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Re: [Xen-devel] [PATCH 3/3] x86/pvh: Print the PVH start info more concisely


  • To: Jan Beulich <JBeulich@xxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Wed, 23 Jan 2019 12:26:01 +0000
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  • Cc: Juergen Gross <jgross@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
  • Delivery-date: Wed, 23 Jan 2019 12:26:13 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 23/01/2019 11:42, Jan Beulich wrote:
>
>> --- a/xen/arch/x86/guest/pvh-boot.c
>> +++ b/xen/arch/x86/guest/pvh-boot.c
>> @@ -123,28 +123,29 @@ void __init pvh_print_info(void)
>>      const struct hvm_modlist_entry *entry;
>>      unsigned int i;
>>  
>> -    ASSERT(pvh_info->magic == XEN_HVM_START_MAGIC_VALUE);
>> -
>> -    printk("PVH start info: (pa %08x)\n", pvh_start_info_pa);
>> -    printk("  version:    %u\n", pvh_info->version);
>> -    printk("  flags:      %#"PRIx32"\n", pvh_info->flags);
>> -    printk("  nr_modules: %u\n", pvh_info->nr_modules);
>> -    printk("  modlist_pa: %016"PRIx64"\n", pvh_info->modlist_paddr);
>> -    printk("  cmdline_pa: %016"PRIx64"\n", pvh_info->cmdline_paddr);
>> +    printk("PVH start info: (pa 0x%08x)\n", pvh_start_info_pa);
>> +    printk("  version %u, flags %#x\n", pvh_info->version, pvh_info->flags);
>> +
>> +    printk("  cmdline 0x%08"PRIx64, pvh_info->cmdline_paddr);
>>      if ( pvh_info->cmdline_paddr )
>> -        printk("  cmdline:    '%s'\n", (char 
>> *)__va(pvh_info->cmdline_paddr));
>> -    printk("  rsdp_pa:    %016"PRIx64"\n", pvh_info->rsdp_paddr);
>> +        printk(" '%s'", (char *)__va(pvh_info->cmdline_paddr));
> Is the cast here really necessary?

Yes.  Omitting it causes -Wformat to object to passing void* into
something expecting char*.

~Andrew

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