[vbox-dev] ICH9 BAR5 access
klaus.espenlaub at oracle.com
Tue Aug 18 18:25:17 UTC 2015
On 18.08.2015 20:04, Ananth Pallapothu wrote:
> Hello Experts,
> I have added new pass through device to the VirtualBox setup .
> Registered all 6 BAR's with appropriate sizes, none exceeding 256M.
> All BAR's were set to reflect hardware functionality (assigned 0),
> eventually OS programmed base address regions with the sizes I have
> registered them with.
Can you provide more details (how you map the regions initially and on
remap)? Hard to say what's happening otherwise.
> My fundamental problem is, I have been able to access BAR0 and NOT
> BAR5. I tried playing with BIOSmmio address setting in DevPciIch9,
> that made difference in relocating BAR's but functionality remained
> the same (Not able to access BAR5)
> Interesting part is, PIIX3 chipset is fully functional ie., can access
> BAR5 in PIIX3 but NOT in ICH9.
Could be that with PIIX3 there's no remap and with ICH9 there's a
remap... really difficult to say anything with the sparse information.
> PS: There seems to be some problem with my email ID, so not sure
> whether my last email came through. Sorry if you have already received
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