From 464136ceb65ddebbd60fecd486628cc82fd722ab Mon Sep 17 00:00:00 2001 From: Song Gao Date: Fri, 20 Oct 2023 16:49:24 +0800 Subject: [PATCH] target/loongarch: Allow user enable/disable LSX/LASX features 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 Reviewed-by: Richard Henderson Message-Id: <20231020084925.3457084-3-gaosong@loongson.cn> --- target/loongarch/cpu.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++ target/loongarch/cpu.h | 2 ++ 2 files changed, 69 insertions(+) diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c index ef6922e812..a60d07acd5 100644 --- a/target/loongarch/cpu.c +++ b/target/loongarch/cpu.c @@ -443,6 +443,7 @@ 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) @@ -622,6 +623,72 @@ 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; + } else { + ret = false; + } + 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); + } +} + +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; + } else { + ret = false; + } + return ret; +} + +static void loongarch_set_lasx(Object *obj, bool value, Error **errp) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(obj); + + if (value) { + if (!FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LSX)) { + 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); + } +} + +void loongarch_cpu_post_init(Object *obj) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(obj); + + if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LSX)) { + object_property_add_bool(obj, "lsx", loongarch_get_lsx, + loongarch_set_lsx); + } + if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LASX)) { + object_property_add_bool(obj, "lasx", loongarch_get_lasx, + loongarch_set_lasx); + } +} + static void loongarch_cpu_init(Object *obj) { #ifndef CONFIG_USER_ONLY diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h index 8b54cf109c..9d0f79f814 100644 --- a/target/loongarch/cpu.h +++ b/target/loongarch/cpu.h @@ -486,4 +486,6 @@ 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 */ -- 2.11.0