Re: [PATCH v4 6/8] roms: add microvm-bios (qboot) as binary and git submodule

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Philippe Mathieu-Daudé <philmd@xxxxxxxxxx> writes:

> On 9/24/19 2:44 PM, Sergio Lopez wrote:
>> qboot is a minimalist x86 firmware for booting Linux kernels. It does
>> the mininum amount of work required for the task, and it's able to
>> boot both PVH images and bzImages without relying on option roms.
>> 
>> This characteristics make it an ideal companion for the microvm
>> machine type.
>> 
>> Signed-off-by: Sergio Lopez <slp@xxxxxxxxxx>
>> ---
>>  .gitmodules              |   3 +++
>>  pc-bios/bios-microvm.bin | Bin 0 -> 65536 bytes
>>  roms/Makefile            |   6 ++++++
>>  roms/qboot               |   1 +
>>  4 files changed, 10 insertions(+)
>>  create mode 100755 pc-bios/bios-microvm.bin
>>  create mode 160000 roms/qboot
>> 
>> diff --git a/.gitmodules b/.gitmodules
>> index c5c474169d..19792c9a11 100644
>> --- a/.gitmodules
>> +++ b/.gitmodules
>> @@ -58,3 +58,6 @@
>>  [submodule "roms/opensbi"]
>>  	path = roms/opensbi
>>  	url = 	https://git.qemu.org/git/opensbi.git
>> +[submodule "roms/qboot"]
>> +	path = roms/qboot
>> +	url = https://github.com/bonzini/qboot
>> diff --git a/pc-bios/bios-microvm.bin b/pc-bios/bios-microvm.bin
>> new file mode 100755
>> index 0000000000000000000000000000000000000000..45eabc516692e2d134bbb630d133c7c2dcc9a9b6
>> GIT binary patch
>> literal 65536
>> zcmeI2eS8zwneS)hF_vth5y2#;brv;O^x_6mtAUMO%tn5}IEf)jY``G|XbMBqa_^-@
>> zBBUXSyplo3+VMx9Ci}VFwz~@rx!t?By&v!0UdNb=V<BQ0NE-8!l)yH1LPAE!VDnNi
>> zCSmUHnUQRVmuC0>GyaU`%sJ0_&U3!!Ij`fT?33lo8bTirhX$S6(dmK^Nu2qLAPZJO
>> zd+n=&@XLYwWFdS~Zh2c2gidFUEU<VyB{hF24C^}E=jl<HQ(<+MP>-}gkOUzx)FqJ6
>> z;W433mmmmAY+Noh;tibd?18@VxCH}v4GeX<kXL!tiyU!Hnn`6SuU6r$bB&SE_=SXJ
>> zc+)=1$Iq|sgvbt9s)=?%V2RL(E{A7Ar52#~B&%`TJKuimt+%dx%KD*M-I%M^1gEP~
>
> Now that using Docker is quite simple, I'd rather add a job building
> this and commit the built binary, so we have reproducible builds.

I'm not sure how can we achieve this. Are we already doing it for some
other binary? Could you please point me to an example?

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>> z{T7T+S*lAX?qTHrt4#h(KmH*)k<pQB3Tm?5L7?(9lEVrtl##zhc`nNjZ&4mP3bB|4
>> zb~VU9ajdF9Tpi-F3}->kmx-I7DQCL{eAeWfovymzF*9JY+zQzy<R@O^oR*AnB7Hj`
>> z6M+ncNygCkSVmt}0STiw!#*Ux1=%oUzd2F1AtPHeUbYwMBN@G$aI8XlZ{ktw2v+8-
>> z$;sC3#yOz|*~sTEX}W#|x&+khCLNV<jo;qf{T4Zjvfa<nu@>2HS5DRs+s~MszfA78
>> zkjwfj`3d>!F2qe9>x)&iRW`00>oga!RHyKuu0Kr@x8h=1al=Suj!BIWZ%4ilh{dh)
>> zegDScy}BSr7H^ECu565%yYTd$({(!DG27i3zcF8gB${z<R|oQSs>2%O{UNQgZe>fg
>> z!<Tc;atmj#E^r~sO5CrU*Y!v6r2HZHu+xHxCez1Be-QWWY@jipWCo#QAj2cmKViS+
>> z>3qy_x650R$s4<<>(#fn-?h&F-EXcd`&Ow?x<#O{|2t1_ST|?GfBVkbbw3gwZ>Vwk
>> z8XtE-7r!_GPJk2O1ULasfD_;ZH~~(86W|0m0ZxDu-~>1UPJk2O1ULasfD_;ZH~~(8
>> z6W|0m0ZxDu-~>1UPJk2O1ULasfD_;ZH~~(86W|0m0ZxDu-~>1UPJk2O1ULasfD_;Z
>> zH~~(86W|0m0ZxDu-~>1UPJk2O1ULasfD_;ZH~~(86W|0m0ZxDu-~>1UPJk2O1ULas
>> zfD_;ZH~~(86W|0m0ZxDu-~>1UPJk2O1ULasfD_;ZH~~(86W|0m0ZxDu-~>1UPJk2O
>> z1ULasfD_;ZH~~(86W|0m0ZxDu-~>1UPJk2O1ULasfD_;ZH~~(86W|0m0ZxDu-~>1U
>> zPJk2O1ULasfD_;ZH~~(86W|0m0ZxDu-~>1UPJk2O1ULasfD_;ZH~~(86W|0m0ZxDu
>> z-~>1UPJk2O1ULasfD_;ZH~~(86W|0m0ZxDu-~>1UPJk2O1ULasfD_;ZH~~(86W|0m
>> z0Z!od1Ux-$$J=_^2HLc?{{JUzm0dl`OkLOi(JspO^xUV&;+-j7IrD2oSp}ujDU3^>
>> o5d@0NUb>FZ&)-2Do-dnE`R8)xT^9bc5QmajO4XIv_+RY*0|l%Fi~s-t
>> 
>> literal 0
>> HcmV?d00001
>> 
>> diff --git a/roms/Makefile b/roms/Makefile
>> index 775c963f9d..47eabc8633 100644
>> --- a/roms/Makefile
>> +++ b/roms/Makefile
>> @@ -67,6 +67,7 @@ default:
>>  	@echo "  opensbi32-virt     -- update OpenSBI for 32-bit virt machine"
>>  	@echo "  opensbi64-virt     -- update OpenSBI for 64-bit virt machine"
>>  	@echo "  opensbi64-sifive_u -- update OpenSBI for 64-bit sifive_u machine"
>> +	@echo "  bios-microvm       -- update bios-microvm.bin (qboot)"
>
> I'd go the other way around:
>
>         @echo "  qboot -- update qboot (BIOS used by microvm)"

I think it's better the other way. In all cases, "target" specifies the
binary that will be built, not the name of the project holding it
(the targets for SeaBIOS are bios.bin and vgabios.bin).

I also want to clarify that the name bios-microvm was suggested by
qboot's author (Paolo) ;-)

Thanks,
Sergio.

>>  	@echo "  clean              -- delete the files generated by the previous" \
>>  	                              "build targets"
>>  
>> @@ -185,6 +186,10 @@ opensbi64-sifive_u:
>>  		PLATFORM="qemu/sifive_u"
>>  	cp opensbi/build/platform/qemu/sifive_u/firmware/fw_jump.bin ../pc-bios/opensbi-riscv64-sifive_u-fw_jump.bin
>>  
>> +bios-microvm:
>
>    qboot:
>
> or
>
>    qboot bios-microvm:
>
>> +	$(MAKE) -C qboot
>> +	cp qboot/bios.bin ../pc-bios/bios-microvm.bin
>> +
>>  clean:
>>  	rm -rf seabios/.config seabios/out seabios/builds
>>  	$(MAKE) -C sgabios clean
>> @@ -197,3 +202,4 @@ clean:
>>  	$(MAKE) -C skiboot clean
>>  	$(MAKE) -f Makefile.edk2 clean
>>  	$(MAKE) -C opensbi clean
>> +	$(MAKE) -C qboot clean
>> diff --git a/roms/qboot b/roms/qboot
>> new file mode 160000
>> index 0000000000..cb1c49e0cf
>> --- /dev/null
>> +++ b/roms/qboot
>> @@ -0,0 +1 @@
>> +Subproject commit cb1c49e0cfac99b9961d136ac0194da62c28cf64
>> 

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