From 7f0bdfb5bfc2b6f1199f8b09e3b6dc9015b7b9c3 Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Wed, 17 May 2023 10:57:13 -0300 Subject: [PATCH] target/riscv/cpu.c: remove cfg setup from riscv_cpu_init() We have 4 config settings being done in riscv_cpu_init(): ext_ifencei, ext_icsr, mmu and pmp. This is also the constructor of the "riscv-cpu" device, which happens to be the parent device of every RISC-V cpu. The result is that these 4 configs are being set every time, and every other CPU should always account for them. CPUs such as sifive_e need to disable settings that aren't enabled simply because the parent class happens to be enabling it. Moving all configurations from the parent class to each CPU will centralize the config of each CPU into its own init(), which is clearer than having to account to whatever happens to be set in the parent device. These settings are also being set in register_cpu_props() when no 'misa_ext' is set, so for these CPUs we don't need changes. Named CPUs will receive all cfgs that the parent were setting into their init(). Signed-off-by: Daniel Henrique Barboza Reviewed-by: LIU Zhiwei Reviewed-by: Weiwei Li Reviewed-by: Alistair Francis Message-Id: <20230517135714.211809-11-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis --- target/riscv/cpu.c | 59 +++++++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 47 insertions(+), 12 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 9f2c8fa7c6..778801dffc 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -332,7 +332,8 @@ static void set_satp_mode_default_map(RISCVCPU *cpu) static void riscv_any_cpu_init(Object *obj) { - CPURISCVState *env = &RISCV_CPU(obj)->env; + RISCVCPU *cpu = RISCV_CPU(obj); + CPURISCVState *env = &cpu->env; #if defined(TARGET_RISCV32) set_misa(env, MXL_RV32, RVI | RVM | RVA | RVF | RVD | RVC | RVU); #elif defined(TARGET_RISCV64) @@ -346,6 +347,12 @@ static void riscv_any_cpu_init(Object *obj) #endif env->priv_ver = PRIV_VERSION_LATEST; + + /* inherited from parent obj via riscv_cpu_init() */ + cpu->cfg.ext_ifencei = true; + cpu->cfg.ext_icsr = true; + cpu->cfg.mmu = true; + cpu->cfg.pmp = true; } #if defined(TARGET_RISCV64) @@ -364,12 +371,19 @@ static void rv64_base_cpu_init(Object *obj) static void rv64_sifive_u_cpu_init(Object *obj) { - CPURISCVState *env = &RISCV_CPU(obj)->env; + RISCVCPU *cpu = RISCV_CPU(obj); + CPURISCVState *env = &cpu->env; set_misa(env, MXL_RV64, RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU); env->priv_ver = PRIV_VERSION_1_10_0; #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(RISCV_CPU(obj), VM_1_10_SV39); #endif + + /* inherited from parent obj via riscv_cpu_init() */ + cpu->cfg.ext_ifencei = true; + cpu->cfg.ext_icsr = true; + cpu->cfg.mmu = true; + cpu->cfg.pmp = true; } static void rv64_sifive_e_cpu_init(Object *obj) @@ -379,10 +393,14 @@ static void rv64_sifive_e_cpu_init(Object *obj) set_misa(env, MXL_RV64, RVI | RVM | RVA | RVC | RVU); env->priv_ver = PRIV_VERSION_1_10_0; - cpu->cfg.mmu = false; #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(cpu, VM_1_10_MBARE); #endif + + /* inherited from parent obj via riscv_cpu_init() */ + cpu->cfg.ext_ifencei = true; + cpu->cfg.ext_icsr = true; + cpu->cfg.pmp = true; } static void rv64_thead_c906_cpu_init(Object *obj) @@ -410,6 +428,9 @@ static void rv64_thead_c906_cpu_init(Object *obj) #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(cpu, VM_1_10_SV39); #endif + + /* inherited from parent obj via riscv_cpu_init() */ + cpu->cfg.pmp = true; } static void rv64_veyron_v1_cpu_init(Object *obj) @@ -483,12 +504,19 @@ static void rv32_base_cpu_init(Object *obj) static void rv32_sifive_u_cpu_init(Object *obj) { - CPURISCVState *env = &RISCV_CPU(obj)->env; + RISCVCPU *cpu = RISCV_CPU(obj); + CPURISCVState *env = &cpu->env; set_misa(env, MXL_RV32, RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU); env->priv_ver = PRIV_VERSION_1_10_0; #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(RISCV_CPU(obj), VM_1_10_SV32); #endif + + /* inherited from parent obj via riscv_cpu_init() */ + cpu->cfg.ext_ifencei = true; + cpu->cfg.ext_icsr = true; + cpu->cfg.mmu = true; + cpu->cfg.pmp = true; } static void rv32_sifive_e_cpu_init(Object *obj) @@ -498,10 +526,14 @@ static void rv32_sifive_e_cpu_init(Object *obj) set_misa(env, MXL_RV32, RVI | RVM | RVA | RVC | RVU); env->priv_ver = PRIV_VERSION_1_10_0; - cpu->cfg.mmu = false; #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(cpu, VM_1_10_MBARE); #endif + + /* inherited from parent obj via riscv_cpu_init() */ + cpu->cfg.ext_ifencei = true; + cpu->cfg.ext_icsr = true; + cpu->cfg.pmp = true; } static void rv32_ibex_cpu_init(Object *obj) @@ -511,11 +543,15 @@ static void rv32_ibex_cpu_init(Object *obj) set_misa(env, MXL_RV32, RVI | RVM | RVC | RVU); env->priv_ver = PRIV_VERSION_1_11_0; - cpu->cfg.mmu = false; #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(cpu, VM_1_10_MBARE); #endif cpu->cfg.epmp = true; + + /* inherited from parent obj via riscv_cpu_init() */ + cpu->cfg.ext_ifencei = true; + cpu->cfg.ext_icsr = true; + cpu->cfg.pmp = true; } static void rv32_imafcu_nommu_cpu_init(Object *obj) @@ -525,10 +561,14 @@ static void rv32_imafcu_nommu_cpu_init(Object *obj) set_misa(env, MXL_RV32, RVI | RVM | RVA | RVF | RVC | RVU); env->priv_ver = PRIV_VERSION_1_10_0; - cpu->cfg.mmu = false; #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(cpu, VM_1_10_MBARE); #endif + + /* inherited from parent obj via riscv_cpu_init() */ + cpu->cfg.ext_ifencei = true; + cpu->cfg.ext_icsr = true; + cpu->cfg.pmp = true; } #endif @@ -1441,11 +1481,6 @@ static void riscv_cpu_init(Object *obj) { RISCVCPU *cpu = RISCV_CPU(obj); - cpu->cfg.ext_ifencei = true; - cpu->cfg.ext_icsr = true; - cpu->cfg.mmu = true; - cpu->cfg.pmp = true; - cpu_set_cpustate_pointers(cpu); #ifndef CONFIG_USER_ONLY -- 2.11.0