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Re: [PATCH v3 15/19] target/riscv/tcg: introduce tcg_cpu_instance_init()
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From: |
Alistair Francis |
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Subject: |
Re: [PATCH v3 15/19] target/riscv/tcg: introduce tcg_cpu_instance_init() |
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Date: |
Mon, 25 Sep 2023 11:56:42 +1000 |
On Wed, Sep 20, 2023 at 9:23 PM Daniel Henrique Barboza
<dbarboza@ventanamicro.com> wrote:
>
> tcg_cpu_instance_init() will be the 'cpu_instance_init' impl for the TCG
> accelerator. It'll be called from within riscv_cpu_post_init(), via
> accel_cpu_instance_init(), similar to what happens with KVM. In fact, to
> preserve behavior, the implementation will be similar to what
> riscv_cpu_post_init() already does.
>
> In this patch we'll move riscv_cpu_add_user_properties() and
> riscv_init_max_cpu_extensions() and all their dependencies to tcg-cpu.c.
> All multi-extension properties code was moved. The 'multi_ext_user_opts'
> hash table was also moved to tcg-cpu.c since it's a TCG only structure,
> meaning that we won't have to worry about initializing a TCG hash table
> when running a KVM CPU anymore.
>
> riscv_cpu_add_user_properties() will remain in cpu.c for now due to how
> much code it requires to be moved at the same time. We'll do that in the
> next patch.
>
> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
> Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Alistair
> ---
> target/riscv/cpu.c | 150 -------------------------------------
> target/riscv/cpu.h | 1 -
> target/riscv/tcg/tcg-cpu.c | 149 ++++++++++++++++++++++++++++++++++++
> 3 files changed, 149 insertions(+), 151 deletions(-)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index cf191d576e..8616c9e2f5 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -162,9 +162,6 @@ static const struct isa_ext_data isa_edata_arr[] = {
> ISA_EXT_DATA_ENTRY(xventanacondops, PRIV_VERSION_1_12_0,
> ext_XVentanaCondOps),
> };
>
> -/* Hash that stores user set extensions */
> -static GHashTable *multi_ext_user_opts;
> -
> bool isa_ext_is_enabled(RISCVCPU *cpu, uint32_t ext_offset)
> {
> bool *ext_enabled = (void *)&cpu->cfg + ext_offset;
> @@ -194,12 +191,6 @@ int cpu_cfg_ext_get_min_version(uint32_t ext_offset)
> g_assert_not_reached();
> }
>
> -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));
> -}
> -
> const char * const riscv_int_regnames[] = {
> "x0/zero", "x1/ra", "x2/sp", "x3/gp", "x4/tp", "x5/t0", "x6/t1",
> "x7/t2", "x8/s0", "x9/s1", "x10/a0", "x11/a1", "x12/a2", "x13/a3",
> @@ -280,9 +271,6 @@ static const char * const riscv_intr_names[] = {
> "reserved"
> };
>
> -static void riscv_cpu_add_user_properties(Object *obj);
> -static void riscv_init_max_cpu_extensions(Object *obj);
> -
> const char *riscv_cpu_get_trap_name(target_ulong cause, bool async)
> {
> if (async) {
> @@ -1206,32 +1194,9 @@ static bool riscv_cpu_is_dynamic(Object *cpu_obj)
> return object_dynamic_cast(cpu_obj, TYPE_RISCV_DYNAMIC_CPU) != NULL;
> }
>
> -static bool riscv_cpu_has_max_extensions(Object *cpu_obj)
> -{
> - return object_dynamic_cast(cpu_obj, TYPE_RISCV_CPU_MAX) != NULL;
> -}
> -
> -static bool riscv_cpu_has_user_properties(Object *cpu_obj)
> -{
> - if (kvm_enabled() &&
> - object_dynamic_cast(cpu_obj, TYPE_RISCV_CPU_HOST) != NULL) {
> - return true;
> - }
> -
> - return riscv_cpu_is_dynamic(cpu_obj);
> -}
> -
> static void riscv_cpu_post_init(Object *obj)
> {
> accel_cpu_instance_init(CPU(obj));
> -
> - if (tcg_enabled() && riscv_cpu_has_user_properties(obj)) {
> - riscv_cpu_add_user_properties(obj);
> - }
> -
> - if (riscv_cpu_has_max_extensions(obj)) {
> - riscv_init_max_cpu_extensions(obj);
> - }
> }
>
> static void riscv_cpu_init(Object *obj)
> @@ -1244,8 +1209,6 @@ static void riscv_cpu_init(Object *obj)
> qdev_init_gpio_in(DEVICE(cpu), riscv_cpu_set_irq,
> IRQ_LOCAL_MAX + IRQ_LOCAL_GUEST_MAX);
> #endif /* CONFIG_USER_ONLY */
> -
> - multi_ext_user_opts = g_hash_table_new(NULL, g_direct_equal);
> }
>
> typedef struct RISCVCPUMisaExtConfig {
> @@ -1531,119 +1494,6 @@ Property riscv_cpu_options[] = {
> DEFINE_PROP_END_OF_LIST(),
> };
>
> -static void cpu_set_multi_ext_cfg(Object *obj, Visitor *v, const char *name,
> - void *opaque, Error **errp)
> -{
> - const RISCVCPUMultiExtConfig *multi_ext_cfg = opaque;
> - bool value;
> -
> - if (!visit_type_bool(v, name, &value, errp)) {
> - return;
> - }
> -
> - isa_ext_update_enabled(RISCV_CPU(obj), multi_ext_cfg->offset, value);
> -
> - g_hash_table_insert(multi_ext_user_opts,
> - GUINT_TO_POINTER(multi_ext_cfg->offset),
> - (gpointer)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)
> -{
> - object_property_add(cpu_obj, multi_cfg->name, "bool",
> - cpu_get_multi_ext_cfg,
> - cpu_set_multi_ext_cfg,
> - NULL, (void *)multi_cfg);
> -
> - /*
> - * 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);
> -
> - 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 Property riscv_cpu_properties[] = {
> DEFINE_PROP_BOOL("debug", RISCVCPU, cfg.debug, true),
>
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index 9ec0805596..01cbcbe119 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -710,7 +710,6 @@ enum riscv_pmu_event_idx {
>
> /* used by tcg/tcg-cpu.c*/
> void isa_ext_update_enabled(RISCVCPU *cpu, uint32_t ext_offset, bool en);
> -bool cpu_cfg_ext_is_user_set(uint32_t ext_offset);
> bool isa_ext_is_enabled(RISCVCPU *cpu, uint32_t ext_offset);
> int cpu_cfg_ext_get_min_version(uint32_t ext_offset);
> void riscv_cpu_set_misa(CPURISCVState *env, RISCVMXL mxl, uint32_t ext);
> diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
> index e480b9f726..5d71ff2cce 100644
> --- a/target/riscv/tcg/tcg-cpu.c
> +++ b/target/riscv/tcg/tcg-cpu.c
> @@ -24,6 +24,7 @@
> #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"
> @@ -31,6 +32,15 @@
> #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)
> {
> @@ -570,6 +580,144 @@ static bool tcg_cpu_realizefn(CPUState *cs, Error
> **errp)
> return true;
> }
>
> +static void cpu_set_multi_ext_cfg(Object *obj, Visitor *v, const char *name,
> + void *opaque, Error **errp)
> +{
> + const RISCVCPUMultiExtConfig *multi_ext_cfg = opaque;
> + bool value;
> +
> + if (!visit_type_bool(v, name, &value, errp)) {
> + return;
> + }
> +
> + isa_ext_update_enabled(RISCV_CPU(obj), multi_ext_cfg->offset, value);
> +
> + g_hash_table_insert(multi_ext_user_opts,
> + GUINT_TO_POINTER(multi_ext_cfg->offset),
> + (gpointer)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)
> +{
> + object_property_add(cpu_obj, multi_cfg->name, "bool",
> + cpu_get_multi_ext_cfg,
> + cpu_set_multi_ext_cfg,
> + NULL, (void *)multi_cfg);
> +
> + /*
> + * 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);
> +
> + 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 bool riscv_cpu_has_user_properties(Object *cpu_obj)
> +{
> + return object_dynamic_cast(cpu_obj, TYPE_RISCV_DYNAMIC_CPU) != NULL;
> +}
> +
> +static void tcg_cpu_instance_init(CPUState *cs)
> +{
> + RISCVCPU *cpu = RISCV_CPU(cs);
> + Object *obj = OBJECT(cpu);
> +
> + if (riscv_cpu_has_user_properties(obj)) {
> + 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)
> {
> /*
> @@ -588,6 +736,7 @@ 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_realizefn = tcg_cpu_realizefn;
> }
>
> --
> 2.41.0
>
>
- Re: [PATCH v3 10/19] target/riscv: remove kvm-stub.c, (continued)
- [PATCH v3 11/19] target/riscv: introduce KVM AccelCPUClass, Daniel Henrique Barboza, 2023/09/20
- [PATCH v3 12/19] target/riscv: move KVM only files to kvm subdir, Daniel Henrique Barboza, 2023/09/20
- [PATCH v3 13/19] target/riscv/kvm: do not use riscv_cpu_add_misa_properties(), Daniel Henrique Barboza, 2023/09/20
- [PATCH v3 14/19] target/riscv/cpu.c: export set_misa(), Daniel Henrique Barboza, 2023/09/20
- [PATCH v3 15/19] target/riscv/tcg: introduce tcg_cpu_instance_init(), Daniel Henrique Barboza, 2023/09/20
- Re: [PATCH v3 15/19] target/riscv/tcg: introduce tcg_cpu_instance_init(),
Alistair Francis <=
- [PATCH v3 16/19] target/riscv/cpu.c: make misa_ext_cfgs[] 'const', Daniel Henrique Barboza, 2023/09/20
- [PATCH v3 17/19] target/riscv/tcg: move riscv_cpu_add_misa_properties() to tcg-cpu.c, Daniel Henrique Barboza, 2023/09/20
- [PATCH v3 18/19] target/riscv/cpu.c: export isa_edata_arr[], Daniel Henrique Barboza, 2023/09/20
- [PATCH v3 19/19] target/riscv/cpu: move priv spec functions to tcg-cpu.c, Daniel Henrique Barboza, 2023/09/20
- Re: [PATCH v3 00/19] riscv: split TCG/KVM accelerators from cpu.c, Alistair Francis, 2023/09/24