@@ -447,6 +447,7 @@ static void loongarch_la464_initfn(Object *obj)
env->cpucfg[20] = data;
env->CSR_ASID = FIELD_DP64(0, CSR_ASID, ASIDBITS, 0xa);
+ loongarch_cpu_post_init(obj);
}
static void loongarch_la132_initfn(Object *obj)
@@ -626,6 +627,83 @@ static const MemoryRegionOps loongarch_qemu_ops = {
};
#endif
+static bool loongarch_get_lsx(Object *obj, Error **errp)
+{
+ LoongArchCPU *cpu = LOONGARCH_CPU(obj);
+ bool ret;
+
+ if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LSX)) {
+ ret = true;
+ cpu->has_lsx = ON_OFF_AUTO_AUTO;
+ } else {
+ ret = false;
+ cpu->has_lsx = ON_OFF_AUTO_OFF;
+ }
+ return ret;
+}
+
+static void loongarch_set_lsx(Object *obj, bool value, Error **errp)
+{
+ LoongArchCPU *cpu = LOONGARCH_CPU(obj);
+
+ if (value) {
+ cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LSX, 1);
+ } else {
+ cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LSX, 0);
+ cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LASX, 0);
+ }
+
+ cpu->has_lsx = value ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
+}
+
+static bool loongarch_get_lasx(Object *obj, Error **errp)
+{
+ LoongArchCPU *cpu = LOONGARCH_CPU(obj);
+ bool ret;
+
+ if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LASX)) {
+ ret = true;
+ cpu->has_lasx = true;
+ } else {
+ ret = false;
+ cpu->has_lasx = false;
+ }
+ return ret;
+}
+
+static void loongarch_set_lasx(Object *obj, bool value, Error **errp)
+{
+ LoongArchCPU *cpu = LOONGARCH_CPU(obj);
+
+ if (value) {
+ if (cpu->has_lsx == ON_OFF_AUTO_AUTO || cpu->has_lsx == ON_OFF_AUTO_OFF) {
+ cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LSX, 1);
+ }
+ cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LASX, 1);
+ } else {
+ cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LASX, 0);
+ }
+
+ cpu->has_lasx = value;
+}
+
+void loongarch_cpu_post_init(Object *obj)
+{
+ LoongArchCPU *cpu = LOONGARCH_CPU(obj);
+ CPULoongArchState *env = &cpu->env;
+
+ if (loongarch_feature(env, CPU_FEATURE_LSX)) {
+ cpu->has_lsx = ON_OFF_AUTO_AUTO;
+ object_property_add_bool(obj, "lsx", loongarch_get_lsx,
+ loongarch_set_lsx);
+ }
+ if (loongarch_feature(env, CPU_FEATURE_LASX)) {
+ cpu->has_lasx = ON_OFF_AUTO_AUTO;
+ object_property_add_bool(obj, "lasx", loongarch_get_lasx,
+ loongarch_set_lasx);
+ }
+}
+
static void loongarch_cpu_init(Object *obj)
{
#ifndef CONFIG_USER_ONLY
@@ -13,6 +13,7 @@
#include "fpu/softfloat-types.h"
#include "hw/registerfields.h"
#include "qemu/timer.h"
+#include "qapi/qapi-types-common.h"
#ifndef CONFIG_USER_ONLY
#include "exec/memory.h"
#endif
@@ -413,6 +414,11 @@ struct ArchCPU {
/* 'compatible' string for this CPU for Linux device trees */
const char *dtb_compatible;
+
+ /* CPU has LSX */
+ OnOffAuto has_lsx;
+ /* CPU has LASX */
+ OnOffAuto has_lasx;
};
#define TYPE_LOONGARCH_CPU "loongarch-cpu"
@@ -518,4 +524,6 @@ void loongarch_cpu_list(void);
#define LOONGARCH_CPU_TYPE_NAME(model) model LOONGARCH_CPU_TYPE_SUFFIX
#define CPU_RESOLVING_TYPE TYPE_LOONGARCH_CPU
+void loongarch_cpu_post_init(Object *obj);
+
#endif /* LOONGARCH_CPU_H */
Some users may not need LSX/LASX, this patch allows the user enable/disable LSX/LASX features. e.g '-cpu max,lsx=on,lasx=on' (default); '-cpu max,lsx=on,lasx=off' (enabled LSX); '-cpu max,lsx=off,lasx=on' (enabled LASX, LSX); '-cpu max,lsx=off' (disable LSX and LASX). Signed-off-by: Song Gao <gaosong@loongson.cn> --- target/loongarch/cpu.c | 78 ++++++++++++++++++++++++++++++++++++++++++ target/loongarch/cpu.h | 8 +++++ 2 files changed, 86 insertions(+)