[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Design doc of adding ACPI support for arm64 on Xen - version 2
On 2015/8/12 16:47, Ian Campbell wrote: > On Wed, 2015-08-12 at 10:47 +0800, Shannon Zhao wrote: >> >> On 2015/8/11 23:52, Boris Ostrovsky wrote: >>> On 08/11/2015 11:35 AM, Ian Campbell wrote: >>>> On Tue, 2015-08-11 at 11:29 -0400, Boris Ostrovsky wrote: >>>>> On 08/11/2015 10:21 AM, Ian Campbell wrote: >>>>>> On Tue, 2015-08-11 at 15:19 +0100, Ian Campbell wrote: >>>>>>> On Fri, 2015-08-07 at 10:11 +0800, Shannon Zhao wrote: >>>>>>>> This document is going to explain the design details of Xen >>>>>>>> booting >>>>>>>> with >>>>>>>> ACPI on ARM. Maybe parts of it may not be appropriate. Any >>>>>>>> comments >>>>>>>> are >>>>>>>> welcome. >>>>>>> Some small subsets of this seem like they might overlap with >>>>>>> what >>>>>>> will be >>>>>>> required for PVH on x86 (a new x86 guest mode not dissimilar to >>>>>>> the >>>>>>> sole >>>>>>> ARM guest mode). If so then it would be preferable IMHO if PVH >>>>>>> x86 >>>>>>> could >>>>>>> use the same interfaces. >>>>>>> >>>>>>> I've trimmed the quotes to just those bits and CCd some of the >>>>>>> PVH >>>>>>> people >>>>>>> (Boris and Roger[0]) in case they have any thoughts. >>>>>>> >>>>>>> Actually, having done the trimming there is only one such bit: >>>>>>> >>>>>>> [...] >>>>>>>> 4. Map MMIO regions >>>>>>>> ------------------- >>>>>>>> Register a bus_notifier for platform and amba bus in Linux. >>>>>> Previously PCI was included in this scheme, which is why I >>>>>> thought of >>>>>> PVH, >>>>>> having missed that PCI wasn't mentioned here now. >>>>>> >>>>>> Is it handled some other way now or is that just an accidental >>>>>> omission? >>>>> PCI already has a bus notifier which is probably why it's not >>>>> explicitly >>>>> called out here. >>>> Right, but I was more specifically thinking of the bit which followed >>>> regarding the use of the notifier to map the MMIO, which is the more >>>> important bit. >>> >>> This notifier calls PHYSDEVOP_pci_device_add and as far as I can tell >>> MMIO is mapped there (for IOMMU, which IIUIC is the main issue here). >> >> Right, at this moment we only add platform and amba bus bus_notifier. >> The PCI device can reuse existing bus_notifier. > > Super. Perhaps add a sentence to that effect so I remember that this > already exists next time? > Ok. Will add. -- Shannon _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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