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Re: Fill tlb for data and io address

From: Peter Maydell
Subject: Re: Fill tlb for data and io address
Date: Tue, 16 Feb 2021 11:48:10 +0000

On Tue, 16 Feb 2021 at 11:28, 沈梦姣 <shen.mengjiao3@icloud.com> wrote:
> Look at the store/load helper, it will use the tlb entry to do the address 
> translation(from guest virtual address to host virtual address) but where the 
> tlb is filled for the data ram and io address, I know where the code ram is 
> filled(tb_find->tb_lookup__cpu_state...)

The common QEMU code calls the target CPU tlb_fill function, which tries
to translate the guest virtual address to a physical address (usually by
walking the guest page tables). If it succeeds then will update the QEMU
TLB by calling either tlb_set_page() or tlb_set_page_with_attrs(). If it
fails then it arranges to deliver a suitable exception to the guest.

-- PMM

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