VMX: Difference between revisions

The main entry point for using VMX is through the VMXON instruction. The instruction requires a single operand of an m32 ora m64 region called an VMCS (Virtual-Machine Control Structure). The memory region needs to be size_t4096-byte aligned (Ibits use 160-byte11 alignment tomust be safe0) and the only VMCS field that should be modified is the VMCS revision identification field. This ID field should contain the value in bits 0-31 of MSR IA32_VMX_BASIC. In order to prepare a memory address in 32-bit PMode for use as an m64, some modifications need to be made. The upper 32-bits of the m64 have to be 0 or an "invalid memory address" error will occur and a VMEXIT will be called.