@@ -1061,6 +1061,15 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
mcc->parent_realize(dev, errp);
}
+bool riscv_cpu_accelerator_compatible(RISCVCPU *cpu)
+{
+ if (tcg_enabled()) {
+ return riscv_cpu_tcg_compatible(cpu);
+ }
+
+ return true;
+}
+
#ifndef CONFIG_USER_ONLY
static void cpu_riscv_get_satp(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
@@ -734,6 +734,7 @@ char *riscv_cpu_get_name(RISCVCPU *cpu);
void riscv_cpu_finalize_features(RISCVCPU *cpu, Error **errp);
void riscv_add_satp_mode_properties(Object *obj);
+bool riscv_cpu_accelerator_compatible(RISCVCPU *cpu);
/* CSR function table */
extern riscv_csr_operations csr_ops[CSR_TABLE_SIZE];
@@ -582,6 +582,11 @@ void riscv_tcg_cpu_finalize_features(RISCVCPU *cpu, Error **errp)
}
}
+bool riscv_cpu_tcg_compatible(RISCVCPU *cpu)
+{
+ return object_dynamic_cast(OBJECT(cpu), TYPE_RISCV_CPU_HOST) == NULL;
+}
+
static bool riscv_cpu_is_generic(Object *cpu_obj)
{
return object_dynamic_cast(cpu_obj, TYPE_RISCV_DYNAMIC_CPU) != NULL;
@@ -599,7 +604,7 @@ static bool tcg_cpu_realizefn(CPUState *cs, Error **errp)
RISCVCPU *cpu = RISCV_CPU(cs);
Error *local_err = NULL;
- if (object_dynamic_cast(OBJECT(cpu), TYPE_RISCV_CPU_HOST)) {
+ if (!riscv_cpu_tcg_compatible(cpu)) {
g_autofree char *name = riscv_cpu_get_name(cpu);
error_setg(errp, "'%s' CPU is not compatible with TCG acceleration",
name);
@@ -24,5 +24,6 @@
void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp);
void riscv_tcg_cpu_finalize_features(RISCVCPU *cpu, Error **errp);
+bool riscv_cpu_tcg_compatible(RISCVCPU *cpu);
#endif
Add an API to check if a given CPU is compatible with the current accelerator. This will allow query-cpu-model-expansion to work properly in conditions where QEMU supports both accelerators (TCG and KVM), QEMU is then launched using TCG, and the API requests information about a KVM only CPU (e.g. 'host' CPU). KVM doesn't have such restrictions and, at least in theory, all CPUs models should work with KVM. We will revisit this API in case we decide to restrict the amount of KVM CPUs we support. Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> --- target/riscv/cpu.c | 9 +++++++++ target/riscv/cpu.h | 1 + target/riscv/tcg/tcg-cpu.c | 7 ++++++- target/riscv/tcg/tcg-cpu.h | 1 + 4 files changed, 17 insertions(+), 1 deletion(-)