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exec: introduce cpu_reload_memory_map 

This for now is a simple TLB flush.  This can change later for two
reasons:

1) an AddressSpaceDispatch will be cached in the CPUState object

2) it will not be possible to do tlb_flush once the TCG-generated code
runs outside the BQL.

Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-01-15 12:46:47 +01:00
parent 8b5c216025
commit 76e5c76f2e
3 changed files with 8 additions and 1 deletions
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6
cpu-exec.c
View File

@ -141,6 +141,12 @@ void cpu_resume_from_signal(CPUState *cpu, void *puc)
cpu->exception_index = -1; cpu->exception_index = -1;
siglongjmp(cpu->jmp_env, 1); siglongjmp(cpu->jmp_env, 1);
} }
void cpu_reload_memory_map(CPUState *cpu)
{
/* The TLB is protected by the iothread lock. */
tlb_flush(cpu, 1);
}
#endif #endif
/* Execute a TB, and fix up the CPU state afterwards if necessary */ /* Execute a TB, and fix up the CPU state afterwards if necessary */

2
exec.c
View File

@ -2026,7 +2026,7 @@ static void tcg_commit(MemoryListener *listener)
if (cpu->tcg_as_listener != listener) { if (cpu->tcg_as_listener != listener) {
continue; continue;
} }
tlb_flush(cpu, 1); cpu_reload_memory_map(cpu);
} }
} }

1
include/exec/exec-all.h
View File

@ -96,6 +96,7 @@ void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
void tb_invalidate_phys_range(tb_page_addr_t start, tb_page_addr_t end, void tb_invalidate_phys_range(tb_page_addr_t start, tb_page_addr_t end,
int is_cpu_write_access); int is_cpu_write_access);
#if !defined(CONFIG_USER_ONLY) #if !defined(CONFIG_USER_ONLY)
void cpu_reload_memory_map(CPUState *cpu);
void tcg_cpu_address_space_init(CPUState *cpu, AddressSpace *as); void tcg_cpu_address_space_init(CPUState *cpu, AddressSpace *as);
/* cputlb.c */ /* cputlb.c */
void tlb_flush_page(CPUState *cpu, target_ulong addr); void tlb_flush_page(CPUState *cpu, target_ulong addr);