diff options
Diffstat (limited to 'target/riscv/tcg/tcg-cpu.c')
| -rw-r--r-- | target/riscv/tcg/tcg-cpu.c | 949 |
1 files changed, 949 insertions, 0 deletions
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c new file mode 100644 index 0000000000..a28918ab30 --- /dev/null +++ b/target/riscv/tcg/tcg-cpu.c @@ -0,0 +1,949 @@ +/* + * riscv TCG cpu class initialization + * + * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu + * Copyright (c) 2017-2018 SiFive, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "qemu/osdep.h" +#include "exec/exec-all.h" +#include "tcg-cpu.h" +#include "cpu.h" +#include "pmu.h" +#include "time_helper.h" +#include "qapi/error.h" +#include "qapi/visitor.h" +#include "qemu/accel.h" +#include "qemu/error-report.h" +#include "qemu/log.h" +#include "hw/core/accel-cpu.h" +#include "hw/core/tcg-cpu-ops.h" +#include "tcg/tcg.h" + +/* Hash that stores user set extensions */ +static GHashTable *multi_ext_user_opts; + +static bool cpu_cfg_ext_is_user_set(uint32_t ext_offset) +{ + return g_hash_table_contains(multi_ext_user_opts, + GUINT_TO_POINTER(ext_offset)); +} + +static void riscv_cpu_synchronize_from_tb(CPUState *cs, + const TranslationBlock *tb) +{ + if (!(tb_cflags(tb) & CF_PCREL)) { + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; + RISCVMXL xl = FIELD_EX32(tb->flags, TB_FLAGS, XL); + + tcg_debug_assert(!(cs->tcg_cflags & CF_PCREL)); + + if (xl == MXL_RV32) { + env->pc = (int32_t) tb->pc; + } else { + env->pc = tb->pc; + } + } +} + +static void riscv_restore_state_to_opc(CPUState *cs, + const TranslationBlock *tb, + const uint64_t *data) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; + RISCVMXL xl = FIELD_EX32(tb->flags, TB_FLAGS, XL); + target_ulong pc; + + if (tb_cflags(tb) & CF_PCREL) { + pc = (env->pc & TARGET_PAGE_MASK) | data[0]; + } else { + pc = data[0]; + } + + if (xl == MXL_RV32) { + env->pc = (int32_t)pc; + } else { + env->pc = pc; + } + env->bins = data[1]; +} + +static const struct TCGCPUOps riscv_tcg_ops = { + .initialize = riscv_translate_init, + .synchronize_from_tb = riscv_cpu_synchronize_from_tb, + .restore_state_to_opc = riscv_restore_state_to_opc, + +#ifndef CONFIG_USER_ONLY + .tlb_fill = riscv_cpu_tlb_fill, + .cpu_exec_interrupt = riscv_cpu_exec_interrupt, + .do_interrupt = riscv_cpu_do_interrupt, + .do_transaction_failed = riscv_cpu_do_transaction_failed, + .do_unaligned_access = riscv_cpu_do_unaligned_access, + .debug_excp_handler = riscv_cpu_debug_excp_handler, + .debug_check_breakpoint = riscv_cpu_debug_check_breakpoint, + .debug_check_watchpoint = riscv_cpu_debug_check_watchpoint, +#endif /* !CONFIG_USER_ONLY */ +}; + +static int cpu_cfg_ext_get_min_version(uint32_t ext_offset) +{ + const RISCVIsaExtData *edata; + + for (edata = isa_edata_arr; edata && edata->name; edata++) { + if (edata->ext_enable_offset != ext_offset) { + continue; + } + + return edata->min_version; + } + + g_assert_not_reached(); +} + +static void cpu_cfg_ext_auto_update(RISCVCPU *cpu, uint32_t ext_offset, + bool value) +{ + CPURISCVState *env = &cpu->env; + bool prev_val = isa_ext_is_enabled(cpu, ext_offset); + int min_version; + + if (prev_val == value) { + return; + } + + if (cpu_cfg_ext_is_user_set(ext_offset)) { + return; + } + + if (value && env->priv_ver != PRIV_VERSION_LATEST) { + /* Do not enable it if priv_ver is older than min_version */ + min_version = cpu_cfg_ext_get_min_version(ext_offset); + if (env->priv_ver < min_version) { + return; + } + } + + isa_ext_update_enabled(cpu, ext_offset, value); +} + +static void riscv_cpu_validate_misa_priv(CPURISCVState *env, Error **errp) +{ + if (riscv_has_ext(env, RVH) && env->priv_ver < PRIV_VERSION_1_12_0) { + error_setg(errp, "H extension requires priv spec 1.12.0"); + return; + } +} + +static void riscv_cpu_validate_misa_mxl(RISCVCPU *cpu, Error **errp) +{ + RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu); + CPUClass *cc = CPU_CLASS(mcc); + CPURISCVState *env = &cpu->env; + + /* Validate that MISA_MXL is set properly. */ + switch (env->misa_mxl_max) { +#ifdef TARGET_RISCV64 + case MXL_RV64: + case MXL_RV128: + cc->gdb_core_xml_file = "riscv-64bit-cpu.xml"; + break; +#endif + case MXL_RV32: + cc->gdb_core_xml_file = "riscv-32bit-cpu.xml"; + break; + default: + g_assert_not_reached(); + } + + if (env->misa_mxl_max != env->misa_mxl) { + error_setg(errp, "misa_mxl_max must be equal to misa_mxl"); + return; + } +} + +static void riscv_cpu_validate_priv_spec(RISCVCPU *cpu, Error **errp) +{ + CPURISCVState *env = &cpu->env; + int priv_version = -1; + + if (cpu->cfg.priv_spec) { + if (!g_strcmp0(cpu->cfg.priv_spec, "v1.12.0")) { + priv_version = PRIV_VERSION_1_12_0; + } else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.11.0")) { + priv_version = PRIV_VERSION_1_11_0; + } else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.10.0")) { + priv_version = PRIV_VERSION_1_10_0; + } else { + error_setg(errp, + "Unsupported privilege spec version '%s'", + cpu->cfg.priv_spec); + return; + } + + env->priv_ver = priv_version; + } +} + +static void riscv_cpu_validate_v(CPURISCVState *env, RISCVCPUConfig *cfg, + Error **errp) +{ + if (!is_power_of_2(cfg->vlen)) { + error_setg(errp, "Vector extension VLEN must be power of 2"); + return; + } + + if (cfg->vlen > RV_VLEN_MAX || cfg->vlen < 128) { + error_setg(errp, + "Vector extension implementation only supports VLEN " + "in the range [128, %d]", RV_VLEN_MAX); + return; + } + + if (!is_power_of_2(cfg->elen)) { + error_setg(errp, "Vector extension ELEN must be power of 2"); + return; + } + + if (cfg->elen > 64 || cfg->elen < 8) { + error_setg(errp, + "Vector extension implementation only supports ELEN " + "in the range [8, 64]"); + return; + } + + if (cfg->vext_spec) { + if (!g_strcmp0(cfg->vext_spec, "v1.0")) { + env->vext_ver = VEXT_VERSION_1_00_0; + } else { + error_setg(errp, "Unsupported vector spec version '%s'", + cfg->vext_spec); + return; + } + } else if (env->vext_ver == 0) { + qemu_log("vector version is not specified, " + "use the default value v1.0\n"); + + env->vext_ver = VEXT_VERSION_1_00_0; + } +} + +static void riscv_cpu_disable_priv_spec_isa_exts(RISCVCPU *cpu) +{ + CPURISCVState *env = &cpu->env; + const RISCVIsaExtData *edata; + + /* Force disable extensions if priv spec version does not match */ + for (edata = isa_edata_arr; edata && edata->name; edata++) { + if (isa_ext_is_enabled(cpu, edata->ext_enable_offset) && + (env->priv_ver < edata->min_version)) { + isa_ext_update_enabled(cpu, edata->ext_enable_offset, false); +#ifndef CONFIG_USER_ONLY + warn_report("disabling %s extension for hart 0x" TARGET_FMT_lx + " because privilege spec version does not match", + edata->name, env->mhartid); +#else + warn_report("disabling %s extension because " + "privilege spec version does not match", + edata->name); +#endif + } + } +} + +/* + * Check consistency between chosen extensions while setting + * cpu->cfg accordingly. + */ +void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp) +{ + CPURISCVState *env = &cpu->env; + Error *local_err = NULL; + + /* Do some ISA extension error checking */ + if (riscv_has_ext(env, RVG) && + !(riscv_has_ext(env, RVI) && riscv_has_ext(env, RVM) && + riscv_has_ext(env, RVA) && riscv_has_ext(env, RVF) && + riscv_has_ext(env, RVD) && + cpu->cfg.ext_icsr && cpu->cfg.ext_ifencei)) { + + if (cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_icsr)) && + !cpu->cfg.ext_icsr) { + error_setg(errp, "RVG requires Zicsr but user set Zicsr to false"); + return; + } + + if (cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_ifencei)) && + !cpu->cfg.ext_ifencei) { + error_setg(errp, "RVG requires Zifencei but user set " + "Zifencei to false"); + return; + } + + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_icsr), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_ifencei), true); + + env->misa_ext |= RVI | RVM | RVA | RVF | RVD; + env->misa_ext_mask |= RVI | RVM | RVA | RVF | RVD; + } + + if (riscv_has_ext(env, RVI) && riscv_has_ext(env, RVE)) { + error_setg(errp, + "I and E extensions are incompatible"); + return; + } + + if (!riscv_has_ext(env, RVI) && !riscv_has_ext(env, RVE)) { + error_setg(errp, + "Either I or E extension must be set"); + return; + } + + if (riscv_has_ext(env, RVS) && !riscv_has_ext(env, RVU)) { + error_setg(errp, + "Setting S extension without U extension is illegal"); + return; + } + + if (riscv_has_ext(env, RVH) && !riscv_has_ext(env, RVI)) { + error_setg(errp, + "H depends on an I base integer ISA with 32 x registers"); + return; + } + + if (riscv_has_ext(env, RVH) && !riscv_has_ext(env, RVS)) { + error_setg(errp, "H extension implicitly requires S-mode"); + return; + } + + if (riscv_has_ext(env, RVF) && !cpu->cfg.ext_icsr) { + error_setg(errp, "F extension requires Zicsr"); + return; + } + + if ((cpu->cfg.ext_zawrs) && !riscv_has_ext(env, RVA)) { + error_setg(errp, "Zawrs extension requires A extension"); + return; + } + + if (cpu->cfg.ext_zfa && !riscv_has_ext(env, RVF)) { + error_setg(errp, "Zfa extension requires F extension"); + return; + } + + if (cpu->cfg.ext_zfh) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zfhmin), true); + } + + if (cpu->cfg.ext_zfhmin && !riscv_has_ext(env, RVF)) { + error_setg(errp, "Zfh/Zfhmin extensions require F extension"); + return; + } + + if (cpu->cfg.ext_zfbfmin && !riscv_has_ext(env, RVF)) { + error_setg(errp, "Zfbfmin extension depends on F extension"); + return; + } + + if (riscv_has_ext(env, RVD) && !riscv_has_ext(env, RVF)) { + error_setg(errp, "D extension requires F extension"); + return; + } + + if (riscv_has_ext(env, RVV)) { + riscv_cpu_validate_v(env, &cpu->cfg, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return; + } + + /* The V vector extension depends on the Zve64d extension */ + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve64d), true); + } + + /* The Zve64d extension depends on the Zve64f extension */ + if (cpu->cfg.ext_zve64d) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve64f), true); + } + + /* The Zve64f extension depends on the Zve32f extension */ + if (cpu->cfg.ext_zve64f) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve32f), true); + } + + if (cpu->cfg.ext_zve64d && !riscv_has_ext(env, RVD)) { + error_setg(errp, "Zve64d/V extensions require D extension"); + return; + } + + if (cpu->cfg.ext_zve32f && !riscv_has_ext(env, RVF)) { + error_setg(errp, "Zve32f/Zve64f extensions require F extension"); + return; + } + + if (cpu->cfg.ext_zvfh) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zvfhmin), true); + } + + if (cpu->cfg.ext_zvfhmin && !cpu->cfg.ext_zve32f) { + error_setg(errp, "Zvfh/Zvfhmin extensions require Zve32f extension"); + return; + } + + if (cpu->cfg.ext_zvfh && !cpu->cfg.ext_zfhmin) { + error_setg(errp, "Zvfh extensions requires Zfhmin extension"); + return; + } + + if (cpu->cfg.ext_zvfbfmin && !cpu->cfg.ext_zfbfmin) { + error_setg(errp, "Zvfbfmin extension depends on Zfbfmin extension"); + return; + } + + if (cpu->cfg.ext_zvfbfmin && !cpu->cfg.ext_zve32f) { + error_setg(errp, "Zvfbfmin extension depends on Zve32f extension"); + return; + } + + if (cpu->cfg.ext_zvfbfwma && !cpu->cfg.ext_zvfbfmin) { + error_setg(errp, "Zvfbfwma extension depends on Zvfbfmin extension"); + return; + } + + /* Set the ISA extensions, checks should have happened above */ + if (cpu->cfg.ext_zhinx) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zca), true); + } + + if ((cpu->cfg.ext_zdinx || cpu->cfg.ext_zhinxmin) && !cpu->cfg.ext_zfinx) { + error_setg(errp, "Zdinx/Zhinx/Zhinxmin extensions require Zfinx"); + return; + } + + if (cpu->cfg.ext_zfinx) { + if (!cpu->cfg.ext_icsr) { + error_setg(errp, "Zfinx extension requires Zicsr"); + return; + } + if (riscv_has_ext(env, RVF)) { + error_setg(errp, + "Zfinx cannot be supported together with F extension"); + return; + } + } + + if (cpu->cfg.ext_zce) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zca), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcb), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcmp), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcmt), true); + if (riscv_has_ext(env, RVF) && env->misa_mxl_max == MXL_RV32) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcf), true); + } + } + + /* zca, zcd and zcf has a PRIV 1.12.0 restriction */ + if (riscv_has_ext(env, RVC) && env->priv_ver >= PRIV_VERSION_1_12_0) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zca), true); + if (riscv_has_ext(env, RVF) && env->misa_mxl_max == MXL_RV32) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcf), true); + } + if (riscv_has_ext(env, RVD)) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zcd), true); + } + } + + if (env->misa_mxl_max != MXL_RV32 && cpu->cfg.ext_zcf) { + error_setg(errp, "Zcf extension is only relevant to RV32"); + return; + } + + if (!riscv_has_ext(env, RVF) && cpu->cfg.ext_zcf) { + error_setg(errp, "Zcf extension requires F extension"); + return; + } + + if (!riscv_has_ext(env, RVD) && cpu->cfg.ext_zcd) { + error_setg(errp, "Zcd extension requires D extension"); + return; + } + + if ((cpu->cfg.ext_zcf || cpu->cfg.ext_zcd || cpu->cfg.ext_zcb || + cpu->cfg.ext_zcmp || cpu->cfg.ext_zcmt) && !cpu->cfg.ext_zca) { + error_setg(errp, "Zcf/Zcd/Zcb/Zcmp/Zcmt extensions require Zca " + "extension"); + return; + } + + if (cpu->cfg.ext_zcd && (cpu->cfg.ext_zcmp || cpu->cfg.ext_zcmt)) { + error_setg(errp, "Zcmp/Zcmt extensions are incompatible with " + "Zcd extension"); + return; + } + + if (cpu->cfg.ext_zcmt && !cpu->cfg.ext_icsr) { + error_setg(errp, "Zcmt extension requires Zicsr extension"); + return; + } + + /* + * In principle Zve*x would also suffice here, were they supported + * in qemu + */ + if ((cpu->cfg.ext_zvbb || cpu->cfg.ext_zvkg || cpu->cfg.ext_zvkned || + cpu->cfg.ext_zvknha || cpu->cfg.ext_zvksed || cpu->cfg.ext_zvksh) && + !cpu->cfg.ext_zve32f) { + error_setg(errp, + "Vector crypto extensions require V or Zve* extensions"); + return; + } + + if ((cpu->cfg.ext_zvbc || cpu->cfg.ext_zvknhb) && !cpu->cfg.ext_zve64f) { + error_setg( + errp, + "Zvbc and Zvknhb extensions require V or Zve64{f,d} extensions"); + return; + } + + if (cpu->cfg.ext_zk) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zkn), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zkr), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zkt), true); + } + + if (cpu->cfg.ext_zkn) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zbkb), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zbkc), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zbkx), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zkne), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zknd), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zknh), true); + } + + if (cpu->cfg.ext_zks) { + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zbkb), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zbkc), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zbkx), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zksed), true); + cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zksh), true); + } + + /* + * Disable isa extensions based on priv spec after we + * validated and set everything we need. + */ + riscv_cpu_disable_priv_spec_isa_exts(cpu); +} + +static bool riscv_cpu_is_generic(Object *cpu_obj) +{ + return object_dynamic_cast(cpu_obj, TYPE_RISCV_DYNAMIC_CPU) != NULL; +} + +/* + * We'll get here via the following path: + * + * riscv_cpu_realize() + * -> cpu_exec_realizefn() + * -> tcg_cpu_realize() (via accel_cpu_common_realize()) + */ +static bool tcg_cpu_realize(CPUState *cs, Error **errp) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; + Error *local_err = NULL; + + if (object_dynamic_cast(OBJECT(cpu), TYPE_RISCV_CPU_HOST)) { + g_autofree char *name = riscv_cpu_get_name(cpu); + error_setg(errp, "'%s' CPU is not compatible with TCG acceleration", + name); + return false; + } + + riscv_cpu_validate_misa_mxl(cpu, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return false; + } + + riscv_cpu_validate_priv_spec(cpu, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return false; + } + + riscv_cpu_validate_misa_priv(env, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return false; + } + + if (cpu->cfg.epmp && !cpu->cfg.pmp) { + /* + * Enhanced PMP should only be available + * on harts with PMP support + */ + error_setg(errp, "Invalid configuration: EPMP requires PMP support"); + return false; + } + + riscv_cpu_validate_set_extensions(cpu, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return false; + } + +#ifndef CONFIG_USER_ONLY + CPU(cs)->tcg_cflags |= CF_PCREL; + + if (cpu->cfg.ext_sstc) { + riscv_timer_init(cpu); + } + + if (cpu->cfg.pmu_num) { + if (!riscv_pmu_init(cpu, cpu->cfg.pmu_num) && cpu->cfg.ext_sscofpmf) { + cpu->pmu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, + riscv_pmu_timer_cb, cpu); + } + } +#endif + + return true; +} + +typedef struct RISCVCPUMisaExtConfig { + target_ulong misa_bit; + bool enabled; +} RISCVCPUMisaExtConfig; + +static void cpu_set_misa_ext_cfg(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + const RISCVCPUMisaExtConfig *misa_ext_cfg = opaque; + target_ulong misa_bit = misa_ext_cfg->misa_bit; + RISCVCPU *cpu = RISCV_CPU(obj); + CPURISCVState *env = &cpu->env; + bool generic_cpu = riscv_cpu_is_generic(obj); + bool prev_val, value; + + if (!visit_type_bool(v, name, &value, errp)) { + return; + } + + prev_val = env->misa_ext & misa_bit; + + if (value == prev_val) { + return; + } + + if (value) { + if (!generic_cpu) { + g_autofree char *cpuname = riscv_cpu_get_name(cpu); + error_setg(errp, "'%s' CPU does not allow enabling extensions", + cpuname); + return; + } + + env->misa_ext |= misa_bit; + env->misa_ext_mask |= misa_bit; + } else { + env->misa_ext &= ~misa_bit; + env->misa_ext_mask &= ~misa_bit; + } +} + +static void cpu_get_misa_ext_cfg(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + const RISCVCPUMisaExtConfig *misa_ext_cfg = opaque; + target_ulong misa_bit = misa_ext_cfg->misa_bit; + RISCVCPU *cpu = RISCV_CPU(obj); + CPURISCVState *env = &cpu->env; + bool value; + + value = env->misa_ext & misa_bit; + + visit_type_bool(v, name, &value, errp); +} + +#define MISA_CFG(_bit, _enabled) \ + {.misa_bit = _bit, .enabled = _enabled} + +static const RISCVCPUMisaExtConfig misa_ext_cfgs[] = { + MISA_CFG(RVA, true), + MISA_CFG(RVC, true), + MISA_CFG(RVD, true), + MISA_CFG(RVF, true), + MISA_CFG(RVI, true), + MISA_CFG(RVE, false), + MISA_CFG(RVM, true), + MISA_CFG(RVS, true), + MISA_CFG(RVU, true), + MISA_CFG(RVH, true), + MISA_CFG(RVJ, false), + MISA_CFG(RVV, false), + MISA_CFG(RVG, false), +}; + +/* + * We do not support user choice tracking for MISA + * extensions yet because, so far, we do not silently + * change MISA bits during realize() (RVG enables MISA + * bits but the user is warned about it). + */ +static void riscv_cpu_add_misa_properties(Object *cpu_obj) +{ + bool use_def_vals = riscv_cpu_is_generic(cpu_obj); + int i; + + for (i = 0; i < ARRAY_SIZE(misa_ext_cfgs); i++) { + const RISCVCPUMisaExtConfig *misa_cfg = &misa_ext_cfgs[i]; + int bit = misa_cfg->misa_bit; + const char *name = riscv_get_misa_ext_name(bit); + const char *desc = riscv_get_misa_ext_description(bit); + + /* Check if KVM already created the property */ + if (object_property_find(cpu_obj, name)) { + continue; + } + + object_property_add(cpu_obj, name, "bool", + cpu_get_misa_ext_cfg, + cpu_set_misa_ext_cfg, + NULL, (void *)misa_cfg); + object_property_set_description(cpu_obj, name, desc); + if (use_def_vals) { + object_property_set_bool(cpu_obj, name, misa_cfg->enabled, NULL); + } + } +} + +static bool cpu_ext_is_deprecated(const char *ext_name) +{ + return isupper(ext_name[0]); +} + +/* + * String will be allocated in the heap. Caller is responsible + * for freeing it. + */ +static char *cpu_ext_to_lower(const char *ext_name) +{ + char *ret = g_malloc0(strlen(ext_name) + 1); + + strcpy(ret, ext_name); + ret[0] = tolower(ret[0]); + + return ret; +} + +static void cpu_set_multi_ext_cfg(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + const RISCVCPUMultiExtConfig *multi_ext_cfg = opaque; + RISCVCPU *cpu = RISCV_CPU(obj); + bool generic_cpu = riscv_cpu_is_generic(obj); + bool prev_val, value; + + if (!visit_type_bool(v, name, &value, errp)) { + return; + } + + if (cpu_ext_is_deprecated(multi_ext_cfg->name)) { + g_autofree char *lower = cpu_ext_to_lower(multi_ext_cfg->name); + + warn_report("CPU property '%s' is deprecated. Please use '%s' instead", + multi_ext_cfg->name, lower); + } + + g_hash_table_insert(multi_ext_user_opts, + GUINT_TO_POINTER(multi_ext_cfg->offset), + (gpointer)value); + + prev_val = isa_ext_is_enabled(cpu, multi_ext_cfg->offset); + + if (value == prev_val) { + return; + } + + if (value && !generic_cpu) { + g_autofree char *cpuname = riscv_cpu_get_name(cpu); + error_setg(errp, "'%s' CPU does not allow enabling extensions", + cpuname); + return; + } + + isa_ext_update_enabled(cpu, multi_ext_cfg->offset, value); +} + +static void cpu_get_multi_ext_cfg(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + const RISCVCPUMultiExtConfig *multi_ext_cfg = opaque; + bool value = isa_ext_is_enabled(RISCV_CPU(obj), multi_ext_cfg->offset); + + visit_type_bool(v, name, &value, errp); +} + +static void cpu_add_multi_ext_prop(Object *cpu_obj, + const RISCVCPUMultiExtConfig *multi_cfg) +{ + bool generic_cpu = riscv_cpu_is_generic(cpu_obj); + bool deprecated_ext = cpu_ext_is_deprecated(multi_cfg->name); + + object_property_add(cpu_obj, multi_cfg->name, "bool", + cpu_get_multi_ext_cfg, + cpu_set_multi_ext_cfg, + NULL, (void *)multi_cfg); + + if (!generic_cpu || deprecated_ext) { + return; + } + + /* + * Set def val directly instead of using + * object_property_set_bool() to save the set() + * callback hash for user inputs. + */ + isa_ext_update_enabled(RISCV_CPU(cpu_obj), multi_cfg->offset, + multi_cfg->enabled); +} + +static void riscv_cpu_add_multiext_prop_array(Object *obj, + const RISCVCPUMultiExtConfig *array) +{ + const RISCVCPUMultiExtConfig *prop; + + g_assert(array); + + for (prop = array; prop && prop->name; prop++) { + cpu_add_multi_ext_prop(obj, prop); + } +} + +/* + * 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 riscv_cpu_add_user_properties(Object *obj) +{ +#ifndef CONFIG_USER_ONLY + riscv_add_satp_mode_properties(obj); +#endif + + riscv_cpu_add_misa_properties(obj); + + riscv_cpu_add_multiext_prop_array(obj, riscv_cpu_extensions); + riscv_cpu_add_multiext_prop_array(obj, riscv_cpu_vendor_exts); + riscv_cpu_add_multiext_prop_array(obj, riscv_cpu_experimental_exts); + + riscv_cpu_add_multiext_prop_array(obj, riscv_cpu_deprecated_exts); + + for (Property *prop = riscv_cpu_options; prop && prop->name; prop++) { + qdev_property_add_static(DEVICE(obj), prop); + } +} + +/* + * The 'max' type CPU will have all possible ratified + * non-vendor extensions enabled. + */ +static void riscv_init_max_cpu_extensions(Object *obj) +{ + RISCVCPU *cpu = RISCV_CPU(obj); + CPURISCVState *env = &cpu->env; + const RISCVCPUMultiExtConfig *prop; + + /* Enable RVG, RVJ and RVV that are disabled by default */ + riscv_cpu_set_misa(env, env->misa_mxl, env->misa_ext | RVG | RVJ | RVV); + + for (prop = riscv_cpu_extensions; prop && prop->name; prop++) { + isa_ext_update_enabled(cpu, prop->offset, true); + } + + /* set vector version */ + env->vext_ver = VEXT_VERSION_1_00_0; + + /* Zfinx is not compatible with F. Disable it */ + isa_ext_update_enabled(cpu, CPU_CFG_OFFSET(ext_zfinx), false); + isa_ext_update_enabled(cpu, CPU_CFG_OFFSET(ext_zdinx), false); + isa_ext_update_enabled(cpu, CPU_CFG_OFFSET(ext_zhinx), false); + isa_ext_update_enabled(cpu, CPU_CFG_OFFSET(ext_zhinxmin), false); + + isa_ext_update_enabled(cpu, CPU_CFG_OFFSET(ext_zce), false); + isa_ext_update_enabled(cpu, CPU_CFG_OFFSET(ext_zcmp), false); + isa_ext_update_enabled(cpu, CPU_CFG_OFFSET(ext_zcmt), false); + + if (env->misa_mxl != MXL_RV32) { + isa_ext_update_enabled(cpu, CPU_CFG_OFFSET(ext_zcf), false); + } +} + +static bool riscv_cpu_has_max_extensions(Object *cpu_obj) +{ + return object_dynamic_cast(cpu_obj, TYPE_RISCV_CPU_MAX) != NULL; +} + +static void tcg_cpu_instance_init(CPUState *cs) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + Object *obj = OBJECT(cpu); + + multi_ext_user_opts = g_hash_table_new(NULL, g_direct_equal); + riscv_cpu_add_user_properties(obj); + + if (riscv_cpu_has_max_extensions(obj)) { + riscv_init_max_cpu_extensions(obj); + } +} + +static void tcg_cpu_init_ops(AccelCPUClass *accel_cpu, CPUClass *cc) +{ + /* + * All cpus use the same set of operations. + */ + cc->tcg_ops = &riscv_tcg_ops; +} + +static void tcg_cpu_class_init(CPUClass *cc) +{ + cc->init_accel_cpu = tcg_cpu_init_ops; +} + +static void tcg_cpu_accel_class_init(ObjectClass *oc, void *data) +{ + AccelCPUClass *acc = ACCEL_CPU_CLASS(oc); + + acc->cpu_class_init = tcg_cpu_class_init; + acc->cpu_instance_init = tcg_cpu_instance_init; + acc->cpu_target_realize = tcg_cpu_realize; +} + +static const TypeInfo tcg_cpu_accel_type_info = { + .name = ACCEL_CPU_NAME("tcg"), + + .parent = TYPE_ACCEL_CPU, + .class_init = tcg_cpu_accel_class_init, + .abstract = true, +}; + +static void tcg_cpu_accel_register_types(void) +{ + type_register_static(&tcg_cpu_accel_type_info); +} +type_init(tcg_cpu_accel_register_types); |