Intel ARCHITECTURE IA-32 User Manual Page 21

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Vol. 3A xxi
CONTENTS
PAGE
22.3.2.1 Loading Guest Control Registers, Debug Registers, and MSRs . . . . . . . . 21-14
22.3.2.2 Loading Guest Segment Registers and Descriptor-Table
Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-16
22.3.2.3 Loading Guest RIP, RSP, and RFLAGS. . . . . . . . . . . . . . . . . . . . . . . . . . . 21-17
22.3.2.4 Loading Page-Directory Pointers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-17
22.3.3 Clearing Address-Range Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-17
22.4 LOADING MSRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-17
22.5 EVENT INJECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-18
22.5.1 Details of Event Injection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-18
22.5.2 VM Exits During Event Injection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-20
22.6 SPECIAL FEATURES OF VM ENTRY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-21
22.6.1 Interruptibility State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-21
22.6.2 Activity State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-22
22.6.3 Delivery of Pending Debug Exceptions after VM Entry . . . . . . . . . . . . . . . . . . 21-22
22.6.4 Interrupt-Window Exiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-23
22.6.5 VM Entries and Advanced Debugging Features . . . . . . . . . . . . . . . . . . . . . . . 21-24
22.7 VM-ENTRY FAILURES DURING OR AFTER LOADING GUEST STATE. . . . . . 21-24
22.8 MACHINE CHECKS DURING VM ENTRY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-25
CHAPTER 23
VM EXITS
23.1 ARCHITECTURAL STATE BEFORE A VM EXIT . . . . . . . . . . . . . . . . . . . . . . . . . 22-1
23.2 RECORDING VM-EXIT INFORMATION AND UPDATING CONTROLS. . . . . . . . 22-4
23.2.1 Basic VM-Exit Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-5
23.2.2 Information for VM Exits Due to Vectored Events . . . . . . . . . . . . . . . . . . . . . . . 22-9
23.2.3 Information for VM Exits During Event Delivery. . . . . . . . . . . . . . . . . . . . . . . . 22-10
23.2.4 Information for VM Exits Due to Instruction Execution. . . . . . . . . . . . . . . . . . . 22-11
23.3 SAVING GUEST STATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-12
23.3.1 Saving Control Registers, Debug Registers, and MSRs . . . . . . . . . . . . . . . . . 22-12
23.3.2 Saving Segment Registers and Descriptor-Table Registers . . . . . . . . . . . . . . 22-13
23.3.3 Saving RIP, RSP, and RFLAGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-14
23.3.4 Saving Non-Register State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-15
23.4 SAVING MSRS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-17
23.5 LOADING HOST STATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-17
23.5.1 Loading Host Control Registers, Debug Registers, MSRs . . . . . . . . . . . . . . . 22-18
23.5.2 Loading Host Segment and Descriptor-Table Registers . . . . . . . . . . . . . . . . . 22-19
23.5.3 Loading Host RIP, RSP, and RFLAGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-20
23.5.4 Checking and Loading Host Page-Directory Pointers . . . . . . . . . . . . . . . . . . . 22-20
23.5.5 Updating Non-Register State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-21
23.5.6 Clearing Address-Range Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-21
23.6 LOADING MSRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-21
23.7 VMX ABORTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-22
23.8 MACHINE CHECK DURING VM EXIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-23
CHAPTER 24
SYSTEM MANAGEMENT
24.1 SYSTEM MANAGEMENT MODE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-1
24.1.1 System Management Mode and VMX Operation . . . . . . . . . . . . . . . . . . . . . . . 26-2
24.2 SYSTEM MANAGEMENT INTERRUPT (SMI). . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-2
24.3 SWITCHING BETWEEN SMM AND THE OTHER
PROCESSOR OPERATING MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-3
24.3.1 Entering SMM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-3
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