3 #include "kvm/cpufeature.h"
4 #include "kvm/interrupt.h"
5 #include "kvm/boot-protocol.h"
10 #include <asm/bootparam.h>
12 #include <sys/ioctl.h>
29 * Compatibility code. Remove this when we move to tools/kvm.
31 #ifndef KVM_EXIT_INTERNAL_ERROR
32 # define KVM_EXIT_INTERNAL_ERROR 17
35 #define DEFINE_KVM_EXIT_REASON(reason) [reason] = #reason
37 const char *kvm_exit_reasons[] = {
38 DEFINE_KVM_EXIT_REASON(KVM_EXIT_UNKNOWN),
39 DEFINE_KVM_EXIT_REASON(KVM_EXIT_EXCEPTION),
40 DEFINE_KVM_EXIT_REASON(KVM_EXIT_IO),
41 DEFINE_KVM_EXIT_REASON(KVM_EXIT_HYPERCALL),
42 DEFINE_KVM_EXIT_REASON(KVM_EXIT_DEBUG),
43 DEFINE_KVM_EXIT_REASON(KVM_EXIT_HLT),
44 DEFINE_KVM_EXIT_REASON(KVM_EXIT_MMIO),
45 DEFINE_KVM_EXIT_REASON(KVM_EXIT_IRQ_WINDOW_OPEN),
46 DEFINE_KVM_EXIT_REASON(KVM_EXIT_SHUTDOWN),
47 DEFINE_KVM_EXIT_REASON(KVM_EXIT_FAIL_ENTRY),
48 DEFINE_KVM_EXIT_REASON(KVM_EXIT_INTR),
49 DEFINE_KVM_EXIT_REASON(KVM_EXIT_SET_TPR),
50 DEFINE_KVM_EXIT_REASON(KVM_EXIT_TPR_ACCESS),
51 DEFINE_KVM_EXIT_REASON(KVM_EXIT_S390_SIEIC),
52 DEFINE_KVM_EXIT_REASON(KVM_EXIT_S390_RESET),
53 DEFINE_KVM_EXIT_REASON(KVM_EXIT_DCR),
54 DEFINE_KVM_EXIT_REASON(KVM_EXIT_NMI),
55 DEFINE_KVM_EXIT_REASON(KVM_EXIT_INTERNAL_ERROR),
58 #define DEFINE_KVM_EXT(ext) \
66 { DEFINE_KVM_EXT(KVM_CAP_COALESCED_MMIO) },
67 { DEFINE_KVM_EXT(KVM_CAP_SET_TSS_ADDR) },
68 { DEFINE_KVM_EXT(KVM_CAP_PIT2) },
69 { DEFINE_KVM_EXT(KVM_CAP_USER_MEMORY) },
70 { DEFINE_KVM_EXT(KVM_CAP_IRQ_ROUTING) },
71 { DEFINE_KVM_EXT(KVM_CAP_IRQCHIP) },
72 { DEFINE_KVM_EXT(KVM_CAP_HLT) },
73 { DEFINE_KVM_EXT(KVM_CAP_IRQ_INJECT_STATUS) },
74 { DEFINE_KVM_EXT(KVM_CAP_EXT_CPUID) },
77 static bool kvm__supports_extension(struct kvm *self, unsigned int extension)
81 ret = ioctl(self->sys_fd, KVM_CHECK_EXTENSION, extension);
88 static int kvm__check_extensions(struct kvm *self)
92 for (i = 0; i < ARRAY_SIZE(kvm_req_ext); i++) {
93 if (!kvm__supports_extension(self, kvm_req_ext[i].code)) {
94 error("Unsuppored KVM extension detected: %s",
103 static struct kvm *kvm__new(void)
105 struct kvm *self = calloc(1, sizeof *self);
108 die("out of memory");
113 void kvm__delete(struct kvm *self)
115 free(self->ram_start);
119 static bool kvm__cpu_supports_vm(void)
121 struct cpuid_regs regs;
125 regs = (struct cpuid_regs) {
131 case CPUID_VENDOR_INTEL_1:
133 feature = KVM__X86_FEATURE_VMX;
136 case CPUID_VENDOR_AMD_1:
137 eax_base = 0x80000000;
138 feature = KVM__X86_FEATURE_SVM;
145 regs = (struct cpuid_regs) {
150 if (regs.eax < eax_base + 0x01)
153 regs = (struct cpuid_regs) {
154 .eax = eax_base + 0x01
158 return regs.ecx & (1 << feature);
161 struct kvm *kvm__init(const char *kvm_dev, unsigned long ram_size)
163 struct kvm_userspace_memory_region mem;
164 struct kvm_pit_config pit_config = { .flags = 0, };
170 if (!kvm__cpu_supports_vm())
171 die("Your CPU does not support hardware virtualization");
175 self->sys_fd = open(kvm_dev, O_RDWR);
176 if (self->sys_fd < 0) {
178 die("'%s' not found. Please make sure your kernel has CONFIG_KVM enabled and that the KVM modules are loaded.", kvm_dev);
183 ret = ioctl(self->sys_fd, KVM_GET_API_VERSION, 0);
184 if (ret != KVM_API_VERSION)
185 die_perror("KVM_API_VERSION ioctl");
187 self->vm_fd = ioctl(self->sys_fd, KVM_CREATE_VM, 0);
189 die_perror("KVM_CREATE_VM ioctl");
191 if (kvm__check_extensions(self))
192 die("A required KVM extention is not supported by OS");
194 ret = ioctl(self->vm_fd, KVM_SET_TSS_ADDR, 0xfffbd000);
196 die_perror("KVM_SET_TSS_ADDR ioctl");
198 ret = ioctl(self->vm_fd, KVM_CREATE_PIT2, &pit_config);
200 die_perror("KVM_CREATE_PIT2 ioctl");
202 self->ram_size = ram_size;
204 page_size = sysconf(_SC_PAGESIZE);
205 if (posix_memalign(&self->ram_start, page_size, self->ram_size) != 0)
206 die("out of memory");
208 mem = (struct kvm_userspace_memory_region) {
210 .guest_phys_addr = 0x0UL,
211 .memory_size = self->ram_size,
212 .userspace_addr = (unsigned long) self->ram_start,
215 ret = ioctl(self->vm_fd, KVM_SET_USER_MEMORY_REGION, &mem);
217 die_perror("KVM_SET_USER_MEMORY_REGION ioctl");
219 ret = ioctl(self->vm_fd, KVM_CREATE_IRQCHIP);
221 die_perror("KVM_CREATE_IRQCHIP ioctl");
223 self->vcpu_fd = ioctl(self->vm_fd, KVM_CREATE_VCPU, 0);
224 if (self->vcpu_fd < 0)
225 die_perror("KVM_CREATE_VCPU ioctl");
227 mmap_size = ioctl(self->sys_fd, KVM_GET_VCPU_MMAP_SIZE, 0);
229 die_perror("KVM_GET_VCPU_MMAP_SIZE ioctl");
231 self->kvm_run = mmap(NULL, mmap_size, PROT_READ|PROT_WRITE, MAP_SHARED, self->vcpu_fd, 0);
232 if (self->kvm_run == MAP_FAILED)
233 die("unable to mmap vcpu fd");
238 void kvm__enable_singlestep(struct kvm *self)
240 struct kvm_guest_debug debug = {
241 .control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP,
244 if (ioctl(self->vcpu_fd, KVM_SET_GUEST_DEBUG, &debug) < 0)
245 warning("KVM_SET_GUEST_DEBUG failed");
248 #define BOOT_LOADER_SELECTOR 0x1000
249 #define BOOT_LOADER_IP 0x0000
250 #define BOOT_LOADER_SP 0x8000
251 #define BOOT_CMDLINE_OFFSET 0x20000
253 #define BOOT_PROTOCOL_REQUIRED 0x206
254 #define LOAD_HIGH 0x01
256 static int load_flat_binary(struct kvm *self, int fd)
261 if (lseek(fd, 0, SEEK_SET) < 0)
264 p = guest_real_to_host(self, BOOT_LOADER_SELECTOR, BOOT_LOADER_IP);
266 while ((nr = read(fd, p, 65536)) > 0)
269 self->boot_selector = BOOT_LOADER_SELECTOR;
270 self->boot_ip = BOOT_LOADER_IP;
271 self->boot_sp = BOOT_LOADER_SP;
276 static const char *BZIMAGE_MAGIC = "HdrS";
278 static bool load_bzimage(struct kvm *self, int fd_kernel,
279 int fd_initrd, const char *kernel_cmdline)
281 struct boot_params *kern_boot;
282 unsigned long setup_sects;
283 struct boot_params boot;
290 * See Documentation/x86/boot.txt for details no bzImage on-disk and
294 if (lseek(fd_kernel, 0, SEEK_SET) < 0)
297 if (read(fd_kernel, &boot, sizeof(boot)) != sizeof(boot))
300 if (memcmp(&boot.hdr.header, BZIMAGE_MAGIC, strlen(BZIMAGE_MAGIC)))
303 if (boot.hdr.version < BOOT_PROTOCOL_REQUIRED) {
304 die("Too old kernel");
307 if (lseek(fd_kernel, 0, SEEK_SET) < 0)
310 if (!boot.hdr.setup_sects)
311 boot.hdr.setup_sects = BZ_DEFAULT_SETUP_SECTS;
312 setup_sects = boot.hdr.setup_sects + 1;
314 setup_size = setup_sects << 9;
315 p = guest_real_to_host(self, BOOT_LOADER_SELECTOR, BOOT_LOADER_IP);
317 /* copy setup.bin to mem*/
318 if (read(fd_kernel, p, setup_size) != setup_size)
321 /* copy vmlinux.bin to BZ_KERNEL_START*/
322 p = guest_flat_to_host(self, BZ_KERNEL_START);
324 while ((nr = read(fd_kernel, p, 65536)) > 0)
327 p = guest_flat_to_host(self, BOOT_CMDLINE_OFFSET);
328 if (kernel_cmdline) {
329 cmdline_size = strlen(kernel_cmdline) + 1;
330 if (cmdline_size > boot.hdr.cmdline_size)
331 cmdline_size = boot.hdr.cmdline_size;
333 memset(p, 0, boot.hdr.cmdline_size);
334 memcpy(p, kernel_cmdline, cmdline_size - 1);
337 kern_boot = guest_real_to_host(self, BOOT_LOADER_SELECTOR, 0x00);
339 kern_boot->hdr.cmd_line_ptr = BOOT_CMDLINE_OFFSET;
340 kern_boot->hdr.type_of_loader = 0xff;
341 kern_boot->hdr.heap_end_ptr = 0xfe00;
342 kern_boot->hdr.loadflags |= CAN_USE_HEAP;
345 * Read initrd image into guest memory
347 if (fd_initrd >= 0) {
348 struct stat initrd_stat;
351 if (fstat(fd_initrd, &initrd_stat))
354 addr = boot.hdr.initrd_addr_max & ~0xfffff;
356 if (addr < BZ_KERNEL_START)
357 die("Not enough memory for initrd");
358 else if (addr < (self->ram_size - initrd_stat.st_size))
363 p = guest_flat_to_host(self, addr);
364 nr = read(fd_initrd, p, initrd_stat.st_size);
365 if (nr != initrd_stat.st_size)
366 die("Failed to read initrd");
368 kern_boot->hdr.ramdisk_image = addr;
369 kern_boot->hdr.ramdisk_size = initrd_stat.st_size;
372 self->boot_selector = BOOT_LOADER_SELECTOR;
374 * The real-mode setup code starts at offset 0x200 of a bzImage. See
375 * Documentation/x86/boot.txt for details.
377 self->boot_ip = BOOT_LOADER_IP + 0x200;
378 self->boot_sp = BOOT_LOADER_SP;
383 bool kvm__load_kernel(struct kvm *kvm, const char *kernel_filename,
384 const char *initrd_filename, const char *kernel_cmdline)
387 int fd_kernel = -1, fd_initrd = -1;
389 fd_kernel = open(kernel_filename, O_RDONLY);
391 die("Unable to open kernel %s", kernel_filename);
393 if (initrd_filename) {
394 fd_initrd = open(initrd_filename, O_RDONLY);
396 die("Unable to open initrd %s", initrd_filename);
399 ret = load_bzimage(kvm, fd_kernel, fd_initrd, kernel_cmdline);
407 warning("%s is not a bzImage. Trying to load it as a flat binary...", kernel_filename);
409 ret = load_flat_binary(kvm, fd_kernel);
413 die("%s is not a valid bzImage or flat binary", kernel_filename);
419 static inline uint64_t ip_flat_to_real(struct kvm *self, uint64_t ip)
421 uint64_t cs = self->sregs.cs.selector;
423 return ip - (cs << 4);
426 static inline bool is_in_protected_mode(struct kvm *self)
428 return self->sregs.cr0 & 0x01;
431 static inline uint64_t ip_to_flat(struct kvm *self, uint64_t ip)
436 * NOTE! We should take code segment base address into account here.
437 * Luckily it's usually zero because Linux uses flat memory model.
439 if (is_in_protected_mode(self))
442 cs = self->sregs.cs.selector;
444 return ip + (cs << 4);
447 static inline uint32_t selector_to_base(uint16_t selector)
450 * KVM on Intel requires 'base' to be 'selector * 16' in real mode.
452 return (uint32_t)selector * 16;
455 static struct kvm_msrs *kvm_msrs__new(size_t nmsrs)
457 struct kvm_msrs *self = calloc(1, sizeof(*self) + (sizeof(struct kvm_msr_entry) * nmsrs));
460 die("out of memory");
465 #define MSR_IA32_TIME_STAMP_COUNTER 0x10
467 #define MSR_IA32_SYSENTER_CS 0x174
468 #define MSR_IA32_SYSENTER_ESP 0x175
469 #define MSR_IA32_SYSENTER_EIP 0x176
471 #define MSR_IA32_STAR 0xc0000081
472 #define MSR_IA32_LSTAR 0xc0000082
473 #define MSR_IA32_CSTAR 0xc0000083
474 #define MSR_IA32_FMASK 0xc0000084
475 #define MSR_IA32_KERNEL_GS_BASE 0xc0000102
477 #define KVM_MSR_ENTRY(_index, _data) \
478 (struct kvm_msr_entry) { .index = _index, .data = _data }
480 static void kvm__setup_msrs(struct kvm *self)
482 unsigned long ndx = 0;
484 self->msrs = kvm_msrs__new(100);
486 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_SYSENTER_CS, 0x0);
487 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_SYSENTER_ESP, 0x0);
488 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_SYSENTER_EIP, 0x0);
490 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_STAR, 0x0);
491 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_CSTAR, 0x0);
492 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_KERNEL_GS_BASE, 0x0);
493 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_FMASK, 0x0);
494 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_LSTAR, 0x0);
496 self->msrs->entries[ndx++] = KVM_MSR_ENTRY(MSR_IA32_TIME_STAMP_COUNTER, 0x0);
498 self->msrs->nmsrs = ndx;
500 if (ioctl(self->vcpu_fd, KVM_SET_MSRS, self->msrs) < 0)
501 die_perror("KVM_SET_MSRS failed");
504 static void kvm__setup_fpu(struct kvm *self)
506 self->fpu = (struct kvm_fpu) {
511 if (ioctl(self->vcpu_fd, KVM_SET_FPU, &self->fpu) < 0)
512 die_perror("KVM_SET_FPU failed");
515 static void kvm__setup_regs(struct kvm *self)
517 self->regs = (struct kvm_regs) {
518 /* We start the guest in 16-bit real mode */
519 .rflags = 0x0000000000000002ULL,
521 .rip = self->boot_ip,
522 .rsp = self->boot_sp,
523 .rbp = self->boot_sp,
526 if (self->regs.rip > USHRT_MAX)
527 die("ip 0x%" PRIx64 " is too high for real mode", (uint64_t) self->regs.rip);
529 if (ioctl(self->vcpu_fd, KVM_SET_REGS, &self->regs) < 0)
530 die_perror("KVM_SET_REGS failed");
533 static void kvm__setup_sregs(struct kvm *self)
536 if (ioctl(self->vcpu_fd, KVM_GET_SREGS, &self->sregs) < 0)
537 die_perror("KVM_GET_SREGS failed");
539 self->sregs.cs.selector = self->boot_selector;
540 self->sregs.cs.base = selector_to_base(self->boot_selector);
541 self->sregs.ss.selector = self->boot_selector;
542 self->sregs.ss.base = selector_to_base(self->boot_selector);
543 self->sregs.ds.selector = self->boot_selector;
544 self->sregs.ds.base = selector_to_base(self->boot_selector);
545 self->sregs.es.selector = self->boot_selector;
546 self->sregs.es.base = selector_to_base(self->boot_selector);
547 self->sregs.fs.selector = self->boot_selector;
548 self->sregs.fs.base = selector_to_base(self->boot_selector);
549 self->sregs.gs.selector = self->boot_selector;
550 self->sregs.gs.base = selector_to_base(self->boot_selector);
552 if (ioctl(self->vcpu_fd, KVM_SET_SREGS, &self->sregs) < 0)
553 die_perror("KVM_SET_SREGS failed");
557 * kvm__reset_vcpu - reset virtual CPU to a known state
559 void kvm__reset_vcpu(struct kvm *self)
561 kvm__setup_sregs(self);
562 kvm__setup_regs(self);
563 kvm__setup_fpu(self);
564 kvm__setup_msrs(self);
568 * kvm__setup_bios - inject BIOS into guest system memory
569 * @self - guest system descriptor
571 * This function is a main routine where we poke guest memory
572 * and install BIOS there.
574 void kvm__setup_bios(struct kvm *self)
576 /* standart minimal configuration */
579 /* FIXME: SMP, ACPI and friends here */
582 #define TIMER_INTERVAL_NS 1000000 /* 1 msec */
584 static void alarm_handler(int sig)
589 * This function sets up a timer that's used to inject interrupts from the
590 * userspace hypervisor into the guest at periodical intervals. Please note
591 * that clock interrupt, for example, is not handled here.
593 void kvm__start_timer(struct kvm *self)
595 struct itimerspec its;
599 sigfillset(&sa.sa_mask);
601 sa.sa_handler = alarm_handler;
603 sigaction(SIGALRM, &sa, NULL);
605 memset(&sev, 0, sizeof(struct sigevent));
606 sev.sigev_value.sival_int = 0;
607 sev.sigev_notify = SIGEV_SIGNAL;
608 sev.sigev_signo = SIGALRM;
610 if (timer_create(CLOCK_REALTIME, &sev, &self->timerid) < 0)
611 die("timer_create()");
613 its.it_value.tv_sec = TIMER_INTERVAL_NS / 1000000000;
614 its.it_value.tv_nsec = TIMER_INTERVAL_NS % 1000000000;
615 its.it_interval.tv_sec = its.it_value.tv_sec;
616 its.it_interval.tv_nsec = its.it_value.tv_nsec;
618 if (timer_settime(self->timerid, 0, &its, NULL) < 0)
619 die("timer_settime()");
622 void kvm__run(struct kvm *self)
626 err = ioctl(self->vcpu_fd, KVM_RUN, 0);
627 if (err && (errno != EINTR && errno != EAGAIN))
628 die_perror("KVM_RUN failed");
631 void kvm__irq_line(struct kvm *self, int irq, int level)
633 struct kvm_irq_level irq_level;
635 irq_level = (struct kvm_irq_level) {
642 if (ioctl(self->vm_fd, KVM_IRQ_LINE, &irq_level) < 0)
643 die_perror("KVM_IRQ_LINE failed");
646 static void print_dtable(const char *name, struct kvm_dtable *dtable)
648 printf(" %s %016" PRIx64 " %08" PRIx16 "\n",
649 name, (uint64_t) dtable->base, (uint16_t) dtable->limit);
652 static void print_segment(const char *name, struct kvm_segment *seg)
654 printf(" %s %04" PRIx16 " %016" PRIx64 " %08" PRIx32 " %02" PRIx8 " %x %x %x %x %x %x %x\n",
655 name, (uint16_t) seg->selector, (uint64_t) seg->base, (uint32_t) seg->limit,
656 (uint8_t) seg->type, seg->present, seg->dpl, seg->db, seg->s, seg->l, seg->g, seg->avl);
659 void kvm__show_registers(struct kvm *self)
661 unsigned long cr0, cr2, cr3;
662 unsigned long cr4, cr8;
663 unsigned long rax, rbx, rcx;
664 unsigned long rdx, rsi, rdi;
665 unsigned long rbp, r8, r9;
666 unsigned long r10, r11, r12;
667 unsigned long r13, r14, r15;
668 unsigned long rip, rsp;
669 struct kvm_sregs sregs;
670 unsigned long rflags;
671 struct kvm_regs regs;
674 if (ioctl(self->vcpu_fd, KVM_GET_REGS, ®s) < 0)
675 die("KVM_GET_REGS failed");
677 rflags = regs.rflags;
679 rip = regs.rip; rsp = regs.rsp;
680 rax = regs.rax; rbx = regs.rbx; rcx = regs.rcx;
681 rdx = regs.rdx; rsi = regs.rsi; rdi = regs.rdi;
682 rbp = regs.rbp; r8 = regs.r8; r9 = regs.r9;
683 r10 = regs.r10; r11 = regs.r11; r12 = regs.r12;
684 r13 = regs.r13; r14 = regs.r14; r15 = regs.r15;
686 printf("Registers:\n");
687 printf(" rip: %016lx rsp: %016lx flags: %016lx\n", rip, rsp, rflags);
688 printf(" rax: %016lx rbx: %016lx rcx: %016lx\n", rax, rbx, rcx);
689 printf(" rdx: %016lx rsi: %016lx rdi: %016lx\n", rdx, rsi, rdi);
690 printf(" rbp: %016lx r8: %016lx r9: %016lx\n", rbp, r8, r9);
691 printf(" r10: %016lx r11: %016lx r12: %016lx\n", r10, r11, r12);
692 printf(" r13: %016lx r14: %016lx r15: %016lx\n", r13, r14, r15);
694 if (ioctl(self->vcpu_fd, KVM_GET_SREGS, &sregs) < 0)
695 die("KVM_GET_REGS failed");
697 cr0 = sregs.cr0; cr2 = sregs.cr2; cr3 = sregs.cr3;
698 cr4 = sregs.cr4; cr8 = sregs.cr8;
700 printf(" cr0: %016lx cr2: %016lx cr3: %016lx\n", cr0, cr2, cr3);
701 printf(" cr4: %016lx cr8: %016lx\n", cr4, cr8);
702 printf("Segment registers:\n");
703 printf(" register selector base limit type p dpl db s l g avl\n");
704 print_segment("cs ", &sregs.cs);
705 print_segment("ss ", &sregs.ss);
706 print_segment("ds ", &sregs.ds);
707 print_segment("es ", &sregs.es);
708 print_segment("fs ", &sregs.fs);
709 print_segment("gs ", &sregs.gs);
710 print_segment("tr ", &sregs.tr);
711 print_segment("ldt", &sregs.ldt);
712 print_dtable("gdt", &sregs.gdt);
713 print_dtable("idt", &sregs.idt);
714 printf(" [ efer: %016" PRIx64 " apic base: %016" PRIx64 " nmi: %s ]\n",
715 (uint64_t) sregs.efer, (uint64_t) sregs.apic_base,
716 (self->nmi_disabled ? "disabled" : "enabled"));
717 printf("Interrupt bitmap:\n");
719 for (i = 0; i < (KVM_NR_INTERRUPTS + 63) / 64; i++)
720 printf("%016" PRIx64 " ", (uint64_t) sregs.interrupt_bitmap[i]);
724 void kvm__show_code(struct kvm *self)
726 unsigned int code_bytes = 64;
727 unsigned int code_prologue = code_bytes * 43 / 64;
728 unsigned int code_len = code_bytes;
733 if (ioctl(self->vcpu_fd, KVM_GET_REGS, &self->regs) < 0)
734 die("KVM_GET_REGS failed");
736 if (ioctl(self->vcpu_fd, KVM_GET_SREGS, &self->sregs) < 0)
737 die("KVM_GET_SREGS failed");
739 ip = guest_flat_to_host(self, ip_to_flat(self, self->regs.rip) - code_prologue);
743 for (i = 0; i < code_len; i++, ip++) {
744 if (!host_ptr_in_ram(self, ip))
749 if (ip == guest_flat_to_host(self, ip_to_flat(self, self->regs.rip)))
750 printf("<%02x> ", c);
758 kvm__dump_mem(self, self->regs.rsp, 32);
761 void kvm__show_page_tables(struct kvm *self)
768 if (!is_in_protected_mode(self))
771 if (ioctl(self->vcpu_fd, KVM_GET_SREGS, &self->sregs) < 0)
772 die("KVM_GET_SREGS failed");
774 pte4 = guest_flat_to_host(self, self->sregs.cr3);
775 if (!host_ptr_in_ram(self, pte4))
778 pte3 = guest_flat_to_host(self, (*pte4 & ~0xfff));
779 if (!host_ptr_in_ram(self, pte3))
782 pte2 = guest_flat_to_host(self, (*pte3 & ~0xfff));
783 if (!host_ptr_in_ram(self, pte2))
786 pte1 = guest_flat_to_host(self, (*pte2 & ~0xfff));
787 if (!host_ptr_in_ram(self, pte1))
790 printf("Page Tables:\n");
791 if (*pte2 & (1 << 7))
792 printf(" pte4: %016" PRIx64 " pte3: %016" PRIx64
793 " pte2: %016" PRIx64 "\n",
794 *pte4, *pte3, *pte2);
796 printf(" pte4: %016" PRIx64 " pte3: %016" PRIx64 " pte2: %016"
797 PRIx64 " pte1: %016" PRIx64 "\n",
798 *pte4, *pte3, *pte2, *pte1);
801 void kvm__dump_mem(struct kvm *self, unsigned long addr, unsigned long size)
806 size &= ~7; /* mod 8 */
810 p = guest_flat_to_host(self, addr);
812 for (n = 0; n < size; n+=8) {
813 if (!host_ptr_in_ram(self, p + n))
816 printf(" 0x%08lx: %02x %02x %02x %02x %02x %02x %02x %02x\n",
817 addr + n, p[n + 0], p[n + 1], p[n + 2], p[n + 3],
818 p[n + 4], p[n + 5], p[n + 6], p[n + 7]);