PCI resources above 4GB

[Steven Newbury]

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On 12/04/12 17:40, Steven Newbury wrote:
> On Thu, 12 Apr 2012, 17:07:33 BST, Yinghai Lu <yinghai at kernel.org>
> wrote:
> 
>> On Thu, Apr 12, 2012 at 4:22 AM, Steven Newbury
>> <steve at snewbury.org.uk> wrote:
>>> Thanks, that fixed it! :) I had a similar patch I've been
>>> working on but I had my fix in the wrong place!
>>> 
>>> In the working case, initially the BIOS has set GMA to within
>>> the low system DRAM 0xC0000000 obviously invalid.  This
>>> conflict is detected and it's relallocated to 0x12000000.
>>> 
>>> I've attempted to modify probe.c to disable 64-bit BARs not
>>> allocated above 4G so they get reallocated above when possible
>>> later.  It seemed to work, but again broke GMA despite the BAR
>>> originally containing an invalid address as mentioned above, it
>>> seems for some reason something is different when the conflict
>>> is detected and rellocated, compared to disabling it early then
>>> allocating a valid value..?
>>> 
I've created a new quirk utilising an extra PCI resource flag to force
reallocation of the resource.  It's the first approach I've had any
success at.  It does work.  Only "Intel Page Flush" now gets allocated
@0xe0000000!


00000000-0000ffff : reserved
00010000-0009efff : System RAM
0009f000-0009ffff : reserved
000c0000-000c7fff : Video ROM
000cf000-000cffff : Adapter ROM
000f0000-000fffff : System ROM
00100000-df65a7ff : System RAM
  01000000-0136defd : Kernel code
  0136defe-0169127f : Kernel data
  0172f000-01809fff : Kernel bss
df65a800-dfffffff : reserved
  df65a800-df6fffff : pnp 00:0d
  df700000-df7fffff : pnp 00:0d
e0000000-e0000fff : Intel Flush Page
f0000000-f01fffff : PCI Bus 0000:0d
f6900000-f69fffff : PCI Bus 0000:09
  f69f0000-f69fffff : 0000:09:00.0
    f69f0000-f69fffff : tg3
f6a00000-f6bfffff : PCI Bus 0000:0d
f6c00000-f6cfffff : PCI Bus 0000:0c
  f6cfe000-f6cfffff : 0000:0c:00.0
    f6cfe000-f6cfffff : iwl4965
f6dfb700-f6dfb7ff : 0000:00:1f.3
f6dfb800-f6dfbfff : 0000:00:1f.2
  f6dfb800-f6dfbfff : ahci
f6dfc000-f6dfffff : 0000:00:1b.0
  f6dfc000-f6dfffff : ICH HD audio
f6e00000-f6efffff : 0000:00:02.0
f6f00000-f6ffffff : 0000:00:02.1
f8000000-fbffffff : PCI MMCONFIG 0000 [bus 00-3f]
  f8000000-fbffffff : reserved
    f8000000-fbffffff : pnp 00:0d
fec00000-fec0ffff : reserved
  fec00000-fec003ff : IOAPIC 0
fed00000-fed003ff : HPET 0
  fed00000-fed003ff : pnp 00:08
fed18000-fed1bfff : reserved
  fed18000-fed1bfff : pnp 00:0d
fed1c000-fed1c3ff : 0000:00:1d.7
  fed1c000-fed1c3ff : ehci_hcd
fed1c400-fed1c7ff : 0000:00:1a.7
  fed1c400-fed1c7ff : ehci_hcd
fed20000-fed8ffff : reserved
  fed20000-fed3ffff : pnp 00:0d
  fed40000-fed44fff : pnp 00:0a
  fed45000-fed8ffff : pnp 00:0d
feda0000-feda5fff : reserved
  feda0000-feda3fff : pnp 00:0d
  feda4000-feda4fff : pnp 00:0d
  feda5000-feda5fff : pnp 00:0d
feda6000-feda6fff : pnp 00:0d
fee00000-fee0ffff : reserved
  fee00000-fee0ffff : pnp 00:0d
    fee00000-fee00fff : Local APIC
ffa00000-ffbfffff : pnp 00:0d
ffc00000-ffdfffff : PCI Bus 0000:0b
ffe00000-ffffffff : reserved
  ffe00000-ffffffff : pnp 00:0d
100000000-11fffffff : System RAM
fefa00000-fefbfffff : PCI Bus 0000:09
fefc00000-fefdfffff : PCI Bus 0000:0c
fefe00000-fefffffff : PCI Bus 0000:0b
ff0000000-fffffffff : 0000:00:02.0

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