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| author | Paolo Bonzini | 2013-08-16 08:26:30 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2015-02-16 17:30:19 +0100 |
| commit | 9d82b5a792236db31a75b9db5c93af69ac07c7c5 (patch) | |
| tree | 95682ab6099e8e318102678fcba9cd2b62b9568c /include/exec | |
| parent | exec: introduce cpu_reload_memory_map (diff) | |
| download | qemu-9d82b5a792236db31a75b9db5c93af69ac07c7c5.tar.gz qemu-9d82b5a792236db31a75b9db5c93af69ac07c7c5.tar.xz qemu-9d82b5a792236db31a75b9db5c93af69ac07c7c5.zip | |
exec: make iotlb RCU-friendly
After the previous patch, TLBs will be flushed on every change to
the memory mapping. This patch augments that with synchronization
of the MemoryRegionSections referred to in the iotlb array.
With this change, it is guaranteed that iotlb_to_region will access
the correct memory map, even once the TLB will be accessed outside
the BQL.
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/cputlb.h | 2 | ||||
| -rw-r--r-- | include/exec/exec-all.h | 3 |
2 files changed, 3 insertions, 2 deletions
diff --git a/include/exec/cputlb.h b/include/exec/cputlb.h index b8ecd6f68d..e0da9d7ad3 100644 --- a/include/exec/cputlb.h +++ b/include/exec/cputlb.h @@ -34,7 +34,7 @@ extern int tlb_flush_count; void tb_flush_jmp_cache(CPUState *cpu, target_ulong addr); MemoryRegionSection * -address_space_translate_for_iotlb(AddressSpace *as, hwaddr addr, hwaddr *xlat, +address_space_translate_for_iotlb(CPUState *cpu, hwaddr addr, hwaddr *xlat, hwaddr *plen); hwaddr memory_region_section_get_iotlb(CPUState *cpu, MemoryRegionSection *section, diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 1b30813449..bb3fd37dc6 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -338,7 +338,8 @@ extern uintptr_t tci_tb_ptr; void phys_mem_set_alloc(void *(*alloc)(size_t, uint64_t *align)); -struct MemoryRegion *iotlb_to_region(AddressSpace *as, hwaddr index); +struct MemoryRegion *iotlb_to_region(CPUState *cpu, + hwaddr index); bool io_mem_read(struct MemoryRegion *mr, hwaddr addr, uint64_t *pvalue, unsigned size); bool io_mem_write(struct MemoryRegion *mr, hwaddr addr, |