Messages in this thread | | | Date | Thu, 27 Jun 2013 13:39:23 -0500 | From | Scott Wood <> | Subject | Re: [PATCH 8/8] KVM: PPC: Add hugepage support for IOMMU in-kernel handling |
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On 06/27/2013 12:02:36 AM, Alexey Kardashevskiy wrote: > +/* > + * The KVM guest can be backed with 16MB pages. > + * In this case, we cannot do page counting from the real mode > + * as the compound pages are used - they are linked in a list > + * with pointers as virtual addresses which are inaccessible > + * in real mode. > + * > + * The code below keeps a 16MB pages list and uses page struct > + * in real mode if it is already locked in RAM and inserted into > + * the list or switches to the virtual mode where it can be > + * handled in a usual manner. > + */ > +#define KVMPPC_HUGEPAGE_HASH(gpa) hash_32(gpa >> 24, 32) > + > +struct kvmppc_iommu_hugepage { > + struct hlist_node hash_node; > + unsigned long gpa; /* Guest physical address */ > + unsigned long hpa; /* Host physical address */ > + struct page *page; /* page struct of the very first > subpage */ > + unsigned long size; /* Huge page size (always 16MB at the > moment) */ > +};
Shouldn't this be namespaced to something like "book3s" or "spapr"?
-Scott
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