Yes post 2.6.25 changed to trust the ACPI motherboard resources
to signify working mmcfg, previously it would use the e820 table
which excluded near all motherboards which were not white listed
by PCI-ID because BIOS programmers were generally not aware
they had to reserve mcfg in e820.
You can verify this by booting with pci=nommconf. If it works
then it's likely that.
The new heuristic is apparently the same as what Vista does.
Robert Hancock (cc'ed, fullquote) is mr. mmconfig quirk.
-Andi
quoted text >
> ACPI: bus type pci registered
> -PCI: BIOS Bug: MCFG area at f8000000 is not E820-reserved
> +PCI: MCFG configuration 0: base f8000000 segment 0 buses 0 - 63
> PCI: Not using MMCONFIG.
>
> ACPI: Using IOAPIC for interrupt routing
> +PCI: MCFG configuration 0: base f8000000 segment 0 buses 0 - 63
> +PCI: MCFG area at f8000000 reserved in ACPI motherboard resources
> +PCI: Using MMCONFIG for extended config space
> ACPI: EC: GPE = 0x16, I/O: command/status = 0x66, data = 0x62
>
> IO window: 0x00007400-0x000074ff
> - PREFETCH window: 0x60000000-0x63ffffff
> - MEM window: 0x64000000-0x67ffffff
> + MEM window: 0x60000000-0x63ffffff
> PCI: Bridge: 0000:00:1e.0
> IO window: 7000-7fff
> MEM window: 0xe8100000-0xe83fffff
> - PREFETCH window: 0x0000000060000000-0x0000000063ffffff
> + PREFETCH window: disabled.
>
> so a quirk that triggered previously does not seem to trigger anymore.
>
> find below some of the other deltas. I edited out the dmesg deltas that
> i considered non-interesting - this should make it shorter/easier for
> others to review the changes.
>
> Ingo
>
> --- dmesg-2.6.25.8.txt 2008-08-10 21:49:49.000000000 +0200
> +++ dmesg-2.6.26.2.txt 2008-08-10 21:49:50.000000000 +0200
> @@ -112,13 +111,14 @@ CPU: Processor Core ID: 0
> Intel machine check architecture supported.
> Intel machine check reporting enabled on CPU#0.
> using mwait in idle threads.
> -Compat vDSO mapped to ffffe000.
> Checking 'hlt' instruction... OK.
> -ACPI: Core revision 20070126
> +ACPI: Core revision 20080321
> +ENABLING IO-APIC IRQs
> +..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
> CPU0: Intel Genuine Intel(R) CPU T2050 @ 1.60GHz stepping 08
> @@ -126,32 +126,33 @@ CPU: Processor Core ID: 1
> Intel machine check architecture supported.
> Intel machine check reporting enabled on CPU#1.
> CPU1: Intel Genuine Intel(R) CPU T2050 @ 1.60GHz stepping 08
> -Total of 2 processors activated (6387.08 BogoMIPS).
> -ENABLING IO-APIC IRQs
> -..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
> checking TSC synchronization [CPU#0 -> CPU#1]: passed.
> Brought up 2 CPUs
> No dock devices found.
> ACPI: bus type pci registered
> -PCI: BIOS Bug: MCFG area at f8000000 is not E820-reserved
> +PCI: MCFG configuration 0: base f8000000 segment 0 buses 0 - 63
> PCI: Not using MMCONFIG.
> PCI: PCI BIOS revision 2.10 entry at 0xf0322, last bus=32
> -PCI: Using configuration type 1
> +PCI: Using configuration type 1 for base access
> Setting up standard PCI resources
> ACPI: EC: Look up EC in DSDT
> ACPI: EC: non-query interrupt received, switching to interrupt mode
> ACPI: Interpreter enabled
> ACPI: (supports S0 S3 S4 S5)
> ACPI: Using IOAPIC for interrupt routing
> +PCI: MCFG configuration 0: base f8000000 segment 0 buses 0 - 63
> +PCI: MCFG area at f8000000 reserved in ACPI motherboard resources
> +PCI: Using MMCONFIG for extended config space
> ACPI: EC: GPE = 0x16, I/O: command/status = 0x66, data = 0x62
> ACPI: EC: driver started in interrupt mode
> ACPI: PCI Root Bridge [C002] (0000:00)
> @@ -170,14 +171,13 @@ ACPI: PCI Interrupt Link [C111] (IRQs *1
> ACPI: PCI Interrupt Link [C12A] (IRQs *10 11)
> ACPI: PCI Interrupt Link [C12B] (IRQs 10 *11)
> ACPI: PCI Interrupt Link [C12C] (IRQs 10 11) *0, disabled.
> -ACPI Exception (pci_link-0184): AE_NOT_FOUND, Evaluating _PRS [20070126]
> +ACPI Exception (pci_link-0184): AE_NOT_FOUND, Evaluating _PRS [20080321]
> ACPI: Power Resource [C21A] (on)
> ACPI: Power Resource [C222] (off)
> ACPI: Power Resource [C321] (off)
> ACPI: Power Resource [C322] (off)
> ACPI: Power Resource [C323] (off)
> ACPI: Power Resource [C324] (off)
> -ACPI: WMI: Mapper loaded
> Linux Plug and Play Support v0.97 (c) Adam Belay
> pnp: PnP ACPI init
> ACPI: bus type pnp registered
> @@ -186,7 +186,6 @@ ACPI: ACPI bus type pnp unregistered
> SCSI subsystem initialized
> libata version 3.00 loaded.
> PCI: Using ACPI for IRQ routing
> -PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report
> hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
> hpet0: 3 64-bit timers, 14318180 Hz
> ACPI: RTC can wake from S4
> @@ -208,6 +207,7 @@ system 00:0a: iomem range 0xfed45000-0xf
> system 00:0a: iomem range 0xfed90000-0xfed9afff could not be reserved
> system 00:0b: iomem range 0xfeda0000-0xfedbffff could not be reserved
> system 00:0b: iomem range 0xfee00000-0xfee00fff could not be reserved
> +PCI: region 0000:02:06.0/9 too large: 0x0000000000000000-0x0000000003ffffff
> PCI: Bridge: 0000:00:1c.0
> IO window: disabled.
> MEM window: 0xe8000000-0xe80fffff
> @@ -223,12 +223,11 @@ PCI: Bridge: 0000:00:1c.3
> PCI: Bus 3, cardbus bridge: 0000:02:06.0
> IO window: 0x00007000-0x000070ff
> IO window: 0x00007400-0x000074ff
> - PREFETCH window: 0x60000000-0x63ffffff
> - MEM window: 0x64000000-0x67ffffff
> + MEM window: 0x60000000-0x63ffffff
> PCI: Bridge: 0000:00:1e.0
> IO window: 7000-7fff
> MEM window: 0xe8100000-0xe83fffff
> - PREFETCH window: 0x0000000060000000-0x0000000063ffffff
> + PREFETCH window: disabled.
> ACPI: PCI Interrupt 0000:00:1c.0[A] -> GSI 16 (level, low) -> IRQ 16
> PCI: Setting latency timer of device 0000:00:1c.0 to 64
> ACPI: PCI Interrupt 0000:00:1c.2[C] -> GSI 18 (level, low) -> IRQ 18
> @@ -243,9 +242,11 @@ TCP established hash table entries: 1310
> TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
> TCP: Hash tables configured (established 131072 bind 65536)
> TCP reno registered
> +NET: Registered protocol family 1
> audit: initializing netlink socket (disabled)
> -type=2000 audit(1218404726.442:1): initialized
> +type=2000 audit(1218404863.342:1): initialized
> highmem bounce pool size: 64 pages
> +msgmni has been set to 1757
> io scheduler noop registered
> io scheduler anticipatory registered
> io scheduler deadline registered
> @@ -255,21 +256,22 @@ PCI: Setting latency timer of device 000
> assign_interrupt_mode Found MSI capability
> Allocate Port Service[0000:00:1c.0:pcie00]
> Allocate Port Service[0000:00:1c.0:pcie02]
> +Allocate Port Service[0000:00:1c.0:pcie03]
> PCI: Setting latency timer of device 0000:00:1c.2 to 64
> assign_interrupt_mode Found MSI capability
> Allocate Port Service[0000:00:1c.2:pcie00]
> Allocate Port Service[0000:00:1c.2:pcie02]
> +Allocate Port Service[0000:00:1c.2:pcie03]
> PCI: Setting latency timer of device 0000:00:1c.3 to 64
> assign_interrupt_mode Found MSI capability
> Allocate Port Service[0000:00:1c.3:pcie00]
> Allocate Port Service[0000:00:1c.3:pcie02]
> +Allocate Port Service[0000:00:1c.3:pcie03]
> vesafb: framebuffer at 0xd0000000, mapped to 0xf8880000, using 6144k, total 7872k
> vesafb: mode is 1024x768x32, linelength=4096, pages=1
> vesafb: scrolling: redraw
> vesafb: Truecolor: size=8:8:8:8, shift=24:16:8:0
> Console: switching to colour frame buffer device 128x48
> @@ -297,21 +301,8 @@ hpet_resources: 0xfed00000 is busy
> intel_rng: FWH not detected
> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
> brd: module loaded
> -Uniform Multi-Platform E-IDE driver
> -ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> -ICH7: IDE controller (0x8086:0x27df rev 0x01) at PCI slot 0000:00:1f.1
> -ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 16 (level, low) -> IRQ 16
> -ICH7: not 100% native mode: will probe irqs later
> -ICH7: IDE port disabled
> - ide0: BM-DMA at 0x60a0-0x60a7, BIOS settings: hda:DMA, hdb:PIO
> -Probing IDE interface ide0...
> -hda: MATSHITADVD-RAM UJ-840S, ATAPI CD/DVD-ROM drive
> -hda: host max PIO4 wanted PIO255(auto-tune) selected PIO4
> -hda: MWDMA2 mode selected
> -ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> -hda: ATAPI 24X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache
> -Uniform CD-ROM driver Revision: 3.20
> Driver 'sd' needs updating - please use bus_type methods
> +Driver 'sr' needs updating - please use bus_type methods
> ahci 0000:00:1f.2: version 3.0
> ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 17 (level, low) -> IRQ 17
> ahci 0000:00:1f.2: AHCI 0001.0100 32 slots 4 ports 1.5 Gbps 0x1 impl SATA mode
> @@ -329,13 +320,13 @@ ata1: SATA link up 1.5 Gbps (SStatus 113
> ata1.00: ACPI cmd f5/00:00:00:00:00:a0 filtered out
> ata1.00: ACPI cmd b1/c1:00:00:00:00:a0 filtered out
> ata1.00: ACPI cmd c6/00:10:00:00:00:a0 succeeded
> -ata1.00: ACPI cmd ef/10:03:00:00:00:a0 succeeded
> +ata1.00: ACPI cmd ef/10:03:00:00:00:a0 filtered out
> ata1.00: ATA-7: ST9120822AS, 3.ALC, max UDMA/133
> ata1.00: 234441648 sectors, multi 16: LBA48 NCQ (depth 31/32)
> ata1.00: ACPI cmd f5/00:00:00:00:00:a0 filtered out
> ata1.00: ACPI cmd b1/c1:00:00:00:00:a0 filtered out
> ata1.00: ACPI cmd c6/00:10:00:00:00:a0 succeeded
> -ata1.00: ACPI cmd ef/10:03:00:00:00:a0 succeeded
> +ata1.00: ACPI cmd ef/10:03:00:00:00:a0 filtered out
> ata1.00: configured for UDMA/133
> ata1.00: configured for UDMA/133
> ata1: EH complete
> @@ -350,6 +341,20 @@ sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 0
> sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
> sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 >
> sd 0:0:0:0: [sda] Attached SCSI disk
> +ata_piix 0000:00:1f.1: version 2.12
> +ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 16 (level, low) -> IRQ 16
> +PCI: Setting latency timer of device 0000:00:1f.1 to 64
> +scsi4 : ata_piix
> +scsi5 : ata_piix
> +ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x60a0 irq 14
> +ata6: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x60a8 irq 15
> +ata5.00: ATAPI: MATSHITADVD-RAM UJ-840S, 1.11, max MWDMA2
> +ata5.00: configured for MWDMA2
> +ata6: port disabled. ignoring.
> +scsi 4:0:0:0: CD-ROM MATSHITA DVD-RAM UJ-840S 1.11 PQ: 0 ANSI: 5
> +sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
> +Uniform CD-ROM driver Revision: 3.20
> +sr 4:0:0:0: Attached scsi CD-ROM sr0
> PNP: PS/2 Controller [PNP0303:C217,PNP0f13:C218] at 0x60,0x64 irq 1,12
> i8042.c: Detected active multiplexing controller, rev 1.1.
> serio: i8042 KBD port at 0x60,0x64 irq 1
>
