diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 1718a213c2..1b11e9098b 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -58,6 +58,15 @@ bool riscv_cpu_is_32bit(RISCVCPU *cpu) return riscv_cpu_mxl(&cpu->env) == MXL_RV32; } +/* Hash that stores general user set numeric options */ +static GHashTable *general_user_opts; + +static void cpu_option_add_user_setting(const char *optname, uint32_t value) +{ + g_hash_table_insert(general_user_opts, (gpointer)optname, + GUINT_TO_POINTER(value)); +} + #define ISA_EXT_DATA_ENTRY(_name, _min_ver, _prop) \ {#_name, _min_ver, CPU_CFG_OFFSET(_prop)} @@ -1268,11 +1277,15 @@ static void riscv_cpu_post_init(Object *obj) static void riscv_cpu_init(Object *obj) { + RISCVCPU *cpu = RISCV_CPU(obj); + #ifndef CONFIG_USER_ONLY qdev_init_gpio_in(DEVICE(obj), riscv_cpu_set_irq, IRQ_LOCAL_MAX + IRQ_LOCAL_GUEST_MAX); #endif /* CONFIG_USER_ONLY */ + general_user_opts = g_hash_table_new(g_str_hash, g_str_equal); + /* * The timer and performance counters extensions were supported * in QEMU before they were added as discrete extensions in the @@ -1282,6 +1295,9 @@ static void riscv_cpu_init(Object *obj) */ RISCV_CPU(obj)->cfg.ext_zicntr = true; RISCV_CPU(obj)->cfg.ext_zihpm = true; + + /* Default values for non-bool cpu properties */ + cpu->cfg.pmu_mask = MAKE_64BIT_MASK(3, 16); } typedef struct misa_ext_info { @@ -1491,26 +1507,46 @@ const RISCVCPUMultiExtConfig riscv_cpu_deprecated_exts[] = { DEFINE_PROP_END_OF_LIST(), }; +static void cpu_set_prop_err(RISCVCPU *cpu, const char *propname, + Error **errp) +{ + g_autofree char *cpuname = riscv_cpu_get_name(cpu); + error_setg(errp, "CPU '%s' does not allow changing the value of '%s'", + cpuname, propname); +} + static void prop_pmu_num_set(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { RISCVCPU *cpu = RISCV_CPU(obj); - uint8_t pmu_num; + uint8_t pmu_num, curr_pmu_num; + uint32_t pmu_mask; visit_type_uint8(v, name, &pmu_num, errp); + curr_pmu_num = ctpop32(cpu->cfg.pmu_mask); + + if (pmu_num != curr_pmu_num && riscv_cpu_is_vendor(obj)) { + cpu_set_prop_err(cpu, name, errp); + error_append_hint(errp, "Current '%s' val: %u\n", + name, curr_pmu_num); + return; + } + if (pmu_num > (RV_MAX_MHPMCOUNTERS - 3)) { error_setg(errp, "Number of counters exceeds maximum available"); return; } if (pmu_num == 0) { - cpu->cfg.pmu_mask = 0; + pmu_mask = 0; } else { - cpu->cfg.pmu_mask = MAKE_64BIT_MASK(3, pmu_num); + pmu_mask = MAKE_64BIT_MASK(3, pmu_num); } warn_report("\"pmu-num\" property is deprecated; use \"pmu-mask\""); + cpu->cfg.pmu_mask = pmu_mask; + cpu_option_add_user_setting("pmu-mask", pmu_mask); } static void prop_pmu_num_get(Object *obj, Visitor *v, const char *name, @@ -1522,16 +1558,54 @@ static void prop_pmu_num_get(Object *obj, Visitor *v, const char *name, visit_type_uint8(v, name, &pmu_num, errp); } -const PropertyInfo prop_pmu_num = { +static const PropertyInfo prop_pmu_num = { .name = "pmu-num", .get = prop_pmu_num_get, .set = prop_pmu_num_set, }; -Property riscv_cpu_options[] = { - DEFINE_PROP_UINT32("pmu-mask", RISCVCPU, cfg.pmu_mask, MAKE_64BIT_MASK(3, 16)), - {.name = "pmu-num", .info = &prop_pmu_num}, /* Deprecated */ +static void prop_pmu_mask_set(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + RISCVCPU *cpu = RISCV_CPU(obj); + uint32_t value; + uint8_t pmu_num; + visit_type_uint32(v, name, &value, errp); + + if (value != cpu->cfg.pmu_mask && riscv_cpu_is_vendor(obj)) { + cpu_set_prop_err(cpu, name, errp); + error_append_hint(errp, "Current '%s' val: %x\n", + name, cpu->cfg.pmu_mask); + return; + } + + pmu_num = ctpop32(value); + + if (pmu_num > (RV_MAX_MHPMCOUNTERS - 3)) { + error_setg(errp, "Number of counters exceeds maximum available"); + return; + } + + cpu_option_add_user_setting(name, value); + cpu->cfg.pmu_mask = value; +} + +static void prop_pmu_mask_get(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + uint8_t pmu_mask = RISCV_CPU(obj)->cfg.pmu_mask; + + visit_type_uint8(v, name, &pmu_mask, errp); +} + +static const PropertyInfo prop_pmu_mask = { + .name = "pmu-mask", + .get = prop_pmu_mask_get, + .set = prop_pmu_mask_set, +}; + +Property riscv_cpu_options[] = { DEFINE_PROP_BOOL("mmu", RISCVCPU, cfg.mmu, true), DEFINE_PROP_BOOL("pmp", RISCVCPU, cfg.pmp, true), @@ -1618,6 +1692,9 @@ RISCVCPUProfile *riscv_profiles[] = { static Property riscv_cpu_properties[] = { DEFINE_PROP_BOOL("debug", RISCVCPU, cfg.debug, true), + {.name = "pmu-mask", .info = &prop_pmu_mask}, + {.name = "pmu-num", .info = &prop_pmu_num}, /* Deprecated */ + #ifndef CONFIG_USER_ONLY DEFINE_PROP_UINT64("resetvec", RISCVCPU, env.resetvec, DEFAULT_RSTVEC), #endif