Hi Jiang,
I tested this pachset.
(to be honest, as I used Bjorn tree, I changed a little of Patch6/6
to apply to his tree.)
My machine failed to boot after applied your patchset.
The reason is:
My machine's MCFG table shows that End bus number is 0x13.
[000h 0000 4] Signature : "MCFG" /* Memory Mapped Configuration table */
[004h 0004 4] Table Length : 00000040
[008h 0008 1] Revision : 01
[009h 0009 1] Checksum : 3E
[00Ah 0010 6] Oem ID : "PTLTD "
[010h 0016 8] Oem Table ID : " MCFG "
[018h 0024 4] Oem Revision : 06040001
[01Ch 0028 4] Asl Compiler ID : " LTP"
[020h 0032 4] Asl Compiler Revision : 00000000
[024h 0036 8] Reserved : 0000000000000000
[02Ch 0044 8] Base Address : 00000000F0000000
[034h 0052 2] Segment Group Number : 0000
[036h 0054 1] Start Bus Number : 00
[037h 0055 1] End Bus Number : 13
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[038h 0056 4] Reserved : 00000000
But CRS shows bus range is 0x00 - 0xff. So arch_acpi_pci_root_add() failed
because pci_mmconfig_insert() returns not -EEXIST but -EINVAL.
[ 0.094236] PCI: MMCONFIG for domain 0000 [bus 00-ff] conflicts with domain 0000 [bus 00-13]
int __devinit pci_mmconfig_insert(int segment, int start, int end, u64 addr)
{
..
(snip)
...
mutex_lock(&pci_mmcfg_lock);
cfg = pci_mmconfig_lookup(segment, start);
if (cfg) {
if (cfg->start_bus <= start && cfg->end_bus >= end) {
rc = -EEXIST;
} else {
printk(KERN_WARNING PREFIX
"MMCONFIG for domain %04x [bus %02x-%02x] "
"conflicts with domain %04x [bus %02x-%02x]\n",
segment, start, end,
cfg->segment, cfg->start_bus, cfg->end_bus);
}
goto out;
My impression is my machine's firmware is broken.
Howerver my machine boots well without your patchset. So I report as a problem.
Best regards,
Taku Izumi <izumi.taku@xxxxxxxxxxxxxx>
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