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-rw-r--r--docs/specs/fw_cfg.txt21
-rw-r--r--hw/nvram/fw_cfg.c55
-rw-r--r--hw/ppc/mac_newworld.c2
-rw-r--r--hw/ppc/mac_oldworld.c2
-rw-r--r--hw/sparc/sun4m.c2
-rw-r--r--hw/sparc64/sun4u.c2
-rw-r--r--include/hw/nvram/fw_cfg.h3
-rw-r--r--qemu-options.hx11
-rw-r--r--tests/bios-tables-test.c76
-rw-r--r--trace-events2
-rw-r--r--util/qemu-config.c2
-rw-r--r--vl.c63
12 files changed, 163 insertions, 78 deletions
diff --git a/docs/specs/fw_cfg.txt b/docs/specs/fw_cfg.txt
index 6accd924bd..74351dd18f 100644
--- a/docs/specs/fw_cfg.txt
+++ b/docs/specs/fw_cfg.txt
@@ -203,3 +203,24 @@ completes fully overwriting the item's data.
NOTE: This function is deprecated, and will be completely removed
starting with QEMU v2.4.
+
+== Externally Provided Items ==
+
+As of v2.4, "file" fw_cfg items (i.e., items with selector keys above
+FW_CFG_FILE_FIRST, and with a corresponding entry in the fw_cfg file
+directory structure) may be inserted via the QEMU command line, using
+the following syntax:
+
+ -fw_cfg [name=]<item_name>,file=<path>
+
+where <item_name> is the fw_cfg item name, and <path> is the location
+on the host file system of a file containing the data to be inserted.
+
+NOTE: Users *SHOULD* choose item names beginning with the prefix "opt/"
+when using the "-fw_cfg" command line option, to avoid conflicting with
+item names used internally by QEMU. For instance:
+
+ -fw_cfg name=opt/my_item_name,file=./my_blob.bin
+
+Similarly, QEMU developers *SHOULD NOT* use item names prefixed with
+"opt/" when inserting items programmatically, e.g. via fw_cfg_add_file().
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 68eff77983..88481b78c4 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -46,7 +46,6 @@ typedef struct FWCfgEntry {
uint32_t len;
uint8_t *data;
void *callback_opaque;
- FWCfgCallback callback;
FWCfgReadCallback read_callback;
} FWCfgEntry;
@@ -232,19 +231,7 @@ static void fw_cfg_reboot(FWCfgState *s)
static void fw_cfg_write(FWCfgState *s, uint8_t value)
{
- int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
- FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
-
- trace_fw_cfg_write(s, value);
-
- if (s->cur_entry & FW_CFG_WRITE_CHANNEL && e->callback &&
- s->cur_offset < e->len) {
- e->data[s->cur_offset++] = value;
- if (s->cur_offset == e->len) {
- e->callback(e->callback_opaque, e->data);
- s->cur_offset = 0;
- }
- }
+ /* nothing, write support removed in QEMU v2.4+ */
}
static int fw_cfg_select(FWCfgState *s, uint16_t key)
@@ -436,6 +423,7 @@ static void fw_cfg_add_bytes_read_callback(FWCfgState *s, uint16_t key,
key &= FW_CFG_ENTRY_MASK;
assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);
+ assert(s->entries[arch][key].data == NULL); /* avoid key conflict */
s->entries[arch][key].data = data;
s->entries[arch][key].len = (uint32_t)len;
@@ -458,7 +446,6 @@ static void *fw_cfg_modify_bytes_read(FWCfgState *s, uint16_t key,
s->entries[arch][key].data = data;
s->entries[arch][key].len = len;
s->entries[arch][key].callback_opaque = NULL;
- s->entries[arch][key].callback = NULL;
return ptr;
}
@@ -484,6 +471,16 @@ void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
fw_cfg_add_bytes(s, key, copy, sizeof(value));
}
+void fw_cfg_modify_i16(FWCfgState *s, uint16_t key, uint16_t value)
+{
+ uint16_t *copy, *old;
+
+ copy = g_malloc(sizeof(value));
+ *copy = cpu_to_le16(value);
+ old = fw_cfg_modify_bytes_read(s, key, copy, sizeof(value));
+ g_free(old);
+}
+
void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
{
uint32_t *copy;
@@ -502,23 +499,6 @@ void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
fw_cfg_add_bytes(s, key, copy, sizeof(value));
}
-void fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
- void *callback_opaque, void *data, size_t len)
-{
- int arch = !!(key & FW_CFG_ARCH_LOCAL);
-
- assert(key & FW_CFG_WRITE_CHANNEL);
-
- key &= FW_CFG_ENTRY_MASK;
-
- assert(key < FW_CFG_MAX_ENTRY && len <= UINT32_MAX);
-
- s->entries[arch][key].data = data;
- s->entries[arch][key].len = (uint32_t)len;
- s->entries[arch][key].callback_opaque = callback_opaque;
- s->entries[arch][key].callback = callback;
-}
-
void fw_cfg_add_file_callback(FWCfgState *s, const char *filename,
FWCfgReadCallback callback, void *callback_opaque,
void *data, size_t len)
@@ -535,18 +515,19 @@ void fw_cfg_add_file_callback(FWCfgState *s, const char *filename,
index = be32_to_cpu(s->files->count);
assert(index < FW_CFG_FILE_SLOTS);
- fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index,
- callback, callback_opaque, data, len);
-
pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
filename);
for (i = 0; i < index; i++) {
if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
- trace_fw_cfg_add_file_dupe(s, s->files->f[index].name);
- return;
+ error_report("duplicate fw_cfg file name: %s",
+ s->files->f[index].name);
+ exit(1);
}
}
+ fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index,
+ callback, callback_opaque, data, len);
+
s->files->f[index].size = cpu_to_be32(len);
s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
trace_fw_cfg_add_file(s, index, s->files->f[index].name, len);
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index a365bf9223..0f3e34122a 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -119,7 +119,7 @@ static const MemoryRegionOps unin_ops = {
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
{
- fw_cfg_add_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
+ fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
}
static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index f26133dedd..99879dd2d5 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -52,7 +52,7 @@
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
{
- fw_cfg_add_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
+ fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
}
static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index 8a3599c403..68ac4d8bba 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -124,7 +124,7 @@ void DMA_register_channel (int nchan,
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
{
- fw_cfg_add_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
+ fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
}
static void nvram_init(Nvram *nvram, uint8_t *macaddr,
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index 6f34e87935..30cfa0e0a0 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -127,7 +127,7 @@ void DMA_register_channel (int nchan,
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
{
- fw_cfg_add_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
+ fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
}
static int sun4u_NVRAM_set_params(Nvram *nvram, uint16_t NVRAM_size,
diff --git a/include/hw/nvram/fw_cfg.h b/include/hw/nvram/fw_cfg.h
index 6d8a8ac564..e60d3ca212 100644
--- a/include/hw/nvram/fw_cfg.h
+++ b/include/hw/nvram/fw_cfg.h
@@ -67,10 +67,9 @@ typedef void (*FWCfgReadCallback)(void *opaque, uint32_t offset);
void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len);
void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value);
void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value);
+void fw_cfg_modify_i16(FWCfgState *s, uint16_t key, uint16_t value);
void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value);
void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value);
-void fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
- void *callback_opaque, void *data, size_t len);
void fw_cfg_add_file(FWCfgState *s, const char *filename, void *data,
size_t len);
void fw_cfg_add_file_callback(FWCfgState *s, const char *filename,
diff --git a/qemu-options.hx b/qemu-options.hx
index 4be98f71df..1d281f6818 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -2686,6 +2686,17 @@ STEXI
@table @option
ETEXI
+DEF("fw_cfg", HAS_ARG, QEMU_OPTION_fwcfg,
+ "-fw_cfg [name=]<name>,file=<file>\n"
+ " add named fw_cfg entry from file\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -fw_cfg [name=]@var{name},file=@var{file}
+@findex -fw_cfg
+Add named fw_cfg entry from file. @var{name} determines the name of
+the entry in the fw_cfg file directory exposed to the guest.
+ETEXI
+
DEF("serial", HAS_ARG, QEMU_OPTION_serial, \
"-serial dev redirect the serial port to char device 'dev'\n",
QEMU_ARCH_ALL)
diff --git a/tests/bios-tables-test.c b/tests/bios-tables-test.c
index 7e85dc45e3..0de1742d7d 100644
--- a/tests/bios-tables-test.c
+++ b/tests/bios-tables-test.c
@@ -599,35 +599,15 @@ static void test_acpi_asl(test_data *data)
free_test_data(&exp_data);
}
-static void test_smbios_ep_address(test_data *data)
-{
- uint32_t off;
-
- /* find smbios entry point structure */
- for (off = 0xf0000; off < 0x100000; off += 0x10) {
- uint8_t sig[] = "_SM_";
- int i;
-
- for (i = 0; i < sizeof sig - 1; ++i) {
- sig[i] = readb(off + i);
- }
-
- if (!memcmp(sig, "_SM_", sizeof sig)) {
- break;
- }
- }
-
- g_assert_cmphex(off, <, 0x100000);
- data->smbios_ep_addr = off;
-}
-
-static void test_smbios_ep_table(test_data *data)
+static bool smbios_ep_table_ok(test_data *data)
{
struct smbios_entry_point *ep_table = &data->smbios_ep_table;
uint32_t addr = data->smbios_ep_addr;
ACPI_READ_ARRAY(ep_table->anchor_string, addr);
- g_assert(!memcmp(ep_table->anchor_string, "_SM_", 4));
+ if (memcmp(ep_table->anchor_string, "_SM_", 4)) {
+ return false;
+ }
ACPI_READ_FIELD(ep_table->checksum, addr);
ACPI_READ_FIELD(ep_table->length, addr);
ACPI_READ_FIELD(ep_table->smbios_major_version, addr);
@@ -636,17 +616,50 @@ static void test_smbios_ep_table(test_data *data)
ACPI_READ_FIELD(ep_table->entry_point_revision, addr);
ACPI_READ_ARRAY(ep_table->formatted_area, addr);
ACPI_READ_ARRAY(ep_table->intermediate_anchor_string, addr);
- g_assert(!memcmp(ep_table->intermediate_anchor_string, "_DMI_", 5));
+ if (memcmp(ep_table->intermediate_anchor_string, "_DMI_", 5)) {
+ return false;
+ }
ACPI_READ_FIELD(ep_table->intermediate_checksum, addr);
ACPI_READ_FIELD(ep_table->structure_table_length, addr);
- g_assert_cmpuint(ep_table->structure_table_length, >, 0);
+ if (ep_table->structure_table_length == 0) {
+ return false;
+ }
ACPI_READ_FIELD(ep_table->structure_table_address, addr);
ACPI_READ_FIELD(ep_table->number_of_structures, addr);
- g_assert_cmpuint(ep_table->number_of_structures, >, 0);
+ if (ep_table->number_of_structures == 0) {
+ return false;
+ }
ACPI_READ_FIELD(ep_table->smbios_bcd_revision, addr);
- g_assert(!acpi_checksum((uint8_t *)ep_table, sizeof *ep_table));
- g_assert(!acpi_checksum((uint8_t *)ep_table + 0x10,
- sizeof *ep_table - 0x10));
+ if (acpi_checksum((uint8_t *)ep_table, sizeof *ep_table) ||
+ acpi_checksum((uint8_t *)ep_table + 0x10, sizeof *ep_table - 0x10)) {
+ return false;
+ }
+ return true;
+}
+
+static void test_smbios_entry_point(test_data *data)
+{
+ uint32_t off;
+
+ /* find smbios entry point structure */
+ for (off = 0xf0000; off < 0x100000; off += 0x10) {
+ uint8_t sig[] = "_SM_";
+ int i;
+
+ for (i = 0; i < sizeof sig - 1; ++i) {
+ sig[i] = readb(off + i);
+ }
+
+ if (!memcmp(sig, "_SM_", sizeof sig)) {
+ /* signature match, but is this a valid entry point? */
+ data->smbios_ep_addr = off;
+ if (smbios_ep_table_ok(data)) {
+ break;
+ }
+ }
+ }
+
+ g_assert_cmphex(off, <, 0x100000);
}
static inline bool smbios_single_instance(uint8_t type)
@@ -767,8 +780,7 @@ static void test_acpi_one(const char *params, test_data *data)
}
}
- test_smbios_ep_address(data);
- test_smbios_ep_table(data);
+ test_smbios_entry_point(data);
test_smbios_structs(data);
qtest_quit(global_qtest);
diff --git a/trace-events b/trace-events
index 7af9f19a33..09d94ea980 100644
--- a/trace-events
+++ b/trace-events
@@ -193,10 +193,8 @@ ecc_diag_mem_writeb(uint64_t addr, uint32_t val) "Write diagnostic %"PRId64" = %
ecc_diag_mem_readb(uint64_t addr, uint32_t ret) "Read diagnostic %"PRId64"= %02x"
# hw/nvram/fw_cfg.c
-fw_cfg_write(void *s, uint8_t value) "%p %d"
fw_cfg_select(void *s, uint16_t key, int ret) "%p key %d = %d"
fw_cfg_read(void *s, uint8_t ret) "%p = %d"
-fw_cfg_add_file_dupe(void *s, char *name) "%p %s"
fw_cfg_add_file(void *s, int index, char *name, size_t len) "%p #%d: %s (%zd bytes)"
# hw/block/hd-geometry.c
diff --git a/util/qemu-config.c b/util/qemu-config.c
index 35adfda496..6cfdd7204a 100644
--- a/util/qemu-config.c
+++ b/util/qemu-config.c
@@ -6,7 +6,7 @@
#include "qapi/error.h"
#include "qmp-commands.h"
-static QemuOptsList *vm_config_groups[32];
+static QemuOptsList *vm_config_groups[48];
static QemuOptsList *drive_config_groups[4];
static QemuOptsList *find_list(QemuOptsList **lists, const char *group,
diff --git a/vl.c b/vl.c
index d4b2d03e0e..9542095d95 100644
--- a/vl.c
+++ b/vl.c
@@ -492,6 +492,25 @@ static QemuOptsList qemu_semihosting_config_opts = {
},
};
+static QemuOptsList qemu_fw_cfg_opts = {
+ .name = "fw_cfg",
+ .implied_opt_name = "name",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_fw_cfg_opts.head),
+ .desc = {
+ {
+ .name = "name",
+ .type = QEMU_OPT_STRING,
+ .help = "Sets the fw_cfg name of the blob to be inserted",
+ }, {
+ .name = "file",
+ .type = QEMU_OPT_STRING,
+ .help = "Sets the name of the file from which\n"
+ "the fw_cfg blob will be loaded",
+ },
+ { /* end of list */ }
+ },
+};
+
/**
* Get machine options
*
@@ -2127,6 +2146,38 @@ char *qemu_find_file(int type, const char *name)
return NULL;
}
+static int parse_fw_cfg(void *opaque, QemuOpts *opts, Error **errp)
+{
+ gchar *buf;
+ size_t size;
+ const char *name, *file;
+
+ if (opaque == NULL) {
+ error_report("fw_cfg device not available");
+ return -1;
+ }
+ name = qemu_opt_get(opts, "name");
+ file = qemu_opt_get(opts, "file");
+ if (name == NULL || *name == '\0' || file == NULL || *file == '\0') {
+ error_report("invalid argument value");
+ return -1;
+ }
+ if (strlen(name) > FW_CFG_MAX_FILE_PATH - 1) {
+ error_report("name too long (max. %d char)", FW_CFG_MAX_FILE_PATH - 1);
+ return -1;
+ }
+ if (strncmp(name, "opt/", 4) != 0) {
+ error_report("WARNING: externally provided fw_cfg item names "
+ "should be prefixed with \"opt/\"!");
+ }
+ if (!g_file_get_contents(file, &buf, &size, NULL)) {
+ error_report("can't load %s", file);
+ return -1;
+ }
+ fw_cfg_add_file((FWCfgState *)opaque, name, buf, size);
+ return 0;
+}
+
static int device_help_func(void *opaque, QemuOpts *opts, Error **errp)
{
return qdev_device_help(opts);
@@ -2822,6 +2873,7 @@ int main(int argc, char **argv, char **envp)
qemu_add_opts(&qemu_numa_opts);
qemu_add_opts(&qemu_icount_opts);
qemu_add_opts(&qemu_semihosting_config_opts);
+ qemu_add_opts(&qemu_fw_cfg_opts);
runstate_init();
@@ -3438,6 +3490,12 @@ int main(int argc, char **argv, char **envp)
}
do_smbios_option(opts);
break;
+ case QEMU_OPTION_fwcfg:
+ opts = qemu_opts_parse(qemu_find_opts("fw_cfg"), optarg, 1);
+ if (opts == NULL) {
+ exit(1);
+ }
+ break;
case QEMU_OPTION_enable_kvm:
olist = qemu_find_opts("machine");
qemu_opts_parse(olist, "accel=kvm", 0);
@@ -4274,6 +4332,11 @@ int main(int argc, char **argv, char **envp)
numa_post_machine_init();
+ if (qemu_opts_foreach(qemu_find_opts("fw_cfg"),
+ parse_fw_cfg, fw_cfg_find(), NULL) != 0) {
+ exit(1);
+ }
+
/* init USB devices */
if (usb_enabled()) {
if (foreach_device_config(DEV_USB, usb_parse) < 0)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-22 13:52:13 +0000