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Machine queue, 2019-03-11 

* memfd fixes (Ilya Maximets)
 * Move nvdimms state into struct MachineState (Eric Auger)
 * hostmem-file: reject invalid pmem file sizes (Stefan Hajnoczi)
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Merge remote-tracking branch 'remotes/ehabkost/tags/machine-next-pull-request' into staging

Machine queue, 2019-03-11

* memfd fixes (Ilya Maximets)
* Move nvdimms state into struct MachineState (Eric Auger)
* hostmem-file: reject invalid pmem file sizes (Stefan Hajnoczi)

# gpg: Signature made Tue 12 Mar 2019 00:57:41 GMT
# gpg:                using RSA key 2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>" [full]
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/machine-next-pull-request:
  memfd: improve error messages
  memfd: set up correct errno if not supported
  memfd: always check for MFD_CLOEXEC
  hostmem-memfd: disable for systems without sealing support
  machine: Move nvdimms state into struct MachineState
  nvdimm: Rename AcpiNVDIMMState into NVDIMMState
  hostmem-file: reject invalid pmem file sizes

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-03-12 15:25:46 +00:00
parent 46316f1dff edaed6c711
commit 2cb73afa6a
16 changed files with 206 additions and 91 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
backends/hostmem-file.c
View File

@ -56,6 +56,29 @@ file_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
error_setg(errp, "mem-path property not set");
return;
}
/*
* Verify pmem file size since starting a guest with an incorrect size
* leads to confusing failures inside the guest.
*/
if (fb->is_pmem) {
Error *local_err = NULL;
uint64_t size;
size = qemu_get_pmem_size(fb->mem_path, &local_err);
if (!size) {
error_propagate(errp, local_err);
return;
}
if (backend->size > size) {
error_setg(errp, "size property %" PRIu64 " is larger than "
"pmem file \"%s\" size %" PRIu64, backend->size,
fb->mem_path, size);
return;
}
}
backend->force_prealloc = mem_prealloc;
name = host_memory_backend_get_name(backend);
memory_region_init_ram_from_file(&backend->mr, OBJECT(backend),

18
backends/hostmem-memfd.c
View File

@ -154,15 +154,13 @@ memfd_backend_class_init(ObjectClass *oc, void *data)
"Huge pages size (ex: 2M, 1G)",
&error_abort);
}
if (qemu_memfd_check(MFD_ALLOW_SEALING)) {
object_class_property_add_bool(oc, "seal",
memfd_backend_get_seal,
memfd_backend_set_seal,
&error_abort);
object_class_property_set_description(oc, "seal",
"Seal growing & shrinking",
&error_abort);
}
object_class_property_add_bool(oc, "seal",
memfd_backend_get_seal,
memfd_backend_set_seal,
&error_abort);
object_class_property_set_description(oc, "seal",
"Seal growing & shrinking",
&error_abort);
}
static const TypeInfo memfd_backend_info = {
@ -175,7 +173,7 @@ static const TypeInfo memfd_backend_info = {
static void register_types(void)
{
if (qemu_memfd_check(0)) {
if (qemu_memfd_check(MFD_ALLOW_SEALING)) {
type_register_static(&memfd_backend_info);
}
}

18
hw/acpi/nvdimm.c
View File

@ -382,7 +382,7 @@ nvdimm_build_structure_caps(GArray *structures, uint32_t capabilities)
nfit_caps->capabilities = cpu_to_le32(capabilities);
}
static GArray *nvdimm_build_device_structure(AcpiNVDIMMState *state)
static GArray *nvdimm_build_device_structure(NVDIMMState *state)
{
GSList *device_list = nvdimm_get_device_list();
GArray *structures = g_array_new(false, true /* clear */, 1);
@ -416,7 +416,7 @@ static void nvdimm_init_fit_buffer(NvdimmFitBuffer *fit_buf)
fit_buf->fit = g_array_new(false, true /* clear */, 1);
}
static void nvdimm_build_fit_buffer(AcpiNVDIMMState *state)
static void nvdimm_build_fit_buffer(NVDIMMState *state)
{
NvdimmFitBuffer *fit_buf = &state->fit_buf;
@ -425,12 +425,12 @@ static void nvdimm_build_fit_buffer(AcpiNVDIMMState *state)
fit_buf->dirty = true;
}
void nvdimm_plug(AcpiNVDIMMState *state)
void nvdimm_plug(NVDIMMState *state)
{
nvdimm_build_fit_buffer(state);
}
static void nvdimm_build_nfit(AcpiNVDIMMState *state, GArray *table_offsets,
static void nvdimm_build_nfit(NVDIMMState *state, GArray *table_offsets,
GArray *table_data, BIOSLinker *linker)
{
NvdimmFitBuffer *fit_buf = &state->fit_buf;
@ -570,7 +570,7 @@ nvdimm_dsm_no_payload(uint32_t func_ret_status, hwaddr dsm_mem_addr)
#define NVDIMM_QEMU_RSVD_HANDLE_ROOT 0x10000
/* Read FIT data, defined in docs/specs/acpi_nvdimm.txt. */
static void nvdimm_dsm_func_read_fit(AcpiNVDIMMState *state, NvdimmDsmIn *in,
static void nvdimm_dsm_func_read_fit(NVDIMMState *state, NvdimmDsmIn *in,
hwaddr dsm_mem_addr)
{
NvdimmFitBuffer *fit_buf = &state->fit_buf;
@ -619,7 +619,7 @@ exit:
}
static void
nvdimm_dsm_handle_reserved_root_method(AcpiNVDIMMState *state,
nvdimm_dsm_handle_reserved_root_method(NVDIMMState *state,
NvdimmDsmIn *in, hwaddr dsm_mem_addr)
{
switch (in->function) {
@ -863,7 +863,7 @@ nvdimm_dsm_read(void *opaque, hwaddr addr, unsigned size)
static void
nvdimm_dsm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
{
AcpiNVDIMMState *state = opaque;
NVDIMMState *state = opaque;
NvdimmDsmIn *in;
hwaddr dsm_mem_addr = val;
@ -925,7 +925,7 @@ void nvdimm_acpi_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev)
}
}
void nvdimm_init_acpi_state(AcpiNVDIMMState *state, MemoryRegion *io,
void nvdimm_init_acpi_state(NVDIMMState *state, MemoryRegion *io,
FWCfgState *fw_cfg, Object *owner)
{
memory_region_init_io(&state->io_mr, owner, &nvdimm_dsm_ops, state,
@ -1319,7 +1319,7 @@ static void nvdimm_build_ssdt(GArray *table_offsets, GArray *table_data,
}
void nvdimm_build_acpi(GArray *table_offsets, GArray *table_data,
BIOSLinker *linker, AcpiNVDIMMState *state,
BIOSLinker *linker, NVDIMMState *state,
uint32_t ram_slots)
{
GSList *device_list;

65
hw/core/machine.c
View File

@ -22,6 +22,7 @@
#include "qemu/error-report.h"
#include "sysemu/qtest.h"
#include "hw/pci/pci.h"
#include "hw/mem/nvdimm.h"
GlobalProperty hw_compat_3_1[] = {
{ "pcie-root-port", "x-speed", "2_5" },
@ -481,6 +482,47 @@ static void machine_set_memory_encryption(Object *obj, const char *value,
ms->memory_encryption = g_strdup(value);
}
static bool machine_get_nvdimm(Object *obj, Error **errp)
{
MachineState *ms = MACHINE(obj);
return ms->nvdimms_state->is_enabled;
}
static void machine_set_nvdimm(Object *obj, bool value, Error **errp)
{
MachineState *ms = MACHINE(obj);
ms->nvdimms_state->is_enabled = value;
}
static char *machine_get_nvdimm_persistence(Object *obj, Error **errp)
{
MachineState *ms = MACHINE(obj);
return g_strdup(ms->nvdimms_state->persistence_string);
}
static void machine_set_nvdimm_persistence(Object *obj, const char *value,
Error **errp)
{
MachineState *ms = MACHINE(obj);
NVDIMMState *nvdimms_state = ms->nvdimms_state;
if (strcmp(value, "cpu") == 0) {
nvdimms_state->persistence = 3;
} else if (strcmp(value, "mem-ctrl") == 0) {
nvdimms_state->persistence = 2;
} else {
error_setg(errp, "-machine nvdimm-persistence=%s: unsupported option",
value);
return;
}
g_free(nvdimms_state->persistence_string);
nvdimms_state->persistence_string = g_strdup(value);
}
void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type)
{
strList *item = g_new0(strList, 1);
@ -791,6 +833,28 @@ static void machine_initfn(Object *obj)
ms->mem_merge = true;
ms->enable_graphics = true;
if (mc->nvdimm_supported) {
Object *obj = OBJECT(ms);
ms->nvdimms_state = g_new0(NVDIMMState, 1);
object_property_add_bool(obj, "nvdimm",
machine_get_nvdimm, machine_set_nvdimm,
&error_abort);
object_property_set_description(obj, "nvdimm",
"Set on/off to enable/disable "
"NVDIMM instantiation", NULL);
object_property_add_str(obj, "nvdimm-persistence",
machine_get_nvdimm_persistence,
machine_set_nvdimm_persistence,
&error_abort);
object_property_set_description(obj, "nvdimm-persistence",
"Set NVDIMM persistence"
"Valid values are cpu, mem-ctrl",
NULL);
}
/* Register notifier when init is done for sysbus sanity checks */
ms->sysbus_notifier.notify = machine_init_notify;
qemu_add_machine_init_done_notifier(&ms->sysbus_notifier);
@ -809,6 +873,7 @@ static void machine_finalize(Object *obj)
g_free(ms->dt_compatible);
g_free(ms->firmware);
g_free(ms->device_memory);
g_free(ms->nvdimms_state);
}
bool machine_usb(MachineState *machine)

6
hw/i386/acpi-build.c
View File

@ -1867,7 +1867,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
aml_append(scope, method);
}
if (pcms->acpi_nvdimm_state.is_enabled) {
if (machine->nvdimms_state->is_enabled) {
method = aml_method("_E04", 0, AML_NOTSERIALIZED);
aml_append(method, aml_notify(aml_name("\\_SB.NVDR"),
aml_int(0x80)));
@ -2704,9 +2704,9 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
build_dmar_q35(tables_blob, tables->linker);
}
}
if (pcms->acpi_nvdimm_state.is_enabled) {
if (machine->nvdimms_state->is_enabled) {
nvdimm_build_acpi(table_offsets, tables_blob, tables->linker,
&pcms->acpi_nvdimm_state, machine->ram_slots);
machine->nvdimms_state, machine->ram_slots);
}
/* Add tables supplied by user (if any) */

57
hw/i386/pc.c
View File

@ -2075,6 +2075,7 @@ static void pc_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
{
const PCMachineState *pcms = PC_MACHINE(hotplug_dev);
const PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
const MachineState *ms = MACHINE(hotplug_dev);
const bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
const uint64_t legacy_align = TARGET_PAGE_SIZE;
@ -2089,7 +2090,7 @@ static void pc_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
return;
}
if (is_nvdimm && !pcms->acpi_nvdimm_state.is_enabled) {
if (is_nvdimm && !ms->nvdimms_state->is_enabled) {
error_setg(errp, "nvdimm is not enabled: missing 'nvdimm' in '-M'");
return;
}
@ -2103,6 +2104,7 @@ static void pc_memory_plug(HotplugHandler *hotplug_dev,
{
Error *local_err = NULL;
PCMachineState *pcms = PC_MACHINE(hotplug_dev);
MachineState *ms = MACHINE(hotplug_dev);
bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
pc_dimm_plug(PC_DIMM(dev), MACHINE(pcms), &local_err);
@ -2111,7 +2113,7 @@ static void pc_memory_plug(HotplugHandler *hotplug_dev,
}
if (is_nvdimm) {
nvdimm_plug(&pcms->acpi_nvdimm_state);
nvdimm_plug(ms->nvdimms_state);
}
hotplug_handler_plug(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &error_abort);
@ -2552,47 +2554,6 @@ static void pc_machine_set_smm(Object *obj, Visitor *v, const char *name,
visit_type_OnOffAuto(v, name, &pcms->smm, errp);
}
static bool pc_machine_get_nvdimm(Object *obj, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
return pcms->acpi_nvdimm_state.is_enabled;
}
static void pc_machine_set_nvdimm(Object *obj, bool value, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
pcms->acpi_nvdimm_state.is_enabled = value;
}
static char *pc_machine_get_nvdimm_persistence(Object *obj, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
return g_strdup(pcms->acpi_nvdimm_state.persistence_string);
}
static void pc_machine_set_nvdimm_persistence(Object *obj, const char *value,
Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
AcpiNVDIMMState *nvdimm_state = &pcms->acpi_nvdimm_state;
if (strcmp(value, "cpu") == 0)
nvdimm_state->persistence = 3;
else if (strcmp(value, "mem-ctrl") == 0)
nvdimm_state->persistence = 2;
else {
error_setg(errp, "-machine nvdimm-persistence=%s: unsupported option",
value);
return;
}
g_free(nvdimm_state->persistence_string);
nvdimm_state->persistence_string = g_strdup(value);
}
static bool pc_machine_get_smbus(Object *obj, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
@ -2642,8 +2603,6 @@ static void pc_machine_initfn(Object *obj)
pcms->max_ram_below_4g = 0; /* use default */
pcms->smm = ON_OFF_AUTO_AUTO;
pcms->vmport = ON_OFF_AUTO_AUTO;
/* nvdimm is disabled on default. */
pcms->acpi_nvdimm_state.is_enabled = false;
/* acpi build is enabled by default if machine supports it */
pcms->acpi_build_enabled = PC_MACHINE_GET_CLASS(pcms)->has_acpi_build;
pcms->smbus_enabled = true;
@ -2782,6 +2741,7 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
hc->unplug = pc_machine_device_unplug_cb;
nc->nmi_monitor_handler = x86_nmi;
mc->default_cpu_type = TARGET_DEFAULT_CPU_TYPE;
mc->nvdimm_supported = true;
object_class_property_add(oc, PC_MACHINE_DEVMEM_REGION_SIZE, "int",
pc_machine_get_device_memory_region_size, NULL,
@ -2806,13 +2766,6 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
object_class_property_set_description(oc, PC_MACHINE_VMPORT,
"Enable vmport (pc & q35)", &error_abort);
object_class_property_add_bool(oc, PC_MACHINE_NVDIMM,
pc_machine_get_nvdimm, pc_machine_set_nvdimm, &error_abort);
object_class_property_add_str(oc, PC_MACHINE_NVDIMM_PERSIST,
pc_machine_get_nvdimm_persistence,
pc_machine_set_nvdimm_persistence, &error_abort);
object_class_property_add_bool(oc, PC_MACHINE_SMBUS,
pc_machine_get_smbus, pc_machine_set_smbus, &error_abort);

4
hw/i386/pc_piix.c
View File

@ -297,8 +297,8 @@ static void pc_init1(MachineState *machine,
PC_MACHINE_ACPI_DEVICE_PROP, &error_abort);
}
if (pcms->acpi_nvdimm_state.is_enabled) {
nvdimm_init_acpi_state(&pcms->acpi_nvdimm_state, system_io,
if (machine->nvdimms_state->is_enabled) {
nvdimm_init_acpi_state(machine->nvdimms_state, system_io,
pcms->fw_cfg, OBJECT(pcms));
}
}

4
hw/i386/pc_q35.c
View File

@ -329,8 +329,8 @@ static void pc_q35_init(MachineState *machine)
pc_vga_init(isa_bus, host_bus);
pc_nic_init(pcmc, isa_bus, host_bus);
if (pcms->acpi_nvdimm_state.is_enabled) {
nvdimm_init_acpi_state(&pcms->acpi_nvdimm_state, system_io,
if (machine->nvdimms_state->is_enabled) {
nvdimm_init_acpi_state(machine->nvdimms_state, system_io,
pcms->fw_cfg, OBJECT(pcms));
}
}

2
include/hw/boards.h
View File

@ -210,6 +210,7 @@ struct MachineClass {
int nb_nodes, ram_addr_t size);
bool ignore_boot_device_suffixes;
bool smbus_no_migration_support;
bool nvdimm_supported;
HotplugHandler *(*get_hotplug_handler)(MachineState *machine,
DeviceState *dev);
@ -272,6 +273,7 @@ struct MachineState {
const char *cpu_type;
AccelState *accelerator;
CPUArchIdList *possible_cpus;
struct NVDIMMState *nvdimms_state;
};
#define DEFINE_MACHINE(namestr, machine_initfn) \

4
include/hw/i386/pc.h
View File

@ -47,8 +47,6 @@ struct PCMachineState {
OnOffAuto vmport;
OnOffAuto smm;
AcpiNVDIMMState acpi_nvdimm_state;
bool acpi_build_enabled;
bool smbus_enabled;
bool sata_enabled;
@ -76,8 +74,6 @@ struct PCMachineState {
#define PC_MACHINE_MAX_RAM_BELOW_4G "max-ram-below-4g"
#define PC_MACHINE_VMPORT "vmport"
#define PC_MACHINE_SMM "smm"
#define PC_MACHINE_NVDIMM "nvdimm"
#define PC_MACHINE_NVDIMM_PERSIST "nvdimm-persistence"
#define PC_MACHINE_SMBUS "smbus"
#define PC_MACHINE_SATA "sata"
#define PC_MACHINE_PIT "pit"

10
include/hw/mem/nvdimm.h
View File

@ -123,7 +123,7 @@ struct NvdimmFitBuffer {
};
typedef struct NvdimmFitBuffer NvdimmFitBuffer;
struct AcpiNVDIMMState {
struct NVDIMMState {
/* detect if NVDIMM support is enabled. */
bool is_enabled;
@ -141,13 +141,13 @@ struct AcpiNVDIMMState {
int32_t persistence;
char *persistence_string;
};
typedef struct AcpiNVDIMMState AcpiNVDIMMState;
typedef struct NVDIMMState NVDIMMState;
void nvdimm_init_acpi_state(AcpiNVDIMMState *state, MemoryRegion *io,
void nvdimm_init_acpi_state(NVDIMMState *state, MemoryRegion *io,
FWCfgState *fw_cfg, Object *owner);
void nvdimm_build_acpi(GArray *table_offsets, GArray *table_data,
BIOSLinker *linker, AcpiNVDIMMState *state,
BIOSLinker *linker, NVDIMMState *state,
uint32_t ram_slots);
void nvdimm_plug(AcpiNVDIMMState *state);
void nvdimm_plug(NVDIMMState *state);
void nvdimm_acpi_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev);
#endif

13
include/qemu/osdep.h
View File

@ -570,6 +570,19 @@ void qemu_set_tty_echo(int fd, bool echo);
void os_mem_prealloc(int fd, char *area, size_t sz, int smp_cpus,
Error **errp);
/**
* qemu_get_pmem_size:
* @filename: path to a pmem file
* @errp: pointer to a NULL-initialized error object
*
* Determine the size of a persistent memory file. Besides supporting files on
* DAX file systems, this function also supports Linux devdax character
* devices.
*
* Returns: the size or 0 on failure
*/
uint64_t qemu_get_pmem_size(const char *filename, Error **errp);
/**
* qemu_get_pid_name:
* @pid: pid of a process

5
tests/vhost-user-test.c
View File

@ -178,7 +178,8 @@ static void append_mem_opts(TestServer *server, GString *cmd_line,
int size, enum test_memfd memfd)
{
if (memfd == TEST_MEMFD_AUTO) {
memfd = qemu_memfd_check(0) ? TEST_MEMFD_YES : TEST_MEMFD_NO;
memfd = qemu_memfd_check(MFD_ALLOW_SEALING) ? TEST_MEMFD_YES
: TEST_MEMFD_NO;
}
if (memfd == TEST_MEMFD_YES) {
@ -930,7 +931,7 @@ static void register_vhost_user_test(void)
"virtio-net",
test_read_guest_mem, &opts);
if (qemu_memfd_check(0)) {
if (qemu_memfd_check(MFD_ALLOW_SEALING)) {
opts.before = vhost_user_test_setup_memfd;
qos_add_test("vhost-user/read-guest-mem/memfd",
"virtio-net",

10
util/memfd.c
View File

@ -40,6 +40,7 @@ static int memfd_create(const char *name, unsigned int flags)
#ifdef __NR_memfd_create
return syscall(__NR_memfd_create, name, flags);
#else
errno = ENOSYS;
return -1;
#endif
}
@ -70,14 +71,18 @@ int qemu_memfd_create(const char *name, size_t size, bool hugetlb,
}
mfd = memfd_create(name, flags);
if (mfd < 0) {
error_setg_errno(errp, errno,
"failed to create memfd with flags 0x%x", flags);
goto err;
}
if (ftruncate(mfd, size) == -1) {
error_setg_errno(errp, errno, "failed to resize memfd to %zu", size);
goto err;
}
if (seals && fcntl(mfd, F_ADD_SEALS, seals) == -1) {
error_setg_errno(errp, errno, "failed to add seals 0x%x", seals);
goto err;
}
@ -87,8 +92,9 @@ err:
if (mfd >= 0) {
close(mfd);
}
#else
error_setg_errno(errp, ENOSYS, "failed to create memfd");
#endif
error_setg_errno(errp, errno, "failed to create memfd");
return -1;
}
@ -188,7 +194,7 @@ bool qemu_memfd_alloc_check(void)
bool qemu_memfd_check(unsigned int flags)
{
#ifdef CONFIG_LINUX
int mfd = memfd_create("test", flags);
int mfd = memfd_create("test", flags | MFD_CLOEXEC);
if (mfd >= 0) {
close(mfd);

53
util/oslib-posix.c
View File

@ -512,6 +512,59 @@ void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
}
}
uint64_t qemu_get_pmem_size(const char *filename, Error **errp)
{
struct stat st;
if (stat(filename, &st) < 0) {
error_setg(errp, "unable to stat pmem file \"%s\"", filename);
return 0;
}
#if defined(__linux__)
/* Special handling for devdax character devices */
if (S_ISCHR(st.st_mode)) {
char *subsystem_path = NULL;
char *subsystem = NULL;
char *size_path = NULL;
char *size_str = NULL;
uint64_t ret = 0;
subsystem_path = g_strdup_printf("/sys/dev/char/%d:%d/subsystem",
major(st.st_rdev), minor(st.st_rdev));
subsystem = g_file_read_link(subsystem_path, NULL);
if (!subsystem) {
error_setg(errp, "unable to read subsystem for pmem file \"%s\"",
filename);
goto devdax_err;
}
if (!g_str_has_suffix(subsystem, "/dax")) {
error_setg(errp, "pmem file \"%s\" is not a dax device", filename);
goto devdax_err;
}
size_path = g_strdup_printf("/sys/dev/char/%d:%d/size",
major(st.st_rdev), minor(st.st_rdev));
if (!g_file_get_contents(size_path, &size_str, NULL, NULL)) {
error_setg(errp, "unable to read size for pmem file \"%s\"",
size_path);
goto devdax_err;
}
ret = g_ascii_strtoull(size_str, NULL, 0);
devdax_err:
g_free(size_str);
g_free(size_path);
g_free(subsystem);
g_free(subsystem_path);
return ret;
}
#endif /* defined(__linux__) */
return st.st_size;
}
char *qemu_get_pid_name(pid_t pid)
{

5
util/oslib-win32.c
View File

@ -560,6 +560,11 @@ void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
}
}
uint64_t qemu_get_pmem_size(const char *filename, Error **errp)
{
error_setg(errp, "pmem support not available");
return 0;
}
char *qemu_get_pid_name(pid_t pid)
{