1 | #include <xen/xen.h> |
0ec53ecf | 2 | #include <xen/events.h> |
b3b52fd8 SS |
3 | #include <xen/grant_table.h> |
4 | #include <xen/hvm.h> | |
9a9ab3cc | 5 | #include <xen/interface/vcpu.h> |
4c071ee5 SS |
6 | #include <xen/interface/xen.h> |
7 | #include <xen/interface/memory.h> | |
b3b52fd8 | 8 | #include <xen/interface/hvm/params.h> |
ef61ee0d | 9 | #include <xen/features.h> |
4c071ee5 | 10 | #include <xen/platform_pci.h> |
b3b52fd8 | 11 | #include <xen/xenbus.h> |
c61ba729 | 12 | #include <xen/page.h> |
6abb749e | 13 | #include <xen/interface/sched.h> |
f832da06 | 14 | #include <xen/xen-ops.h> |
4c071ee5 SS |
15 | #include <asm/xen/hypervisor.h> |
16 | #include <asm/xen/hypercall.h> | |
6abb749e | 17 | #include <asm/system_misc.h> |
0ec53ecf SS |
18 | #include <linux/interrupt.h> |
19 | #include <linux/irqreturn.h> | |
4c071ee5 | 20 | #include <linux/module.h> |
2e01f166 SS |
21 | #include <linux/of.h> |
22 | #include <linux/of_irq.h> | |
23 | #include <linux/of_address.h> | |
e1a9c16b JG |
24 | #include <linux/cpuidle.h> |
25 | #include <linux/cpufreq.h> | |
8b271d57 | 26 | #include <linux/cpu.h> |
4c071ee5 | 27 | |
f832da06 IC |
28 | #include <linux/mm.h> |
29 | ||
4c071ee5 SS |
30 | struct start_info _xen_start_info; |
31 | struct start_info *xen_start_info = &_xen_start_info; | |
35c8ab4c | 32 | EXPORT_SYMBOL(xen_start_info); |
4c071ee5 SS |
33 | |
34 | enum xen_domain_type xen_domain_type = XEN_NATIVE; | |
35c8ab4c | 35 | EXPORT_SYMBOL(xen_domain_type); |
4c071ee5 SS |
36 | |
37 | struct shared_info xen_dummy_shared_info; | |
38 | struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info; | |
39 | ||
40 | DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu); | |
9a9ab3cc | 41 | static struct vcpu_info __percpu *xen_vcpu_info; |
4c071ee5 | 42 | |
c61ba729 IC |
43 | /* These are unused until we support booting "pre-ballooned" */ |
44 | unsigned long xen_released_pages; | |
45 | struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata; | |
46 | ||
4c071ee5 SS |
47 | /* TODO: to be removed */ |
48 | __read_mostly int xen_have_vector_callback; | |
49 | EXPORT_SYMBOL_GPL(xen_have_vector_callback); | |
50 | ||
51 | int xen_platform_pci_unplug = XEN_UNPLUG_ALL; | |
52 | EXPORT_SYMBOL_GPL(xen_platform_pci_unplug); | |
53 | ||
81e863c3 | 54 | static __read_mostly unsigned int xen_events_irq; |
0ec53ecf | 55 | |
5882bfef SS |
56 | static __initdata struct device_node *xen_node; |
57 | ||
4e8c0c8c | 58 | int xen_remap_domain_mfn_array(struct vm_area_struct *vma, |
4c071ee5 | 59 | unsigned long addr, |
4e8c0c8c DV |
60 | xen_pfn_t *mfn, int nr, |
61 | int *err_ptr, pgprot_t prot, | |
62 | unsigned domid, | |
f832da06 | 63 | struct page **pages) |
4c071ee5 | 64 | { |
4e8c0c8c | 65 | return xen_xlate_remap_gfn_array(vma, addr, mfn, nr, err_ptr, |
628c28ee | 66 | prot, domid, pages); |
4c071ee5 | 67 | } |
4e8c0c8c DV |
68 | EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_array); |
69 | ||
70 | /* Not used by XENFEAT_auto_translated guests. */ | |
71 | int xen_remap_domain_mfn_range(struct vm_area_struct *vma, | |
72 | unsigned long addr, | |
73 | xen_pfn_t mfn, int nr, | |
74 | pgprot_t prot, unsigned domid, | |
75 | struct page **pages) | |
76 | { | |
77 | return -ENOSYS; | |
78 | } | |
4c071ee5 | 79 | EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range); |
2e01f166 | 80 | |
f832da06 IC |
81 | int xen_unmap_domain_mfn_range(struct vm_area_struct *vma, |
82 | int nr, struct page **pages) | |
83 | { | |
628c28ee | 84 | return xen_xlate_unmap_gfn_range(vma, nr, pages); |
f832da06 IC |
85 | } |
86 | EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range); | |
87 | ||
8b271d57 | 88 | static void xen_percpu_init(void) |
9a9ab3cc SS |
89 | { |
90 | struct vcpu_register_vcpu_info info; | |
91 | struct vcpu_info *vcpup; | |
92 | int err; | |
3cc8e40e | 93 | int cpu = get_cpu(); |
9a9ab3cc SS |
94 | |
95 | pr_info("Xen: initializing cpu%d\n", cpu); | |
96 | vcpup = per_cpu_ptr(xen_vcpu_info, cpu); | |
97 | ||
98 | info.mfn = __pa(vcpup) >> PAGE_SHIFT; | |
99 | info.offset = offset_in_page(vcpup); | |
100 | ||
101 | err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info); | |
d7266d78 SS |
102 | BUG_ON(err); |
103 | per_cpu(xen_vcpu, cpu) = vcpup; | |
104 | ||
3cc8e40e | 105 | enable_percpu_irq(xen_events_irq, 0); |
0d7febe5 | 106 | put_cpu(); |
9a9ab3cc SS |
107 | } |
108 | ||
2451ade0 | 109 | static void xen_restart(enum reboot_mode reboot_mode, const char *cmd) |
6abb749e SS |
110 | { |
111 | struct sched_shutdown r = { .reason = SHUTDOWN_reboot }; | |
112 | int rc; | |
113 | rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &r); | |
a91c7775 | 114 | BUG_ON(rc); |
6abb749e SS |
115 | } |
116 | ||
117 | static void xen_power_off(void) | |
118 | { | |
119 | struct sched_shutdown r = { .reason = SHUTDOWN_poweroff }; | |
120 | int rc; | |
121 | rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &r); | |
a91c7775 | 122 | BUG_ON(rc); |
6abb749e SS |
123 | } |
124 | ||
8b271d57 JG |
125 | static int xen_cpu_notification(struct notifier_block *self, |
126 | unsigned long action, | |
127 | void *hcpu) | |
128 | { | |
129 | switch (action) { | |
130 | case CPU_STARTING: | |
131 | xen_percpu_init(); | |
132 | break; | |
133 | default: | |
134 | break; | |
135 | } | |
136 | ||
137 | return NOTIFY_OK; | |
138 | } | |
139 | ||
140 | static struct notifier_block xen_cpu_notifier = { | |
141 | .notifier_call = xen_cpu_notification, | |
142 | }; | |
143 | ||
144 | static irqreturn_t xen_arm_callback(int irq, void *arg) | |
145 | { | |
146 | xen_hvm_evtchn_do_upcall(); | |
147 | return IRQ_HANDLED; | |
148 | } | |
149 | ||
2e01f166 SS |
150 | /* |
151 | * see Documentation/devicetree/bindings/arm/xen.txt for the | |
152 | * documentation of the Xen Device Tree format. | |
153 | */ | |
b3b52fd8 | 154 | #define GRANT_TABLE_PHYSADDR 0 |
5882bfef | 155 | void __init xen_early_init(void) |
2e01f166 | 156 | { |
2e01f166 SS |
157 | int len; |
158 | const char *s = NULL; | |
159 | const char *version = NULL; | |
160 | const char *xen_prefix = "xen,xen-"; | |
161 | ||
5882bfef SS |
162 | xen_node = of_find_compatible_node(NULL, NULL, "xen,xen"); |
163 | if (!xen_node) { | |
2e01f166 | 164 | pr_debug("No Xen support\n"); |
5882bfef | 165 | return; |
2e01f166 | 166 | } |
5882bfef | 167 | s = of_get_property(xen_node, "compatible", &len); |
2e01f166 SS |
168 | if (strlen(xen_prefix) + 3 < len && |
169 | !strncmp(xen_prefix, s, strlen(xen_prefix))) | |
170 | version = s + strlen(xen_prefix); | |
171 | if (version == NULL) { | |
172 | pr_debug("Xen version not found\n"); | |
5882bfef | 173 | return; |
81e863c3 JG |
174 | } |
175 | ||
5882bfef | 176 | pr_info("Xen %s support found\n", version); |
8b271d57 | 177 | |
2e01f166 SS |
178 | xen_domain_type = XEN_HVM_DOMAIN; |
179 | ||
ef61ee0d | 180 | xen_setup_features(); |
5ebc77de | 181 | |
ef61ee0d SS |
182 | if (xen_feature(XENFEAT_dom0)) |
183 | xen_start_info->flags |= SIF_INITDOMAIN|SIF_PRIVILEGED; | |
184 | else | |
185 | xen_start_info->flags &= ~(SIF_INITDOMAIN|SIF_PRIVILEGED); | |
5882bfef SS |
186 | } |
187 | ||
188 | static int __init xen_guest_init(void) | |
189 | { | |
190 | struct xen_add_to_physmap xatp; | |
191 | struct shared_info *shared_info_page = NULL; | |
192 | struct resource res; | |
193 | phys_addr_t grant_frames; | |
194 | ||
195 | if (!xen_domain()) | |
196 | return 0; | |
197 | ||
198 | if (of_address_to_resource(xen_node, GRANT_TABLE_PHYSADDR, &res)) { | |
199 | pr_err("Xen grant table base address not found\n"); | |
200 | return -ENODEV; | |
201 | } | |
202 | grant_frames = res.start; | |
203 | ||
204 | xen_events_irq = irq_of_parse_and_map(xen_node, 0); | |
205 | if (!xen_events_irq) { | |
206 | pr_err("Xen event channel interrupt not found\n"); | |
207 | return -ENODEV; | |
208 | } | |
209 | ||
210 | shared_info_page = (struct shared_info *)get_zeroed_page(GFP_KERNEL); | |
ef61ee0d | 211 | |
2e01f166 SS |
212 | if (!shared_info_page) { |
213 | pr_err("not enough memory\n"); | |
214 | return -ENOMEM; | |
215 | } | |
216 | xatp.domid = DOMID_SELF; | |
217 | xatp.idx = 0; | |
218 | xatp.space = XENMAPSPACE_shared_info; | |
219 | xatp.gpfn = __pa(shared_info_page) >> PAGE_SHIFT; | |
220 | if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp)) | |
221 | BUG(); | |
222 | ||
223 | HYPERVISOR_shared_info = (struct shared_info *)shared_info_page; | |
224 | ||
225 | /* xen_vcpu is a pointer to the vcpu_info struct in the shared_info | |
226 | * page, we use it in the event channel upcall and in some pvclock | |
9a9ab3cc | 227 | * related functions. |
2e01f166 SS |
228 | * The shared info contains exactly 1 CPU (the boot CPU). The guest |
229 | * is required to use VCPUOP_register_vcpu_info to place vcpu info | |
9a9ab3cc SS |
230 | * for secondary CPUs as they are brought up. |
231 | * For uniformity we use VCPUOP_register_vcpu_info even on cpu0. | |
232 | */ | |
233 | xen_vcpu_info = __alloc_percpu(sizeof(struct vcpu_info), | |
234 | sizeof(struct vcpu_info)); | |
235 | if (xen_vcpu_info == NULL) | |
236 | return -ENOMEM; | |
b3b52fd8 | 237 | |
efaf30a3 KRW |
238 | if (gnttab_setup_auto_xlat_frames(grant_frames)) { |
239 | free_percpu(xen_vcpu_info); | |
240 | return -ENOMEM; | |
241 | } | |
b3b52fd8 SS |
242 | gnttab_init(); |
243 | if (!xen_initial_domain()) | |
244 | xenbus_probe(NULL); | |
245 | ||
e1a9c16b JG |
246 | /* |
247 | * Making sure board specific code will not set up ops for | |
248 | * cpu idle and cpu freq. | |
249 | */ | |
250 | disable_cpuidle(); | |
251 | disable_cpufreq(); | |
252 | ||
8b271d57 JG |
253 | xen_init_IRQ(); |
254 | ||
255 | if (request_percpu_irq(xen_events_irq, xen_arm_callback, | |
256 | "events", &xen_vcpu)) { | |
257 | pr_err("Error request IRQ %d\n", xen_events_irq); | |
258 | return -EINVAL; | |
259 | } | |
260 | ||
261 | xen_percpu_init(); | |
262 | ||
263 | register_cpu_notifier(&xen_cpu_notifier); | |
264 | ||
1aa3d8d9 SS |
265 | return 0; |
266 | } | |
8b271d57 | 267 | early_initcall(xen_guest_init); |
1aa3d8d9 SS |
268 | |
269 | static int __init xen_pm_init(void) | |
270 | { | |
9dd4b294 RH |
271 | if (!xen_domain()) |
272 | return -ENODEV; | |
273 | ||
6abb749e SS |
274 | pm_power_off = xen_power_off; |
275 | arm_pm_restart = xen_restart; | |
276 | ||
2e01f166 SS |
277 | return 0; |
278 | } | |
9dd4b294 | 279 | late_initcall(xen_pm_init); |
0ec53ecf | 280 | |
79390289 SS |
281 | |
282 | /* empty stubs */ | |
283 | void xen_arch_pre_suspend(void) { } | |
284 | void xen_arch_post_suspend(int suspend_cancelled) { } | |
285 | void xen_timer_resume(void) { } | |
286 | void xen_arch_resume(void) { } | |
ffb7dbed | 287 | void xen_arch_suspend(void) { } |
79390289 SS |
288 | |
289 | ||
911dec0d KRW |
290 | /* In the hypervisor.S file. */ |
291 | EXPORT_SYMBOL_GPL(HYPERVISOR_event_channel_op); | |
292 | EXPORT_SYMBOL_GPL(HYPERVISOR_grant_table_op); | |
ab277bbf SS |
293 | EXPORT_SYMBOL_GPL(HYPERVISOR_xen_version); |
294 | EXPORT_SYMBOL_GPL(HYPERVISOR_console_io); | |
295 | EXPORT_SYMBOL_GPL(HYPERVISOR_sched_op); | |
296 | EXPORT_SYMBOL_GPL(HYPERVISOR_hvm_op); | |
297 | EXPORT_SYMBOL_GPL(HYPERVISOR_memory_op); | |
298 | EXPORT_SYMBOL_GPL(HYPERVISOR_physdev_op); | |
ea0af613 | 299 | EXPORT_SYMBOL_GPL(HYPERVISOR_vcpu_op); |
176455e9 | 300 | EXPORT_SYMBOL_GPL(HYPERVISOR_tmem_op); |
9f1d3414 | 301 | EXPORT_SYMBOL_GPL(HYPERVISOR_multicall); |
911dec0d | 302 | EXPORT_SYMBOL_GPL(privcmd_call); |