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> | |
| 13 | #include <asm/e820.h> | |
| 14 | #include <asm/setup.h> | |
| 15 | #include <asm/xen/hypervisor.h> | |
| 16 | #include <asm/xen/hypercall.h> | |
| 17 | ||
| 18 | #include <xen/interface/physdev.h> | |
| 19 | #include <xen/features.h> | |
| 20 | ||
| 21 | #include "xen-ops.h" | |
| 22 | ||
| 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[]; | |
| 26 | ||
| 27 | static __initdata struct shared_info init_shared; | |
| 28 | ||
| 29 | /* | |
| 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. | |
| 32 | */ | |
| 33 | struct shared_info *HYPERVISOR_shared_info = &init_shared; | |
| 34 | ||
| 35 | unsigned long *phys_to_machine_mapping; | |
| 36 | EXPORT_SYMBOL(phys_to_machine_mapping); | |
| 37 | ||
| 38 | /** | |
| 39 | * machine_specific_memory_setup - Hook for machine specific memory setup. | |
| 40 | **/ | |
| 41 | ||
| 42 | char * __init xen_memory_setup(void) | |
| 43 | { | |
| 44 | unsigned long max_pfn = xen_start_info->nr_pages; | |
| 45 | ||
| 46 | e820.nr_map = 0; | |
| 47 | add_memory_region(0, PFN_PHYS(max_pfn), E820_RAM); | |
| 48 | ||
| 49 | return "Xen"; | |
| 50 | } | |
| 51 | ||
| 52 | static void xen_idle(void) | |
| 53 | { | |
| 54 | local_irq_disable(); | |
| 55 | ||
| 56 | if (need_resched()) | |
| 57 | local_irq_enable(); | |
| 58 | else { | |
| 59 | current_thread_info()->status &= ~TS_POLLING; | |
| 60 | smp_mb__after_clear_bit(); | |
| 61 | safe_halt(); | |
| 62 | current_thread_info()->status |= TS_POLLING; | |
| 63 | } | |
| 64 | } | |
| 65 | ||
| 66 | void __init xen_arch_setup(void) | |
| 67 | { | |
| 68 | struct physdev_set_iopl set_iopl; | |
| 69 | int rc; | |
| 70 | ||
| 71 | HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments); | |
| 72 | HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables); | |
| 73 | ||
| 74 | if (!xen_feature(XENFEAT_auto_translated_physmap)) | |
| 75 | HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_pae_extended_cr3); | |
| 76 | ||
| 77 | HYPERVISOR_set_callbacks(__KERNEL_CS, (unsigned long)xen_hypervisor_callback, | |
| 78 | __KERNEL_CS, (unsigned long)xen_failsafe_callback); | |
| 79 | ||
| 80 | set_iopl.iopl = 1; | |
| 81 | rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl); | |
| 82 | if (rc != 0) | |
| 83 | printk(KERN_INFO "physdev_op failed %d\n", rc); | |
| 84 | ||
| 85 | #ifdef CONFIG_ACPI | |
| 86 | if (!(xen_start_info->flags & SIF_INITDOMAIN)) { | |
| 87 | printk(KERN_INFO "ACPI in unprivileged domain disabled\n"); | |
| 88 | disable_acpi(); | |
| 89 | } | |
| 90 | #endif | |
| 91 | ||
| 92 | memcpy(boot_command_line, xen_start_info->cmd_line, | |
| 93 | MAX_GUEST_CMDLINE > COMMAND_LINE_SIZE ? | |
| 94 | COMMAND_LINE_SIZE : MAX_GUEST_CMDLINE); | |
| 95 | ||
| 96 | pm_idle = xen_idle; | |
| 97 | } |