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5ead97c8 JF |
1 | /* Xen-specific pieces of head.S, intended to be included in the right |
2 | place in head.S */ | |
3 | ||
4 | #ifdef CONFIG_XEN | |
5 | ||
6 | #include <linux/elfnote.h> | |
08b6d290 | 7 | #include <linux/init.h> |
7077c33d | 8 | |
5ead97c8 | 9 | #include <asm/boot.h> |
7077c33d | 10 | #include <asm/asm.h> |
0341c14d | 11 | #include <asm/page_types.h> |
7077c33d | 12 | |
5ead97c8 | 13 | #include <xen/interface/elfnote.h> |
4e903a20 | 14 | #include <xen/interface/features.h> |
7e0edc1b | 15 | #include <asm/xen/interface.h> |
5ead97c8 | 16 | |
4e903a20 MR |
17 | #ifdef CONFIG_XEN_PVH |
18 | #define PVH_FEATURES_STR "|writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel" | |
19 | /* Note the lack of 'hvm_callback_vector'. Older hypervisor will | |
20 | * balk at this being part of XEN_ELFNOTE_FEATURES, so we put it in | |
21 | * XEN_ELFNOTE_SUPPORTED_FEATURES which older hypervisors will ignore. | |
22 | */ | |
23 | #define PVH_FEATURES ((1 << XENFEAT_writable_page_tables) | \ | |
24 | (1 << XENFEAT_auto_translated_physmap) | \ | |
25 | (1 << XENFEAT_supervisor_mode_kernel) | \ | |
26 | (1 << XENFEAT_hvm_callback_vector)) | |
27 | /* The XENFEAT_writable_page_tables is not stricly neccessary as we set that | |
28 | * up regardless whether this CONFIG option is enabled or not, but it | |
29 | * clarifies what the right flags need to be. | |
30 | */ | |
31 | #else | |
32 | #define PVH_FEATURES_STR "" | |
33 | #define PVH_FEATURES (0) | |
34 | #endif | |
35 | ||
08b6d290 | 36 | __INIT |
5ead97c8 | 37 | ENTRY(startup_xen) |
5ead97c8 | 38 | cld |
8c5e5ac3 JF |
39 | #ifdef CONFIG_X86_32 |
40 | mov %esi,xen_start_info | |
41 | mov $init_thread_union+THREAD_SIZE,%esp | |
63d9c273 MT |
42 | #ifdef CONFIG_SMP |
43 | movl $cpu_gdt_table,%edi | |
44 | movl $__per_cpu_load,%eax | |
45 | movw %ax,__KERNEL_PERCPU + 2(%edi) | |
46 | rorl $16,%eax | |
47 | movb %al,__KERNEL_PERCPU + 4(%edi) | |
48 | movb %ah,__KERNEL_PERCPU + 7(%edi) | |
49 | movl $__per_cpu_end - 1,%eax | |
50 | subl $__per_cpu_start,%eax | |
51 | movw %ax,__KERNEL_PERCPU + 0(%edi) | |
52 | #endif | |
8c5e5ac3 JF |
53 | #else |
54 | mov %rsi,xen_start_info | |
55 | mov $init_thread_union+THREAD_SIZE,%rsp | |
56 | #endif | |
5ead97c8 | 57 | jmp xen_start_kernel |
08b6d290 SR |
58 | |
59 | __FINIT | |
5ead97c8 | 60 | |
a2ef5dc2 MR |
61 | #ifdef CONFIG_XEN_PVH |
62 | /* | |
63 | * xen_pvh_early_cpu_init() - early PVH VCPU initialization | |
64 | * @cpu: this cpu number (%rdi) | |
65 | * @entry: true if this is a secondary vcpu coming up on this entry | |
66 | * point, false if this is the boot CPU being initialized for | |
67 | * the first time (%rsi) | |
68 | * | |
69 | * Note: This is called as a function on the boot CPU, and is the entry point | |
70 | * on the secondary CPU. | |
71 | */ | |
72 | ENTRY(xen_pvh_early_cpu_init) | |
73 | mov %rsi, %r11 | |
74 | ||
75 | /* Gather features to see if NX implemented. */ | |
76 | mov $0x80000001, %eax | |
77 | cpuid | |
78 | mov %edx, %esi | |
79 | ||
80 | mov $MSR_EFER, %ecx | |
81 | rdmsr | |
82 | bts $_EFER_SCE, %eax | |
83 | ||
84 | bt $20, %esi | |
85 | jnc 1f /* No NX, skip setting it */ | |
86 | bts $_EFER_NX, %eax | |
87 | 1: wrmsr | |
88 | #ifdef CONFIG_SMP | |
89 | cmp $0, %r11b | |
90 | jne cpu_bringup_and_idle | |
91 | #endif | |
92 | ret | |
93 | ||
94 | #endif /* CONFIG_XEN_PVH */ | |
95 | ||
a987b16c | 96 | .pushsection .text |
7d0642b9 | 97 | .balign PAGE_SIZE |
5ead97c8 | 98 | ENTRY(hypercall_page) |
7d0642b9 KRW |
99 | #define NEXT_HYPERCALL(x) \ |
100 | ENTRY(xen_hypercall_##x) \ | |
101 | .skip 32 | |
102 | ||
103 | NEXT_HYPERCALL(set_trap_table) | |
104 | NEXT_HYPERCALL(mmu_update) | |
105 | NEXT_HYPERCALL(set_gdt) | |
106 | NEXT_HYPERCALL(stack_switch) | |
107 | NEXT_HYPERCALL(set_callbacks) | |
108 | NEXT_HYPERCALL(fpu_taskswitch) | |
109 | NEXT_HYPERCALL(sched_op_compat) | |
110 | NEXT_HYPERCALL(platform_op) | |
111 | NEXT_HYPERCALL(set_debugreg) | |
112 | NEXT_HYPERCALL(get_debugreg) | |
113 | NEXT_HYPERCALL(update_descriptor) | |
114 | NEXT_HYPERCALL(ni) | |
115 | NEXT_HYPERCALL(memory_op) | |
116 | NEXT_HYPERCALL(multicall) | |
117 | NEXT_HYPERCALL(update_va_mapping) | |
118 | NEXT_HYPERCALL(set_timer_op) | |
119 | NEXT_HYPERCALL(event_channel_op_compat) | |
120 | NEXT_HYPERCALL(xen_version) | |
121 | NEXT_HYPERCALL(console_io) | |
122 | NEXT_HYPERCALL(physdev_op_compat) | |
123 | NEXT_HYPERCALL(grant_table_op) | |
124 | NEXT_HYPERCALL(vm_assist) | |
125 | NEXT_HYPERCALL(update_va_mapping_otherdomain) | |
126 | NEXT_HYPERCALL(iret) | |
127 | NEXT_HYPERCALL(vcpu_op) | |
128 | NEXT_HYPERCALL(set_segment_base) | |
129 | NEXT_HYPERCALL(mmuext_op) | |
130 | NEXT_HYPERCALL(xsm_op) | |
131 | NEXT_HYPERCALL(nmi_op) | |
132 | NEXT_HYPERCALL(sched_op) | |
133 | NEXT_HYPERCALL(callback_op) | |
134 | NEXT_HYPERCALL(xenoprof_op) | |
135 | NEXT_HYPERCALL(event_channel_op) | |
136 | NEXT_HYPERCALL(physdev_op) | |
137 | NEXT_HYPERCALL(hvm_op) | |
138 | NEXT_HYPERCALL(sysctl) | |
139 | NEXT_HYPERCALL(domctl) | |
140 | NEXT_HYPERCALL(kexec_op) | |
141 | NEXT_HYPERCALL(tmem_op) /* 38 */ | |
142 | ENTRY(xen_hypercall_rsvr) | |
143 | .skip 320 | |
144 | NEXT_HYPERCALL(mca) /* 48 */ | |
145 | NEXT_HYPERCALL(arch_1) | |
146 | NEXT_HYPERCALL(arch_2) | |
147 | NEXT_HYPERCALL(arch_3) | |
148 | NEXT_HYPERCALL(arch_4) | |
149 | NEXT_HYPERCALL(arch_5) | |
150 | NEXT_HYPERCALL(arch_6) | |
151 | .balign PAGE_SIZE | |
5ead97c8 JF |
152 | .popsection |
153 | ||
154 | ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux") | |
155 | ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6") | |
156 | ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0") | |
8c5e5ac3 | 157 | #ifdef CONFIG_X86_32 |
7077c33d | 158 | ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET) |
8c5e5ac3 JF |
159 | #else |
160 | ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map) | |
161 | #endif | |
7077c33d JF |
162 | ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen) |
163 | ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page) | |
4e903a20 MR |
164 | ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .ascii "!writable_page_tables|pae_pgdir_above_4gb"; .asciz PVH_FEATURES_STR) |
165 | ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES, .long (PVH_FEATURES) | | |
166 | (1 << XENFEAT_writable_page_tables) | | |
167 | (1 << XENFEAT_dom0)) | |
5ead97c8 | 168 | ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes") |
5ead97c8 | 169 | ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic") |
7e0edc1b JF |
170 | ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, |
171 | .quad _PAGE_PRESENT; .quad _PAGE_PRESENT) | |
172 | ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1) | |
d1e9abd6 | 173 | ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN, .long 1) |
7077c33d | 174 | ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START) |
8c5e5ac3 | 175 | ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0) |
5ead97c8 JF |
176 | |
177 | #endif /*CONFIG_XEN */ |