projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | { | |
| d2eea68e | 65 | extern char vsyscall_int80_start; |
| 6c3652ef | 66 | u32 *mask = VDSO32_SYMBOL(&vsyscall_int80_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 | } |