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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
5ead97c8 JF |
2 | /* Xen-specific pieces of head.S, intended to be included in the right |
3 | place in head.S */ | |
4 | ||
5 | #ifdef CONFIG_XEN | |
6 | ||
7 | #include <linux/elfnote.h> | |
08b6d290 | 8 | #include <linux/init.h> |
7077c33d | 9 | |
5ead97c8 | 10 | #include <asm/boot.h> |
7077c33d | 11 | #include <asm/asm.h> |
0341c14d | 12 | #include <asm/page_types.h> |
7077c33d | 13 | |
5ead97c8 | 14 | #include <xen/interface/elfnote.h> |
4e903a20 | 15 | #include <xen/interface/features.h> |
526abeae JG |
16 | #include <xen/interface/xen.h> |
17 | #include <xen/interface/xen-mca.h> | |
7e0edc1b | 18 | #include <asm/xen/interface.h> |
5ead97c8 | 19 | |
c504b2f1 | 20 | #ifdef CONFIG_XEN_PV |
08b6d290 | 21 | __INIT |
5ead97c8 | 22 | ENTRY(startup_xen) |
5ead97c8 | 23 | cld |
04b6b4a5 BO |
24 | |
25 | /* Clear .bss */ | |
26 | xor %eax,%eax | |
27 | mov $__bss_start, %_ASM_DI | |
28 | mov $__bss_stop, %_ASM_CX | |
29 | sub %_ASM_DI, %_ASM_CX | |
30 | shr $__ASM_SEL(2, 3), %_ASM_CX | |
31 | rep __ASM_SIZE(stos) | |
32 | ||
4478c407 BO |
33 | mov %_ASM_SI, xen_start_info |
34 | mov $init_thread_union+THREAD_SIZE, %_ASM_SP | |
35 | ||
5ead97c8 | 36 | jmp xen_start_kernel |
08b6d290 SR |
37 | |
38 | __FINIT | |
c504b2f1 | 39 | #endif |
5ead97c8 | 40 | |
a987b16c | 41 | .pushsection .text |
7d0642b9 | 42 | .balign PAGE_SIZE |
5ead97c8 | 43 | ENTRY(hypercall_page) |
526abeae JG |
44 | .skip PAGE_SIZE |
45 | ||
46 | #define HYPERCALL(n) \ | |
47 | .equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \ | |
48 | .type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32 | |
49 | #include <asm/xen-hypercalls.h> | |
50 | #undef HYPERCALL | |
51 | ||
5ead97c8 JF |
52 | .popsection |
53 | ||
54 | ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux") | |
55 | ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6") | |
56 | ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0") | |
8c5e5ac3 | 57 | #ifdef CONFIG_X86_32 |
7077c33d | 58 | ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET) |
8c5e5ac3 JF |
59 | #else |
60 | ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map) | |
8f5b0c63 | 61 | /* Map the p2m table to a 512GB-aligned user address. */ |
daaa42f0 | 62 | ELFNOTE(Xen, XEN_ELFNOTE_INIT_P2M, .quad (PUD_SIZE * PTRS_PER_PUD)) |
8c5e5ac3 | 63 | #endif |
c504b2f1 | 64 | #ifdef CONFIG_XEN_PV |
7077c33d | 65 | ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen) |
c504b2f1 | 66 | #endif |
7077c33d | 67 | ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page) |
063334f3 BO |
68 | ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, |
69 | .ascii "!writable_page_tables|pae_pgdir_above_4gb") | |
70 | ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES, | |
71 | .long (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0)) | |
5ead97c8 | 72 | ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes") |
5ead97c8 | 73 | ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic") |
7e0edc1b JF |
74 | ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, |
75 | .quad _PAGE_PRESENT; .quad _PAGE_PRESENT) | |
76 | ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1) | |
d1e9abd6 | 77 | ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN, .long 1) |
7077c33d | 78 | ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START) |
8c5e5ac3 | 79 | ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0) |
5ead97c8 JF |
80 | |
81 | #endif /*CONFIG_XEN */ |