2 #include <xen/events.h>
3 #include <xen/grant_table.h>
5 #include <xen/interface/vcpu.h>
6 #include <xen/interface/xen.h>
7 #include <xen/interface/memory.h>
8 #include <xen/interface/hvm/params.h>
9 #include <xen/features.h>
10 #include <xen/platform_pci.h>
11 #include <xen/xenbus.h>
13 #include <xen/interface/sched.h>
14 #include <xen/xen-ops.h>
15 #include <asm/xen/hypervisor.h>
16 #include <asm/xen/hypercall.h>
17 #include <asm/system_misc.h>
18 #include <linux/interrupt.h>
19 #include <linux/irqreturn.h>
20 #include <linux/module.h>
22 #include <linux/of_irq.h>
23 #include <linux/of_address.h>
24 #include <linux/cpuidle.h>
25 #include <linux/cpufreq.h>
26 #include <linux/cpu.h>
30 struct start_info _xen_start_info;
31 struct start_info *xen_start_info = &_xen_start_info;
32 EXPORT_SYMBOL(xen_start_info);
34 enum xen_domain_type xen_domain_type = XEN_NATIVE;
35 EXPORT_SYMBOL(xen_domain_type);
37 struct shared_info xen_dummy_shared_info;
38 struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info;
40 DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
41 static struct vcpu_info __percpu *xen_vcpu_info;
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;
47 /* TODO: to be removed */
48 __read_mostly int xen_have_vector_callback;
49 EXPORT_SYMBOL_GPL(xen_have_vector_callback);
51 int xen_platform_pci_unplug = XEN_UNPLUG_ALL;
52 EXPORT_SYMBOL_GPL(xen_platform_pci_unplug);
54 static __read_mostly int xen_events_irq = -1;
56 int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
58 xen_pfn_t *mfn, int nr,
59 int *err_ptr, pgprot_t prot,
63 return xen_xlate_remap_gfn_array(vma, addr, mfn, nr, err_ptr,
66 EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_array);
68 /* Not used by XENFEAT_auto_translated guests. */
69 int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
71 xen_pfn_t mfn, int nr,
72 pgprot_t prot, unsigned domid,
77 EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);
79 int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
80 int nr, struct page **pages)
82 return xen_xlate_unmap_gfn_range(vma, nr, pages);
84 EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range);
86 static void xen_percpu_init(void)
88 struct vcpu_register_vcpu_info info;
89 struct vcpu_info *vcpup;
93 pr_info("Xen: initializing cpu%d\n", cpu);
94 vcpup = per_cpu_ptr(xen_vcpu_info, cpu);
96 info.mfn = __pa(vcpup) >> PAGE_SHIFT;
97 info.offset = offset_in_page(vcpup);
99 err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
101 per_cpu(xen_vcpu, cpu) = vcpup;
103 enable_percpu_irq(xen_events_irq, 0);
107 static void xen_restart(enum reboot_mode reboot_mode, const char *cmd)
109 struct sched_shutdown r = { .reason = SHUTDOWN_reboot };
111 rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
115 static void xen_power_off(void)
117 struct sched_shutdown r = { .reason = SHUTDOWN_poweroff };
119 rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
123 static int xen_cpu_notification(struct notifier_block *self,
124 unsigned long action,
138 static struct notifier_block xen_cpu_notifier = {
139 .notifier_call = xen_cpu_notification,
142 static irqreturn_t xen_arm_callback(int irq, void *arg)
144 xen_hvm_evtchn_do_upcall();
149 * see Documentation/devicetree/bindings/arm/xen.txt for the
150 * documentation of the Xen Device Tree format.
152 #define GRANT_TABLE_PHYSADDR 0
153 static int __init xen_guest_init(void)
155 struct xen_add_to_physmap xatp;
156 static struct shared_info *shared_info_page = 0;
157 struct device_node *node;
159 const char *s = NULL;
160 const char *version = NULL;
161 const char *xen_prefix = "xen,xen-";
163 phys_addr_t grant_frames;
165 node = of_find_compatible_node(NULL, NULL, "xen,xen");
167 pr_debug("No Xen support\n");
170 s = of_get_property(node, "compatible", &len);
171 if (strlen(xen_prefix) + 3 < len &&
172 !strncmp(xen_prefix, s, strlen(xen_prefix)))
173 version = s + strlen(xen_prefix);
174 if (version == NULL) {
175 pr_debug("Xen version not found\n");
178 if (of_address_to_resource(node, GRANT_TABLE_PHYSADDR, &res))
180 grant_frames = res.start;
181 xen_events_irq = irq_of_parse_and_map(node, 0);
182 pr_info("Xen %s support found, events_irq=%d gnttab_frame=%pa\n",
183 version, xen_events_irq, &grant_frames);
185 if (xen_events_irq < 0)
188 xen_domain_type = XEN_HVM_DOMAIN;
190 xen_setup_features();
192 if (xen_feature(XENFEAT_dom0))
193 xen_start_info->flags |= SIF_INITDOMAIN|SIF_PRIVILEGED;
195 xen_start_info->flags &= ~(SIF_INITDOMAIN|SIF_PRIVILEGED);
197 if (!shared_info_page)
198 shared_info_page = (struct shared_info *)
199 get_zeroed_page(GFP_KERNEL);
200 if (!shared_info_page) {
201 pr_err("not enough memory\n");
204 xatp.domid = DOMID_SELF;
206 xatp.space = XENMAPSPACE_shared_info;
207 xatp.gpfn = __pa(shared_info_page) >> PAGE_SHIFT;
208 if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp))
211 HYPERVISOR_shared_info = (struct shared_info *)shared_info_page;
213 /* xen_vcpu is a pointer to the vcpu_info struct in the shared_info
214 * page, we use it in the event channel upcall and in some pvclock
216 * The shared info contains exactly 1 CPU (the boot CPU). The guest
217 * is required to use VCPUOP_register_vcpu_info to place vcpu info
218 * for secondary CPUs as they are brought up.
219 * For uniformity we use VCPUOP_register_vcpu_info even on cpu0.
221 xen_vcpu_info = __alloc_percpu(sizeof(struct vcpu_info),
222 sizeof(struct vcpu_info));
223 if (xen_vcpu_info == NULL)
226 if (gnttab_setup_auto_xlat_frames(grant_frames)) {
227 free_percpu(xen_vcpu_info);
231 if (!xen_initial_domain())
235 * Making sure board specific code will not set up ops for
236 * cpu idle and cpu freq.
243 if (request_percpu_irq(xen_events_irq, xen_arm_callback,
244 "events", &xen_vcpu)) {
245 pr_err("Error request IRQ %d\n", xen_events_irq);
251 register_cpu_notifier(&xen_cpu_notifier);
255 early_initcall(xen_guest_init);
257 static int __init xen_pm_init(void)
262 pm_power_off = xen_power_off;
263 arm_pm_restart = xen_restart;
267 late_initcall(xen_pm_init);
271 void xen_arch_pre_suspend(void) { }
272 void xen_arch_post_suspend(int suspend_cancelled) { }
273 void xen_timer_resume(void) { }
274 void xen_arch_resume(void) { }
277 /* In the hypervisor.S file. */
278 EXPORT_SYMBOL_GPL(HYPERVISOR_event_channel_op);
279 EXPORT_SYMBOL_GPL(HYPERVISOR_grant_table_op);
280 EXPORT_SYMBOL_GPL(HYPERVISOR_xen_version);
281 EXPORT_SYMBOL_GPL(HYPERVISOR_console_io);
282 EXPORT_SYMBOL_GPL(HYPERVISOR_sched_op);
283 EXPORT_SYMBOL_GPL(HYPERVISOR_hvm_op);
284 EXPORT_SYMBOL_GPL(HYPERVISOR_memory_op);
285 EXPORT_SYMBOL_GPL(HYPERVISOR_physdev_op);
286 EXPORT_SYMBOL_GPL(HYPERVISOR_vcpu_op);
287 EXPORT_SYMBOL_GPL(HYPERVISOR_tmem_op);
288 EXPORT_SYMBOL_GPL(HYPERVISOR_multicall);
289 EXPORT_SYMBOL_GPL(privcmd_call);