This make the cpu works the similar way like the -device option.
For device option,
"""
./qemu-system-riscv64 -device e1000,help
e1000 options:
acpi-index=<uint32> - (default: 0)
addr=<int32> - Slot and optional function number, example: 06.0 or
06 (default: -1)
autonegotiation=<bool> - on/off (default: true)
bootindex=<int32>
extra_mac_registers=<bool> - on/off (default: true)
failover_pair_id=<str>
"""
After this patch, the cpu can output its configurations,
"""
./qemu-system-riscv64 -cpu rv64,help
Enable extension:
rv64imafdch_zicbom_zicboz_zicsr_zifencei_zihintpause_zawrs_zfa_zba_zbb_zbc_zbs_sstc_svadu
"""
Signed-off-by: LIU Zhiwei <zhiwei_...@linux.alibaba.com>
---
cpu.c | 2 +-
include/hw/core/cpu.h | 11 +++++++++++
softmmu/vl.c | 35 +++++++++++++++++++++++++++++++++++
3 files changed, 47 insertions(+), 1 deletion(-)
diff --git a/cpu.c b/cpu.c
index 03a313cd72..712bd02684 100644
--- a/cpu.c
+++ b/cpu.c
@@ -257,7 +257,7 @@ void cpu_exec_initfn(CPUState *cpu)
#endif
}
-static const char *cpu_type_by_name(const char *cpu_model)
+const char *cpu_type_by_name(const char *cpu_model)
{
ObjectClass *oc;
const char *cpu_type;
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index fdcbe87352..49d41afdfa 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -657,6 +657,17 @@ CPUState *cpu_create(const char *typename);
*/
const char *parse_cpu_option(const char *cpu_option);
+/**
+ * cpu_type_by_name:
+ * @cpu_model: The -cpu command line model name.
+ *
+ * Looks up type name by the -cpu command line model name
+ *
+ * Returns: type name of CPU or prints error and terminates process
+ * if an error occurred.
+ */
+const char *cpu_type_by_name(const char *cpu_model);
+
/**
* cpu_has_work:
* @cpu: The vCPU to check.
diff --git a/softmmu/vl.c b/softmmu/vl.c
index b0b96f67fa..bc30f3954d 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -218,6 +218,15 @@ static struct {
{ .driver = "virtio-vga-gl", .flag = &default_vga },
};
+static QemuOptsList qemu_cpu_opts = {
+ .name = "cpu",
+ .implied_opt_name = "cpu_model",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_cpu_opts.head),
+ .desc = {
+ { /* end of list */ }
+ },
+};
+
static QemuOptsList qemu_rtc_opts = {
.name = "rtc",
.head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
@@ -1140,6 +1149,21 @@ static int parse_fw_cfg(void *opaque, QemuOpts *opts,
Error **errp)
return 0;
}
+static int cpu_help_func(void *opaque, QemuOpts *opts, Error **errp)
+{
+ const char *cpu_model, *cpu_type;
+ cpu_model = qemu_opt_get(opts, "cpu_model");
+ if (!cpu_model) {
+ return 1;
+ }
+ if (!qemu_opt_has_help_opt(opts)) {
+ return 0;
+ }
+ cpu_type = cpu_type_by_name(cpu_model);
+ list_cpu_props((CPUState *)object_new(cpu_type));
+ return 1;
+}
+
static int device_help_func(void *opaque, QemuOpts *opts, Error **errp)
{
return qdev_device_help(opts);
@@ -2467,6 +2491,11 @@ static void qemu_process_help_options(void)
exit(0);
}
+ if (qemu_opts_foreach(qemu_find_opts("cpu"),
+ cpu_help_func, NULL, NULL)) {
+ exit(0);
+ }
+
if (qemu_opts_foreach(qemu_find_opts("device"),
device_help_func, NULL, NULL)) {
exit(0);
@@ -2680,6 +2709,7 @@ void qemu_init(int argc, char **argv)
qemu_add_drive_opts(&bdrv_runtime_opts);
qemu_add_opts(&qemu_chardev_opts);
qemu_add_opts(&qemu_device_opts);
+ qemu_add_opts(&qemu_cpu_opts);
qemu_add_opts(&qemu_netdev_opts);
qemu_add_opts(&qemu_nic_opts);
qemu_add_opts(&qemu_net_opts);
@@ -2756,6 +2786,11 @@ void qemu_init(int argc, char **argv)
case QEMU_OPTION_cpu:
/* hw initialization will check this */
cpu_option = optarg;
+ opts = qemu_opts_parse_noisily(qemu_find_opts("cpu"),
+ optarg, true);
+ if (!opts) {
+ exit(1);
+ }
break;
case QEMU_OPTION_hda:
case QEMU_OPTION_hdb:
--
2.17.1
