On Tue, Jan 17, 2023 at 02:10:08PM +0000, Boeuf, Sebastien wrote: > Hi, > > Looking at the hardcoded limitation provided by PcdPciMmio64Size > (32GiB), I was wondering what would be the best approach to make this a > bit more dynamic? > > I know that for QEMU, the fw_cfg mechanism can be used to override the > value of PcdPciMmio64Size, but this isn't something Cloud Hypervisor or > other VMMs can implement given they don't support fw_cfg at all. > > Would it be acceptable to dynamically compute PcdPciMmio64Size from the > physical address space? Given the reason why PcdPciMmio64Size can't be > increased is to make sure it can support host with small address space > (such as 36 bits), we could introduce a very simple function that would > determine the available address space and consider PcdPciMmio64Size > being half the size.
Sure, check master branch, the code is already there. Should just be a matter of wiring up the function calls for cloundhv, and you can probably call PlatformAddressWidthFromCpuid() with QemuQuirk = false unconditionally. take care, Gerd -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#98698): https://edk2.groups.io/g/devel/message/98698 Mute This Topic: https://groups.io/mt/96330209/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
