Re: [PATCH v3 03/26] x86/virt/tdx: Move low level SEAMCALL helpers out of <asm/tdx.h>

[Chao Gao <chao.gao@intel.com>]

On Wed, Jan 28, 2026 at 09:37:05AM +0800, Binbin Wu wrote:
>
>
>On 1/23/2026 10:55 PM, Chao Gao wrote:
>> From: Kai Huang <kai.huang@intel.com>
>> 
>> TDX host core code implements three seamcall*() helpers to make SEAMCALL
>> 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.h".  Also,
>> currently tdx.c has seamcall_prerr*() helpers which additionally print
>> error message when calling seamcall*() fails.  Move them to "seamcall.h"
>> as well.  In such way all low level SEAMCALL helpers are in a dedicated
>> place, which is much more readable.
>> 
>> Signed-off-by: Kai Huang <kai.huang@intel.com>
>> Signed-off-by: Chao Gao <chao.gao@intel.com>
>> Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
>
>Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
>
>One question below.
>
>[...]
>
>> diff --git a/arch/x86/virt/vmx/tdx/seamcall.h b/arch/x86/virt/vmx/tdx/seamcall.h
>> new file mode 100644
>> index 000000000000..0912e03fabfe
>> --- /dev/null
>> +++ b/arch/x86/virt/vmx/tdx/seamcall.h
>> @@ -0,0 +1,99 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/* Copyright (C) 2025 Intel Corporation */
>
>Should this be updated to 2026?

Yes. And I may drop the copyright notice if it is not necessary.

According to [1][2], it seems to be optional or even discouraged.

[1]: https://lwn.net/Articles/912355/
[2]: https://www.linuxfoundation.org/blog/blog/copyright-notices-in-open-source-software-projects