| /* 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 <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) |
| #define NEXT_HYPERCALL(x) \ |
| ENTRY(xen_hypercall_##x) \ |
| .skip 32 |
| |
| NEXT_HYPERCALL(set_trap_table) |
| NEXT_HYPERCALL(mmu_update) |
| NEXT_HYPERCALL(set_gdt) |
| NEXT_HYPERCALL(stack_switch) |
| NEXT_HYPERCALL(set_callbacks) |
| NEXT_HYPERCALL(fpu_taskswitch) |
| NEXT_HYPERCALL(sched_op_compat) |
| NEXT_HYPERCALL(platform_op) |
| NEXT_HYPERCALL(set_debugreg) |
| NEXT_HYPERCALL(get_debugreg) |
| NEXT_HYPERCALL(update_descriptor) |
| NEXT_HYPERCALL(ni) |
| NEXT_HYPERCALL(memory_op) |
| NEXT_HYPERCALL(multicall) |
| NEXT_HYPERCALL(update_va_mapping) |
| NEXT_HYPERCALL(set_timer_op) |
| NEXT_HYPERCALL(event_channel_op_compat) |
| NEXT_HYPERCALL(xen_version) |
| NEXT_HYPERCALL(console_io) |
| NEXT_HYPERCALL(physdev_op_compat) |
| NEXT_HYPERCALL(grant_table_op) |
| NEXT_HYPERCALL(vm_assist) |
| NEXT_HYPERCALL(update_va_mapping_otherdomain) |
| NEXT_HYPERCALL(iret) |
| NEXT_HYPERCALL(vcpu_op) |
| NEXT_HYPERCALL(set_segment_base) |
| NEXT_HYPERCALL(mmuext_op) |
| NEXT_HYPERCALL(xsm_op) |
| NEXT_HYPERCALL(nmi_op) |
| NEXT_HYPERCALL(sched_op) |
| NEXT_HYPERCALL(callback_op) |
| NEXT_HYPERCALL(xenoprof_op) |
| NEXT_HYPERCALL(event_channel_op) |
| NEXT_HYPERCALL(physdev_op) |
| NEXT_HYPERCALL(hvm_op) |
| NEXT_HYPERCALL(sysctl) |
| NEXT_HYPERCALL(domctl) |
| NEXT_HYPERCALL(kexec_op) |
| NEXT_HYPERCALL(tmem_op) /* 38 */ |
| ENTRY(xen_hypercall_rsvr) |
| .skip 320 |
| NEXT_HYPERCALL(mca) /* 48 */ |
| NEXT_HYPERCALL(arch_1) |
| NEXT_HYPERCALL(arch_2) |
| NEXT_HYPERCALL(arch_3) |
| NEXT_HYPERCALL(arch_4) |
| NEXT_HYPERCALL(arch_5) |
| NEXT_HYPERCALL(arch_6) |
| .balign PAGE_SIZE |
| .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) |
| #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 */ |
