[Xen-devel] RE: Megaraid SAS driver failing in Xen-3.3.0 but was working in Xen-3.2.2-rc3

["Han, Weidong" <weidong.han@xxxxxxxxx>]

per this log, we can see the context mapping is not created for 02:0e.0.

 

I checked the code, I suspect context mapping() for PCI device is incorrect (see case DEV_TYPE_PCI block code in domain_context_mapping()). Obviously the PCI device is not mapped. Espen changed this code in c/s 17972. Espen, can you give some explanation?

 

Venkat, pls try attached patch. and pls post your "lspci -v" output.

 

Randy (Weidong)

---

From: Kumar, Venkat [mailto:Venkat.Kumar@xxxxxxx]
Sent: 2008年9月18日 12:45
To: Han, Weidong
Cc: Cui, Dexuan; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: Megaraid SAS driver failing in Xen-3.3.0 but was working in Xen-3.2.2-rc3

 

Hi Randy,

 

I am attaching the complete output in a file.

 

But for your reference, a part of it I am pasting in the body.

==================================================================================

(XEN) PCI add device 02:0e.0

(XEN) [VT-D]iommu.c:775: iommu_page_fault: iommu->reg = ffff828bfff55000

(XEN) [VT-D]iommu.c:744: iommu_fault_status: Fault Overflow

(XEN) [VT-D]iommu.c:729: iommu_fault:DMA Write: 2:e.0 addr cddf2000 REASON 2 iommu->reg = ffff828bfff55000

(XEN) print_vtd_entries: iommu = ffff8300cde0db00 bdf = 2:e:0 gmfn = cddf2

(XEN)     root_entry = ffff83012bfe5000

(XEN)     root_entry[2] = 12779e001

(XEN)     context = ffff83012779e000

(XEN)     context[70] = 0_0

(XEN)     ctxt_entry[70] not present

(XEN) PCI add device 00:1b.0

(XEN) PCI remove device 02:0e.0

==================================================================================

 

02:0e.0 is the pci id of Megaraid SAS controller.

For some reason you can see that the device is removed.

I guess this output would give you some idea.

 

 

Thx,

Venkat

---

From: Han, Weidong [mailto:weidong.han@xxxxxxxxx]
Sent: Thursday, September 18, 2008 8:01 AM
To: Kumar, Venkat; xen-devel@xxxxxxxxxxxxxxxxxxx
Cc: Cui, Dexuan
Subject: RE: Megaraid SAS driver failing in Xen-3.3.0 but was working in Xen-3.2.2-rc3

 

Venkat,

 

Can you post the serial console output?

 

Randy (Weidong)

 

---

From: Kumar, Venkat [mailto:Venkat.Kumar@xxxxxxx]
Sent: 2008年9月17日 20:38
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Cc: Han, Weidong; Cui, Dexuan
Subject: Megaraid SAS driver failing in Xen-3.3.0 but was working in Xen-3.2.2-rc3

On Xen-3.3.0, domain0 Megaraid SAS (SAS 1068 controller) driver is not loading correctly if vtd support in Xen is enabled.

It fails at the point of initializing firmware.

 

I wasn’t seeing this error with Xen-3.2.2-rc3 (Unstable version), though with vtd disabled in Xen-3.3.0, it is working.

 

Looks like a degrade problem.

 

Any clues?

Thx,

Venkat

 

nested.patch
Description: nested.patch

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