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![static void ioport_write(int index, uint32_t address, uint32_t data)
{
static IOPortWriteFunc *default_func[3] = {
default_ioport_writeb,
default_ioport_writew,
default_ioport_writel
};
IOPortWriteFunc *func = ioport_write_table[index][address];
if (!func)
func = default_func[index];
func(ioport_opaque[address], address, data);
}
ioport_write_table
2009 8 30](https://image.slidesharecdn.com/reading-kvm-2nd-090829122759-phpapp01/75/KVM-122-2048.jpg)
Uploaded byTsuyoshi OZAWA
第二回KVM読書会
The document discusses KVM (Kernel-based Virtual Machine) and Intel VT-x virtualization technologies. It covers CPU rings, virtual machine monitors (VMMs) like Xen and VMware, Intel VT-x features like VMX root/non-root mode, VMCS, VMREAD/VMWRITE, and how KVM on Linux utilizes these features to enable full virtualization on Intel processors.
第二回KVM読書会
- 1. KVM Tsuyoshi Ozawa @ Univ. of Tsukuba Twitter oza_x86 2009 8 30
- 2. 1. Intel-VT 2. KVM ( 2) 2009 8 30
- 3. Intel-VT 2009 8 30
- 4. 2009 8 30
- 5. Intel-VT 1. 2.VM CPU x86 2009 8 30
- 6. x86 ( ) Ring3 = User Mode Ring2 Ring1 (0 ) Ring0 OS Ring 0 Kernel Mode Ring3 OS 2009 8 30
- 7. 1. 2. 2009 8 30
- 8. Ring3 Ring0 Ring3 Ring2 Ring1 Ring0 Kernel Mode User Mode 2009 8 30
- 9. Ring3 Ring0 Ring3 Ring2 out Ring1 Ring0 Kernel Mode User Mode 2009 8 30
- 10. Ring3 Ring0 Ring3 Ring2 out Ring1 Ring0 Kernel Mode ( ) User Mode 2009 8 30
- 11. Ring3 Ring0 Ring3 = User Mode Ring2 out Ring1 Ring0 Kernel Mode 2009 8 30
- 12. VM CPU etc... 2009 8 30
- 13. VM Kernel Kernel Mode Mode CPU 2009 8 30
- 14. ? 2009 8 30
- 15. Xen VMWare Ring3 Ring2 Ring1 = Guest Kerel Ring0 HyperVisor OS 2009 8 30
- 16. Xen VMWare Ring 1 Ring 2 Ring 1 Kernel Kernel Mode Mode Hypervirsor on Guest kernel on CPU 2009 8 30
- 17. Intel-VT 2009 8 30
- 18. Intel-VT Kernel Kernel Mode Mode Hypervirsor on Guest kernel on CPU 2009 8 30
- 19. Intel-VT Guest OS Kernel Kernel Mode Mode Hypervirsor on Guest kernel on CPU 2009 8 30
- 20. Intel-VT CPU . Kernel Kernel Mode Mode Hypervirsor on Guest kernel on CPU 2009 8 30
- 21. Intel-VT VMX Root Mode Kernel Kernel Mode Mode Hypervirsor on Guest kernel on CPU 2009 8 30
- 22. VMX Root Mode VMXON Kernel . Mode A20 VT Hypervirsor on 2009 8 30
- 23. VMX Root Mode VMXOFF Kernel Mode VT . VT Hypervirsor on 2009 8 30
- 24. Intel-VT VMX non Root Mode Kernel Kernel Mode Mode Hypervirsor on Guest kernel on CPU 2009 8 30
- 25. Intel-VT VMX non Root Mode Kernel Kernel Mode Mode VMEntry Hypervirsor on Guest kernel on CPU 2009 8 30
- 26. VMEntry VMLAUNCH VMRESUME VMX non Root Mode 2009 8 30
- 27. Intel-VT VMExit Kernel Kernel Mode Mode Hypervirsor on Guest kernel on CPU 2009 8 30
- 28. VMExit VMMCALL + VMX non Root Mode 2009 8 30
- 29. • . RDTSC ( ) • VMCS 2009 8 30
- 30. VMCS Kernel Mode Memory VMCS Hypervirsor on 2009 8 30
- 31. VMCS Virtual Machine Control Structure 4KB 2009 8 30
- 32. VMCS •Virtual Machine Control Structure •4KB • VM etc... 2009 8 30
- 33. VMCS VMPTRST Current VMCS 2009 8 30
- 34. VMPTRST Kernel Mode Memory VMCS VMCS Hypervirsor on 2009 8 30
- 35. Current VMCS VMPTRLD Current VMCS 2009 8 30
- 36. VMPTRST Kernel Mode Memory VMCS Current VMCS Hypervirsor on 2009 8 30
- 37. VMCLEAR VMCS 2009 8 30
- 38. VMCLEAR Kernel Mode Memory VMCS Hypervirsor on 2009 8 30
- 39. VMCS VMREAD/VMWRITE 2009 8 30
- 40. VMWRITE Kernel Mode Memory VMCS Hypervirsor on 2009 8 30
- 41. VMREAD Kernel Mode Memory VMCS Hypervirsor on 2009 8 30
- 42. Intel ( ) 2009 8 30
- 43. KVM 2009 8 30
- 44. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 45. 2009 8 30
- 46. VMX VMX NonRoot Root Mode Mode 2009 8 30
- 47. 2009 8 30
- 48. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 49. VMX non RootMode 2009 8 30
- 50. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 51. User Qemu KVM Program Qemu Linux Guest KVM Kernel Kernel 2009 8 30
- 52. ./qemu -hda disk1.img (-hda ) 2009 8 30
- 53. User Qemu Program $ ./qemu -hda disk1 Linux Guest KVM Kernel Kernel 2009 8 30
- 54. User Qemu Program Qemu Linux Guest KVM Kernel Kernel 2009 8 30
- 55. Qemu 2009 8 30
- 56. User Qemu Program IOCTL Linux Guest KVM Kernel Kernel 2009 8 30
- 57. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 58. 2009 8 30
- 59. User Qemu Program Linux Guest KVM VT Kernel Kernel 2009 8 30
- 60. VMX non RootMode 2009 8 30
- 61. vmlaunch vmresume 2009 8 30
- 62. User Qemu Program vmlaunch / vmresume Linux Guest KVM Kernel Kernel 2009 8 30
- 63. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 64. VMX non rootMode 2009 8 30
- 65. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 66. 2009 8 30
- 67. VMX non RootMode IO 2009 8 30
- 68. 2009 8 30
- 69. outb %ax 2009 8 30
- 70. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 71. User Qemu Program Linux Guest KVM Kernel Kernel outb %ax 2009 8 30
- 72. VMX Root Mode 2009 8 30
- 73. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 74. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 75. 2009 8 30
- 76. Qemu 2009 8 30
- 77. User Qemu Program IOCTL return Linux Guest KVM Kernel Kernel 2009 8 30
- 78. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 79. User Qemu Program io Linux Guest KVM Kernel Kernel 2009 8 30
- 80. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 81. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 82. 2009 8 30
- 83. IOCTL CPU 2009 8 30
- 84. User Qemu Program IOCTL Linux Guest KVM Kernel Kernel 2009 8 30
- 85. 2009 8 30
- 86. ... 2009 8 30
- 87. User Qemu Program IOCTL Linux Guest KVM Kernel Kernel vmlaunch vmresume 2009 8 30
- 88. 2009 8 30
- 89. 2009 8 30
- 90. outb %ax 2009 8 30
- 91. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 92. User Qemu Program Linux Guest KVM Kernel Kernel outb %ax 2009 8 30
- 93. VMX non RootMode IO 2009 8 30
- 94. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 95. User Qemu Program Linux Guest KVM Kernel Kernel outb %ax 2009 8 30
- 96. 2009 8 30
- 97. "jne .Llaunched nt" __ex(ASM_VMX_VMLAUNCH) "nt" "jmp .Lkvm_vmx_return nt" ".Llaunched: " __ex(ASM_VMX_VMRESUME) "nt" ".Lkvm_vmx_return: " vmlaunch /* */ vmresume ... ... 2009 8 30
- 98. "jne .Llaunched nt" __ex(ASM_VMX_VMLAUNCH) "nt" "jmp .Lkvm_vmx_return nt" ".Llaunched: " __ex(ASM_VMX_VMRESUME) "nt" ".Lkvm_vmx_return: " /* */ ... 2009 8 30
- 99. 2009 8 30
- 100. 2009 8 30
- 101. out 2009 8 30
- 102. out in . 2009 8 30
- 103. Intel-VT 2009 8 30
- 104. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 105. 2009 8 30
- 106. Qemu 2009 8 30
- 107. User Qemu Program IOCTL return Linux Guest KVM Kernel Kernel 2009 8 30
- 108. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 109. int kvm_cpu_exec(){ ... 461 ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); 478 switch (run->exit_reason) { 479 case KVM_EXIT_IO: 481 ret = kvm_handle_io(env, run->io.port, 482 (uint8_t *)run + run>io.data_offset, 483 run->io.direction, 484 run->io.size, 485 run->io.count); 486 break; case KVM_EXIT_MMIO: .... ... 2009 8 30
- 110. outb 2009 8 30
- 111. int kvm_cpu_exec(){ ... // 461 ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); 478 switch (run->exit_reason) { 479 case KVM_EXIT_IO: 481 ret = kvm_handle_io(env, run->io.port, 482 (uint8_t *)run + run>io.data_offset, 483 run->io.direction, 484 run->io.size, 485 run->io.count); 486 break; case KVM_EXIT_MMIO: outb .... ... 2009 8 30
- 112. 2009 8 30
- 113. IO 2009 8 30
- 114. User Qemu Program io Linux Guest KVM Kernel Kernel 2009 8 30
- 115. 2009 8 30
- 116. out 2009 8 30
- 117. outb %al 2009 8 30
- 118. outb %al 2009 8 30
- 119. ( ) 2009 8 30
- 120. int kvm_cpu_exec(){ ... // 461 ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); 478 switch (run->exit_reason) { 479 case KVM_EXIT_IO: 481 ret = kvm_handle_io(env, run->io.port, 482 (uint8_t *)run + run>io.data_offset, 483 run->io.direction, 484 run->io.size, 485 run->io.count); 486 break; case KVM_EXIT_MMIO: .... ... 2009 8 30
- 121. kvm_handle_io cpu_outb ioport_write 2009 8 30
- 122. static void ioport_write(intindex, uint32_t address, uint32_t data) { static IOPortWriteFunc *default_func[3] = { default_ioport_writeb, default_ioport_writew, default_ioport_writel }; IOPortWriteFunc *func = ioport_write_table[index][address]; if (!func) func = default_func[index]; func(ioport_opaque[address], address, data); } ioport_write_table 2009 8 30
- 123. ( ) 2009 8 30
- 124. User Qemu Program io Linux Guest KVM Kernel Kernel 2009 8 30
- 125. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 126. User Qemu Program Linux Guest KVM Kernel Kernel 2009 8 30
- 127. 2009 8 30
- 128. IOCTL CPU 2009 8 30
- 129. 2009 8 30
- 130. 378 static intkvm_main_loop_cpu(CPUState *env) 379 { 394 while (1) { 395 while (!has_work(env)) 396 kvm_main_loop_wait(env, 1000); 397 if (env->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI)) 398 env->halted = 0; // . .... 404 } 405 if (!env->halted && !env->kvm_cpu_state.init) { 406 kvm_cpu_exec(env); // } } 413 } 2009 8 30
- 131. User Qemu Program IOCTL Linux Guest KVM Kernel Kernel 2009 8 30
- 132. 2009 8 30
- 133. ... 2009 8 30
- 134. User Qemu Program IOCTL Linux Guest KVM Kernel Kernel vmlaunch vmresume 2009 8 30
- 135. 2009 8 30
- 136. ? 2009 8 30