diff options
| -rw-r--r-- | docs/devel/reset.rst | 10 | ||||
| -rw-r--r-- | include/hw/resettable.h | 2 | ||||
| -rw-r--r-- | target/s390x/cpu.c | 38 | ||||
| -rw-r--r-- | target/s390x/cpu.h | 21 | ||||
| -rw-r--r-- | target/s390x/sigp.c | 8 |
5 files changed, 35 insertions, 44 deletions
diff --git a/docs/devel/reset.rst b/docs/devel/reset.rst index 9746a4e8a0..ed41e09f16 100644 --- a/docs/devel/reset.rst +++ b/docs/devel/reset.rst @@ -44,6 +44,16 @@ The Resettable interface handles reset types with an enum ``ResetType``: value on each cold reset, such as RNG seed information, and which they must not reinitialize on a snapshot-load reset. +``RESET_TYPE_S390_CPU_NORMAL`` + This is only used for S390 CPU objects; it clears interrupts, stops + processing, and clears the TLB, but does not touch register contents. + +``RESET_TYPE_S390_CPU_INITIAL`` + This is only used for S390 CPU objects; it does everything + ``RESET_TYPE_S390_CPU_NORMAL`` does and also clears the PSW, prefix, + FPC, timer and control registers. It does not touch gprs, fprs or acrs. + + Devices which implement reset methods must treat any unknown ``ResetType`` as equivalent to ``RESET_TYPE_COLD``; this will reduce the amount of existing code we need to change if we add more types in future. diff --git a/include/hw/resettable.h b/include/hw/resettable.h index 7e249deb8b..83b561fc83 100644 --- a/include/hw/resettable.h +++ b/include/hw/resettable.h @@ -36,6 +36,8 @@ typedef struct ResettableState ResettableState; typedef enum ResetType { RESET_TYPE_COLD, RESET_TYPE_SNAPSHOT_LOAD, + RESET_TYPE_S390_CPU_INITIAL, + RESET_TYPE_S390_CPU_NORMAL, } ResetType; /* diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c index 0fbfcd35d8..4e41a3dff5 100644 --- a/target/s390x/cpu.c +++ b/target/s390x/cpu.c @@ -32,6 +32,7 @@ #include "sysemu/hw_accel.h" #include "hw/qdev-properties.h" #include "hw/qdev-properties-system.h" +#include "hw/resettable.h" #include "fpu/softfloat-helpers.h" #include "disas/capstone.h" #include "sysemu/tcg.h" @@ -162,23 +163,25 @@ static void s390_query_cpu_fast(CPUState *cpu, CpuInfoFast *value) #endif } -/* S390CPUClass::reset() */ -static void s390_cpu_reset(CPUState *s, cpu_reset_type type) +/* S390CPUClass Resettable reset_hold phase method */ +static void s390_cpu_reset_hold(Object *obj, ResetType type) { - S390CPU *cpu = S390_CPU(s); + S390CPU *cpu = S390_CPU(obj); S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); CPUS390XState *env = &cpu->env; - DeviceState *dev = DEVICE(s); - scc->parent_reset(dev); + if (scc->parent_phases.hold) { + scc->parent_phases.hold(obj, type); + } cpu->env.sigp_order = 0; s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu); switch (type) { - case S390_CPU_RESET_CLEAR: + default: + /* RESET_TYPE_COLD: power on or "clear" reset */ memset(env, 0, offsetof(CPUS390XState, start_initial_reset_fields)); /* fall through */ - case S390_CPU_RESET_INITIAL: + case RESET_TYPE_S390_CPU_INITIAL: /* initial reset does not clear everything! */ memset(&env->start_initial_reset_fields, 0, offsetof(CPUS390XState, start_normal_reset_fields) - @@ -203,7 +206,7 @@ static void s390_cpu_reset(CPUState *s, cpu_reset_type type) set_float_detect_tininess(float_tininess_before_rounding, &env->fpu_status); /* fall through */ - case S390_CPU_RESET_NORMAL: + case RESET_TYPE_S390_CPU_NORMAL: env->psw.mask &= ~PSW_MASK_RI; memset(&env->start_normal_reset_fields, 0, offsetof(CPUS390XState, end_reset_fields) - @@ -212,20 +215,18 @@ static void s390_cpu_reset(CPUState *s, cpu_reset_type type) env->pfault_token = -1UL; env->bpbc = false; break; - default: - g_assert_not_reached(); } /* Reset state inside the kernel that we cannot access yet from QEMU. */ if (kvm_enabled()) { switch (type) { - case S390_CPU_RESET_CLEAR: + default: kvm_s390_reset_vcpu_clear(cpu); break; - case S390_CPU_RESET_INITIAL: + case RESET_TYPE_S390_CPU_INITIAL: kvm_s390_reset_vcpu_initial(cpu); break; - case S390_CPU_RESET_NORMAL: + case RESET_TYPE_S390_CPU_NORMAL: kvm_s390_reset_vcpu_normal(cpu); break; } @@ -315,12 +316,6 @@ static Property s390x_cpu_properties[] = { DEFINE_PROP_END_OF_LIST() }; -static void s390_cpu_reset_full(DeviceState *dev) -{ - CPUState *s = CPU(dev); - return s390_cpu_reset(s, S390_CPU_RESET_CLEAR); -} - #ifdef CONFIG_TCG #include "hw/core/tcg-cpu-ops.h" @@ -383,15 +378,16 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data) S390CPUClass *scc = S390_CPU_CLASS(oc); CPUClass *cc = CPU_CLASS(scc); DeviceClass *dc = DEVICE_CLASS(oc); + ResettableClass *rc = RESETTABLE_CLASS(oc); device_class_set_parent_realize(dc, s390_cpu_realizefn, &scc->parent_realize); device_class_set_props(dc, s390x_cpu_properties); dc->user_creatable = true; - device_class_set_parent_reset(dc, s390_cpu_reset_full, &scc->parent_reset); + resettable_class_set_parent_phases(rc, NULL, s390_cpu_reset_hold, NULL, + &scc->parent_phases); - scc->reset = s390_cpu_reset; cc->class_by_name = s390_cpu_class_by_name, cc->has_work = s390_cpu_has_work; cc->mmu_index = s390x_cpu_mmu_index; diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 6cbd77dfdf..5ef61b1f75 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -177,19 +177,11 @@ struct ArchCPU { uint32_t irqstate_saved_size; }; -typedef enum cpu_reset_type { - S390_CPU_RESET_NORMAL, - S390_CPU_RESET_INITIAL, - S390_CPU_RESET_CLEAR, -} cpu_reset_type; - /** * S390CPUClass: * @parent_realize: The parent class' realize handler. - * @parent_reset: The parent class' reset handler. + * @parent_phases: The parent class' reset phase handlers. * @load_normal: Performs a load normal. - * @cpu_reset: Performs a CPU reset. - * @initial_cpu_reset: Performs an initial CPU reset. * * An S/390 CPU model. */ @@ -203,9 +195,8 @@ struct S390CPUClass { const char *desc; DeviceRealize parent_realize; - DeviceReset parent_reset; + ResettablePhases parent_phases; void (*load_normal)(CPUState *cpu); - void (*reset)(CPUState *cpu, cpu_reset_type type); }; #ifndef CONFIG_USER_ONLY @@ -872,16 +863,12 @@ static inline void s390_do_cpu_full_reset(CPUState *cs, run_on_cpu_data arg) static inline void s390_do_cpu_reset(CPUState *cs, run_on_cpu_data arg) { - S390CPUClass *scc = S390_CPU_GET_CLASS(cs); - - scc->reset(cs, S390_CPU_RESET_NORMAL); + resettable_reset(OBJECT(cs), RESET_TYPE_S390_CPU_NORMAL); } static inline void s390_do_cpu_initial_reset(CPUState *cs, run_on_cpu_data arg) { - S390CPUClass *scc = S390_CPU_GET_CLASS(cs); - - scc->reset(cs, S390_CPU_RESET_INITIAL); + resettable_reset(OBJECT(cs), RESET_TYPE_S390_CPU_INITIAL); } static inline void s390_do_cpu_load_normal(CPUState *cs, run_on_cpu_data arg) diff --git a/target/s390x/sigp.c b/target/s390x/sigp.c index ad0ad61177..08aaecf12b 100644 --- a/target/s390x/sigp.c +++ b/target/s390x/sigp.c @@ -251,24 +251,20 @@ static void sigp_restart(CPUState *cs, run_on_cpu_data arg) static void sigp_initial_cpu_reset(CPUState *cs, run_on_cpu_data arg) { - S390CPU *cpu = S390_CPU(cs); - S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); SigpInfo *si = arg.host_ptr; cpu_synchronize_state(cs); - scc->reset(cs, S390_CPU_RESET_INITIAL); + resettable_reset(OBJECT(cs), RESET_TYPE_S390_CPU_INITIAL); cpu_synchronize_post_reset(cs); si->cc = SIGP_CC_ORDER_CODE_ACCEPTED; } static void sigp_cpu_reset(CPUState *cs, run_on_cpu_data arg) { - S390CPU *cpu = S390_CPU(cs); - S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); SigpInfo *si = arg.host_ptr; cpu_synchronize_state(cs); - scc->reset(cs, S390_CPU_RESET_NORMAL); + resettable_reset(OBJECT(cs), RESET_TYPE_S390_CPU_NORMAL); cpu_synchronize_post_reset(cs); si->cc = SIGP_CC_ORDER_CODE_ACCEPTED; } |