Re: [Xen-devel] PATCH [base vtpm and libxl patches 4/6] add iomem support to libxl

[Matthew Fioravante <matthew.fioravante@xxxxxxxxxx>]

On 09/25/2012 06:30 AM, Ian Campbell wrote:
> On Fri, 2012-09-21 at 20:03 +0100, Matthew Fioravante wrote:
>
>> +        if ( ret<0 ){
> Tiny coding style nit, this should be
>       if (ret < 0) { 
Will fix
>> +            LOGE(ERROR,
>> +                 "failed give dom%d access to iomem range
>> %"PRIx64"-%"PRIx64,
>> +                 domid, io->start, io->start + io->number - 1);
>> +            ret = ERROR_FAIL;
>> +        }
>> +    }
>> +
>> +
>> +
>>      for (i = 0; i < d_config->num_nics; i++) {
>>          /* We have to init the nic here, because we still haven't
>>           * called libxl_device_nic_add at this point, but qemu needs
>> @@ -1005,6 +1005,30 @@ static void parse_config_data(const char
>> *config_source,
>>          }
>>      }
>>  
>> +    if (!xlu_cfg_get_list(config, "iomem", &iomem, &num_iomem, 0)) {
>> +        b_info->num_iomem = num_iomem;
>> +        b_info->iomem = calloc(num_iomem, sizeof(*b_info->iomem));
>> +        if (b_info->iomem == NULL) {
>> +            fprintf(stderr, "unable to allocate memory for iomem\n");
>> +            exit(-1);
>> +        }
>> +        for (i = 0; i < num_iomem; i++) {
>> +            buf = xlu_cfg_get_listitem (iomem, i);
>> +            if (!buf) {
>> +                fprintf(stderr,
>> +                        "xl: Unable to get element %d in iomem list\n", i);
>> +                exit(1);
>> +            }
>> +            if(sscanf(buf, "%" SCNx64",%" SCNu64,
>> &b_info->iomem[i].start, &b_info->iomem[i].number) != 2) {
> This should be relatively simply to parse with strtoul (see the ioports
> case) which would allow people to select hex or decimal in their
> configuration files.
Do we want to support hex or decimal? Pretty much anytime people start
talking about physical memory addresses or page numbers they use hex.
Also the ioports code actually only supports hexadecimal as it sets the
base in strtoul to 16. It also explicitly says in the xl.cfg manpage
that ioports should be given in hex.
>
> Ian
>

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