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// Copyright 2019 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package kvm
// Get all read-only physicalRegions.
func rdonlyRegionsForSetMem() (phyRegions []physicalRegion) {
var rdonlyRegions []region
applyVirtualRegions(func(vr virtualRegion) {
if excludeVirtualRegion(vr) {
return
}
if !vr.accessType.Write && vr.accessType.Read {
rdonlyRegions = append(rdonlyRegions, vr.region)
}
})
for _, r := range rdonlyRegions {
physical, _, ok := translateToPhysical(r.virtual)
if !ok {
continue
}
phyRegions = append(phyRegions, physicalRegion{
region: region{
virtual: r.virtual,
length: r.length,
},
physical: physical,
})
}
return phyRegions
}
// Get all available physicalRegions.
func availableRegionsForSetMem() (phyRegions []physicalRegion) {
var excludeRegions []region
applyVirtualRegions(func(vr virtualRegion) {
if !vr.accessType.Write {
excludeRegions = append(excludeRegions, vr.region)
}
})
phyRegions = computePhysicalRegions(excludeRegions)
return phyRegions
}
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