xen-vtx-unstable

annotate xen/arch/x86/x86_64/traps.c @ 5289:cd10a0139388

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bitkeeper revision 1.1644.1.1 (429f749dKFzVUg9NXDMVu4apHJvpNQ)

The last annoying rename:
struct exec_domain *ed -> struct vcpu *v
Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Thu Jun 02 21:05:33 2005 +0000 (2005-06-02)
parents c62ee1a8ba98
children e9a3f213817d
rev   line source
kaf24@3602 1
kaf24@3602 2 #include <xen/config.h>
kaf24@3602 3 #include <xen/init.h>
kaf24@3602 4 #include <xen/sched.h>
kaf24@3602 5 #include <xen/lib.h>
kaf24@3602 6 #include <xen/errno.h>
kaf24@3602 7 #include <xen/mm.h>
kaf24@3602 8 #include <xen/irq.h>
kaf24@3630 9 #include <xen/console.h>
kaf24@3650 10 #include <xen/sched.h>
kaf24@5159 11 #include <asm/flushtlb.h>
kaf24@3650 12 #include <asm/msr.h>
kaf24@3602 13
kaf24@4683 14 void show_registers(struct cpu_user_regs *regs)
kaf24@3602 15 {
kaf24@4949 16 printk("CPU: %d\nEIP: %04x:[<%016lx>] \nEFLAGS: %016lx\n",
kaf24@3602 17 smp_processor_id(), 0xffff & regs->cs, regs->rip, regs->eflags);
kaf24@4654 18 printk("rax: %016lx rbx: %016lx rcx: %016lx rdx: %016lx\n",
kaf24@3602 19 regs->rax, regs->rbx, regs->rcx, regs->rdx);
kaf24@4654 20 printk("rsi: %016lx rdi: %016lx rbp: %016lx rsp: %016lx\n",
kaf24@3621 21 regs->rsi, regs->rdi, regs->rbp, regs->rsp);
kaf24@4654 22 printk("r8: %016lx r9: %016lx r10: %016lx r11: %016lx\n",
kaf24@3602 23 regs->r8, regs->r9, regs->r10, regs->r11);
kaf24@4654 24 printk("r12: %016lx r13: %016lx r14: %016lx r15: %016lx\n",
kaf24@3602 25 regs->r12, regs->r13, regs->r14, regs->r15);
kaf24@3602 26
kaf24@4923 27 if ( GUEST_MODE(regs) )
kaf24@4923 28 show_guest_stack();
kaf24@5073 29 else
kaf24@5073 30 show_stack((unsigned long *)regs->rsp);
kaf24@5073 31 }
kaf24@3602 32
kaf24@3630 33 void show_page_walk(unsigned long addr)
kaf24@3630 34 {
kaf24@3630 35 unsigned long page = read_cr3();
kaf24@3630 36
kaf24@4654 37 printk("Pagetable walk from %016lx:\n", addr);
kaf24@3630 38
kaf24@3630 39 page &= PAGE_MASK;
kaf24@3630 40 page = ((unsigned long *) __va(page))[l4_table_offset(addr)];
kaf24@4654 41 printk(" L4 = %016lx\n", page);
kaf24@3630 42 if ( !(page & _PAGE_PRESENT) )
kaf24@3630 43 return;
kaf24@3630 44
kaf24@3630 45 page &= PAGE_MASK;
kaf24@3630 46 page = ((unsigned long *) __va(page))[l3_table_offset(addr)];
kaf24@4654 47 printk(" L3 = %016lx\n", page);
kaf24@3630 48 if ( !(page & _PAGE_PRESENT) )
kaf24@3630 49 return;
kaf24@3630 50
kaf24@3630 51 page &= PAGE_MASK;
kaf24@3630 52 page = ((unsigned long *) __va(page))[l2_table_offset(addr)];
kaf24@4654 53 printk(" L2 = %016lx %s\n", page, (page & _PAGE_PSE) ? "(2MB)" : "");
kaf24@3630 54 if ( !(page & _PAGE_PRESENT) || (page & _PAGE_PSE) )
kaf24@3630 55 return;
kaf24@3630 56
kaf24@3630 57 page &= PAGE_MASK;
kaf24@3630 58 page = ((unsigned long *) __va(page))[l1_table_offset(addr)];
kaf24@4654 59 printk(" L1 = %016lx\n", page);
kaf24@3630 60 }
kaf24@3630 61
kaf24@3630 62 asmlinkage void double_fault(void);
kaf24@4683 63 asmlinkage void do_double_fault(struct cpu_user_regs *regs)
kaf24@3630 64 {
kaf24@4926 65 watchdog_disable();
kaf24@3630 66
kaf24@3686 67 console_force_unlock();
kaf24@3686 68
kaf24@3630 69 /* Find information saved during fault and dump it to the console. */
kaf24@3630 70 printk("************************************\n");
kaf24@3695 71 show_registers(regs);
kaf24@3630 72 printk("************************************\n");
kaf24@3695 73 printk("CPU%d DOUBLE FAULT -- system shutdown\n", smp_processor_id());
kaf24@3630 74 printk("System needs manual reset.\n");
kaf24@3630 75 printk("************************************\n");
kaf24@3630 76
kaf24@3630 77 /* Lock up the console to prevent spurious output from other CPUs. */
kaf24@3630 78 console_force_lock();
kaf24@3630 79
kaf24@3630 80 /* Wait for manual reset. */
kaf24@3630 81 for ( ; ; )
kaf24@3630 82 __asm__ __volatile__ ( "hlt" );
kaf24@3630 83 }
kaf24@3630 84
kaf24@3761 85 asmlinkage void syscall_enter(void);
kaf24@3650 86 void __init percpu_traps_init(void)
kaf24@3650 87 {
kaf24@3761 88 char *stack_bottom, *stack;
kaf24@3761 89 int cpu = smp_processor_id();
kaf24@3761 90
kaf24@3774 91 if ( cpu == 0 )
kaf24@3774 92 {
kaf24@3774 93 /* Specify dedicated interrupt stacks for NMIs and double faults. */
kaf24@3774 94 set_intr_gate(TRAP_double_fault, &double_fault);
kaf24@3774 95 idt_table[TRAP_double_fault].a |= 1UL << 32; /* IST1 */
kaf24@3774 96 idt_table[TRAP_nmi].a |= 2UL << 32; /* IST2 */
kaf24@3774 97 }
kaf24@3774 98
kaf24@3761 99 stack_bottom = (char *)get_stack_bottom();
kaf24@3761 100 stack = (char *)((unsigned long)stack_bottom & ~(STACK_SIZE - 1));
kaf24@3695 101
kaf24@3695 102 /* Double-fault handler has its own per-CPU 1kB stack. */
kaf24@3695 103 init_tss[cpu].ist[0] = (unsigned long)&stack[1024];
kaf24@3695 104
kaf24@3695 105 /* NMI handler has its own per-CPU 1kB stack. */
kaf24@3695 106 init_tss[cpu].ist[1] = (unsigned long)&stack[2048];
kaf24@3695 107
kaf24@3695 108 /*
kaf24@3695 109 * Trampoline for SYSCALL entry from long mode.
kaf24@3695 110 */
kaf24@3695 111
kaf24@3695 112 /* Skip the NMI and DF stacks. */
kaf24@3695 113 stack = &stack[2048];
kaf24@3695 114 wrmsr(MSR_LSTAR, (unsigned long)stack, ((unsigned long)stack>>32));
kaf24@3650 115
kaf24@3650 116 /* movq %rsp, saversp(%rip) */
kaf24@3650 117 stack[0] = 0x48;
kaf24@3650 118 stack[1] = 0x89;
kaf24@3650 119 stack[2] = 0x25;
kaf24@3761 120 *(u32 *)&stack[3] = (stack_bottom - &stack[7]) - 16;
kaf24@3650 121
kaf24@3650 122 /* leaq saversp(%rip), %rsp */
kaf24@3650 123 stack[7] = 0x48;
kaf24@3650 124 stack[8] = 0x8d;
kaf24@3650 125 stack[9] = 0x25;
kaf24@3761 126 *(u32 *)&stack[10] = (stack_bottom - &stack[14]) - 16;
kaf24@3650 127
kaf24@3783 128 /* pushq %r11 */
kaf24@3783 129 stack[14] = 0x41;
kaf24@3783 130 stack[15] = 0x53;
kaf24@3783 131
kaf24@3783 132 /* pushq $__GUEST_CS64 */
kaf24@3783 133 stack[16] = 0x68;
kaf24@3783 134 *(u32 *)&stack[17] = __GUEST_CS64;
kaf24@3783 135
kaf24@3761 136 /* jmp syscall_enter */
kaf24@3783 137 stack[21] = 0xe9;
kaf24@3783 138 *(u32 *)&stack[22] = (char *)syscall_enter - &stack[26];
kaf24@3650 139
kaf24@3695 140 /*
kaf24@3695 141 * Trampoline for SYSCALL entry from compatibility mode.
kaf24@3695 142 */
kaf24@3695 143
kaf24@3695 144 /* Skip the long-mode entry trampoline. */
kaf24@3783 145 stack = &stack[26];
kaf24@3695 146 wrmsr(MSR_CSTAR, (unsigned long)stack, ((unsigned long)stack>>32));
kaf24@3695 147
kaf24@3695 148 /* movq %rsp, saversp(%rip) */
kaf24@3695 149 stack[0] = 0x48;
kaf24@3695 150 stack[1] = 0x89;
kaf24@3695 151 stack[2] = 0x25;
kaf24@3761 152 *(u32 *)&stack[3] = (stack_bottom - &stack[7]) - 16;
kaf24@3695 153
kaf24@3695 154 /* leaq saversp(%rip), %rsp */
kaf24@3695 155 stack[7] = 0x48;
kaf24@3695 156 stack[8] = 0x8d;
kaf24@3695 157 stack[9] = 0x25;
kaf24@3761 158 *(u32 *)&stack[10] = (stack_bottom - &stack[14]) - 16;
kaf24@3695 159
kaf24@3783 160 /* pushq %r11 */
kaf24@3783 161 stack[14] = 0x41;
kaf24@3783 162 stack[15] = 0x53;
kaf24@3783 163
kaf24@3783 164 /* pushq $__GUEST_CS32 */
kaf24@3783 165 stack[16] = 0x68;
kaf24@3783 166 *(u32 *)&stack[17] = __GUEST_CS32;
kaf24@3783 167
kaf24@3761 168 /* jmp syscall_enter */
kaf24@3783 169 stack[21] = 0xe9;
kaf24@3783 170 *(u32 *)&stack[22] = (char *)syscall_enter - &stack[26];
kaf24@3695 171
kaf24@3695 172 /*
kaf24@3695 173 * Common SYSCALL parameters.
kaf24@3695 174 */
kaf24@3695 175
kaf24@3696 176 wrmsr(MSR_STAR, 0, (FLAT_RING3_CS32<<16) | __HYPERVISOR_CS);
kaf24@3822 177 wrmsr(MSR_SYSCALL_MASK, EF_VM|EF_RF|EF_NT|EF_DF|EF_IE|EF_TF, 0U);
kaf24@3650 178 }
kaf24@3650 179
kaf24@3780 180 long do_set_callbacks(unsigned long event_address,
kaf24@3780 181 unsigned long failsafe_address,
kaf24@3780 182 unsigned long syscall_address)
kaf24@3780 183 {
kaf24@5289 184 struct vcpu *d = current;
kaf24@3780 185
kaf24@4689 186 d->arch.guest_context.event_callback_eip = event_address;
kaf24@4689 187 d->arch.guest_context.failsafe_callback_eip = failsafe_address;
kaf24@4689 188 d->arch.guest_context.syscall_callback_eip = syscall_address;
kaf24@3780 189
kaf24@3780 190 return 0;
kaf24@3780 191 }