Re: [PATCH v3 1/4] x86/tdx: Add helper to query maximum TD Quote size

[Tony Lindgren]

On Wed, Jul 29, 2026 at 05:29:31AM -0700, Peter Fang wrote:
> +/**
> + * tdx_get_max_quote_size() - Get the maximum TD Quote size
> + *
> + * Read the maximum size of a TD Quote from a 4-byte TD metadata field. The TDX
> + * guest driver uses it to size the buffer for Quote retrieval. Older TDX
> + * modules do not support this field and return an error.
> + *
> + * Return: Maximum Quote size in bytes on success, or 0 on failure.
> + */
> +u32 tdx_get_max_quote_size(void)
> +{
> +	u64 val, ret;
> +
> +	ret = tdg_vm_rd(TDCS_QUOTE_MAX_SIZE, &val);
> +
> +	return ret ? 0 : (u32)val;
> +}

I think you can leave out the u32 cast above.

Other than that:

Reviewed-by: Tony Lindgren <tony.lindgren@xxxxxxxxxxxxxxx>