executor: sys/linux: SYZOS: add AMD VMLOAD and VMSAVE primitives #6637
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This patch introduces SYZOS_API_NESTED_AMD_VMLOAD and SYZOS_API_NESTED_AMD_VMSAVE. These primitives allow the L1 guest to execute the VMLOAD and VMSAVE instructions, which load/store additional guest state (FS, GS, TR, LDTR, etc.) to/from the VMCB specified by the 'vm_id' argument. This stresses the KVM L0 instruction emulator, which must validate the L1-provided physical address in RAX and perform the state transfer.
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a-nogikh
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Jan 20, 2026
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This patch introduces SYZOS_API_NESTED_AMD_VMLOAD and SYZOS_API_NESTED_AMD_VMSAVE.
These primitives allow the L1 guest to execute the VMLOAD and VMSAVE instructions, which load/store additional guest state (FS, GS, TR, LDTR, etc.) to/from the VMCB specified by the 'vm_id' argument.
This stresses the KVM L0 instruction emulator, which must validate the L1-provided physical address in RAX and perform the state transfer.
Before sending a pull request, please review Contribution Guidelines:
https://github.com/google/syzkaller/blob/master/docs/contributing.md