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Merge tag 'hw-misc-20240425' of https://github.com/philmd/qemu into staging

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Misc HW patch queue

- Script to compare machines compat_props[] (Maksim)
- Introduce 'module' CPU topology level (Zhao)
- Various cleanups (Thomas, Zhao, Inès, Bernhard)

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* tag 'hw-misc-20240425' of https://github.com/philmd/qemu: (22 commits)
  hw/core: Support module-id in numa configuration
  hw/core: Introduce module-id as the topology subindex
  hw/core/machine: Support modules in -smp
  hw/core/machine: Introduce the module as a CPU topology level
  hw/i386/pc_sysfw: Remove unused parameter from pc_isa_bios_init()
  hw/misc : Correct 5 spaces indents in stm32l4x5_exti
  hw/xtensa: Include missing 'exec/cpu-common.h' in 'bootparam.h'
  hw/elf_ops: Rename elf_ops.h -> elf_ops.h.inc
  hw/cxl/cxl-cdat: Make cxl_doe_cdat_init() return boolean
  hw/cxl/cxl-cdat: Make ct3_build_cdat() return boolean
  hw/cxl/cxl-cdat: Make ct3_load_cdat() return boolean
  hw: Add a Kconfig switch for the TYPE_CPU_CLUSTER device
  hw: Fix problem with the A*MPCORE switches in the Kconfig files
  hw/riscv/virt: Replace sprintf by g_strdup_printf
  hw/misc/imx: Replace sprintf() by snprintf()
  hw/misc/applesmc: Simplify DeviceReset handler
  target/i386: Move APIC related code to cpu-apic.c
  hw/core: Remove check on NEED_CPU_H in tcg-cpu-ops.h
  scripts: add script to compare compatibility properties
  python/qemu/machine: add method to retrieve QEMUMachine::binary field
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2024-04-25 09:43:29 -07:00
parent 83baec642a 098de99aad
commit a118c4aff4
43 changed files with 858 additions and 197 deletions
Download Patch File Download Diff File Expand all files Collapse all files
MAINTAINERS
+5
View File
@@ -4230,3 +4230,8 @@ Code Coverage Tools
M: Alex Bennée <alex.bennee@linaro.org>
S: Odd Fixes
F: scripts/coverage/
Machine development tool
M: Maksim Davydov <davydov-max@yandex-team.ru>
S: Supported
F: scripts/compare-machine-types.py
bsd-user/elfload.c
+1 -1
View File
@@ -383,7 +383,7 @@ static const char *lookup_symbolxx(struct syminfo *s, uint64_t orig_addr)
return "";
}
/* FIXME: This should use elf_ops.h */
/* FIXME: This should use elf_ops.h.inc */
static int symcmp(const void *s0, const void *s1)
{
struct elf_sym *sym0 = (struct elf_sym *)s0;
hw/Kconfig
+1
View File
@@ -47,6 +47,7 @@ source watchdog/Kconfig
# arch Kconfig
source arm/Kconfig
source cpu/Kconfig
source alpha/Kconfig
source avr/Kconfig
source cris/Kconfig
hw/arm/Kconfig
+3 -15
View File
@@ -486,6 +486,7 @@ config XLNX_ZYNQMP_ARM
select AHCI
select ARM_GIC
select CADENCE
select CPU_CLUSTER
select DDC
select DPCD
select SDHCI
@@ -504,6 +505,7 @@ config XLNX_VERSAL
default y
depends on TCG && AARCH64
select ARM_GIC
select CPU_CLUSTER
select PL011
select CADENCE
select VIRTIO_MMIO
@@ -679,21 +681,6 @@ config ZAURUS
select NAND
select ECC
config A9MPCORE
bool
select A9_GTIMER
select A9SCU # snoop control unit
select ARM_GIC
select ARM_MPTIMER
config A15MPCORE
bool
select ARM_GIC
config ARM11MPCORE
bool
select ARM11SCU
config ARMSSE
bool
select ARM_V7M
@@ -704,6 +691,7 @@ config ARMSSE
select CMSDK_APB_DUALTIMER
select CMSDK_APB_UART
select CMSDK_APB_WATCHDOG
select CPU_CLUSTER
select IOTKIT_SECCTL
select IOTKIT_SYSCTL
select IOTKIT_SYSINFO
hw/core/loader.c
+2 -2
View File
@@ -305,7 +305,7 @@ static void *load_at(int fd, off_t offset, size_t size)
#define elf_word uint32_t
#define elf_sword int32_t
#define bswapSZs bswap32s
#include "hw/elf_ops.h"
#include "hw/elf_ops.h.inc"
#undef elfhdr
#undef elf_phdr
@@ -327,7 +327,7 @@ static void *load_at(int fd, off_t offset, size_t size)
#define elf_sword int64_t
#define bswapSZs bswap64s
#define SZ 64
#include "hw/elf_ops.h"
#include "hw/elf_ops.h.inc"
const char *load_elf_strerror(ssize_t error)
{
hw/core/machine-hmp-cmds.c
+4
View File
@@ -87,6 +87,10 @@ void hmp_hotpluggable_cpus(Monitor *mon, const QDict *qdict)
monitor_printf(mon, " cluster-id: \"%" PRIu64 "\"\n",
c->cluster_id);
}
if (c->has_module_id) {
monitor_printf(mon, " module-id: \"%" PRIu64 "\"\n",
c->module_id);
}
if (c->has_core_id) {
monitor_printf(mon, " core-id: \"%" PRIu64 "\"\n", c->core_id);
}
hw/core/machine-qmp-cmds.c
+22 -1
View File
@@ -64,7 +64,8 @@ CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
return head;
}
MachineInfoList *qmp_query_machines(Error **errp)
MachineInfoList *qmp_query_machines(bool has_compat_props, bool compat_props,
Error **errp)
{
GSList *el, *machines = object_class_get_list(TYPE_MACHINE, false);
MachineInfoList *mach_list = NULL;
@@ -96,6 +97,26 @@ MachineInfoList *qmp_query_machines(Error **errp)
info->default_ram_id = g_strdup(mc->default_ram_id);
}
if (compat_props && mc->compat_props) {
int i;
info->compat_props = NULL;
CompatPropertyList **tail = &(info->compat_props);
info->has_compat_props = true;
for (i = 0; i < mc->compat_props->len; i++) {
GlobalProperty *mt_prop = g_ptr_array_index(mc->compat_props,
i);
CompatProperty *prop;
prop = g_malloc0(sizeof(*prop));
prop->qom_type = g_strdup(mt_prop->driver);
prop->property = g_strdup(mt_prop->property);
prop->value = g_strdup(mt_prop->value);
QAPI_LIST_APPEND(tail, prop);
}
}
QAPI_LIST_PREPEND(mach_list, info);
}
hw/core/machine-smp.c
+34 -7
View File
@@ -51,6 +51,10 @@ static char *cpu_hierarchy_to_string(MachineState *ms)
g_string_append_printf(s, " * clusters (%u)", ms->smp.clusters);
}
if (mc->smp_props.modules_supported) {
g_string_append_printf(s, " * modules (%u)", ms->smp.modules);
}
g_string_append_printf(s, " * cores (%u)", ms->smp.cores);
g_string_append_printf(s, " * threads (%u)", ms->smp.threads);
@@ -88,6 +92,7 @@ void machine_parse_smp_config(MachineState *ms,
unsigned sockets = config->has_sockets ? config->sockets : 0;
unsigned dies = config->has_dies ? config->dies : 0;
unsigned clusters = config->has_clusters ? config->clusters : 0;
unsigned modules = config->has_modules ? config->modules : 0;
unsigned cores = config->has_cores ? config->cores : 0;
unsigned threads = config->has_threads ? config->threads : 0;
unsigned maxcpus = config->has_maxcpus ? config->maxcpus : 0;
@@ -103,6 +108,7 @@ void machine_parse_smp_config(MachineState *ms,
(config->has_sockets && config->sockets == 0) ||
(config->has_dies && config->dies == 0) ||
(config->has_clusters && config->clusters == 0) ||
(config->has_modules && config->modules == 0) ||
(config->has_cores && config->cores == 0) ||
(config->has_threads && config->threads == 0) ||
(config->has_maxcpus && config->maxcpus == 0)) {
@@ -115,6 +121,20 @@ void machine_parse_smp_config(MachineState *ms,
* If not supported by the machine, a topology parameter must be
* omitted.
*/
if (!mc->smp_props.modules_supported && config->has_modules) {
if (config->modules > 1) {
error_setg(errp, "modules not supported by this "
"machine's CPU topology");
return;
} else {
/* Here modules only equals 1 since we've checked zero case. */
warn_report("Deprecated CPU topology (considered invalid): "
"Unsupported modules parameter mustn't be "
"specified as 1");
}
}
modules = modules > 0 ? modules : 1;
if (!mc->smp_props.clusters_supported && config->has_clusters) {
if (config->clusters > 1) {
error_setg(errp, "clusters not supported by this "
@@ -185,11 +205,13 @@ void machine_parse_smp_config(MachineState *ms,
cores = cores > 0 ? cores : 1;
threads = threads > 0 ? threads : 1;
sockets = maxcpus /
(drawers * books * dies * clusters * cores * threads);
(drawers * books * dies * clusters *
modules * cores * threads);
} else if (cores == 0) {
threads = threads > 0 ? threads : 1;
cores = maxcpus /
(drawers * books * sockets * dies * clusters * threads);
(drawers * books * sockets * dies *
clusters * modules * threads);
}
} else {
/* prefer cores over sockets since 6.2 */
@@ -197,22 +219,26 @@ void machine_parse_smp_config(MachineState *ms,
sockets = sockets > 0 ? sockets : 1;
threads = threads > 0 ? threads : 1;
cores = maxcpus /
(drawers * books * sockets * dies * clusters * threads);
(drawers * books * sockets * dies *
clusters * modules * threads);
} else if (sockets == 0) {
threads = threads > 0 ? threads : 1;
sockets = maxcpus /
(drawers * books * dies * clusters * cores * threads);
(drawers * books * dies * clusters *
modules * cores * threads);
}
}
/* try to calculate omitted threads at last */
if (threads == 0) {
threads = maxcpus /
(drawers * books * sockets * dies * clusters * cores);
(drawers * books * sockets * dies *
clusters * modules * cores);
}
}
total_cpus = drawers * books * sockets * dies * clusters * cores * threads;
total_cpus = drawers * books * sockets * dies *
clusters * modules * cores * threads;
maxcpus = maxcpus > 0 ? maxcpus : total_cpus;
cpus = cpus > 0 ? cpus : maxcpus;
@@ -222,6 +248,7 @@ void machine_parse_smp_config(MachineState *ms,
ms->smp.sockets = sockets;
ms->smp.dies = dies;
ms->smp.clusters = clusters;
ms->smp.modules = modules;
ms->smp.cores = cores;
ms->smp.threads = threads;
ms->smp.max_cpus = maxcpus;
@@ -266,7 +293,7 @@ void machine_parse_smp_config(MachineState *ms,
unsigned int machine_topo_get_cores_per_socket(const MachineState *ms)
{
return ms->smp.cores * ms->smp.clusters * ms->smp.dies;
return ms->smp.cores * ms->smp.modules * ms->smp.clusters * ms->smp.dies;
}
unsigned int machine_topo_get_threads_per_socket(const MachineState *ms)
hw/core/machine.c
+18
View File
@@ -800,6 +800,11 @@ void machine_set_cpu_numa_node(MachineState *machine,
return;
}
if (props->has_module_id && !slot->props.has_module_id) {
error_setg(errp, "module-id is not supported");
return;
}
if (props->has_cluster_id && !slot->props.has_cluster_id) {
error_setg(errp, "cluster-id is not supported");
return;
@@ -824,6 +829,11 @@ void machine_set_cpu_numa_node(MachineState *machine,
continue;
}
if (props->has_module_id &&
props->module_id != slot->props.module_id) {
continue;
}
if (props->has_cluster_id &&
props->cluster_id != slot->props.cluster_id) {
continue;
@@ -881,6 +891,7 @@ static void machine_get_smp(Object *obj, Visitor *v, const char *name,
.has_sockets = true, .sockets = ms->smp.sockets,
.has_dies = true, .dies = ms->smp.dies,
.has_clusters = true, .clusters = ms->smp.clusters,
.has_modules = true, .modules = ms->smp.modules,
.has_cores = true, .cores = ms->smp.cores,
.has_threads = true, .threads = ms->smp.threads,
.has_maxcpus = true, .maxcpus = ms->smp.max_cpus,
@@ -1157,6 +1168,7 @@ static void machine_initfn(Object *obj)
ms->smp.sockets = 1;
ms->smp.dies = 1;
ms->smp.clusters = 1;
ms->smp.modules = 1;
ms->smp.cores = 1;
ms->smp.threads = 1;
@@ -1224,6 +1236,12 @@ static char *cpu_slot_to_string(const CPUArchId *cpu)
}
g_string_append_printf(s, "cluster-id: %"PRId64, cpu->props.cluster_id);
}
if (cpu->props.has_module_id) {
if (s->len) {
g_string_append_printf(s, ", ");
}
g_string_append_printf(s, "module-id: %"PRId64, cpu->props.module_id);
}
if (cpu->props.has_core_id) {
if (s->len) {
g_string_append_printf(s, ", ");
hw/cpu/Kconfig
+12 -3
View File
@@ -1,8 +1,17 @@
config ARM11MPCORE
bool
config A9MPCORE
bool
select A9_GTIMER
select A9SCU # snoop control unit
select ARM_GIC
select ARM_MPTIMER
config A15MPCORE
bool
select ARM_GIC
config ARM11MPCORE
bool
select ARM11SCU
config CPU_CLUSTER
bool
hw/cpu/meson.build
+2 -1
View File
@@ -1,4 +1,5 @@
system_ss.add(files('core.c', 'cluster.c'))
system_ss.add(files('core.c'))
system_ss.add(when: 'CONFIG_CPU_CLUSTER', if_true: files('cluster.c'))
system_ss.add(when: 'CONFIG_ARM11MPCORE', if_true: files('arm11mpcore.c'))
system_ss.add(when: 'CONFIG_REALVIEW', if_true: files('realview_mpcore.c'))
hw/cxl/cxl-cdat.c
+15 -13
View File
@@ -44,7 +44,7 @@ static void cdat_len_check(CDATSubHeader *hdr, Error **errp)
}
}
static void ct3_build_cdat(CDATObject *cdat, Error **errp)
static bool ct3_build_cdat(CDATObject *cdat, Error **errp)
{
g_autofree CDATTableHeader *cdat_header = NULL;
g_autofree CDATEntry *cdat_st = NULL;
@@ -58,7 +58,7 @@ static void ct3_build_cdat(CDATObject *cdat, Error **errp)
cdat_header = g_malloc0(sizeof(*cdat_header));
if (!cdat_header) {
error_setg(errp, "Failed to allocate CDAT header");
return;
return false;
}
cdat->built_buf_len = cdat->build_cdat_table(&cdat->built_buf,
@@ -67,14 +67,14 @@ static void ct3_build_cdat(CDATObject *cdat, Error **errp)
if (cdat->built_buf_len <= 0) {
/* Build later as not all data available yet */
cdat->to_update = true;
return;
return true;
}
cdat->to_update = false;
cdat_st = g_malloc0(sizeof(*cdat_st) * (cdat->built_buf_len + 1));
if (!cdat_st) {
error_setg(errp, "Failed to allocate CDAT entry array");
return;
return false;
}
/* Entry 0 for CDAT header, starts with Entry 1 */
@@ -109,9 +109,10 @@ static void ct3_build_cdat(CDATObject *cdat, Error **errp)
cdat_st[0].length = sizeof(*cdat_header);
cdat->entry_len = 1 + cdat->built_buf_len;
cdat->entry = g_steal_pointer(&cdat_st);
return true;
}
static void ct3_load_cdat(CDATObject *cdat, Error **errp)
static bool ct3_load_cdat(CDATObject *cdat, Error **errp)
{
g_autofree CDATEntry *cdat_st = NULL;
g_autofree uint8_t *buf = NULL;
@@ -127,11 +128,11 @@ static void ct3_load_cdat(CDATObject *cdat, Error **errp)
&file_size, &error)) {
error_setg(errp, "CDAT: File read failed: %s", error->message);
g_error_free(error);
return;
return false;
}
if (file_size < sizeof(CDATTableHeader)) {
error_setg(errp, "CDAT: File too short");
return;
return false;
}
i = sizeof(CDATTableHeader);
num_ent = 1;
@@ -139,19 +140,19 @@ static void ct3_load_cdat(CDATObject *cdat, Error **errp)
hdr = (CDATSubHeader *)(buf + i);
if (i + sizeof(CDATSubHeader) > file_size) {
error_setg(errp, "CDAT: Truncated table");
return;
return false;
}
cdat_len_check(hdr, errp);
i += hdr->length;
if (i > file_size) {
error_setg(errp, "CDAT: Truncated table");
return;
return false;
}
num_ent++;
}
if (i != file_size) {
error_setg(errp, "CDAT: File length mismatch");
return;
return false;
}
cdat_st = g_new0(CDATEntry, num_ent);
@@ -185,16 +186,17 @@ static void ct3_load_cdat(CDATObject *cdat, Error **errp)
cdat->entry_len = num_ent;
cdat->entry = g_steal_pointer(&cdat_st);
cdat->buf = g_steal_pointer(&buf);
return true;
}
void cxl_doe_cdat_init(CXLComponentState *cxl_cstate, Error **errp)
bool cxl_doe_cdat_init(CXLComponentState *cxl_cstate, Error **errp)
{
CDATObject *cdat = &cxl_cstate->cdat;
if (cdat->filename) {
ct3_load_cdat(cdat, errp);
return ct3_load_cdat(cdat, errp);
} else {
ct3_build_cdat(cdat, errp);
return ct3_build_cdat(cdat, errp);
}
}
hw/i386/pc_sysfw.c
+2 -3
View File
@@ -41,8 +41,7 @@
#define FLASH_SECTOR_SIZE 4096
static void pc_isa_bios_init(MemoryRegion *rom_memory,
MemoryRegion *flash_mem,
int ram_size)
MemoryRegion *flash_mem)
{
int isa_bios_size;
MemoryRegion *isa_bios;
@@ -186,7 +185,7 @@ static void pc_system_flash_map(PCMachineState *pcms,
if (i == 0) {
flash_mem = pflash_cfi01_get_memory(system_flash);
pc_isa_bios_init(rom_memory, flash_mem, size);
pc_isa_bios_init(rom_memory, flash_mem);
/* Encrypt the pflash boot ROM */
if (sev_enabled()) {
hw/mem/cxl_type3.c
+1 -2
View File
@@ -705,8 +705,7 @@ static void ct3_realize(PCIDevice *pci_dev, Error **errp)
cxl_cstate->cdat.build_cdat_table = ct3_build_cdat_table;
cxl_cstate->cdat.free_cdat_table = ct3_free_cdat_table;
cxl_cstate->cdat.private = ct3d;
cxl_doe_cdat_init(cxl_cstate, errp);
if (*errp) {
if (!cxl_doe_cdat_init(cxl_cstate, errp)) {
goto err_free_special_ops;
}
hw/misc/applesmc.c
+21 -15
View File
@@ -145,7 +145,7 @@ static void applesmc_io_cmd_write(void *opaque, hwaddr addr, uint64_t val,
s->data_pos = 0;
}
static struct AppleSMCData *applesmc_find_key(AppleSMCState *s)
static const struct AppleSMCData *applesmc_find_key(AppleSMCState *s)
{
struct AppleSMCData *d;
@@ -161,7 +161,7 @@ static void applesmc_io_data_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
AppleSMCState *s = opaque;
struct AppleSMCData *d;
const struct AppleSMCData *d;
smc_debug("DATA received: 0x%02x\n", (uint8_t)val);
switch (s->cmd) {
@@ -269,23 +269,10 @@ static void applesmc_add_key(AppleSMCState *s, const char *key,
static void qdev_applesmc_isa_reset(DeviceState *dev)
{
AppleSMCState *s = APPLE_SMC(dev);
struct AppleSMCData *d, *next;
/* Remove existing entries */
QLIST_FOREACH_SAFE(d, &s->data_def, node, next) {
QLIST_REMOVE(d, node);
g_free(d);
}
s->status = 0x00;
s->status_1e = 0x00;
s->last_ret = 0x00;
applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03");
applesmc_add_key(s, "OSK0", 32, s->osk);
applesmc_add_key(s, "OSK1", 32, s->osk + 32);
applesmc_add_key(s, "NATJ", 1, "\0");
applesmc_add_key(s, "MSSP", 1, "\0");
applesmc_add_key(s, "MSSD", 1, "\0x3");
}
static const MemoryRegionOps applesmc_data_io_ops = {
@@ -343,6 +330,24 @@ static void applesmc_isa_realize(DeviceState *dev, Error **errp)
}
QLIST_INIT(&s->data_def);
applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03");
applesmc_add_key(s, "OSK0", 32, s->osk);
applesmc_add_key(s, "OSK1", 32, s->osk + 32);
applesmc_add_key(s, "NATJ", 1, "\0");
applesmc_add_key(s, "MSSP", 1, "\0");
applesmc_add_key(s, "MSSD", 1, "\0x3");
}
static void applesmc_unrealize(DeviceState *dev)
{
AppleSMCState *s = APPLE_SMC(dev);
struct AppleSMCData *d, *next;
/* Remove existing entries */
QLIST_FOREACH_SAFE(d, &s->data_def, node, next) {
QLIST_REMOVE(d, node);
g_free(d);
}
}
static Property applesmc_isa_properties[] = {
@@ -377,6 +382,7 @@ static void qdev_applesmc_class_init(ObjectClass *klass, void *data)
AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
dc->realize = applesmc_isa_realize;
dc->unrealize = applesmc_unrealize;
dc->reset = qdev_applesmc_isa_reset;
device_class_set_props(dc, applesmc_isa_properties);
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
hw/misc/imx25_ccm.c
+1 -1
View File
@@ -91,7 +91,7 @@ static const char *imx25_ccm_reg_name(uint32_t reg)
case IMX25_CCM_LPIMR1_REG:
return "lpimr1";
default:
sprintf(unknown, "[%u ?]", reg);
snprintf(unknown, sizeof(unknown), "[%u ?]", reg);
return unknown;
}
}
hw/misc/imx31_ccm.c
+1 -1
View File
@@ -89,7 +89,7 @@ static const char *imx31_ccm_reg_name(uint32_t reg)
case IMX31_CCM_PDR2_REG:
return "PDR2";
default:
sprintf(unknown, "[%u ?]", reg);
snprintf(unknown, sizeof(unknown), "[%u ?]", reg);
return unknown;
}
}
hw/misc/imx6_ccm.c
+2 -2
View File
@@ -85,7 +85,7 @@ static const char *imx6_ccm_reg_name(uint32_t reg)
case CCM_CMEOR:
return "CMEOR";
default:
sprintf(unknown, "%u ?", reg);
snprintf(unknown, sizeof(unknown), "%u ?", reg);
return unknown;
}
}
@@ -224,7 +224,7 @@ static const char *imx6_analog_reg_name(uint32_t reg)
case USB_ANALOG_DIGPROG:
return "USB_ANALOG_DIGPROG";
default:
sprintf(unknown, "%u ?", reg);
snprintf(unknown, sizeof(unknown), "%u ?", reg);
return unknown;
}
}
hw/misc/imx6_src.c
+1 -1
View File
@@ -68,7 +68,7 @@ static const char *imx6_src_reg_name(uint32_t reg)
case SRC_GPR10:
return "SRC_GPR10";
default:
sprintf(unknown, "%u ?", reg);
snprintf(unknown, sizeof(unknown), "%u ?", reg);
return unknown;
}
}
hw/misc/imx6ul_ccm.c
+2 -2
View File
@@ -143,7 +143,7 @@ static const char *imx6ul_ccm_reg_name(uint32_t reg)
case CCM_CMEOR:
return "CMEOR";
default:
sprintf(unknown, "%u ?", reg);
snprintf(unknown, sizeof(unknown), "%u ?", reg);
return unknown;
}
}
@@ -274,7 +274,7 @@ static const char *imx6ul_analog_reg_name(uint32_t reg)
case USB_ANALOG_DIGPROG:
return "USB_ANALOG_DIGPROG";
default:
sprintf(unknown, "%u ?", reg);
snprintf(unknown, sizeof(unknown), "%u ?", reg);
return unknown;
}
}

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