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cpu: add APIs to allocate/free CPU environment

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These will be implemented and then used by follow-up patches.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2017-06-23 22:25:03 +03:00
parent a41c78c135
commit e2a7f28693
2 changed files with 65 additions and 0 deletions
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31
include/qom/cpu.h
View File

@ -162,6 +162,10 @@ typedef struct CPUClass {
void (*dump_statistics)(CPUState *cpu, FILE *f,
fprintf_function cpu_fprintf, int flags);
int64_t (*get_arch_id)(CPUState *cpu);
void * (*alloc_env)(CPUState *cpu);
void (*get_env)(CPUState *cpu, void *env);
void (*set_env)(CPUState *cpu, void *env);
void (*free_env)(CPUState *cpu, void *env);
bool (*get_paging_enabled)(const CPUState *cpu);
void (*get_memory_mapping)(CPUState *cpu, MemoryMappingList *list,
Error **errp);
@ -439,6 +443,33 @@ static inline void cpu_tb_jmp_cache_clear(CPUState *cpu)
extern bool mttcg_enabled;
#define qemu_tcg_mttcg_enabled() (mttcg_enabled)
/**
* cpu_alloc_env: allocate CPU environment structure
* @cpu: allocate environment structure for this CPU
*/
void *cpu_alloc_env(CPUState *cpu);
/**
* cpu_get_env: retrieve CPU environment structure
* @cpu: CPU to use
* @env: environment structure to use
*/
void cpu_get_env(CPUState *cpu, void *env);
/**
* cpu_set_env: switch to given CPU environment
* @cpu: CPU to use
* @env: environment structure to use
*/
void cpu_set_env(CPUState *cpu, void *env);
/**
* cpu_free_env: free CPU environment structure
* @cpu: free environment structure for this CPU
* @env: structure to free
*/
void cpu_free_env(CPUState *cpu, void *env);
/**
* cpu_paging_enabled:
* @cpu: The CPU whose state is to be inspected.

34
qom/cpu.c
View File

@ -89,6 +89,40 @@ out:
return cpu;
}
void *cpu_alloc_env(CPUState *cpu)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
return cc->alloc_env ? cc->alloc_env(cpu) : NULL;
}
void cpu_get_env(CPUState *cpu, void *env)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
if (cc->get_env) {
cc->get_env(cpu, env);
}
}
void cpu_set_env(CPUState *cpu, void *env)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
if (cc->set_env) {
cc->set_env(cpu, env);
}
}
void cpu_free_env(CPUState *cpu, void *env)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
if (cc->free_env) {
cc->free_env(cpu, env);
}
}
bool cpu_paging_enabled(const CPUState *cpu)
{
CPUClass *cc = CPU_GET_CLASS(cpu);