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Wed, 29 Mar 2023 10:30:07 -0700 (PDT) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com, bmeng@tinylab.org, liweiwei@iscas.ac.cn, zhiwei_liu@linux.alibaba.com, palmer@rivosinc.com, Daniel Henrique Barboza Subject: [PATCH v3 20/20] target/riscv/cpu.c: redesign register_cpu_props() Date: Wed, 29 Mar 2023 14:29:03 -0300 Message-Id: <20230329172903.636383-21-dbarboza@ventanamicro.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230329172903.636383-1-dbarboza@ventanamicro.com> References: <20230329172903.636383-1-dbarboza@ventanamicro.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::235; envelope-from=dbarboza@ventanamicro.com; helo=mail-oi1-x235.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org The function is now a no-op for all cpu_init() callers that are setting a non-zero misa value in set_misa(), since it's no longer used to sync cpu->cfg props with env->misa_ext bits. Remove it in those cases. While we're at it, rename the function to match what it's actually doing: create user properties to set/remove CPU extensions. Make a note that it will overwrite env->misa_ext with the defaults set by each user property. Update the MISA bits comment in cpu.h as well. Signed-off-by: Daniel Henrique Barboza Reviewed-by: Weiwei Li Reviewed-by: Alistair Francis --- target/riscv/cpu.c | 41 ++++++++++------------------------------- target/riscv/cpu.h | 5 +---- 2 files changed, 11 insertions(+), 35 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 6988ff443a..d8568a024c 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -221,7 +221,7 @@ static const char * const riscv_intr_names[] = { "reserved" }; -static void register_cpu_props(Object *obj); +static void riscv_cpu_add_user_properties(Object *obj); const char *riscv_cpu_get_trap_name(target_ulong cause, bool async) { @@ -349,7 +349,6 @@ static void riscv_any_cpu_init(Object *obj) #endif set_priv_version(env, PRIV_VERSION_1_12_0); - register_cpu_props(obj); } #if defined(TARGET_RISCV64) @@ -358,7 +357,7 @@ static void rv64_base_cpu_init(Object *obj) CPURISCVState *env = &RISCV_CPU(obj)->env; /* We set this in the realise function */ set_misa(env, MXL_RV64, 0); - register_cpu_props(obj); + riscv_cpu_add_user_properties(obj); /* Set latest version of privileged specification */ set_priv_version(env, PRIV_VERSION_1_12_0); #ifndef CONFIG_USER_ONLY @@ -370,7 +369,6 @@ static void rv64_sifive_u_cpu_init(Object *obj) { CPURISCVState *env = &RISCV_CPU(obj)->env; set_misa(env, MXL_RV64, RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU); - register_cpu_props(obj); set_priv_version(env, PRIV_VERSION_1_10_0); #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(RISCV_CPU(obj), VM_1_10_SV39); @@ -383,7 +381,6 @@ static void rv64_sifive_e_cpu_init(Object *obj) RISCVCPU *cpu = RISCV_CPU(obj); set_misa(env, MXL_RV64, RVI | RVM | RVA | RVC | RVU); - register_cpu_props(obj); set_priv_version(env, PRIV_VERSION_1_10_0); cpu->cfg.mmu = false; #ifndef CONFIG_USER_ONLY @@ -429,7 +426,7 @@ static void rv128_base_cpu_init(Object *obj) CPURISCVState *env = &RISCV_CPU(obj)->env; /* We set this in the realise function */ set_misa(env, MXL_RV128, 0); - register_cpu_props(obj); + riscv_cpu_add_user_properties(obj); /* Set latest version of privileged specification */ set_priv_version(env, PRIV_VERSION_1_12_0); #ifndef CONFIG_USER_ONLY @@ -442,7 +439,7 @@ static void rv32_base_cpu_init(Object *obj) CPURISCVState *env = &RISCV_CPU(obj)->env; /* We set this in the realise function */ set_misa(env, MXL_RV32, 0); - register_cpu_props(obj); + riscv_cpu_add_user_properties(obj); /* Set latest version of privileged specification */ set_priv_version(env, PRIV_VERSION_1_12_0); #ifndef CONFIG_USER_ONLY @@ -454,7 +451,6 @@ static void rv32_sifive_u_cpu_init(Object *obj) { CPURISCVState *env = &RISCV_CPU(obj)->env; set_misa(env, MXL_RV32, RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU); - register_cpu_props(obj); set_priv_version(env, PRIV_VERSION_1_10_0); #ifndef CONFIG_USER_ONLY set_satp_mode_max_supported(RISCV_CPU(obj), VM_1_10_SV32); @@ -467,7 +463,6 @@ static void rv32_sifive_e_cpu_init(Object *obj) RISCVCPU *cpu = RISCV_CPU(obj); set_misa(env, MXL_RV32, RVI | RVM | RVA | RVC | RVU); - register_cpu_props(obj); set_priv_version(env, PRIV_VERSION_1_10_0); cpu->cfg.mmu = false; #ifndef CONFIG_USER_ONLY @@ -481,7 +476,6 @@ static void rv32_ibex_cpu_init(Object *obj) RISCVCPU *cpu = RISCV_CPU(obj); set_misa(env, MXL_RV32, RVI | RVM | RVC | RVU); - register_cpu_props(obj); set_priv_version(env, PRIV_VERSION_1_11_0); cpu->cfg.mmu = false; #ifndef CONFIG_USER_ONLY @@ -496,7 +490,6 @@ static void rv32_imafcu_nommu_cpu_init(Object *obj) RISCVCPU *cpu = RISCV_CPU(obj); set_misa(env, MXL_RV32, RVI | RVM | RVA | RVF | RVC | RVU); - register_cpu_props(obj); set_priv_version(env, PRIV_VERSION_1_10_0); cpu->cfg.mmu = false; #ifndef CONFIG_USER_ONLY @@ -514,7 +507,7 @@ static void riscv_host_cpu_init(Object *obj) #elif defined(TARGET_RISCV64) set_misa(env, MXL_RV64, 0); #endif - register_cpu_props(obj); + riscv_cpu_add_user_properties(obj); } #endif @@ -1508,30 +1501,16 @@ static Property riscv_cpu_extensions[] = { }; /* - * Register CPU props based on env.misa_ext. If a non-zero - * value was set, register only the required cpu->cfg.ext_* - * properties and leave. env.misa_ext = 0 means that we want - * all the default properties to be registered. + * Add CPU properties with user-facing flags. + * + * This will overwrite existing env->misa_ext values with the + * defaults set via riscv_cpu_add_misa_properties(). */ -static void register_cpu_props(Object *obj) +static void riscv_cpu_add_user_properties(Object *obj) { - RISCVCPU *cpu = RISCV_CPU(obj); Property *prop; DeviceState *dev = DEVICE(obj); - /* - * If misa_ext is not zero, set cfg properties now to - * allow them to be read during riscv_cpu_realize() - * later on. - */ - if (cpu->env.misa_ext != 0) { - /* - * We don't want to set the default riscv_cpu_extensions - * in this case. - */ - return; - } - riscv_cpu_add_misa_properties(obj); for (prop = riscv_cpu_extensions; prop && prop->name; prop++) { diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index ce92e8393d..02f26130d5 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -65,10 +65,7 @@ #define RV(x) ((target_ulong)1 << (x - 'A')) -/* - * Consider updating register_cpu_props() when adding - * new MISA bits here. - */ +/* Consider updating misa_ext_cfgs[] when adding new MISA bits here */ #define RVI RV('I') #define RVE RV('E') /* E and I are mutually exclusive */ #define RVM RV('M')