Add uvm call for updating cpu limits

internal/schema2/vm_processor_limits.go

@@ -0,0 +1,22 @@
+/*
+ * HCS API
+ *
+ * No description provided (generated by Swagger Codegen https://github.com/swagger-api/swagger-codegen)
+ *
+ * API version: 2.4
+ * Generated by: Swagger Codegen (https://github.com/swagger-api/swagger-codegen.git)
+ */
+
+package hcsschema
+
+// ProcessorLimits is used when modifying processor scheduling limits of a virtual machine.
+type ProcessorLimits struct {
+	// Maximum amount of host CPU resources that the virtual machine can use.
+	Limit uint64 `json:"Limit,omitempty"`
+	// Value describing the relative priority of this virtual machine compared to other virtual machines.
+	Weight uint64 `json:"Weight,omitempty"`
+	// Minimum amount of host CPU resources that the virtual machine is guaranteed.
+	Reservation uint64 `json:"Reservation,omitempty"`
+	// Provides the target maximum CPU frequency, in MHz, for a virtual machine.
+	MaximumFrequencyMHz uint32 `json:"MaximumFrequencyMHz,omitempty"`
+}

internal/uvm/cpulimits_update.go

@@ -0,0 +1,17 @@
+package uvm
+
+import (
+	"context"
+
+	hcsschema "github.com/Microsoft/hcsshim/internal/schema2"
+)
+
+// UpdateCPULimits updates the CPU limits of the utility vm
+func (uvm *UtilityVM) UpdateCPULimits(ctx context.Context, limits *hcsschema.ProcessorLimits) error {
+	req := &hcsschema.ModifySettingRequest{
+		ResourcePath: cpuLimitsResourcePath,
+		Settings:     limits,
+	}
+
+	return uvm.modify(ctx, req)
+}

internal/uvm/resourcepaths.go

@@ -3,9 +3,10 @@ package uvm
 const (
 	gpuResourcePath                  string = "VirtualMachine/ComputeTopology/Gpu"
 	memoryResourcePath               string = "VirtualMachine/ComputeTopology/Memory/SizeInMB"
-	cpuGroupResourceFormat           string = "VirtualMachine/ComputeTopology/Processor/CpuGroup/%s"
+	cpuGroupResourcePath             string = "VirtualMachine/ComputeTopology/Processor/CpuGroup"
 	idledResourcePath                string = "VirtualMachine/ComputeTopology/Processor/IdledProcessors"
 	cpuFrequencyPowerCapResourcePath string = "VirtualMachine/ComputeTopology/Processor/CpuFrequencyPowerCap"
+	cpuLimitsResourcePath            string = "VirtualMachine/ComputeTopology/Processor/Limits"
 	serialResourceFormat             string = "VirtualMachine/Devices/ComPorts/%d"
 	flexibleIovResourceFormat        string = "VirtualMachine/Devices/FlexibleIov/%s"
 	licensingResourcePath            string = "VirtualMachine/Devices/Licensing"