-----Original Message----- From: Bjorn Helgaas [mailto:bhelg...@google.com] Sent: Monday, November 26, 2012 8:12 PM To: Justin Piszcz Cc: Bruno Prémont; supp...@supermicro.com; linux-kernel@vger.kernel.org; Dan Williams Subject: Re: Supermicro X9SRL-F - channel enumeration error & ACPI/firmware bug question
On Mon, Nov 26, 2012 at 6:00 PM, Justin Piszcz <jpis...@lucidpixels.com> wrote: > > > -----Original Message----- > From: Bjorn Helgaas [mailto:bhelg...@google.com] > Sent: Monday, November 26, 2012 8:00 PM > To: Bruno Prémont > Cc: Justin Piszcz; supp...@supermicro.com; linux-kernel@vger.kernel.org; Dan > Williams > Subject: Re: Supermicro X9SRL-F - channel enumeration error & ACPI/firmware > bug question > > [Try Dan's current email address; sorry Dan] > > On Mon, Nov 26, 2012 at 5:56 PM, Bjorn Helgaas <bhelg...@google.com> wrote: >> [+cc Dan] >> >> On Mon, Nov 26, 2012 at 2:42 PM, Bruno Prémont >> <bonb...@linux-vserver.org> wrote: >>> Hi Justin, >>> >>> On Sat, 24 November 2012 "Justin Piszcz" wrote: >>>> Is the following normal on an X9SRL-F board (bios 1.0a)? >>>> >>>> In the manual it states: >>>> >>>> Data Direct I/O >>>> Select Enabled to enable Intel I/OAT (I/O Acceleration Technology), > which >>>> significantly reduces CPU overhead by leveraging CPU architectural >>>> improvements and freeing the system resource for other tasks. The> > Here is the full dmesg: (I went back to my older kernel, let me know if you > need a dmesg w/ those options enabled) > http://home.comcast.net/~jpiszcz/20121126/dmesg.txt It looks like maybe you don't have CONFIG_PCI_MMCONFIG turned on? Hi, I have two supermicro boards I am trying this on, I tried this on another system I have (X8DTH-6F), with all of these options enabled, the system does not boot. It cannot talk to the SATA boot drive. " 5520 chips built in, the X8DTH-6/X8DTH-6F/X8DTH-i/X8DTH-iF offers ...... The Intel I/OAT (I/O Acceleration Technology) significantly reduces CPU over- head by ..." When the following options are enabled, the system does not boot: +CONFIG_HAVE_INTEL_TXT=y +CONFIG_IOMMU_API=y +CONFIG_IOMMU_SUPPORT=y +CONFIG_DMAR_TABLE=y +CONFIG_INTEL_IOMMU=y +CONFIG_INTEL_IOMMU_DEFAULT_ON=y +CONFIG_INTEL_IOMMU_FLOPPY_WA=y It fails like so: (Fails to talk to the SSD) http://home.comcast.net/~jpiszcz/20121127/photo1-resize.jpg (then, a few moments later: Kernel panic) http://home.comcast.net/~jpiszcz/20121127/photo2-resize.jpg With those options disabled, the system boots (and always has booted fine). Is there a certain combination of parameters that allows I/OAT to be enabled _and_ allow the system to boot? Justin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
