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TDX host core code implements three seamcall*() helpers to make SEAMCALLs to the TDX module. Currently, they are implemented in <asm/tdx.h> and are exposed to other kernel code which includes <asm/tdx.h>. However, other than the TDX host core, seamcall*() are not expected to be used by other kernel code directly. For instance, for all SEAMCALLs that are used by KVM, the TDX host core exports a wrapper function for each of them. Move seamcall*() and related code out of <asm/tdx.h> and make them only visible to TDX host core. Since TDX host core tdx.c is already very heavy, don't put low level seamcall*() code there but to a new dedicated "seamcall_internal.h". Also, currently tdx.c has seamcall_prerr*() helpers which additionally print error message when calling seamcall*() fails. Move them to "seamcall_internal.h" as well. In such way all low level SEAMCALL helpers are in a dedicated place, which is much more readable. Copy the copyright notice from the original files and consolidate the date ranges to: Copyright (C) 2021-2023 Intel Corporation Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Chao Gao <chao.gao@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com> Reviewed-by: Tony Lindgren <tony.lindgren@linux.intel.com> Reviewed-by: Kiryl Shutsemau (Meta) <kas@kernel.org> Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com> Reviewed-by: Vishal Annapurve <vannapurve@google.com> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://patch.msgid.link/20260520133909.409394-6-chao.gao@intel.com