virtcontainers: change memory_offset to uint64

`memory_offset` is used to increase the maximum amount of memory
supported in a VM, this offset is equal to the NVDIMM/PMEM device that
is hot added, in real use case workloads such devices are bigger than
4G, which is the current limit (uint32).

fixes #2006

Signed-off-by: Julio Montes <julio.montes@intel.com>

src/runtime/virtcontainers/hypervisor.go

@@ -242,7 +242,7 @@ type HypervisorConfig struct {
 	MemSlots uint32
 
 	// MemOffset specifies memory space for nvdimm device
-	MemOffset uint32
+	MemOffset uint64
 
 	// VirtioFSCacheSize is the DAX cache size in MiB
 	VirtioFSCacheSize uint32

src/runtime/virtcontainers/persist/api/config.go

@@ -33,7 +33,7 @@ type HypervisorConfig struct {
 	MemSlots uint32
 
 	// MemOffset specifies memory space for nvdimm device
-	MemOffset uint32
+	MemOffset uint64
 
 	// VirtioFSCacheSize is the DAX cache size in MiB
 	VirtioFSCacheSize uint32

src/runtime/virtcontainers/pkg/oci/utils.go

@@ -576,13 +576,13 @@ func addHypervisorMemoryOverrides(ocispec specs.Spec, sbConfig *vc.SandboxConfig
 	}
 
 	if value, ok := ocispec.Annotations[vcAnnotations.MemOffset]; ok {
-		moffset, err := strconv.ParseUint(value, 10, 32)
+		moffset, err := strconv.ParseUint(value, 10, 64)
 		if err != nil {
 			return fmt.Errorf("Error parsing annotation for memory_offset: %v, please specify positive numeric value", err)
 		}
 
 		if moffset > 0 {
-			sbConfig.HypervisorConfig.MemOffset = uint32(moffset)
+			sbConfig.HypervisorConfig.MemOffset = moffset
 		}
 	}
 

src/runtime/virtcontainers/pkg/oci/utils_test.go

@@ -870,7 +870,7 @@ func TestAddHypervisorAnnotations(t *testing.T) {
 	assert.Equal(config.HypervisorConfig.DefaultMaxVCPUs, uint32(1))
 	assert.Equal(config.HypervisorConfig.MemorySize, uint32(1024))
 	assert.Equal(config.HypervisorConfig.MemSlots, uint32(20))
-	assert.Equal(config.HypervisorConfig.MemOffset, uint32(512))
+	assert.Equal(config.HypervisorConfig.MemOffset, uint64(512))
 	assert.Equal(config.HypervisorConfig.VirtioMem, true)
 	assert.Equal(config.HypervisorConfig.MemPrealloc, true)
 	assert.Equal(config.HypervisorConfig.Mlock, false)

src/runtime/virtcontainers/qemu.go

@@ -2116,12 +2116,12 @@ func genericBridges(number uint32, machineType string) []types.Bridge {
 }
 
 // nolint: unused, deadcode
-func genericMemoryTopology(memoryMb, hostMemoryMb uint64, slots uint8, memoryOffset uint32) govmmQemu.Memory {
+func genericMemoryTopology(memoryMb, hostMemoryMb uint64, slots uint8, memoryOffset uint64) govmmQemu.Memory {
 	// image NVDIMM device needs memory space 1024MB
 	// See https://github.com/clearcontainers/runtime/issues/380
 	memoryOffset += 1024
 
-	memMax := fmt.Sprintf("%dM", hostMemoryMb+uint64(memoryOffset))
+	memMax := fmt.Sprintf("%dM", hostMemoryMb+memoryOffset)
 
 	mem := fmt.Sprintf("%dM", memoryMb)
 

src/runtime/virtcontainers/qemu_amd64_test.go

@@ -109,7 +109,7 @@ func TestQemuAmd64CPUModel(t *testing.T) {
 func TestQemuAmd64MemoryTopology(t *testing.T) {
 	assert := assert.New(t)
 	amd64 := newTestQemu(assert, QemuPC)
-	memoryOffset := 1024
+	memoryOffset := uint64(1024)
 
 	hostMem := uint64(100)
 	mem := uint64(120)
@@ -117,7 +117,7 @@ func TestQemuAmd64MemoryTopology(t *testing.T) {
 	expectedMemory := govmmQemu.Memory{
 		Size:   fmt.Sprintf("%dM", mem),
 		Slots:  slots,
-		MaxMem: fmt.Sprintf("%dM", hostMem+uint64(memoryOffset)),
+		MaxMem: fmt.Sprintf("%dM", hostMem+memoryOffset),
 	}
 
 	m := amd64.memoryTopology(mem, hostMem, slots)

src/runtime/virtcontainers/qemu_arch_base.go

@@ -177,7 +177,7 @@ const (
 type qemuArchBase struct {
 	qemuMachine          govmmQemu.Machine
 	qemuExePath          string
-	memoryOffset         uint32
+	memoryOffset         uint64
 	nestedRun            bool
 	vhost                bool
 	disableNvdimm        bool