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>>> +    if (rc) >>> +            return pcibios_err_to_errno(rc); >>> + >>> +    if (!(ctrl & PCI_DVSEC_CXL_CACHE_ENABLE) || >>> +        !(ctrl & PCI_DVSEC_CXL_MEM_ENABLE)) >>> +            return -ENOTTY; > > > Type2 cache support is coming and it could be CXL.cache forced to > disable if IOMMU enabled and the device not supporting ATS nor belonging > to IOMMU identity mapping (Benjamin Cheatham will send this support > soon). In that case, I can not see a reason for not allowing a reset > assuming CXL.mem would be still usable independently of CXL.cache > functionality. Alejandro, I forgot to fold this into my earlier reply to Jonathan. Ack, on the requirement. But before changing the eligibility check, I would like to confirm whether the existing reset policy around cache invalidation & memory handling otherwise applies unchanged to this configuration. I left the v13 checks unchanged for now, I'll update based on the pointers. -- Regards, Srirangan