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f5f1d9f86b
This implements NPT suport for SVM by hooking into x86_cpu_handle_mmu_fault where it reads the stage-1 page table. Whether we need to perform this 2nd stage translation, and how, is decided during vmrun and stored in hflags2, along with nested_cr3 and nested_pg_mode. As get_hphys performs a direct cpu_vmexit in case of NPT faults, we need retaddr in that function. To avoid changing the signature of cpu_handle_mmu_fault, this passes the value from tlb_fill to get_hphys via the CPU state. This was tested successfully via the Jailhouse hypervisor. Backports commit fe441054bb3f0c75ff23335790342c0408e11c3a from qemu |
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