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accel/tcg: Add block comment for probe_access
Backports commit 857129b34190a4c2e782006dc255352a6cd3934b from qemu
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@ -212,7 +212,23 @@ static inline void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr)
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{
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}
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#endif
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/**
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* probe_access:
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* @env: CPUArchState
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* @addr: guest virtual address to look up
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* @size: size of the access
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* @access_type: read, write or execute permission
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* @mmu_idx: MMU index to use for lookup
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* @retaddr: return address for unwinding
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*
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* Look up the guest virtual address @addr. Raise an exception if the
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* page does not satisfy @access_type. Raise an exception if the
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* access (@addr, @size) hits a watchpoint. For writes, mark a clean
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* page as dirty.
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*
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* Finally, return the host address for a page that is backed by RAM,
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* or NULL if the page requires I/O.
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*/
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void *probe_access(CPUArchState *env, target_ulong addr, int size,
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MMUAccessType access_type, int mmu_idx, uintptr_t retaddr);
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