Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | /* Xen-specific pieces of head.S, intended to be included in the right place in head.S */ #ifdef CONFIG_XEN #include <linux/elfnote.h> #include <linux/init.h> #include <asm/boot.h> #include <asm/asm.h> #include <asm/page_types.h> #include <xen/interface/elfnote.h> #include <xen/interface/features.h> #include <xen/interface/xen.h> #include <xen/interface/xen-mca.h> #include <asm/xen/interface.h> #ifdef CONFIG_XEN_PVH #define PVH_FEATURES_STR "|writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel" /* Note the lack of 'hvm_callback_vector'. Older hypervisor will * balk at this being part of XEN_ELFNOTE_FEATURES, so we put it in * XEN_ELFNOTE_SUPPORTED_FEATURES which older hypervisors will ignore. */ #define PVH_FEATURES ((1 << XENFEAT_writable_page_tables) | \ (1 << XENFEAT_auto_translated_physmap) | \ (1 << XENFEAT_supervisor_mode_kernel) | \ (1 << XENFEAT_hvm_callback_vector)) /* The XENFEAT_writable_page_tables is not stricly neccessary as we set that * up regardless whether this CONFIG option is enabled or not, but it * clarifies what the right flags need to be. */ #else #define PVH_FEATURES_STR "" #define PVH_FEATURES (0) #endif __INIT ENTRY(startup_xen) cld #ifdef CONFIG_X86_32 mov %esi,xen_start_info mov $init_thread_union+THREAD_SIZE,%esp #else mov %rsi,xen_start_info mov $init_thread_union+THREAD_SIZE,%rsp #endif jmp xen_start_kernel __FINIT #ifdef CONFIG_XEN_PVH /* * xen_pvh_early_cpu_init() - early PVH VCPU initialization * @cpu: this cpu number (%rdi) * @entry: true if this is a secondary vcpu coming up on this entry * point, false if this is the boot CPU being initialized for * the first time (%rsi) * * Note: This is called as a function on the boot CPU, and is the entry point * on the secondary CPU. */ ENTRY(xen_pvh_early_cpu_init) mov %rsi, %r11 /* Gather features to see if NX implemented. */ mov $0x80000001, %eax cpuid mov %edx, %esi mov $MSR_EFER, %ecx rdmsr bts $_EFER_SCE, %eax bt $20, %esi jnc 1f /* No NX, skip setting it */ bts $_EFER_NX, %eax 1: wrmsr #ifdef CONFIG_SMP cmp $0, %r11b jne cpu_bringup_and_idle #endif ret #endif /* CONFIG_XEN_PVH */ .pushsection .text .balign PAGE_SIZE ENTRY(hypercall_page) .skip PAGE_SIZE #define HYPERCALL(n) \ .equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \ .type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32 #include <asm/xen-hypercalls.h> #undef HYPERCALL .popsection ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux") ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6") ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0") #ifdef CONFIG_X86_32 ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET) #else ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map) /* Map the p2m table to a 512GB-aligned user address. */ ELFNOTE(Xen, XEN_ELFNOTE_INIT_P2M, .quad PGDIR_SIZE) #endif ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen) ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page) ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .ascii "!writable_page_tables|pae_pgdir_above_4gb"; .asciz PVH_FEATURES_STR) ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES, .long (PVH_FEATURES) | (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0)) ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes") ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic") ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .quad _PAGE_PRESENT; .quad _PAGE_PRESENT) ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1) ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN, .long 1) ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START) ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0) #endif /*CONFIG_XEN */ |