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qemu / qemu / f1912e48244816d071b2836052c54845ba57343c / . / target / riscv / tcg / tcg-cpu.c
blob: b8814ab753bd61c0df96ab0f821ed649d9a182a6 [file] [log] [blame]
/*
* 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 "internals.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"
#ifndef CONFIG_USER_ONLY
#include "hw/boards.h"
#endif
/* Hash that stores user set extensions */
static GHashTable *multi_ext_user_opts;
static GHashTable *misa_ext_user_opts;
static GHashTable *multi_ext_implied_rules;
static GHashTable *misa_ext_implied_rules;
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 bool cpu_misa_ext_is_user_set(uint32_t misa_bit)
{
return g_hash_table_contains(misa_ext_user_opts,
GUINT_TO_POINTER(misa_bit));
}
static void cpu_cfg_ext_add_user_opt(uint32_t ext_offset, bool value)
{
g_hash_table_insert(multi_ext_user_opts, GUINT_TO_POINTER(ext_offset),
(gpointer)value);
}
static void cpu_misa_ext_add_user_opt(uint32_t bit, bool value)
{
g_hash_table_insert(misa_ext_user_opts, GUINT_TO_POINTER(bit),
(gpointer)value);
}
static void riscv_cpu_write_misa_bit(RISCVCPU *cpu, uint32_t bit,
bool enabled)
{
CPURISCVState *env = &cpu->env;
if (enabled) {
env->misa_ext |= bit;
env->misa_ext_mask |= bit;
} else {
env->misa_ext &= ~bit;
env->misa_ext_mask &= ~bit;
}
}
static const char *cpu_priv_ver_to_str(int priv_ver)
{
const char *priv_spec_str = priv_spec_to_str(priv_ver);
g_assert(priv_spec_str);
return priv_spec_str;
}
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(!tcg_cflags_has(cs, 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 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,
.cpu_exec_halt = riscv_cpu_has_work,
.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 const char *cpu_cfg_ext_get_name(uint32_t ext_offset)
{
const RISCVCPUMultiExtConfig *feat;
const RISCVIsaExtData *edata;
for (edata = isa_edata_arr; edata->name != NULL; edata++) {
if (edata->ext_enable_offset == ext_offset) {
return edata->name;
}
}
for (feat = riscv_cpu_named_features; feat->name != NULL; feat++) {
if (feat->offset == ext_offset) {
return feat->name;
}
}
g_assert_not_reached();
}
static bool cpu_cfg_offset_is_named_feat(uint32_t ext_offset)
{
const RISCVCPUMultiExtConfig *feat;
for (feat = riscv_cpu_named_features; feat->name != NULL; feat++) {
if (feat->offset == ext_offset) {
return true;
}
}
return false;
}
static void riscv_cpu_enable_named_feat(RISCVCPU *cpu, uint32_t feat_offset)
{
/*
* All other named features are already enabled
* in riscv_tcg_cpu_instance_init().
*/
if (feat_offset == CPU_CFG_OFFSET(ext_zic64b)) {
cpu->cfg.cbom_blocksize = 64;
cpu->cfg.cbop_blocksize = 64;
cpu->cfg.cboz_blocksize = 64;
}
}
static void cpu_bump_multi_ext_priv_ver(CPURISCVState *env,
uint32_t ext_offset)
{
int ext_priv_ver;
if (env->priv_ver == PRIV_VERSION_LATEST) {
return;
}
ext_priv_ver = cpu_cfg_ext_get_min_version(ext_offset);
if (env->priv_ver < ext_priv_ver) {
/*
* Note: the 'priv_spec' command line option, if present,
* will take precedence over this priv_ver bump.
*/
env->priv_ver = ext_priv_ver;
}
}
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_v(CPURISCVState *env, RISCVCPUConfig *cfg,
Error **errp)
{
uint32_t vlen = cfg->vlenb << 3;
if (vlen > RV_VLEN_MAX || vlen < 128) {
error_setg(errp,
"Vector extension implementation only supports VLEN "
"in the range [128, %d]", RV_VLEN_MAX);
return;
}
if (cfg->elen > 64 || cfg->elen < 8) {
error_setg(errp,
"Vector extension implementation only supports ELEN "
"in the range [8, 64]");
return;
}
}
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)) {
/*
* These two extensions are always enabled as they were supported
* by QEMU before they were added as extensions in the ISA.
*/
if (!strcmp(edata->name, "zicntr") ||
!strcmp(edata->name, "zihpm")) {
continue;
}
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
}
}
}
static void riscv_cpu_update_named_features(RISCVCPU *cpu)
{
if (cpu->env.priv_ver >= PRIV_VERSION_1_11_0) {
cpu->cfg.has_priv_1_11 = true;
}
if (cpu->env.priv_ver >= PRIV_VERSION_1_12_0) {
cpu->cfg.has_priv_1_12 = true;
}
if (cpu->env.priv_ver >= PRIV_VERSION_1_13_0) {
cpu->cfg.has_priv_1_13 = true;
}
/* zic64b is 1.12 or later */
cpu->cfg.ext_zic64b = cpu->cfg.cbom_blocksize == 64 &&
cpu->cfg.cbop_blocksize == 64 &&
cpu->cfg.cboz_blocksize == 64 &&
cpu->cfg.has_priv_1_12;
}
static void riscv_cpu_validate_g(RISCVCPU *cpu)
{
const char *warn_msg = "RVG mandates disabled extension %s";
uint32_t g_misa_bits[] = {RVI, RVM, RVA, RVF, RVD};
bool send_warn = cpu_misa_ext_is_user_set(RVG);
for (int i = 0; i < ARRAY_SIZE(g_misa_bits); i++) {
uint32_t bit = g_misa_bits[i];
if (riscv_has_ext(&cpu->env, bit)) {
continue;
}
if (!cpu_misa_ext_is_user_set(bit)) {
riscv_cpu_write_misa_bit(cpu, bit, true);
continue;
}
if (send_warn) {
warn_report(warn_msg, riscv_get_misa_ext_name(bit));
}
}
if (!cpu->cfg.ext_zicsr) {
if (!cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_zicsr))) {
cpu->cfg.ext_zicsr = true;
} else if (send_warn) {
warn_report(warn_msg, "zicsr");
}
}
if (!cpu->cfg.ext_zifencei) {
if (!cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_zifencei))) {
cpu->cfg.ext_zifencei = true;
} else if (send_warn) {
warn_report(warn_msg, "zifencei");
}
}
}
static void riscv_cpu_validate_b(RISCVCPU *cpu)
{
const char *warn_msg = "RVB mandates disabled extension %s";
if (!cpu->cfg.ext_zba) {
if (!cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_zba))) {
cpu->cfg.ext_zba = true;
} else {
warn_report(warn_msg, "zba");
}
}
if (!cpu->cfg.ext_zbb) {
if (!cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_zbb))) {
cpu->cfg.ext_zbb = true;
} else {
warn_report(warn_msg, "zbb");
}
}
if (!cpu->cfg.ext_zbs) {
if (!cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_zbs))) {
cpu->cfg.ext_zbs = true;
} else {
warn_report(warn_msg, "zbs");
}
}
}
/*
* Check consistency between chosen extensions while setting
* cpu->cfg accordingly.
*/
void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
{
RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu);
CPURISCVState *env = &cpu->env;
Error *local_err = NULL;
if (riscv_has_ext(env, RVG)) {
riscv_cpu_validate_g(cpu);
}
if (riscv_has_ext(env, RVB)) {
riscv_cpu_validate_b(cpu);
}
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_zicsr) {
error_setg(errp, "F extension requires Zicsr");
return;
}
if ((cpu->cfg.ext_zacas) && !riscv_has_ext(env, RVA)) {
error_setg(errp, "Zacas extension requires A extension");
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_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 Zve64d extension depends on the Zve64f extension */
if (cpu->cfg.ext_zve64d) {
if (!riscv_has_ext(env, RVD)) {
error_setg(errp, "Zve64d/V extensions require D extension");
return;
}
}
/* The Zve32f extension depends on the Zve32x extension */
if (cpu->cfg.ext_zve32f) {
if (!riscv_has_ext(env, RVF)) {
error_setg(errp, "Zve32f/Zve64f extensions require F extension");
return;
}
}
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_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;
}
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_zicsr) {
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_zcmop && !cpu->cfg.ext_zca) {
error_setg(errp, "Zcmop extensions require Zca");
return;
}
if (mcc->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_zicsr) {
error_setg(errp, "Zcmt extension requires Zicsr extension");
return;
}
if ((cpu->cfg.ext_zvbb || cpu->cfg.ext_zvkb || cpu->cfg.ext_zvkg ||
cpu->cfg.ext_zvkned || cpu->cfg.ext_zvknha || cpu->cfg.ext_zvksed ||
cpu->cfg.ext_zvksh) && !cpu->cfg.ext_zve32x) {
error_setg(errp,
"Vector crypto extensions require V or Zve* extensions");
return;
}
if ((cpu->cfg.ext_zvbc || cpu->cfg.ext_zvknhb) && !cpu->cfg.ext_zve64x) {
error_setg(
errp,
"Zvbc and Zvknhb extensions require V or Zve64x extensions");
return;
}
if (cpu->cfg.ext_zicntr && !cpu->cfg.ext_zicsr) {
if (cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_zicntr))) {
error_setg(errp, "zicntr requires zicsr");
return;
}
cpu->cfg.ext_zicntr = false;
}
if (cpu->cfg.ext_zihpm && !cpu->cfg.ext_zicsr) {
if (cpu_cfg_ext_is_user_set(CPU_CFG_OFFSET(ext_zihpm))) {
error_setg(errp, "zihpm requires zicsr");
return;
}
cpu->cfg.ext_zihpm = false;
}
if (!cpu->cfg.ext_zihpm) {
cpu->cfg.pmu_mask = 0;
cpu->pmu_avail_ctrs = 0;
}
/*
* Disable isa extensions based on priv spec after we
* validated and set everything we need.
*/
riscv_cpu_disable_priv_spec_isa_exts(cpu);
}
#ifndef CONFIG_USER_ONLY
static bool riscv_cpu_validate_profile_satp(RISCVCPU *cpu,
RISCVCPUProfile *profile,
bool send_warn)
{
int satp_max = satp_mode_max_from_map(cpu->cfg.satp_mode.supported);
if (profile->satp_mode > satp_max) {
if (send_warn) {
bool is_32bit = riscv_cpu_is_32bit(cpu);
const char *req_satp = satp_mode_str(profile->satp_mode, is_32bit);
const char *cur_satp = satp_mode_str(satp_max, is_32bit);
warn_report("Profile %s requires satp mode %s, "
"but satp mode %s was set", profile->name,
req_satp, cur_satp);
}
return false;
}
return true;
}
#endif
static void riscv_cpu_validate_profile(RISCVCPU *cpu,
RISCVCPUProfile *profile)
{
CPURISCVState *env = &cpu->env;
const char *warn_msg = "Profile %s mandates disabled extension %s";
bool send_warn = profile->user_set && profile->enabled;
bool parent_enabled, profile_impl = true;
int i;
#ifndef CONFIG_USER_ONLY
if (profile->satp_mode != RISCV_PROFILE_ATTR_UNUSED) {
profile_impl = riscv_cpu_validate_profile_satp(cpu, profile,
send_warn);
}
#endif
if (profile->priv_spec != RISCV_PROFILE_ATTR_UNUSED &&
profile->priv_spec != env->priv_ver) {
profile_impl = false;
if (send_warn) {
warn_report("Profile %s requires priv spec %s, "
"but priv ver %s was set", profile->name,
cpu_priv_ver_to_str(profile->priv_spec),
cpu_priv_ver_to_str(env->priv_ver));
}
}
for (i = 0; misa_bits[i] != 0; i++) {
uint32_t bit = misa_bits[i];
if (!(profile->misa_ext & bit)) {
continue;
}
if (!riscv_has_ext(&cpu->env, bit)) {
profile_impl = false;
if (send_warn) {
warn_report(warn_msg, profile->name,
riscv_get_misa_ext_name(bit));
}
}
}
for (i = 0; profile->ext_offsets[i] != RISCV_PROFILE_EXT_LIST_END; i++) {
int ext_offset = profile->ext_offsets[i];
if (!isa_ext_is_enabled(cpu, ext_offset)) {
profile_impl = false;
if (send_warn) {
warn_report(warn_msg, profile->name,
cpu_cfg_ext_get_name(ext_offset));
}
}
}
profile->enabled = profile_impl;
if (profile->parent != NULL) {
parent_enabled = object_property_get_bool(OBJECT(cpu),
profile->parent->name,
NULL);
profile->enabled = profile->enabled && parent_enabled;
}
}
static void riscv_cpu_validate_profiles(RISCVCPU *cpu)
{
for (int i = 0; riscv_profiles[i] != NULL; i++) {
riscv_cpu_validate_profile(cpu, riscv_profiles[i]);
}
}
static void riscv_cpu_init_implied_exts_rules(void)
{
RISCVCPUImpliedExtsRule *rule;
#ifndef CONFIG_USER_ONLY
MachineState *ms = MACHINE(qdev_get_machine());
#endif
static bool initialized;
int i;
/* Implied rules only need to be initialized once. */
if (initialized) {
return;
}
for (i = 0; (rule = riscv_misa_ext_implied_rules[i]); i++) {
#ifndef CONFIG_USER_ONLY
rule->enabled = bitmap_new(ms->smp.cpus);
#endif
g_hash_table_insert(misa_ext_implied_rules,
GUINT_TO_POINTER(rule->ext), (gpointer)rule);
}
for (i = 0; (rule = riscv_multi_ext_implied_rules[i]); i++) {
#ifndef CONFIG_USER_ONLY
rule->enabled = bitmap_new(ms->smp.cpus);
#endif
g_hash_table_insert(multi_ext_implied_rules,
GUINT_TO_POINTER(rule->ext), (gpointer)rule);
}
initialized = true;
}
static void cpu_enable_implied_rule(RISCVCPU *cpu,
RISCVCPUImpliedExtsRule *rule)
{
CPURISCVState *env = &cpu->env;
RISCVCPUImpliedExtsRule *ir;
bool enabled = false;
int i;
#ifndef CONFIG_USER_ONLY
enabled = test_bit(cpu->env.mhartid, rule->enabled);
#endif
if (!enabled) {
/* Enable the implied MISAs. */
if (rule->implied_misa_exts) {
riscv_cpu_set_misa_ext(env,
env->misa_ext | rule->implied_misa_exts);
for (i = 0; misa_bits[i] != 0; i++) {
if (rule->implied_misa_exts & misa_bits[i]) {
ir = g_hash_table_lookup(misa_ext_implied_rules,
GUINT_TO_POINTER(misa_bits[i]));
if (ir) {
cpu_enable_implied_rule(cpu, ir);
}
}
}
}
/* Enable the implied extensions. */
for (i = 0;
rule->implied_multi_exts[i] != RISCV_IMPLIED_EXTS_RULE_END; i++) {
cpu_cfg_ext_auto_update(cpu, rule->implied_multi_exts[i], true);
ir = g_hash_table_lookup(multi_ext_implied_rules,
GUINT_TO_POINTER(
rule->implied_multi_exts[i]));
if (ir) {
cpu_enable_implied_rule(cpu, ir);
}
}
#ifndef CONFIG_USER_ONLY
bitmap_set(rule->enabled, cpu->env.mhartid, 1);
#endif
}
}
/* Zc extension has special implied rules that need to be handled separately. */
static void cpu_enable_zc_implied_rules(RISCVCPU *cpu)
{
RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu);
CPURISCVState *env = &cpu->env;
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) && mcc->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) && mcc->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);
}
}
}
static void riscv_cpu_enable_implied_rules(RISCVCPU *cpu)
{
RISCVCPUImpliedExtsRule *rule;
int i;
/* Enable the implied extensions for Zc. */
cpu_enable_zc_implied_rules(cpu);
/* Enable the implied MISAs. */
for (i = 0; (rule = riscv_misa_ext_implied_rules[i]); i++) {
if (riscv_has_ext(&cpu->env, rule->ext)) {
cpu_enable_implied_rule(cpu, rule);
}
}
/* Enable the implied extensions. */
for (i = 0; (rule = riscv_multi_ext_implied_rules[i]); i++) {
if (isa_ext_is_enabled(cpu, rule->ext)) {
cpu_enable_implied_rule(cpu, rule);
}
}
}
void riscv_tcg_cpu_finalize_features(RISCVCPU *cpu, Error **errp)
{
CPURISCVState *env = &cpu->env;
Error *local_err = NULL;
riscv_cpu_init_implied_exts_rules();
riscv_cpu_enable_implied_rules(cpu);
riscv_cpu_validate_misa_priv(env, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
riscv_cpu_update_named_features(cpu);
riscv_cpu_validate_profiles(cpu);
if (cpu->cfg.ext_smepmp && !cpu->cfg.pmp) {
/*
* Enhanced PMP should only be available
* on harts with PMP support
*/
error_setg(errp, "Invalid configuration: Smepmp requires PMP support");
return;
}
riscv_cpu_validate_set_extensions(cpu, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
}
void riscv_tcg_cpu_finalize_dynamic_decoder(RISCVCPU *cpu)
{
GPtrArray *dynamic_decoders;
dynamic_decoders = g_ptr_array_sized_new(decoder_table_size);
for (size_t i = 0; i < decoder_table_size; ++i) {
if (decoder_table[i].guard_func &&
decoder_table[i].guard_func(&cpu->cfg)) {
g_ptr_array_add(dynamic_decoders,
(gpointer)decoder_table[i].riscv_cpu_decode_fn);
}
}
cpu->decoders = dynamic_decoders;
}
bool riscv_cpu_tcg_compatible(RISCVCPU *cpu)
{
return object_dynamic_cast(OBJECT(cpu), TYPE_RISCV_CPU_HOST) == NULL;
}
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 riscv_tcg_cpu_realize(CPUState *cs, Error **errp)
{
RISCVCPU *cpu = RISCV_CPU(cs);
if (!riscv_cpu_tcg_compatible(cpu)) {
g_autofree char *name = riscv_cpu_get_name(cpu);
error_setg(errp, "'%s' CPU is not compatible with TCG acceleration",
name);
return false;
}
#ifndef CONFIG_USER_ONLY
CPURISCVState *env = &cpu->env;
Error *local_err = NULL;
tcg_cflags_set(CPU(cs), CF_PCREL);
if (cpu->cfg.ext_sstc) {
riscv_timer_init(cpu);
}
if (cpu->cfg.pmu_mask) {
riscv_pmu_init(cpu, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return false;
}
if (cpu->cfg.ext_sscofpmf) {
cpu->pmu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
riscv_pmu_timer_cb, cpu);
}
}
/* With H-Ext, VSSIP, VSTIP, VSEIP and SGEIP are hardwired to one. */
if (riscv_has_ext(env, RVH)) {
env->mideleg = MIP_VSSIP | MIP_VSTIP | MIP_VSEIP | MIP_SGEIP;
}
#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 vendor_cpu = riscv_cpu_is_vendor(obj);
bool prev_val, value;
if (!visit_type_bool(v, name, &value, errp)) {
return;
}
cpu_misa_ext_add_user_opt(misa_bit, value);
prev_val = env->misa_ext & misa_bit;
if (value == prev_val) {
return;
}
if (value) {
if (vendor_cpu) {
g_autofree char *cpuname = riscv_cpu_get_name(cpu);
error_setg(errp, "'%s' CPU does not allow enabling extensions",
cpuname);
return;
}
if (misa_bit == RVH && env->priv_ver < PRIV_VERSION_1_12_0) {
/*
* Note: the 'priv_spec' command line option, if present,
* will take precedence over this priv_ver bump.
*/
env->priv_ver = PRIV_VERSION_1_12_0;
}
}
riscv_cpu_write_misa_bit(cpu, misa_bit, value);
}
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),
MISA_CFG(RVB, 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) {
riscv_cpu_write_misa_bit(RISCV_CPU(cpu_obj), bit,
misa_cfg->enabled);
}
}
}
static void cpu_set_profile(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
RISCVCPUProfile *profile = opaque;
RISCVCPU *cpu = RISCV_CPU(obj);
bool value;
int i, ext_offset;
if (riscv_cpu_is_vendor(obj)) {
error_setg(errp, "Profile %s is not available for vendor CPUs",
profile->name);
return;
}
if (cpu->env.misa_mxl != MXL_RV64) {
error_setg(errp, "Profile %s only available for 64 bit CPUs",
profile->name);
return;
}
if (!visit_type_bool(v, name, &value, errp)) {
return;
}
profile->user_set = true;
profile->enabled = value;
if (profile->parent != NULL) {
object_property_set_bool(obj, profile->parent->name,
profile->enabled, NULL);
}
if (profile->enabled) {
cpu->env.priv_ver = profile->priv_spec;
}
#ifndef CONFIG_USER_ONLY
if (profile->satp_mode != RISCV_PROFILE_ATTR_UNUSED) {
object_property_set_bool(obj, "mmu", true, NULL);
const char *satp_prop = satp_mode_str(profile->satp_mode,
riscv_cpu_is_32bit(cpu));
object_property_set_bool(obj, satp_prop, profile->enabled, NULL);
}
#endif
for (i = 0; misa_bits[i] != 0; i++) {
uint32_t bit = misa_bits[i];
if (!(profile->misa_ext & bit)) {
continue;
}
if (bit == RVI && !profile->enabled) {
/*
* Disabling profiles will not disable the base
* ISA RV64I.
*/
continue;
}
cpu_misa_ext_add_user_opt(bit, profile->enabled);
riscv_cpu_write_misa_bit(cpu, bit, profile->enabled);
}
for (i = 0; profile->ext_offsets[i] != RISCV_PROFILE_EXT_LIST_END; i++) {
ext_offset = profile->ext_offsets[i];
if (profile->enabled) {
if (cpu_cfg_offset_is_named_feat(ext_offset)) {
riscv_cpu_enable_named_feat(cpu, ext_offset);
}
cpu_bump_multi_ext_priv_ver(&cpu->env, ext_offset);
}
cpu_cfg_ext_add_user_opt(ext_offset, profile->enabled);
isa_ext_update_enabled(cpu, ext_offset, profile->enabled);
}
}
static void cpu_get_profile(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
RISCVCPUProfile *profile = opaque;
bool value = profile->enabled;
visit_type_bool(v, name, &value, errp);
}
static void riscv_cpu_add_profiles(Object *cpu_obj)
{
for (int i = 0; riscv_profiles[i] != NULL; i++) {
const RISCVCPUProfile *profile = riscv_profiles[i];
object_property_add(cpu_obj, profile->name, "bool",
cpu_get_profile, cpu_set_profile,
NULL, (void *)profile);
/*
* CPUs might enable a profile right from the start.
* Enable its mandatory extensions right away in this
* case.
*/
if (profile->enabled) {
object_property_set_bool(cpu_obj, profile->name, true, 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 vendor_cpu = riscv_cpu_is_vendor(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);
}
cpu_cfg_ext_add_user_opt(multi_ext_cfg->offset, value);
prev_val = isa_ext_is_enabled(cpu, multi_ext_cfg->offset);
if (value == prev_val) {
return;
}
if (value && vendor_cpu) {
g_autofree char *cpuname = riscv_cpu_get_name(cpu);
error_setg(errp, "'%s' CPU does not allow enabling extensions",
cpuname);
return;
}
if (value) {
cpu_bump_multi_ext_priv_ver(&cpu->env, multi_ext_cfg->offset);
}
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);
riscv_cpu_add_profiles(obj);
}
/*
* 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_ext(env, env->misa_ext | RVB | RVG | RVJ | RVV);
for (prop = riscv_cpu_extensions; prop && prop->name; prop++) {
isa_ext_update_enabled(cpu, prop->offset, true);
}
/*
* Some extensions can't be added without backward compatibilty concerns.
* Disable those, the user can still opt in to them on the command line.
*/
cpu->cfg.ext_svade = false;
/* 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 riscv_tcg_cpu_instance_init(CPUState *cs)
{
RISCVCPU *cpu = RISCV_CPU(cs);
Object *obj = OBJECT(cpu);
misa_ext_user_opts = g_hash_table_new(NULL, g_direct_equal);
multi_ext_user_opts = g_hash_table_new(NULL, g_direct_equal);
if (!misa_ext_implied_rules) {
misa_ext_implied_rules = g_hash_table_new(NULL, g_direct_equal);
}
if (!multi_ext_implied_rules) {
multi_ext_implied_rules = 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 riscv_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 riscv_tcg_cpu_class_init(CPUClass *cc)
{
cc->init_accel_cpu = riscv_tcg_cpu_init_ops;
}
static void riscv_tcg_cpu_accel_class_init(ObjectClass *oc, void *data)
{
AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
acc->cpu_class_init = riscv_tcg_cpu_class_init;
acc->cpu_instance_init = riscv_tcg_cpu_instance_init;
acc->cpu_target_realize = riscv_tcg_cpu_realize;
}
static const TypeInfo riscv_tcg_cpu_accel_type_info = {
.name = ACCEL_CPU_NAME("tcg"),
.parent = TYPE_ACCEL_CPU,
.class_init = riscv_tcg_cpu_accel_class_init,
.abstract = true,
};
static void riscv_tcg_cpu_accel_register_types(void)
{
type_register_static(&riscv_tcg_cpu_accel_type_info);
}
type_init(riscv_tcg_cpu_accel_register_types);