Crate x86_64

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x86 architecture support.

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  • Add an e820 region to the e820 map.
  • Returns a Vec of the valid memory addresses. These should be used to configure the GuestMemory structure for the platform. For x86_64 all addresses are valid from the start of the kernel except a carve out at the end of 32bit address space.
  • bios_start 🔒
    The x86 reset vector for i386+ and x86_64 puts the processor into an “unreal mode” where it can access the last 1 MB of the 32-bit address space in 16-bit mode, and starts the instruction pointer at the effective physical address 0xFFFF_FFF0.
  • Check if host supports hybrid CPU feature. The check include: 1. Check if CPUID.1AH exists. CPUID.1AH is hybrid information enumeration leaf. 2. Check if CPUID.07H.00H:EDX[bit 15] sets. This bit means the processor is identified as a hybrid part. 3. Check if CPUID.1AH:EAX sets. The hybrid core type is set in EAX.
  • Generate a memory map in INT 0x15 AX=0xE820 format.
  • Generate a SETUP_RNG_SEED SetupData with random seed data.
  • Write setup_data entries in guest memory and link them together with the next field.

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