Re: [PATCH v7 14/20] x86/virt/tdx: Set up reserved areas for all TDMRs

[Dave Hansen]

On 11/28/22 01:14, Huang, Kai wrote:
> On Wed, 2022-11-23 at 15:39 -0800, Dave Hansen wrote:
...
>> /*
>>  * Go through tdx_memlist to find holes between memory areas.  If any of
>>  * those holes fall within @tdmr, set up a TDMR reserved area to cover
>>  * the hole.
>>  */
>> static int tdmr_populate_rsvd_holes(struct list_head *tdx_memlist,
>> 				    struct tdmr_info *tdmr,
>> 				    int *rsvd_idx)
> 
> Thanks!
> 
> Should I also change below function 'tdmr_set_up_pamt_rsvd_areas()' to, i.e.
> tdmr_populate_rsvd_pamts()?
> 
> Actually, there are two more functions in this patch: tdmr_set_up_rsvd_areas()
> and tdmrs_set_up_rsvd_areas_all().  Should I also change them to
> tdmr_populate_rsvd_areas() and tdmrs_populate_rsvd_areas_all()? 

I don't know.  I'll look at the naming again once I see it all together.

>> but I also get the feeling that 'prev_end' is a crummy variable name.  I
>> don't have any better suggestions at the moment.
>>
>>> +	list_for_each_entry(tmb, &tdx_memlist, list) {
>>> +		u64 start, end;
>>> +
>>> +		start = tmb->start_pfn << PAGE_SHIFT;
>>> +		end = tmb->end_pfn << PAGE_SHIFT;
>>> +
>>
>> More alignment opportunities:
>>
>> 		start = tmb->start_pfn << PAGE_SHIFT;
>> 		end   = tmb->end_pfn   << PAGE_SHIFT;
> 
> Should I use PFN_PHYS()?  Then looks we don't need this alignment.

Sure.