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accel/tcg: Add TCGCPUOps.pointer_wrap

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Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2025-05-03 13:17:17 -07:00
parent eb978e50e4
commit bdf26b5d16
2 changed files with 13 additions and 0 deletions
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6
accel/tcg/cputlb.c
View file

@ -1773,6 +1773,12 @@ static bool mmu_lookup(CPUState *cpu, vaddr addr, MemOpIdx oi,
l->page[1].size = l->page[0].size - size0;
l->page[0].size = size0;
if (cpu->cc->tcg_ops->pointer_wrap) {
l->page[1].addr = cpu->cc->tcg_ops->pointer_wrap(cpu, l->mmu_idx,
l->page[1].addr,
addr);
}
/*
* Lookup both pages, recognizing exceptions from either. If the
* second lookup potentially resized, refresh first CPUTLBEntryFull.

7
include/accel/tcg/cpu-ops.h
View file

@ -222,6 +222,13 @@ struct TCGCPUOps {
bool (*tlb_fill)(CPUState *cpu, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
/**
* @pointer_wrap:
*
* We have incremented @base to @result, resulting in a page change.
* For the current cpu state, adjust @result for possible overflow.
*/
vaddr (*pointer_wrap)(CPUState *cpu, int mmu_idx, vaddr result, vaddr base);
/**
* @do_transaction_failed: Callback for handling failed memory transactions
* (ie bus faults or external aborts; not MMU faults)