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Old 04-01-2014, 04:14 PM   #1
rcjeppsen
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Does Linux limit the address decode size of a PCIe device's MMIO BAR?


I'm researching to see if Linux limits the size of an MMIO BAR for any given PCIe device. I looked through the probe.c code and it doesn't seem that there is a limit. It appears that Linux will assign a decode region for 64-bit addresses however much it needs until it runs out of PCIe allocated address space. Will it allow me to open an aperture of 256GB for a single BAR?

I would appreciate any answers and references to code.
 
Old 04-03-2014, 09:37 AM   #2
jeremy
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Please post your thread in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. This thread is being closed because it is a duplicate.
 
  


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