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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / 7e20cfb50496c0549d11eab521feb5bc565c63a6 / . / arch / x86 / xen / xen-head.S
blob: 72a8e6adebe6c09da07303bafac194236f2df7c6 [file] [log] [blame]
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]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>
Sam Ravnborg08b6d292008-01-30 13:33:25 +0100[diff] [blame]7#include <linux/init.h>
Jeremy Fitzhardinge7077c332008-07-08 15:06:35 -0700[diff] [blame]8
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]9#include <asm/boot.h>
Jeremy Fitzhardinge7077c332008-07-08 15:06:35 -0700[diff] [blame]10#include <asm/asm.h>
Jeremy Fitzhardinge0341c142009-02-13 11:14:01 -0800[diff] [blame]11#include <asm/page_types.h>
Jeremy Fitzhardinge7077c332008-07-08 15:06:35 -0700[diff] [blame]12
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]13#include <xen/interface/elfnote.h>
Mukesh Rathor4e903a22013-12-31 11:16:25 -0500[diff] [blame]14#include <xen/interface/features.h>
Juergen Gross526abea2015-01-21 08:49:25 +0100[diff] [blame]15#include <xen/interface/xen.h>
16#include <xen/interface/xen-mca.h>
Jeremy Fitzhardinge7e0edc12008-05-31 01:33:04 +0100[diff] [blame]17#include <asm/xen/interface.h>
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]18
Vitaly Kuznetsovc504b2f2017-03-14 18:35:51 +0100[diff] [blame]19#ifdef CONFIG_XEN_PV
Sam Ravnborg08b6d292008-01-30 13:33:25 +0100[diff] [blame]20 __INIT
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]21ENTRY(startup_xen)
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]22 cld
Boris Ostrovsky04b6b4a2016-02-26 14:02:36 -0500[diff] [blame]23
24 /* Clear .bss */
25 xor %eax,%eax
26 mov $__bss_start, %_ASM_DI
27 mov $__bss_stop, %_ASM_CX
28 sub %_ASM_DI, %_ASM_CX
29 shr $__ASM_SEL(2, 3), %_ASM_CX
30 rep __ASM_SIZE(stos)
31
Boris Ostrovsky4478c402016-02-26 14:02:37 -0500[diff] [blame]32 mov %_ASM_SI, xen_start_info
33 mov $init_thread_union+THREAD_SIZE, %_ASM_SP
34
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]35 jmp xen_start_kernel
Sam Ravnborg08b6d292008-01-30 13:33:25 +0100[diff] [blame]36
37 __FINIT
Vitaly Kuznetsovc504b2f2017-03-14 18:35:51 +0100[diff] [blame]38#endif
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]39
Jeremy Fitzhardingea987b162008-06-16 15:01:56 -0700[diff] [blame]40.pushsection .text
Konrad Rzeszutek Wilk7d0642b2012-07-11 15:03:18 -0400[diff] [blame]41 .balign PAGE_SIZE
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]42ENTRY(hypercall_page)
Juergen Gross526abea2015-01-21 08:49:25 +0100[diff] [blame]43 .skip PAGE_SIZE
Konrad Rzeszutek Wilk7d0642b2012-07-11 15:03:18 -0400[diff] [blame]44
Juergen Gross526abea2015-01-21 08:49:25 +0100[diff] [blame]45#define HYPERCALL(n) \
46 .equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \
47 .type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32
48#include <asm/xen-hypercalls.h>
49#undef HYPERCALL
50
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]51.popsection
52
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]53 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux")
54 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6")
55 ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0")
Jeremy Fitzhardinge8c5e5ac2008-07-08 15:06:44 -0700[diff] [blame]56#ifdef CONFIG_X86_32
Jeremy Fitzhardinge7077c332008-07-08 15:06:35 -0700[diff] [blame]57 ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET)
Jeremy Fitzhardinge8c5e5ac2008-07-08 15:06:44 -0700[diff] [blame]58#else
59 ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map)
Juergen Gross8f5b0c62015-07-17 06:51:25 +0200[diff] [blame]60 /* Map the p2m table to a 512GB-aligned user address. */
61 ELFNOTE(Xen, XEN_ELFNOTE_INIT_P2M, .quad PGDIR_SIZE)
Jeremy Fitzhardinge8c5e5ac2008-07-08 15:06:44 -0700[diff] [blame]62#endif
Vitaly Kuznetsovc504b2f2017-03-14 18:35:51 +0100[diff] [blame]63#ifdef CONFIG_XEN_PV
Jeremy Fitzhardinge7077c332008-07-08 15:06:35 -0700[diff] [blame]64 ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen)
Vitaly Kuznetsovc504b2f2017-03-14 18:35:51 +0100[diff] [blame]65#endif
Jeremy Fitzhardinge7077c332008-07-08 15:06:35 -0700[diff] [blame]66 ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page)
Boris Ostrovsky063334f2017-02-03 16:57:22 -0500[diff] [blame]67 ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,
68 .ascii "!writable_page_tables|pae_pgdir_above_4gb")
69 ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES,
70 .long (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0))
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]71 ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes")
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]72 ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic")
Jeremy Fitzhardinge7e0edc12008-05-31 01:33:04 +0100[diff] [blame]73 ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
74 .quad _PAGE_PRESENT; .quad _PAGE_PRESENT)
75 ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
Juergen Grossd1e9abd2014-09-17 06:12:36 +0200[diff] [blame]76 ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN, .long 1)
Jeremy Fitzhardinge7077c332008-07-08 15:06:35 -0700[diff] [blame]77 ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START)
Jeremy Fitzhardinge8c5e5ac2008-07-08 15:06:44 -0700[diff] [blame]78 ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0)
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -0700[diff] [blame]79
80#endif /*CONFIG_XEN */