Intel ARCHITECTURE IA-32 User Manual Page 20

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CONTENTS
xx
Vol. 3A
PAGE
20.7 VM-EXIT CONTROL FIELDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-14
20.7.1 VM-Exit Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-14
20.7.2 VM-Exit Controls for MSRs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-15
20.8 VM-ENTRY CONTROL FIELDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-15
20.8.1 VM-Entry Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-16
20.8.2 VM-Entry Controls for MSRs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-16
20.8.3 VM-Entry Controls for Event Injection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-17
20.9 VM-EXIT INFORMATION FIELDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-18
20.9.1 Basic VM-Exit Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-18
20.9.2 Information for VM Exits Due to Vectored Events. . . . . . . . . . . . . . . . . . . . . . .20-19
20.9.3 Information for VM Exits That Occur During Event Delivery . . . . . . . . . . . . . . .20-19
20.9.4 Information for VM Exits Due to Instruction Execution . . . . . . . . . . . . . . . . . . .20-20
20.9.5 VM-Instruction Error Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-22
20.10 SOFTWARE ACCESS TO THE VMCS AND RELATED STRUCTURES . . . . . . 20-22
20.10.1 Software Access to the Virtual-Machine Control Structure . . . . . . . . . . . . . . . .20-22
20.10.2 VMREAD, VMWRITE, and Encodings of VMCS Fields . . . . . . . . . . . . . . . . . .20-23
20.10.3 Software Access to Related Structures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-26
20.10.4 The VMXON Region . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-26
20.11 USING VMCLEAR TO INITIALIZE A VMCS REGION. . . . . . . . . . . . . . . . . . . . . 20-26
CHAPTER 21
VMX NON-ROOT OPERATION
21.1 INSTRUCTIONS THAT CAUSE VM EXITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-1
21.1.1 Relative Priority of IA-32 Faults and VM Exits. . . . . . . . . . . . . . . . . . . . . . . . . . .19-2
21.1.2 Instructions That Cause VM Exits Unconditionally . . . . . . . . . . . . . . . . . . . . . . .19-2
21.1.3 Instructions That Cause VM Exits Conditionally . . . . . . . . . . . . . . . . . . . . . . . . .19-3
21.2 OTHER CAUSES OF VM EXITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-5
21.3 CHANGES TO INSTRUCTION BEHAVIOR IN VMX NON-ROOT OPERATION . 19-7
21.4 OTHER CHANGES IN VMX NON-ROOT OPERATION . . . . . . . . . . . . . . . . . . . 19-10
21.4.1 Event Blocking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-10
21.4.2 Treatment of Task Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-10
CHAPTER 22
VM ENTRIES
22.1 BASIC VM-ENTRY CHECKS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-2
22.2 CHECKS ON VMX CONTROLS AND HOST-STATE AREA. . . . . . . . . . . . . . . . . 21-3
22.2.1 Checks on VMX Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-3
22.2.1.1 VM-Execution Control Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-3
22.2.1.2 VM-Exit Control Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-4
22.2.1.3 VM-Entry Control Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-5
22.2.2 Checks on Host Control Registers and MSRs. . . . . . . . . . . . . . . . . . . . . . . . . . .21-6
22.2.3 Checks on Host Segment and Descriptor-Table Registers. . . . . . . . . . . . . . . . .21-6
22.2.4 Checks Related to Address-Space Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-7
22.3 CHECKING AND LOADING GUEST STATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-7
22.3.1 Checks on the Guest State Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-7
22.3.1.1 Checks on Guest Control Registers, Debug Registers, and MSRs . . . . . . . .21-8
22.3.1.2 Checks on Guest Segment Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-8
22.3.1.3 Checks on Guest Descriptor-Table Registers . . . . . . . . . . . . . . . . . . . . . . .21-11
22.3.1.4 Checks on Guest RIP and RFLAGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-11
22.3.1.5 Checks on Guest Non-Register State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-12
22.3.1.6 Checks on Guest Page-Directory Pointers. . . . . . . . . . . . . . . . . . . . . . . . . .21-14
22.3.2 Loading Guest State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-14
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