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de8e8ebb1a
KVM TDX changes for 6.19: - Overhaul the TDX code to address systemic races where KVM (acting on behalf of userspace) could inadvertantly trigger lock contention in the TDX-Module, which KVM was either working around in weird, ugly ways, or was simply oblivious to (as proven by Yan tripping several KVM_BUG_ON()s with clever selftests). - Fix a bug where KVM could corrupt a vCPU's cpu_list when freeing a vCPU if creating said vCPU failed partway through. - Fix a few sparse warnings (bad annotation, 0 != NULL). - Use struct_size() to simplify copying capabilities to userspace.