Re: Re : [Xen-devel] Re: Patches for VGA-Passthrough XEN 4.2 unstable

[David TECHER <davidtecher@xxxxxxxx>]

Well it is very simple :)

I will show your a example 

You have to replace the required ranges in for the 4 "ranges"

1 --------> pci 0000:08:00.0: reg 10 32bit mmio: [0xf8000000-0xf8ffffff]
2 --------> pci 0000:08:00.0: reg 14 64bit mmio pref:
[0xd0000000-0xdfffffff]
3 --------> pci 0000:08:00.0: reg 1c 64bit mmio: [0xf6000000-0xf7ffffff]
4 --------> pci 0000:08:00.0: reg 30 32bit mmio pref:
[0xf5f80000-0xf5ffffff] 

I will do it for the number 1

1) You will have replace the required values in
tools/firmware/hvmloader/acpi/dsdt.asl 
    Search for the words  "/* reserve MMIO BARs of gfx for 1:1 mapping */"
in the file
    and the first block AFTER  need to be    change like that 

         Here the reference is 

     "pci 0000:08:00.0: reg 10 32bit mmio: [0xf8000000-0xf8ffffff]"
---------------------------------------------------------------------
         "/* reserve MMIO BARs of gfx for 1:1 mapping */
                     DWordMemory(
                         ResourceProducer, PosDecode, MinFixed, MaxFixed,
                         Cacheable, ReadWrite,
                        0x00000000,
                        0xF8000000, // the min value in hexadecimal, I
modify it here
                        0xF8FFFFFF, // the max value in hexadecimal I midify
it here
                        0x00000000,
                        ???????????) // value = max - min + 1 in hexadecimal
value, I need to find it
---------------------------------------------------------------------------

You need to convert the min and the max and do the conversion

For hexadecimal/decimal conversions,  go to a site like
http://www.statman.info/conversions/hexadecimal.html for doing conversion

For min and max values, you will have (enter the value without "0x" on the
site I told you, feel the field "Convert", click on "to decimal")
Hex            Dec
F8000000    4160749568
F8FFFFFF    4177526783

So 4177526783 - 4160749568 +1 = 16777216
So 16777216 is 1000000 in hexadecimal

As a consequence for

 pci 0000:08:00.0: reg 10 32bit mmio: [0xf8000000-0xf8ffffff]

you will have
------------------------------------------------------------------------
    "/* reserve MMIO BARs of gfx for 1:1 mapping */
                     DWordMemory(
                         ResourceProducer, PosDecode, MinFixed, MaxFixed,
                         Cacheable, ReadWrite,
                        0x00000000,
                        0xF8000000, // the min value in hexadecimal
                        0xF8FFFFFF, // the max value in hexadecimal
                        0x00000000,
                        0x01000000) // value = max - min + 1 in hexadecimal
value
----------------------------------------------------------------------------

Do the same steps for 

2 --------> pci 0000:08:00.0: reg 14 64bit mmio pref:
[0xd0000000-0xdfffffff]
3 --------> pci 0000:08:00.0: reg 1c 64bit mmio: [0xf6000000-0xf7ffffff]
4 --------> pci 0000:08:00.0: reg 30 32bit mmio pref:
[0xf5f80000-0xf5ffffff] 

That's all!

Ensure to put you vgabios-pt.bin in the required place. 

Compil and install.

My graphic card GT 440 works like a charm with nvidia 275.33. I've tried you
280.26 nvidia drivers but without any success. This driver version requires
more ressoures. 

The GPLPV drivers for HVM works well too!









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