Re: [PATCH V3 03/10] PCI/TPH: Add pci=notph to prevent use of TPH

[Wei Huang]

On 7/24/24 10:36, Bjorn Helgaas wrote:
> On Wed, Jul 24, 2024 at 03:45:34PM +0100, Alejandro Lucero Palau wrote:
>> On 7/17/24 21:55, Wei Huang wrote:
>>> TLP headers with incorrect steering tags (e.g. caused by buggy driver)
>>> can potentially cause issues when the system hardware consumes the tags.
>>> Provide a kernel option, with related helper functions, to completely
>>> prevent TPH from being enabled.
>>
>> Maybe rephrase it for including a potential buggy device, including the cpu.
>>
>> Also, what about handling this with a no-tph-allow device list instead of a
>> generic binary option for the whole system?
>>
>> Foreseeing some buggy or poor-performance implementations, or specific use
>> cases where it could be counterproductive, maybe supporting both options.
> 
> Makes sense if/when we need it.  IMO no point in adding an empty list
> of known-broken devices.

We can add quirks.c, or something similar later, after TPH support is
enabled.