Ah, yes of course the virtual address. Thanks for pointing it out! Chan Kim From: Deepanshu Kartikey <kartikey406@xxxxxxxxx>
Sent: Monday, July 12, 2021 1:48 AM
To: ckim@xxxxxxxxxx
Cc: kernelnewbies@xxxxxxxxxxxxxxxxx
Subject: Re: ioremap and page table What my understanding is that ioremap converts your address to a virtual address. So, yes everything then is handled by the kernel Hello all, I’m almost sure but want to check if my understanding is correct. To use a memory mapped IO, we use functions like request_mem_region and ioremap, iounmap functions. I guess when we call ioremap function, the kernel sets up page table for the region so that the region becomes non-cacheable, and I don’t also have to worry about reordering problem. Is my understanding correct? Thanks! Chan Kim _______________________________________________
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