Re: [PATCH v3 3/6] x86/jailhouse: Enable PCI mmconfig access in inmates

[Jan Kiszka]

On 2018-03-01 11:31, Andy Shevchenko wrote:
> On Thu, Mar 1, 2018 at 7:40 AM, Jan Kiszka <jan.kiszka@xxxxxxxxxxx> wrote:
> 
>> Use the PCI mmconfig base address exported by jailhouse in boot
>> parameters in order to access the memory mapped PCI configuration space.
> 
> 
>> --- a/arch/x86/kernel/jailhouse.c
>> +++ b/arch/x86/kernel/jailhouse.c
>> @@ -124,6 +124,13 @@ static int __init jailhouse_pci_arch_init(void)
>>         if (pcibios_last_bus < 0)
>>                 pcibios_last_bus = 0xff;
>>
>> +#ifdef CONFIG_PCI_MMCONFIG
>> +       if (setup_data.pci_mmconfig_base) {
> 
>> +               pci_mmconfig_add(0, 0, 0xff, setup_data.pci_mmconfig_base);
> 
> Hmm... Shouldn't be pcibios_last_bus instead of 0xff?
> 

Indeed.

Thanks,
Jan

>> +               pci_mmcfg_arch_init();
>> +       }
>> +#endif
> 
-- 
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