Re: HVM firmware passthrough - helper library

[Ross Philipson <ross.philipson@citrix.com>]

On 03/27/2013 12:50 AM, Art Napor wrote:
> Works great with the updated libxl commits - thanks.
>
>  > ./biospt 6
>  > Make SMBIOS file from FW.
>  > Fail(1), errno: 2
>
> Looks like this does require the sysfs-dmi kmod to expose the dmi
> structure for the utility to write out the smbios_fw.bin.
>
> # ./biospt 6
> Make SMBIOS file from FW.
> Make SMBIOS Xen vendor struct.
> Wrote SMBIOS structures file: smbios_fw.bin count: 8
> Make ACPI SLIC file from FW.
> Fail(3), errno: 2
>
> Do the ACPI tables require the same exposure via sysfs? Not sure if this
> changes from 2.6 to 3.x kernels. The biospt utility can dump the ACPI
> tables using the MMAP option, but not via sysfs on a 3.4.32 system.

They are in the same place on my wheezy with 3.2.x kernel. I would be 
pretty surprised if they moved. Can you go in to 
/sys/firmware/acpi/tables and see what's there? Maybe try a hexdump -C < 
SLIC ...

>
>
> Thanks,
> Art
>
>
> ------------------------------------------------------------------------
> *From:* Ross Philipson <ross.philipson@citrix.com>
> *To:* Art Napor <artnapor@yahoo.com>; "xen-devel@lists.xensource.com"
> <xen-devel@lists.xensource.com>
> *Sent:* Sunday, March 24, 2013 5:10 PM
> *Subject:* Re: HVM firmware passthrough - helper library
>
> On 03/21/2013 03:42 PM, Art Napor wrote:
>  > Ross,
>  >
>  > I rebuilt Xen 4.2.1 with the V5 patch series and the updated helper
>  > library. The biospt utility built cleanly and runs on Dom0 with the
>  > aformentioned libraries in place. However, I'm not seeing the SMBIOS
>  > strings passed through to the DomU (A Centos 5 VM). Options 1 and 3
>  > using the biostpt utility appear to dump the SMBIOS and ACPI tables, but
>  > I'm not sure how to pass the tables in to the VM?
>
> Look at the related commits to libxl. After the firmware chunks are
> given to libxc to load into the new domain, the addresses are returned
> to libxl which writes them to xenstore.
>
>  >
>  > [root@localhost biospt]# ./biospt
>  > Usage:
>  > $ biospt <n>
>  > 1 - Write some SMBIOS tables using MMAP
>  > 2 - Write some SMBIOS tables using SYSFS
>  > 3 - Write some ACPI tables using MMAP
>  > 4 - Write some ACPI using SYSFS
>  > 5 - Read and trace DMI files
>  > 6 - Write out some test files
>  >
>  > ./biospt 6
>  > Make SMBIOS file from FW.
>  > Fail(1), errno: 2
>
> This is a rather rough test app for using the library. You should look
> closely at the code in it and figure out what it is doing. It does not
> have very robust error handling etc.
>
> Thanks
> Ross
>
>  >
>  >
>  > -
>  > Art
>  >
>  > ------------------------------------------------------------------------
>  > *From:* Ross Philipson <ross.philipson@citrix.com
> <mailto:ross.philipson@citrix.com>>
>  > *To:* xen-devel@lists.xensource.com
> <mailto:xen-devel@lists.xensource.com>
>  > *Cc:* Art Napor <artnapor@yahoo.com <mailto:artnapor@yahoo.com>>
>  > *Sent:* Wednesday, March 20, 2013 4:08 PM
>  > *Subject:* Re: HVM firmware passthrough - helper library
>  >
>  >
>  > > Ross,
>  > >
>  > > Finally got back to this project to test out the helper lib using
> the v3
>  > > hvm-firmware passthrough patches with Xen 4.2.1. When building from
>  > > tools/firmware the build failed with the following output:
>  > >
>  > > make
>  > > gcc -Wl,-soname -Wl,libxenhvm.so.1.0 -shared -o libxenhvm.so.1.0.0
>  > > xenhvm.opic smbios_module.opic acpi_module.opic xh_internal.opic
>  > >
>  >
> /home/ajn131/rpmbuild/SOURCES/xen-4.2.1/tools/firmware/libhvm/../../../tools/xenstore/libxenstore.so
>  > >
>  > > xenhvm.opic: could not read symbols: File in wrong format
>  > > collect2: ld returned 1 exit status
>  > > make: *** [libxenhvm.so.1.0.0] Error 1
>  > >
>  > > I was hoping to integrate the build into the RPM. Any thoughts?
> Should I
>  > > try it with the latest 4.3?
>  > >
>  > >
>  > > Thanks Again,
>  > >
>  > > -
>  > > Art
>  >
>  > Art,
>  >
>  > Can you try the attached tarball. A colleague found and fixed a couple
>  > of issues in my sample including the face that it was including in the
>  > wrong Rules.mk.
>  >
>  > Thanks
>  > Ross
>  >
>  > >
> ------------------------------------------------------------------------
>  > > *From:* Ross Philipson <Ross.Philipson@citrix.com
> <mailto:Ross.Philipson@citrix.com>
>  > <mailto:Ross.Philipson@citrix.com <mailto:Ross.Philipson@citrix.com>>>
>  > > *To:* "xen-devel@lists.xensource.com
> <mailto:xen-devel@lists.xensource.com>
>  > <mailto:xen-devel@lists.xensource.com
> <mailto:xen-devel@lists.xensource.com>>" <xen-devel@lists.xensource.com
> <mailto:xen-devel@lists.xensource.com>
>  > <mailto:xen-devel@lists.xensource.com
> <mailto:xen-devel@lists.xensource.com>>>
>  > > *Cc:* "Art Napor (artnapor@yahoo.com <mailto:artnapor@yahoo.com>
> <mailto:artnapor@yahoo.com <mailto:artnapor@yahoo.com>>)"
>  > <artnapor@yahoo.com <mailto:artnapor@yahoo.com>
> <mailto:artnapor@yahoo.com <mailto:artnapor@yahoo.com>>>
>  > > *Sent:* Tuesday, January 8, 2013 5:04 PM
>  > > *Subject:* HVM firmware passthrough - helper library
>  > >
>  > > Attached is a tarball with a helper library for reading host ACPI and
>  > > SMBIOS firmware and creating firmware files that can be used with the
>  > > HVM firmware passthrough patches I submitted. I used it in my
> testing of
>  > > the patches and planned to use it later when we moved to a new Xen
>  > > version. This library was requested by a few people - I hope you
> find it
>  > > useful.
>  > >
>  > > Ross Philipson
>  > > Senior Software Engineer
>  > > Citrix Systems, Inc
>  > > 14 Crosby Drive
>  > > Bedford, MA 01730
>  > > 781-301-7949
>  > > ross.philipson@citrix.com <mailto:ross.philipson@citrix.com>
> <mailto:ross.philipson@citrix.com <mailto:ross.philipson@citrix.com>>
>  > <mailto:ross.philipson@citrix.com <mailto:ross.philipson@citrix.com>
> <mailto:ross.philipson@citrix.com <mailto:ross.philipson@citrix.com>>>
>  > >
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