Commit | Line | Data |
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5ead97c8 JF |
1 | /* |
2 | * Machine specific setup for xen | |
3 | * | |
4 | * Jeremy Fitzhardinge <jeremy@xensource.com>, XenSource Inc, 2007 | |
5 | */ | |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/sched.h> | |
9 | #include <linux/mm.h> | |
10 | #include <linux/pm.h> | |
11 | ||
12 | #include <asm/elf.h> | |
6c3652ef | 13 | #include <asm/vdso.h> |
5ead97c8 JF |
14 | #include <asm/e820.h> |
15 | #include <asm/setup.h> | |
16 | #include <asm/xen/hypervisor.h> | |
17 | #include <asm/xen/hypercall.h> | |
18 | ||
19 | #include <xen/interface/physdev.h> | |
20 | #include <xen/features.h> | |
21 | ||
22 | #include "xen-ops.h" | |
d2eea68e | 23 | #include "vdso.h" |
5ead97c8 JF |
24 | |
25 | /* These are code, but not functions. Defined in entry.S */ | |
26 | extern const char xen_hypervisor_callback[]; | |
27 | extern const char xen_failsafe_callback[]; | |
28 | ||
5ead97c8 JF |
29 | unsigned long *phys_to_machine_mapping; |
30 | EXPORT_SYMBOL(phys_to_machine_mapping); | |
31 | ||
32 | /** | |
33 | * machine_specific_memory_setup - Hook for machine specific memory setup. | |
34 | **/ | |
35 | ||
36 | char * __init xen_memory_setup(void) | |
37 | { | |
38 | unsigned long max_pfn = xen_start_info->nr_pages; | |
39 | ||
40 | e820.nr_map = 0; | |
41 | add_memory_region(0, PFN_PHYS(max_pfn), E820_RAM); | |
42 | ||
43 | return "Xen"; | |
44 | } | |
45 | ||
46 | static void xen_idle(void) | |
47 | { | |
48 | local_irq_disable(); | |
49 | ||
50 | if (need_resched()) | |
51 | local_irq_enable(); | |
52 | else { | |
53 | current_thread_info()->status &= ~TS_POLLING; | |
54 | smp_mb__after_clear_bit(); | |
55 | safe_halt(); | |
56 | current_thread_info()->status |= TS_POLLING; | |
57 | } | |
58 | } | |
59 | ||
d2eea68e RM |
60 | /* |
61 | * Set the bit indicating "nosegneg" library variants should be used. | |
62 | */ | |
63 | static void fiddle_vdso(void) | |
64 | { | |
af65d648 RM |
65 | extern const char vdso32_default_start; |
66 | u32 *mask = VDSO32_SYMBOL(&vdso32_default_start, NOTE_MASK); | |
d2eea68e RM |
67 | *mask |= 1 << VDSO_NOTE_NONEGSEG_BIT; |
68 | } | |
69 | ||
5ead97c8 JF |
70 | void __init xen_arch_setup(void) |
71 | { | |
72 | struct physdev_set_iopl set_iopl; | |
73 | int rc; | |
74 | ||
75 | HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments); | |
76 | HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables); | |
77 | ||
78 | if (!xen_feature(XENFEAT_auto_translated_physmap)) | |
79 | HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_pae_extended_cr3); | |
80 | ||
81 | HYPERVISOR_set_callbacks(__KERNEL_CS, (unsigned long)xen_hypervisor_callback, | |
82 | __KERNEL_CS, (unsigned long)xen_failsafe_callback); | |
83 | ||
84 | set_iopl.iopl = 1; | |
85 | rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl); | |
86 | if (rc != 0) | |
87 | printk(KERN_INFO "physdev_op failed %d\n", rc); | |
88 | ||
89 | #ifdef CONFIG_ACPI | |
90 | if (!(xen_start_info->flags & SIF_INITDOMAIN)) { | |
91 | printk(KERN_INFO "ACPI in unprivileged domain disabled\n"); | |
92 | disable_acpi(); | |
93 | } | |
94 | #endif | |
95 | ||
96 | memcpy(boot_command_line, xen_start_info->cmd_line, | |
97 | MAX_GUEST_CMDLINE > COMMAND_LINE_SIZE ? | |
98 | COMMAND_LINE_SIZE : MAX_GUEST_CMDLINE); | |
99 | ||
100 | pm_idle = xen_idle; | |
f87e4cac JF |
101 | |
102 | #ifdef CONFIG_SMP | |
103 | /* fill cpus_possible with all available cpus */ | |
104 | xen_fill_possible_map(); | |
105 | #endif | |
dfdcdd42 JF |
106 | |
107 | paravirt_disable_iospace(); | |
d2eea68e RM |
108 | |
109 | fiddle_vdso(); | |
5ead97c8 | 110 | } |