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();