On 10/26/23 10:33, Gerd Hoffmann wrote: > On Thu, Oct 26, 2023 at 10:36:35AM +0800, Yoshinoya wrote: > >> CXL Host Bridge / Root Port / Switch / Device enumeration / HDM Config, >> maybe could be integrated into pci drivers stack. > > Point being? Can or should the firmware do anything useful with > the CXL hardware? If so, what exactly and why? > > Current state of affairs is that the PCI stack does the usual PCI > initialization (enumerate, assign resources to PCI bars) and leaves > everything else to the OS.
(I don't know what "HDM Config" stands for.) The only utility for driving CXL devices from the firmware could be, AFAICT: - booting off of such a device (or at least "supporting OS boot" in some manner) - using such a device for UEFI console purposes Laszlo -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#110085): https://edk2.groups.io/g/devel/message/110085 Mute This Topic: https://groups.io/mt/102173204/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/leave/9847357/21656/1706620634/xyzzy [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
