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From: Andy Isaacson on 7 Apr 2010 20:20
On Wed, Apr 07, 2010 at 04:43:44PM -0700, H. Peter Anvin wrote:
> > or you can add
> > boot_params.screen_info.orig_video_isVGA == 1
> > or double check scan pci tree to see if video is there or not
>
> Perhaps boot_params.screen_info.orig_video_isVGA != 1 because he's not
> booting in a text mode?

It's a pretty standard grub2 install (Debian unstable,
1.98~20100128-1.2) with something approaching the default config. Grub
does seem to put the console in some annoying framebuffer format to draw
the boot menu, but IIRC it switches back to VGA textmode before booting
the kernel.

-andy
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From: Bjorn Helgaas on 7 Apr 2010 23:30
On Wed, 2010-04-07 at 16:22 -0700, Yinghai wrote:
> On 04/07/2010 04:05 PM, Bjorn Helgaas wrote:
> > On Wednesday 07 April 2010 04:45:30 pm Yinghai wrote:
> >> On 04/07/2010 02:06 PM, Bjorn Helgaas wrote:
> >>>
> >>> Currently, we only reserve the legacy VGA area [mem 0xa0000-0xbffff] on
> >>> x86_32. But this legacy area is also used on x86_64, so this patch
> >>> reserves it there, too.
> >>>
> >>> If we don't reserve it, we may mistakenly move a PCI device to that area,
> >>> as we did here:
> >>>
> >>> pci_root PNP0A03:00: host bridge window [mem 0xff980800-0xff980bff]
> >>> pci_root PNP0A03:00: host bridge window [mem 0xff97c000-0xff97ffff]
> >>> pci 0000:00:1f.2: no compatible bridge window for [mem 0xff970000-0xff9707ff]
> >>> pci 0000:00:1f.2: BAR 5: assigned [mem 0x000a0000-0x000a07ff]
> >>>
> >>> as reported by Andy Isaacson at http://lkml.org/lkml/2010/4/6/375
> >>>
> >>> I think the fact that the BAR is not within a host bridge window is a
> >>> BIOS defect, and it's now more visible because we have "pci=use_crs" as
> >>> the default. Using "pci=nocrs" is a workaround, because then we won't
> >>> attempt to move the device.
> >>
> >> that doesn't look right.
> >>
> >> It seem another thread, erission has one model without VGA, and they use that area for other device MMIO.
> >>
> >> current for 64bit, We remove [0xa0000, 0x100000) from e820 map if those area is E820_RAM.
> >>
> >> in e820_reserve_resources(), kernel will reserve range < 1M according to e820 map.
> >> that is before pci BAR is claimed.
> >>
> >> or you can add
> >> boot_params.screen_info.orig_video_isVGA == 1
> >> or double check scan pci tree to see if video is there or not
> >
> > I'm sorry, I can't understand what you're saying.
>
> for 64 bit, you may check boot_params.screen_info.orig_video_isVGA to see if you need to reserve that VGA range.
> not sure if every bootloader fill that...

If you're saying that on x86_64, you have a reliable way to determine
whether to reserve the legacy VGA MMIO area, I hope you'll provide a
patch, because I don't know about this sort of x86_32 vs x86_64
difference.

I actually did propose doing something in pci_setup_device(), similar to
what we already do for legacy IDE resources, but HPA thought it should
be done in the arch code instead, again for reasons I don't completely
understand.

> when the system only have one peer root bus, can you skip the _CRS for it?

That's ugly. When we discover the first host bridge, we have no idea
whether there will be more. I don't want to mess around with trying to
count the number of bridges, then go back and add them in another pass.

I think it's fairly clear from http://lkml.org/lkml/2010/4/7/284 that
Windows is paying attention the _CRS, even though there's only one host
bridge. So we ought to be able to make it work, too.

This is not a problem with pci=use_crs. This is only a problem because
we don't reserve the VGA area when we should. That's the problem we
should fix.

Bjorn


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From: Bjorn Helgaas on 8 Apr 2010 09:10
On Wed, 2010-04-07 at 21:42 -0700, H. Peter Anvin wrote:
> On 04/07/2010 08:24 PM, Bjorn Helgaas wrote:
> >
> > I actually did propose doing something in pci_setup_device(), similar to
> > what we already do for legacy IDE resources, but HPA thought it should
> > be done in the arch code instead, again for reasons I don't completely
> > understand.

> "Non-PCI devices" is hard to understand?

I understand that part, and the patch I posted is for the arch code, as
you suggested.

I just thought you were suggesting an x86 change *instead* of something
in PCI, even though it seems like the PCI spec does mention that devices
with VGA class code respond at 0xa0000. Or maybe you were just
suggesting that we should do something in *both* PCI and in the arch
code?

Of course, the PCI part might be complicated by the VGA arbiter,
although I would think that if the system contains at least one VGA
device, reserving the 0xa0000 region once would solve 99% of the
problem. If the arbiter changes the actual device that responds there,
the reservation will be for the wrong device, but we still want to avoid
putting anything else there.

Honestly, I don't know enough about x86_32 vs x86_64 to understand
Yinghai's objection. Is there some platform architecture difference
that means x86_64 can reliably determine whether a non-PCI VGA device is
present, when x86_32 can't? Unless there's a real difference, we ought
to handle them both the same, as my patch does.

Yinghai mentioned a box with no VGA and another device using 0xa0000.
Unless there's some x86_64-specific spec or convention that addresses
this, maybe we could handle that by (1) doing the legacy reservation as
in this patch, and (2) special-casing the PCI device setup so that if we
find a BAR set to that area, we undo the legacy reservation. Or maybe
we just leave the legacy reservation unused and relocate the device that
BIOS left there.

Bjorn


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From: Andy Isaacson on 8 Apr 2010 17:50
On Wed, Apr 07, 2010 at 03:06:28PM -0600, Bjorn Helgaas wrote:
>
> Currently, we only reserve the legacy VGA area [mem 0xa0000-0xbffff] on
> x86_32. But this legacy area is also used on x86_64, so this patch
> reserves it there, too.
>
> If we don't reserve it, we may mistakenly move a PCI device to that area,
> as we did here:
>
> pci_root PNP0A03:00: host bridge window [mem 0xff980800-0xff980bff]
> pci_root PNP0A03:00: host bridge window [mem 0xff97c000-0xff97ffff]
> pci 0000:00:1f.2: no compatible bridge window for [mem 0xff970000-0xff9707ff]
> pci 0000:00:1f.2: BAR 5: assigned [mem 0x000a0000-0x000a07ff]
>
> as reported by Andy Isaacson at http://lkml.org/lkml/2010/4/6/375
>
> I think the fact that the BAR is not within a host bridge window is a
> BIOS defect, and it's now more visible because we have "pci=use_crs" as
> the default. Using "pci=nocrs" is a workaround, because then we won't
> attempt to move the device.

This patch doesn't fix the T3400.

[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 2.6.34-rc3-00300-g29dc2a0 (andy(a)farthing) (gcc version 4.3.3 (Debian 4.3.3-5) ) #6 SMP Thu Apr 8 14:22:20 PDT 2010
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-2.6.34-rc3-00300-g29dc2a0 root=UUID=a2359eda-9295-451c-924f-c181c6f49d0d ro console=tty0 console=ttyS0,115200
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: 0000000000000000 - 000000000009ec00 (usable)
[ 0.000000] BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
[ 0.000000] BIOS-e820: 0000000000100000 - 00000000bfe01c00 (usable)
[ 0.000000] BIOS-e820: 00000000bfe01c00 - 00000000bfe53c00 (ACPI NVS)
[ 0.000000] BIOS-e820: 00000000bfe53c00 - 00000000bfe55c00 (ACPI data)
[ 0.000000] BIOS-e820: 00000000bfe55c00 - 00000000c0000000 (reserved)
[ 0.000000] BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
[ 0.000000] BIOS-e820: 00000000fec00000 - 00000000fed00400 (reserved)
[ 0.000000] BIOS-e820: 00000000fed20000 - 00000000feda0000 (reserved)
[ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fef00000 (reserved)
[ 0.000000] BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)
[ 0.000000] BIOS-e820: 0000000100000000 - 00000001bc000000 (usable)
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] DMI 2.5 present.
[ 0.000000] No AGP bridge found
[ 0.000000] last_pfn = 0x1bc000 max_arch_pfn = 0x400000000
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[ 0.000000] last_pfn = 0xbfe01 max_arch_pfn = 0x400000000
[ 0.000000] found SMP MP-table at [ffff8800000fe710] fe710
[ 0.000000] init_memory_mapping: 0000000000000000-00000000bfe01000
[ 0.000000] init_memory_mapping: 0000000100000000-00000001bc000000
[ 0.000000] RAMDISK: 37c8e000 - 37ff0000
[ 0.000000] ACPI: RSDP 00000000000febf0 00024 (v02 DELL )
[ 0.000000] ACPI: XSDT 00000000000fcea4 0006C (v01 DELL B9K 00000015 ASL 00000061)
[ 0.000000] ACPI: FACP 00000000000fcfcc 000F4 (v03 DELL B9K 00000015 ASL 00000061)
[ 0.000000] ACPI: DSDT 00000000fff5aafd 03794 (v01 DELL dt_ex 00001000 INTL 20050624)
[ 0.000000] ACPI: FACS 00000000bfe01c00 00040
[ 0.000000] ACPI: SSDT 00000000fff5e291 00099 (v01 DELL st_ex 00001000 INTL 20050624)
[ 0.000000] ACPI: APIC 00000000000fd0c0 00092 (v01 DELL B9K 00000015 ASL 00000061)
[ 0.000000] ACPI: BOOT 00000000000fd152 00028 (v01 DELL B9K 00000015 ASL 00000061)
[ 0.000000] ACPI: ASF! 00000000000fd17a 00096 (v32 DELL B9K 00000015 ASL 00000061)
[ 0.000000] ACPI: MCFG 00000000000fd210 0003E (v01 DELL B9K 00000015 ASL 00000061)
[ 0.000000] ACPI: HPET 00000000000fd24e 00038 (v01 DELL B9K 00000015 ASL 00000061)
[ 0.000000] ACPI: TCPA 00000000000fd4aa 00032 (v01 DELL B9K 00000015 ASL 00000061)
[ 0.000000] ACPI: SLIC 00000000000fd286 00176 (v01 DELL B9K 00000015 ASL 00000061)
[ 0.000000] No NUMA configuration found
[ 0.000000] Faking a node at 0000000000000000-00000001bc000000
[ 0.000000] Initmem setup node 0 0000000000000000-00000001bc000000
[ 0.000000] NODE_DATA [0000000100000000 - 0000000100004fff]
[ 0.000000] Zone PFN ranges:
[ 0.000000] DMA 0x00000001 -> 0x00001000
[ 0.000000] DMA32 0x00001000 -> 0x00100000
[ 0.000000] Normal 0x00100000 -> 0x001bc000
[ 0.000000] Movable zone start PFN for each node
[ 0.000000] early_node_map[3] active PFN ranges
[ 0.000000] 0: 0x00000001 -> 0x0000009e
[ 0.000000] 0: 0x00000100 -> 0x000bfe01
[ 0.000000] 0: 0x00100000 -> 0x001bc000
[ 0.000000] ACPI: PM-Timer IO Port: 0x808
[ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x02] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x01] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x02] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x03] disabled)
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] high level lint[0x1])
[ 0.000000] ACPI: IOAPIC (id[0x08] address[0xfec00000] gsi_base[0])
[ 0.000000] IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] ACPI: HPET id: 0x8086a301 base: 0xfed00000
[ 0.000000] SMP: Allowing 8 CPUs, 4 hotplug CPUs
[ 0.000000] PM: Registered nosave memory: 000000000009e000 - 00000000000f0000
[ 0.000000] PM: Registered nosave memory: 00000000000f0000 - 0000000000100000
[ 0.000000] PM: Registered nosave memory: 00000000bfe01000 - 00000000bfe02000
[ 0.000000] PM: Registered nosave memory: 00000000bfe02000 - 00000000bfe53000
[ 0.000000] PM: Registered nosave memory: 00000000bfe53000 - 00000000bfe54000
[ 0.000000] PM: Registered nosave memory: 00000000bfe54000 - 00000000bfe55000
[ 0.000000] PM: Registered nosave memory: 00000000bfe55000 - 00000000bfe56000
[ 0.000000] PM: Registered nosave memory: 00000000bfe56000 - 00000000c0000000
[ 0.000000] PM: Registered nosave memory: 00000000c0000000 - 00000000e0000000
[ 0.000000] PM: Registered nosave memory: 00000000e0000000 - 00000000f0000000
[ 0.000000] PM: Registered nosave memory: 00000000f0000000 - 00000000fec00000
[ 0.000000] PM: Registered nosave memory: 00000000fec00000 - 00000000fed00000
[ 0.000000] PM: Registered nosave memory: 00000000fed00000 - 00000000fed20000
[ 0.000000] PM: Registered nosave memory: 00000000fed20000 - 00000000feda0000
[ 0.000000] PM: Registered nosave memory: 00000000feda0000 - 00000000fee00000
[ 0.000000] PM: Registered nosave memory: 00000000fee00000 - 00000000fef00000
[ 0.000000] PM: Registered nosave memory: 00000000fef00000 - 00000000ffb00000
[ 0.000000] PM: Registered nosave memory: 00000000ffb00000 - 0000000100000000
[ 0.000000] Allocating PCI resources starting at c0000000 (gap: c0000000:20000000)
[ 0.000000] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:8 nr_node_ids:1
[ 0.000000] PERCPU: Embedded 27 pages/cpu @ffff880001e00000 s81896 r8192 d20504 u262144
[ 0.000000] pcpu-alloc: s81896 r8192 d20504 u262144 alloc=1*2097152
[ 0.000000] pcpu-alloc: [0] 0 1 2 3 4 5 6 7
[ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 1531006
[ 0.000000] Policy zone: Normal
[ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-2.6.34-rc3-00300-g29dc2a0 root=UUID=a2359eda-9295-451c-924f-c181c6f49d0d ro console=tty0 console=ttyS0,115200
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] Checking aperture...
[ 0.000000] No AGP bridge found
[ 0.000000] Subtract (62 early reservations)
[ 0.000000] #1 [0001000000 - 0001db1128] TEXT DATA BSS
[ 0.000000] #2 [0037c8e000 - 0037ff0000] RAMDISK
[ 0.000000] #3 [0001db2000 - 0001db21a8] BRK
[ 0.000000] #4 [00000fe720 - 0000100000] BIOS reserved
[ 0.000000] #5 [00000fe710 - 00000fe720] MP-table mpf
[ 0.000000] #6 [000009ec00 - 00000f0000] BIOS reserved
[ 0.000000] #7 [00000f0304 - 00000fe710] BIOS reserved
[ 0.000000] #8 [00000f0000 - 00000f0304] MP-table mpc
[ 0.000000] #9 [0000001000 - 0000003000] TRAMPOLINE
[ 0.000000] #10 [0000003000 - 0000007000] ACPI WAKEUP
[ 0.000000] #11 [0000008000 - 000000b000] PGTABLE
[ 0.000000] #12 [000000b000 - 000000e000] PGTABLE
[ 0.000000] #13 [0100000000 - 0100005000] NODE_DATA
[ 0.000000] #14 [0001db21c0 - 0001db31c0] BOOTMEM
[ 0.000000] #15 [0001db1140 - 0001db15c0] BOOTMEM
[ 0.000000] #16 [0100005000 - 0100006000] BOOTMEM
[ 0.000000] #17 [0100006000 - 0100007000] BOOTMEM
[ 0.000000] #18 [0100200000 - 0105600000] MEMMAP 0
[ 0.000000] #19 [0001db15c0 - 0001db1740] BOOTMEM
[ 0.000000] #20 [0001db31c0 - 0001dcb1c0] BOOTMEM
[ 0.000000] #21 [0001dcb1c0 - 0001de31c0] BOOTMEM
[ 0.000000] #22 [0001de4000 - 0001de5000] BOOTMEM
[ 0.000000] #23 [0001db1740 - 0001db1781] BOOTMEM
[ 0.000000] #24 [0001db17c0 - 0001db1803] BOOTMEM
[ 0.000000] #25 [0001db1840 - 0001db1b18] BOOTMEM
[ 0.000000] #26 [0001db1b40 - 0001db1ba8] BOOTMEM
[ 0.000000] #27 [0001db1bc0 - 0001db1c28] BOOTMEM
[ 0.000000] #28 [0001db1c40 - 0001db1ca8] BOOTMEM
[ 0.000000] #29 [0001db1cc0 - 0001db1d28] BOOTMEM
[ 0.000000] #30 [0001db1d40 - 0001db1da8] BOOTMEM
[ 0.000000] #31 [0001db1dc0 - 0001db1e28] BOOTMEM
[ 0.000000] #32 [0001db1e40 - 0001db1ea8] BOOTMEM
[ 0.000000] #33 [0001db1ec0 - 0001db1f28] BOOTMEM
[ 0.000000] #34 [0001db1f40 - 0001db1fa8] BOOTMEM
[ 0.000000] #35 [0001de31c0 - 0001de3228] BOOTMEM
[ 0.000000] #36 [0001de3240 - 0001de32a8] BOOTMEM
[ 0.000000] #37 [0001de32c0 - 0001de3328] BOOTMEM
[ 0.000000] #38 [0001db1fc0 - 0001db1fe0] BOOTMEM
[ 0.000000] #39 [0001de3340 - 0001de3360] BOOTMEM
[ 0.000000] #40 [0001de3380 - 0001de3402] BOOTMEM
[ 0.000000] #41 [0001de3440 - 0001de34c2] BOOTMEM
[ 0.000000] #42 [0001e00000 - 0001e1b000] BOOTMEM
[ 0.000000] #43 [0001e40000 - 0001e5b000] BOOTMEM
[ 0.000000] #44 [0001e80000 - 0001e9b000] BOOTMEM
[ 0.000000] #45 [0001ec0000 - 0001edb000] BOOTMEM
[ 0.000000] #46 [0001f00000 - 0001f1b000] BOOTMEM
[ 0.000000] #47 [0001f40000 - 0001f5b000] BOOTMEM
[ 0.000000] #48 [0001f80000 - 0001f9b000] BOOTMEM
[ 0.000000] #49 [0001fc0000 - 0001fdb000] BOOTMEM
[ 0.000000] #50 [0001de3500 - 0001de3508] BOOTMEM
[ 0.000000] #51 [0001de3540 - 0001de3548] BOOTMEM
[ 0.000000] #52 [0001de3580 - 0001de35a0] BOOTMEM
[ 0.000000] #53 [0001de35c0 - 0001de3600] BOOTMEM
[ 0.000000] #54 [0001de3600 - 0001de3720] BOOTMEM
[ 0.000000] #55 [0001de3740 - 0001de3788] BOOTMEM
[ 0.000000] #56 [0001de37c0 - 0001de3808] BOOTMEM
[ 0.000000] #57 [0001de5000 - 0001ded000] BOOTMEM
[ 0.000000] #58 [0001fdb000 - 0005fdb000] BOOTMEM
[ 0.000000] #59 [0001e1b000 - 0001e3b000] BOOTMEM
[ 0.000000] #60 [0005fdb000 - 000601b000] BOOTMEM
[ 0.000000] #61 [000000f000 - 0000017000] BOOTMEM
[ 0.000000] Memory: 6052848k/7274496k available (5342k kernel code, 1051016k absent, 170632k reserved, 6534k data, 612k init)
[ 0.000000] SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] NR_IRQS:2304
[ 0.000000] Console: colour VGA+ 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] console [ttyS0] enabled
[ 0.000000] Fast TSC calibration using PIT
[ 0.000000] Detected 2394.110 MHz processor.
[ 0.002005] Calibrating delay loop (skipped), value calculated using timer frequency.. 4788.22 BogoMIPS (lpj=2394110)
[ 0.004021] Security Framework initialized
[ 0.005005] SELinux: Initializing.
[ 0.007315] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
[ 0.013568] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
[ 0.017320] Mount-cache hash table entries: 256
[ 0.018183] Initializing cgroup subsys ns
[ 0.019007] Initializing cgroup subsys cpuacct
[ 0.020005] Initializing cgroup subsys blkio
[ 0.021033] CPU: Physical Processor ID: 0
[ 0.022002] CPU: Processor Core ID: 0
[ 0.023003] using mwait in idle threads.
[ 0.024002] Performance Events: Core2 events, Intel PMU driver.
[ 0.027003] ... version: 2
[ 0.028002] ... bit width: 40
[ 0.029002] ... generic registers: 2
[ 0.030002] ... value mask: 000000ffffffffff
[ 0.031002] ... max period: 000000007fffffff
[ 0.032002] ... fixed-purpose events: 3
[ 0.033002] ... event mask: 0000000700000003
[ 0.034039] ACPI: Core revision 20100121
[ 0.201067] Setting APIC routing to flat
[ 0.202471] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 0.213983] CPU0: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz stepping 0b
[ 0.216999] Booting Node 0, Processors #1 #2 #3
[ 0.433006] Brought up 4 CPUs
[ 0.434002] Total of 4 processors activated (19151.52 BogoMIPS).
[ 0.436089] khelper used greatest stack depth: 6008 bytes left
[ 0.443352] Time: 21:27:42 Date: 04/08/10
[ 0.444032] NET: Registered protocol family 16
[ 0.445035] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
[ 0.446007] ACPI: bus type pci registered
[ 0.448045] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0xe0000000-0xefffffff] (base 0xe0000000)
[ 0.449003] PCI: MMCONFIG at [mem 0xe0000000-0xefffffff] reserved in E820
[ 0.472120] PCI: Using configuration type 1 for base access
[ 0.485021] bio: create slab <bio-0> at 0
[ 0.517507] ACPI: BIOS _OSI(Linux) query ignored
[ 0.564263] ACPI: Interpreter enabled
[ 0.568002] ACPI: (supports S0 S1 S3 S4 S5)
[ 0.572778] ACPI: Using IOAPIC for interrupt routing
[ 0.762201] ACPI Warning: Incorrect checksum in table [TCPA] - 00, should be 87 (20100121/tbutils-314)
[ 0.772002] ACPI: No dock devices found.
[ 0.776002] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.795092] ACPI: PCI Root Bridge [PCI0] (0000:00)
[ 0.821199] pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7]
[ 0.828002] pci_root PNP0A03:00: host bridge window [io 0x0d00-0xffff]
[ 0.835002] pci_root PNP0A03:00: host bridge window [mem 0x000a0000-0x000bffff]
[ 0.842002] pci_root PNP0A03:00: host bridge window [mem 0x000c0000-0x000effff]
[ 0.850001] pci_root PNP0A03:00: host bridge window [mem 0x000f0000-0x000fffff]
[ 0.857002] pci_root PNP0A03:00: host bridge window [mem 0xf0000000-0xfebfffff]
[ 0.865001] pci_root PNP0A03:00: host bridge window [mem 0xbff00000-0xdfffffff]
[ 0.872002] pci_root PNP0A03:00: host bridge window [mem 0xff980800-0xff980bff]
[ 0.880001] pci_root PNP0A03:00: host bridge window [mem 0xff97c000-0xff97ffff]
[ 0.887001] pci_root PNP0A03:00: host bridge window [mem 0xfed20000-0xfed9ffff]
[ 0.895868] pci 0000:00:1f.0: quirk: [io 0x0800-0x087f] claimed by ICH6 ACPI/GPIO/TCO
[ 0.904003] pci 0000:00:1f.0: quirk: [io 0x0880-0x08bf] claimed by ICH6 GPIO
[ 0.911003] pci 0000:00:1f.0: ICH7 LPC Generic IO decode 1 PIO at 0c00 (mask 007f)
[ 0.919002] pci 0000:00:1f.0: ICH7 LPC Generic IO decode 2 PIO at 00e0 (mask 0007)
[ 0.927257] pci 0000:00:01.0: PCI bridge to [bus 01-01]
[ 0.933033] pci 0000:00:06.0: PCI bridge to [bus 02-02]
[ 0.938047] pci 0000:00:1c.0: PCI bridge to [bus 03-03]
[ 0.943194] pci 0000:00:1c.5: PCI bridge to [bus 04-04]
[ 0.949145] pci 0000:00:1e.0: PCI bridge to [bus 05-05] (subtractive decode)
[ 2.982594] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11 12 15)
[ 2.991196] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 *10 11 12 15)
[ 2.999778] ACPI: PCI Interrupt Link [LNKC] (IRQs *3 4 5 6 7 9 10 11 12 15)
[ 3.008382] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 11 12 15) *0, disabled.
[ 3.018361] ACPI: PCI Interrupt Link [LNKE] (IRQs *3 4 5 6 7 9 10 11 12 15)
[ 3.026772] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 11 12 15) *0, disabled.
[ 3.036785] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 *9 10 11 12 15)
[ 3.045542] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 *5 6 7 9 10 11 12 15)
[ 3.053196] vgaarb: device added: PCI:0000:01:00.0,decodes=io+mem,owns=io+mem,locks=none
[ 3.062003] vgaarb: loaded
[ 3.065075] SCSI subsystem initialized
[ 3.069035] usbcore: registered new interface driver usbfs
[ 3.075019] usbcore: registered new interface driver hub
[ 3.080021] usbcore: registered new device driver usb
[ 3.086033] Advanced Linux Sound Architecture Driver Version 1.0.22.1.
[ 3.093002] PCI: Using ACPI for IRQ routing
[ 3.097036] pci 0000:00:1f.2: no compatible bridge window for [mem 0xff970000-0xff9707ff]
[ 3.105042] Expanded resource reserved due to conflict with PCI Bus 0000:00
[ 3.113047] cfg80211: Calling CRDA to update world regulatory domain
[ 3.119015] NetLabel: Initializing
[ 3.124001] NetLabel: domain hash size = 128
[ 3.128001] NetLabel: protocols = UNLABELED CIPSOv4
[ 3.133011] NetLabel: unlabeled traffic allowed by default
[ 3.139004] HPET: 4 timers in total, 0 timers will be used for per-cpu timer
[ 3.146004] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0
[ 3.151372] hpet0: 4 comparators, 64-bit 14.318180 MHz counter
[ 3.160021] Switching to clocksource tsc
[ 3.173645] pnp: PnP ACPI init
[ 3.176899] ACPI: bus type pnp registered
[ 3.197841] pnp 00:01: disabling [io 0x0800-0x085f] because it overlaps 0000:00:1f.0 BAR 7 [io 0x0800-0x087f]
[ 3.208245] pnp 00:01: disabling [io 0x0860-0x08ff] because it overlaps 0000:00:1f.0 BAR 7 [io 0x0800-0x087f]
[ 3.282787] pnp: PnP ACPI: found 12 devices
[ 3.287157] ACPI: ACPI bus type pnp unregistered
[ 3.291958] system 00:01: [io 0x0c00-0x0c7f] has been reserved
[ 3.303431] pci 0000:00:1c.0: BAR 9: assigned [mem 0xf0000000-0xf01fffff 64bit pref]
[ 3.311489] pci 0000:00:1c.5: BAR 9: assigned [mem 0xf0200000-0xf03fffff 64bit pref]
[ 3.319543] pci 0000:00:1c.0: BAR 7: assigned [io 0x1000-0x1fff]
[ 3.325808] pci 0000:00:1c.5: BAR 7: assigned [io 0x2000-0x2fff]
[ 3.332077] pci 0000:00:1f.2: BAR 5: assigned [mem 0x000c0000-0x000c07ff]
[ 3.339037] pci 0000:00:1f.2: BAR 5: set to [mem 0x000c0000-0x000c07ff] (PCI address [0xc0000-0xc07ff]
[ 3.348651] pci 0000:00:01.0: PCI bridge to [bus 01-01]
[ 3.354050] pci 0000:00:01.0: bridge window [io 0xd000-0xdfff]
[ 3.360320] pci 0000:00:01.0: bridge window [mem 0xfa000000-0xfdefffff]
[ 3.367284] pci 0000:00:01.0: bridge window [mem 0xd0000000-0xdfffffff 64bit pref]
[ 3.375350] pci 0000:00:06.0: PCI bridge to [bus 02-02]
[ 3.380748] pci 0000:00:06.0: bridge window [io disabled]
[ 3.386581] pci 0000:00:06.0: bridge window [mem disabled]
[ 3.392414] pci 0000:00:06.0: bridge window [mem pref disabled]
[ 3.398683] pci 0000:00:1c.0: PCI bridge to [bus 03-03]
[ 3.404087] pci 0000:00:1c.0: bridge window [io 0x1000-0x1fff]
[ 3.410356] pci 0000:00:1c.0: bridge window [mem 0xf9f00000-0xf9ffffff]
[ 3.417321] pci 0000:00:1c.0: bridge window [mem 0xf0000000-0xf01fffff 64bit pref]
[ 3.425388] pci 0000:00:1c.5: PCI bridge to [bus 04-04]
[ 3.430788] pci 0000:00:1c.5: bridge window [io 0x2000-0x2fff]
[ 3.437056] pci 0000:00:1c.5: bridge window [mem 0xf9e00000-0xf9efffff]
[ 3.444017] pci 0000:00:1c.5: bridge window [mem 0xf0200000-0xf03fffff 64bit pref]
[ 3.452079] pci 0000:00:1e.0: PCI bridge to [bus 05-05]
[ 3.457479] pci 0000:00:1e.0: bridge window [io disabled]
[ 3.463319] pci 0000:00:1e.0: bridge window [mem 0xf9d00000-0xf9dfffff]
[ 3.470282] pci 0000:00:1e.0: bridge window [mem pref disabled]
[ 3.476558] pci 0000:00:01.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 3.483435] pci 0000:00:06.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 3.490318] pci 0000:00:1c.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 3.497209] pci 0000:00:1c.5: PCI INT B -> GSI 17 (level, low) -> IRQ 17
[ 3.504185] NET: Registered protocol family 2
[ 3.508920] IP route cache hash table entries: 262144 (order: 9, 2097152 bytes)
[ 3.517903] TCP established hash table entries: 524288 (order: 11, 8388608 bytes)
[ 3.530505] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
[ 3.538017] TCP: Hash tables configured (established 524288 bind 65536)
[ 3.544805] TCP reno registered
[ 3.548147] UDP hash table entries: 4096 (order: 5, 131072 bytes)
[ 3.554509] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes)
[ 3.561434] NET: Registered protocol family 1
[ 3.566201] RPC: Registered udp transport module.
[ 3.571088] RPC: Registered tcp transport module.
[ 3.575969] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 4.693019] pci 0000:00:1d.7: EHCI: BIOS handoff failed (BIOS bug?) 01010001
[ 4.700455] Trying to unpack rootfs image as initramfs...
[ 4.771225] Freeing initrd memory: 3464k freed
[ 4.776924] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[ 4.783544] Placing 64MB software IO TLB between ffff880001fdb000 - ffff880005fdb000
[ 4.791588] software IO TLB at phys 0x1fdb000 - 0x5fdb000
[ 4.797392] Simple Boot Flag at 0x7a set to 0x1
[ 4.803990] microcode: CPU0 sig=0x6fb, pf=0x10, revision=0xb3
[ 4.809909] microcode: CPU1 sig=0x6fb, pf=0x10, revision=0xb3
[ 4.815825] microcode: CPU2 sig=0x6fb, pf=0x10, revision=0xb3
[ 4.821743] microcode: CPU3 sig=0x6fb, pf=0x10, revision=0xb3
[ 4.831321] microcode: Microcode Update Driver: v2.00 <tigran(a)aivazian.fsnet.co.uk>, Peter Oruba
[ 4.840768] audit: initializing netlink socket (disabled)
[ 4.846360] type=2000 audit(1270762064.846:1): initialized
[ 4.870704] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 4.881160] VFS: Disk quotas dquot_6.5.2
[ 4.885349] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 4.893253] msgmni has been set to 11828
[ 4.898070] alg: No test for stdrng (krng)
[ 4.902481] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
[ 4.910199] io scheduler noop registered
[ 4.914292] io scheduler deadline registered
[ 4.918881] io scheduler cfq registered (default)
[ 4.924851] pcieport 0000:00:01.0: Requesting control of PCIe PME from ACPI BIOS
[ 4.932557] pcieport 0000:00:01.0: Failed to receive control of PCIe PME service: no _OSC support
[ 4.941725] pcie_pme: probe of 0000:00:01.0:pcie01 failed with error -13
[ 4.948593] pcieport 0000:00:06.0: Requesting control of PCIe PME from ACPI BIOS
[ 4.956298] pcieport 0000:00:06.0: Failed to receive control of PCIe PME service: no _OSC support
[ 4.965467] pcie_pme: probe of 0000:00:06.0:pcie01 failed with error -13
[ 4.972334] pcieport 0000:00:1c.0: Requesting control of PCIe PME from ACPI BIOS
[ 4.980034] pcieport 0000:00:1c.0: Failed to receive control of PCIe PME service: no _OSC support
[ 4.989212] pcie_pme: probe of 0000:00:1c.0:pcie01 failed with error -13
[ 4.996086] pcieport 0000:00:1c.5: Requesting control of PCIe PME from ACPI BIOS
[ 5.003781] pcieport 0000:00:1c.5: Failed to receive control of PCIe PME service: no _OSC support
[ 5.012950] pcie_pme: probe of 0000:00:1c.5:pcie01 failed with error -13
[ 5.019925] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 5.026064] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
[ 5.034718] ACPI: Power Button [VBTN]
[ 5.038646] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
[ 5.046350] ACPI: Power Button [PWRF]
[ 5.220953] Non-volatile memory driver v1.3
[ 5.225312] Linux agpgart interface v0.103
[ 5.229767] [drm] Initialized drm 1.1.0 20060810
[ 5.234556] [drm:i915_init] *ERROR* drm/i915 can't work without intel_agp module!
[ 5.242348] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
�[ 5.493338] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 5.500096] 00:0a: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 5.508624] brd: module loaded
[ 5.513142] loop: module loaded
[ 5.516579] Loading iSCSI transport class v2.0-870.
[ 5.522209] ahci 0000:00:1f.2: PCI INT C -> GSI 20 (level, low) -> IRQ 20
[ 5.584017] ------------[ cut here ]------------
[ 5.588813] WARNING: at drivers/ata/ahci.c:795 ahci_enable_ahci+0x52/0x5b()
[ 5.595938] Hardware name: Precision WorkStation T3400
[ 5.601417] Modules linked in:
[ 5.604699] Pid: 1, comm: swapper Not tainted 2.6.34-rc3-00300-g29dc2a0 #6
[ 5.611737] Call Trace:
[ 5.614358] [<ffffffff812ec086>] ? ahci_enable_ahci+0x52/0x5b
[ 5.620359] [<ffffffff810390b2>] warn_slowpath_common+0x77/0xa4
[ 5.626532] [<ffffffff810390ee>] warn_slowpath_null+0xf/0x11
[ 5.632444] [<ffffffff812ec086>] ahci_enable_ahci+0x52/0x5b
[ 5.638269] [<ffffffff812ed972>] ahci_init_one+0x370/0x1145
[ 5.644108] [<ffffffff811d8a0a>] ? ida_get_new_above+0xfd/0x1b4
[ 5.650281] [<ffffffff811d8815>] ? idr_get_empty_slot+0x169/0x261
[ 5.656626] [<ffffffff811d8a0a>] ? ida_get_new_above+0xfd/0x1b4
[ 5.662800] [<ffffffff8112f894>] ? sysfs_find_dirent+0x1c/0x31
[ 5.668885] [<ffffffff8112fc2a>] ? sysfs_add_one+0x1c/0xe7
[ 5.674624] [<ffffffff811d95ca>] ? kobject_get+0x1a/0x22
[ 5.680200] [<ffffffff811ee6d3>] local_pci_probe+0x12/0x16
[ 5.685940] [<ffffffff811ef5a6>] pci_device_probe+0xc6/0xf0
[ 5.691766] [<ffffffff812b10a0>] ? driver_sysfs_add+0x4c/0x72
[ 5.697766] [<ffffffff812b11ec>] driver_probe_device+0xad/0x15f
[ 5.703939] [<ffffffff812b12f6>] __driver_attach+0x58/0x7b
[ 5.709678] [<ffffffff812b129e>] ? __driver_attach+0x0/0x7b
[ 5.715504] [<ffffffff812b0a51>] bus_for_each_dev+0x4e/0x84
[ 5.721329] [<ffffffff812b1052>] driver_attach+0x1c/0x1e
[ 5.726895] [<ffffffff812b03a7>] bus_add_driver+0xb8/0x20e
[ 5.732633] [<ffffffff812b15ea>] driver_register+0xb3/0x121
[ 5.738461] [<ffffffff81bdc461>] ? ahci_init+0x0/0x1b
[ 5.743767] [<ffffffff811ef7f8>] __pci_register_driver+0x51/0xbc
[ 5.750030] [<ffffffff81bdc461>] ? ahci_init+0x0/0x1b
[ 5.755336] [<ffffffff81bdc47a>] ahci_init+0x19/0x1b
[ 5.760557] [<ffffffff810001f0>] do_one_initcall+0x5a/0x14a
[ 5.766384] [<ffffffff81baf69d>] kernel_init+0x154/0x1de
[ 5.771952] [<ffffffff810037b4>] kernel_thread_helper+0x4/0x10
[ 5.778038] [<ffffffff81baf549>] ? kernel_init+0x0/0x1de
[ 5.783605] [<ffffffff810037b0>] ? kernel_thread_helper+0x0/0x10
[ 5.789866] ---[ end trace 941a3246270f5a35 ]---
[ 5.794758] ahci: SSS flag set, parallel bus scan disabled
[ 5.855017] ------------[ cut here ]------------
[ 5.859809] WARNING: at drivers/ata/ahci.c:795 ahci_enable_ahci+0x52/0x5b()
[ 5.866931] Hardware name: Precision WorkStation T3400
[ 5.872410] Modules linked in:
[ 5.875692] Pid: 1, comm: swapper Tainted: G W 2.6.34-rc3-00300-g29dc2a0 #6
[ 5.883646] Call Trace:
[ 5.886268] [<ffffffff812ec086>] ? ahci_enable_ahci+0x52/0x5b
[ 5.892269] [<ffffffff810390b2>] warn_slowpath_common+0x77/0xa4
[ 5.898441] [<ffffffff810390ee>] warn_slowpath_null+0xf/0x11
[ 5.904352] [<ffffffff812ec086>] ahci_enable_ahci+0x52/0x5b
[ 5.910177] [<ffffffff812ec0bb>] ahci_reset_controller+0x2c/0x14a
[ 5.916523] [<ffffffff812ee2b6>] ahci_init_one+0xcb4/0x1145
[ 5.922349] [<ffffffff811d8a0a>] ? ida_get_new_above+0xfd/0x1b4
[ 5.928521] [<ffffffff811d8815>] ? idr_get_empty_slot+0x169/0x261
[ 5.934867] [<ffffffff811d8a0a>] ? ida_get_new_above+0xfd/0x1b4
[ 5.941039] [<ffffffff8112f894>] ? sysfs_find_dirent+0x1c/0x31
[ 5.947124] [<ffffffff8112fc2a>] ? sysfs_add_one+0x1c/0xe7
[ 5.952864] [<ffffffff811d95ca>] ? kobject_get+0x1a/0x22
[ 5.958429] [<ffffffff811ee6d3>] local_pci_probe+0x12/0x16
[ 5.964167] [<ffffffff811ef5a6>] pci_device_probe+0xc6/0xf0
[ 5.969993] [<ffffffff812b10a0>] ? driver_sysfs_add+0x4c/0x72
[ 5.975991] [<ffffffff812b11ec>] driver_probe_device+0xad/0x15f
[ 5.982162] [<ffffffff812b12f6>] __driver_attach+0x58/0x7b
[ 5.987900] [<ffffffff812b129e>] ? __driver_attach+0x0/0x7b
[ 5.993725] [<ffffffff812b0a51>] bus_for_each_dev+0x4e/0x84
[ 5.999551] [<ffffffff812b1052>] driver_attach+0x1c/0x1e
[ 6.005118] [<ffffffff812b03a7>] bus_add_driver+0xb8/0x20e
[ 6.010857] [<ffffffff812b15ea>] driver_register+0xb3/0x121
[ 6.016684] [<ffffffff81bdc461>] ? ahci_init+0x0/0x1b
[ 6.021988] [<ffffffff811ef7f8>] __pci_register_driver+0x51/0xbc
[ 6.028247] [<ffffffff81bdc461>] ? ahci_init+0x0/0x1b
[ 6.033553] [<ffffffff81bdc47a>] ahci_init+0x19/0x1b
[ 6.038774] [<ffffffff810001f0>] do_one_initcall+0x5a/0x14a
[ 6.044600] [<ffffffff81baf69d>] kernel_init+0x154/0x1de
[ 6.050166] [<ffffffff810037b4>] kernel_thread_helper+0x4/0x10
[ 6.056252] [<ffffffff81baf549>] ? kernel_init+0x0/0x1de
[ 6.061816] [<ffffffff810037b0>] ? kernel_thread_helper+0x0/0x10
[ 6.068074] ---[ end trace 941a3246270f5a36 ]---
[ 7.073018] ahci 0000:00:1f.2: controller reset failed (0x3034374b)
[ 7.079480] ahci 0000:00:1f.2: PCI INT C disabled
[ 7.084358] ahci: probe of 0000:00:1f.2 failed with error -5

-andy
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From: Andy Isaacson on 9 Apr 2010 18:30
On Fri, Apr 09, 2010 at 12:55:39PM -0700, Yinghai wrote:
> update version for test
>
> Subject: [PATCH] x86: reserve [0xa0000, 0x100000] in e820
>
> Update e820 at first, and later put them resource tree.
> But give pci BAR chance to claim the range, before assign unassigned resources.
>
> In case some system doesn't have VGA, and use [0xa0000, ..] for mmio of some
> other pci devices.

This doesn't help, my AHCI still fails to initialize in the same way.

-andy
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