Re: [PATCH v11 05/20] x86/virt/tdx: Add SEAMCALL infrastructure

[Dave Hansen]

On 6/19/23 05:52, David Hildenbrand wrote:
>> +    /*
>> +     * SEAMCALL caused #GP or #UD.  By reaching here %eax contains
>> +     * the trap number.  Convert the trap number to the TDX error
>> +     * code by setting TDX_SW_ERROR to the high 32-bits of %rax.
>> +     *
>> +     * Note cannot OR TDX_SW_ERROR directly to %rax as OR instruction
>> +     * only accepts 32-bit immediate at most.
> 
> Not sure if that comment is really helpful here. It's a common pattern
> for large immediates, no?

It's a question of whether you write the comments for folks that read
x86 assembly all the time or not.

I think the comment is helpful.