2 * Machine specific setup for xen
4 * Jeremy Fitzhardinge <jeremy@xensource.com>, XenSource Inc, 2007
7 #include <linux/module.h>
8 #include <linux/sched.h>
14 #include <asm/setup.h>
15 #include <asm/xen/hypervisor.h>
16 #include <asm/xen/hypercall.h>
18 #include <xen/interface/physdev.h>
19 #include <xen/features.h>
23 /* These are code, but not functions. Defined in entry.S */
24 extern const char xen_hypervisor_callback[];
25 extern const char xen_failsafe_callback[];
27 unsigned long *phys_to_machine_mapping;
28 EXPORT_SYMBOL(phys_to_machine_mapping);
31 * machine_specific_memory_setup - Hook for machine specific memory setup.
34 char * __init xen_memory_setup(void)
36 unsigned long max_pfn = xen_start_info->nr_pages;
39 add_memory_region(0, PFN_PHYS(max_pfn), E820_RAM);
44 static void xen_idle(void)
51 current_thread_info()->status &= ~TS_POLLING;
52 smp_mb__after_clear_bit();
54 current_thread_info()->status |= TS_POLLING;
58 void __init xen_arch_setup(void)
60 struct physdev_set_iopl set_iopl;
63 HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
64 HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables);
66 if (!xen_feature(XENFEAT_auto_translated_physmap))
67 HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_pae_extended_cr3);
69 HYPERVISOR_set_callbacks(__KERNEL_CS, (unsigned long)xen_hypervisor_callback,
70 __KERNEL_CS, (unsigned long)xen_failsafe_callback);
73 rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
75 printk(KERN_INFO "physdev_op failed %d\n", rc);
78 if (!(xen_start_info->flags & SIF_INITDOMAIN)) {
79 printk(KERN_INFO "ACPI in unprivileged domain disabled\n");
84 memcpy(boot_command_line, xen_start_info->cmd_line,
85 MAX_GUEST_CMDLINE > COMMAND_LINE_SIZE ?
86 COMMAND_LINE_SIZE : MAX_GUEST_CMDLINE);
91 /* fill cpus_possible with all available cpus */
92 xen_fill_possible_map();
95 paravirt_disable_iospace();