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accel/tcg: Add block comment for probe_access

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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-4-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-05-08 08:43:43 -07:00 • committed by Peter Maydell
parent 9835936d44
commit 857129b341
1 changed files with 17 additions and 0 deletions
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17
include/exec/exec-all.h
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@ -330,6 +330,23 @@ static inline void tlb_flush_by_mmuidx_all_cpus_synced(CPUState *cpu,
{ {
} }
#endif #endif
/**
* probe_access:
* @env: CPUArchState
* @addr: guest virtual address to look up
* @size: size of the access
* @access_type: read, write or execute permission
* @mmu_idx: MMU index to use for lookup
* @retaddr: return address for unwinding
*
* Look up the guest virtual address @addr. Raise an exception if the
* page does not satisfy @access_type. Raise an exception if the
* access (@addr, @size) hits a watchpoint. For writes, mark a clean
* page as dirty.
*
* Finally, return the host address for a page that is backed by RAM,
* or NULL if the page requires I/O.
*/
void *probe_access(CPUArchState *env, target_ulong addr, int size, void *probe_access(CPUArchState *env, target_ulong addr, int size,
MMUAccessType access_type, int mmu_idx, uintptr_t retaddr); MMUAccessType access_type, int mmu_idx, uintptr_t retaddr);