Re: [RFC PATCH 26/27] x86/virt/tdx: Add SEAMCALL wrappers for IDE stream management

[Jonathan Cameron <jonathan.cameron@huawei.com>]

On Fri, 19 Sep 2025 07:22:35 -0700
Dan Williams <dan.j.williams@intel.com> wrote:

> From: Xu Yilun <yilun.xu@linux.intel.com>
> 
> Add several SEAMCALL wrappers for IDE stream management.
> 
> - TDH.IDE.STREAM.CREATE creates IDE stream metadata buffers for TDX
>   Module, and does root port side IDE configuration.
> - TDH.IDE.STREAM.BLOCK clears the root port side IDE configuration.
> - TDH.IDE.STREAM.DELETE releases the IDE stream metadata buffers.
> - TDH.IDE.STREAM.KM deals with the IDE Key Management protocol (IDE-KM)
> 
> More information see Intel TDX Connect ABI Specification [1]
> Section 3.2 TDX Connect Host-Side (SEAMCALL) Interface Functions.
> 
> [1]: https://cdrdv2.intel.com/v1/dl/getContent/858625
> 
> Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>

> diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c
> index 86dd855d7361..179c976eab01 100644
> --- a/arch/x86/virt/vmx/tdx/tdx.c
> +++ b/arch/x86/virt/vmx/tdx/tdx.c

> +
> +u64 tdh_ide_stream_block(u64 spdm_id, u64 stream_id)
> +{
> +	struct tdx_module_args args = {
> +		.rcx = spdm_id,
> +		.rdx = stream_id,
> +	};
> +	u64 r;
> +
> +	r = seamcall(TDH_IDE_STREAM_BLOCK, &args);
> +
> +	return r;

	return seamcall()