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 static __initdata
struct shared_info init_shared
;
30 * Point at some empty memory to start with. We map the real shared_info
31 * page as soon as fixmap is up and running.
33 struct shared_info
*HYPERVISOR_shared_info
= &init_shared
;
35 unsigned long *phys_to_machine_mapping
;
36 EXPORT_SYMBOL(phys_to_machine_mapping
);
39 * machine_specific_memory_setup - Hook for machine specific memory setup.
42 char * __init
xen_memory_setup(void)
44 unsigned long max_pfn
= xen_start_info
->nr_pages
;
47 add_memory_region(0, PFN_PHYS(max_pfn
), E820_RAM
);
52 static void xen_idle(void)
59 current_thread_info()->status
&= ~TS_POLLING
;
60 smp_mb__after_clear_bit();
62 current_thread_info()->status
|= TS_POLLING
;
66 void __init
xen_arch_setup(void)
68 struct physdev_set_iopl set_iopl
;
71 HYPERVISOR_vm_assist(VMASST_CMD_enable
, VMASST_TYPE_4gb_segments
);
72 HYPERVISOR_vm_assist(VMASST_CMD_enable
, VMASST_TYPE_writable_pagetables
);
74 if (!xen_feature(XENFEAT_auto_translated_physmap
))
75 HYPERVISOR_vm_assist(VMASST_CMD_enable
, VMASST_TYPE_pae_extended_cr3
);
77 HYPERVISOR_set_callbacks(__KERNEL_CS
, (unsigned long)xen_hypervisor_callback
,
78 __KERNEL_CS
, (unsigned long)xen_failsafe_callback
);
81 rc
= HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl
, &set_iopl
);
83 printk(KERN_INFO
"physdev_op failed %d\n", rc
);
86 if (!(xen_start_info
->flags
& SIF_INITDOMAIN
)) {
87 printk(KERN_INFO
"ACPI in unprivileged domain disabled\n");
92 memcpy(boot_command_line
, xen_start_info
->cmd_line
,
93 MAX_GUEST_CMDLINE
> COMMAND_LINE_SIZE
?
94 COMMAND_LINE_SIZE
: MAX_GUEST_CMDLINE
);
99 /* fill cpus_possible with all available cpus */
100 xen_fill_possible_map();