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KVmStore

ostd::specs::mm::embedding::kvirt_store

Struct KVmStore 

Source 
pub struct KVmStore {
    pub regions: MetaRegionOwners,
    pub kernel_pt: PageTableOwner<KernelPtConfig>,
    pub kvirt_areas: Map<KVirtId, Range<Vaddr>>,
}
Expand description

One-step-soundness store for the kernel virtual area API. Holds the shared regions, the single global kernel page table kernel_pt, and the set of allocated kernel virtual areas (each a Range<Vaddr> handle — see the module docs).

The kernel analog of super::VmStore; see the module documentation for how it differs (one global PT vs. a map of user VmSpaces).

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§regions: MetaRegionOwners§kernel_pt: PageTableOwner<KernelPtConfig>§kvirt_areas: Map<KVirtId, Range<Vaddr>>

Implementations§

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impl KVmStore

Source

pub open spec fn inv(self) -> bool

{
    &&& self.regions.inv()
    &&& self.kernel_pt.inv()
    &&& self.kernel_pt.metaregion_sound(self.regions)
    &&& forall |id: KVirtId| {
        #[trigger] self.kvirt_areas.dom().contains(id)
            ==> {
                let r = self.kvirt_areas[id];
                &&& KERNEL_BASE_VADDR <= r.start
                &&& r.end <= FRAME_METADATA_BASE_VADDR
                &&& r.start % PAGE_SIZE == 0
                &&& r.end % PAGE_SIZE == 0
                &&& r.start <= r.end

            }
    }

}

The store’s top-level invariant.

Mirrors the page-table-soundness portion of super::VmStore::structural_inv (the kernel PT relates to the region map via PageTableOwner::metaregion_sound) and adds the per-area range well-formedness that [KVirtArea::inv] enforces at the handle level (within the kernel VMALLOC bounds, page-aligned, ordered).

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