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

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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
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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)"
 	@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:
+	$(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
-- 
2.21.0




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