Re: Query on directly accessing physical memory from a kernel module

[Arn <cse.syslab@xxxxxxxxx>]

>> ok yes, that makes sense.

>> Now suppose I want to access the second byte/word from each page frame (physical) in the system (or a random set of  

>> page frames), would I need to do something similar ?
>>
>> On the same topic, how can a page frame (struct page) be resolved to its physical address ?

> The process I just described is to access any physical address (Any byte / word). The concept of page frames etc are at a higher level.

 

> To convert to physical address from page frame no, I recall there would be a macro in some header (some thing like __pfn_to_pa or something like that ... I don't recall exactly)

 

Ok great, I'll look into this, try it and post again if need be.

Thanks again for your help.
ARN