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hw/core: Use a callback for target specific query-cpus-fast information

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For being able to create a universal QEMU binary one day, core
files like machine-qmp-cmds.c must not contain any "#ifdef TARGET_..."
parts. Thus let's provide the target specific function via a
function pointer in CPUClass instead, as a first step towards
making this file target independent.

Message-Id: <20230424160434.331175-2-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2023-04-24 18:04:32 +02:00
parent c70bb9a771
commit 5503da4a0c
4 changed files with 15 additions and 14 deletions
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16
hw/core/machine-qmp-cmds.c
View File

@ -28,18 +28,6 @@
#include "sysemu/runstate.h"
#include "sysemu/sysemu.h"
static void cpustate_to_cpuinfo_s390(CpuInfoS390 *info, const CPUState *cpu)
{
#ifdef TARGET_S390X
S390CPU *s390_cpu = S390_CPU(cpu);
CPUS390XState *env = &s390_cpu->env;
info->cpu_state = env->cpu_state;
#else
abort();
#endif
}
/*
* fast means: we NEVER interrupt vCPU threads to retrieve
* information from KVM.
@ -68,8 +56,8 @@ CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
}
value->target = target;
if (target == SYS_EMU_TARGET_S390X) {
cpustate_to_cpuinfo_s390(&value->u.s390x, cpu);
if (cpu->cc->query_cpu_fast) {
cpu->cc->query_cpu_fast(cpu, value);
}
QAPI_LIST_APPEND(tail, value);

4
include/hw/core/cpu.h
View File

@ -106,6 +106,9 @@ struct SysemuCPUOps;
* @has_work: Callback for checking if there is work to do.
* @memory_rw_debug: Callback for GDB memory access.
* @dump_state: Callback for dumping state.
* @query_cpu_fast:
* Fill in target specific information for the "query-cpus-fast"
* QAPI call.
* @get_arch_id: Callback for getting architecture-dependent CPU ID.
* @set_pc: Callback for setting the Program Counter register. This
* should have the semantics used by the target architecture when
@ -151,6 +154,7 @@ struct CPUClass {
int (*memory_rw_debug)(CPUState *cpu, vaddr addr,
uint8_t *buf, int len, bool is_write);
void (*dump_state)(CPUState *cpu, FILE *, int flags);
void (*query_cpu_fast)(CPUState *cpu, CpuInfoFast *value);
int64_t (*get_arch_id)(CPUState *cpu);
void (*set_pc)(CPUState *cpu, vaddr value);
vaddr (*get_pc)(CPUState *cpu);

1
include/qemu/typedefs.h
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@ -41,6 +41,7 @@ typedef struct CompatProperty CompatProperty;
typedef struct ConfidentialGuestSupport ConfidentialGuestSupport;
typedef struct CPUAddressSpace CPUAddressSpace;
typedef struct CPUArchState CPUArchState;
typedef struct CpuInfoFast CpuInfoFast;
typedef struct CPUJumpCache CPUJumpCache;
typedef struct CPUState CPUState;
typedef struct CPUTLBEntryFull CPUTLBEntryFull;

8
target/s390x/cpu.c
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@ -140,6 +140,13 @@ static bool s390_cpu_has_work(CPUState *cs)
return s390_cpu_has_int(cpu);
}
static void s390_query_cpu_fast(CPUState *cpu, CpuInfoFast *value)
{
S390CPU *s390_cpu = S390_CPU(cpu);
value->u.s390x.cpu_state = s390_cpu->env.cpu_state;
}
/* S390CPUClass::reset() */
static void s390_cpu_reset(CPUState *s, cpu_reset_type type)
{
@ -332,6 +339,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
cc->class_by_name = s390_cpu_class_by_name,
cc->has_work = s390_cpu_has_work;
cc->dump_state = s390_cpu_dump_state;
cc->query_cpu_fast = s390_query_cpu_fast;
cc->set_pc = s390_cpu_set_pc;
cc->get_pc = s390_cpu_get_pc;
cc->gdb_read_register = s390_cpu_gdb_read_register;