Support Hygon Trusted Key Management run on CSV Guest · Pull Request !26 · anolis/qemu-kvm

Patch List：
1. hw/i386/pc: add mem2 option for qemu
> Add a mem2 option for qemu to reserve a 2MB hugepage memory space for the virtual machine to share with the host. The -mem2 option has two sub-options, base and size, which are used to specify the base address and size of the virtual machine's memory space, which is essentially a GPA address range.
After specifying the -mem2 parameter, the qemu process will dynamically allocate and map multiple 2M hugepages when it starts, and map the hugepage address range to the GPA range specified by the virtual machine.
This 2M hugepage address space shared with the host will not be used as DRAM and MMIO by the virtual machine's BIOS, but belongs to the Reserved space, and is multiple continuous 2MB memory on the HPA, so that the peripheral hardware can directly read and write the data written by the virtual machine on the HPA.

2. hw/misc/psp: support tkm use mem2 memory
> The psp device binds the memory range specified by -mem2 to tkm vid

3. hw/misc/psp: Pin the hugepage memory specified by mem2 during use for psp
> Pin the hugepage specified by -mem2 through a specific ioctl call to prevent hugepages from migrating

类型	指派人员	状态
审查	shannon.zhao 已审查通过 yixingrui 已审查通过	已完成 (2/1人)
测试	shannon.zhao 已测试通过 yixingrui 已测试通过	已完成 (2/1人)

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