debian/rules: Add build-ovmf-csv target to build OVMF.CSV.fd

===
Prerequisite:

See the `Prerequisite 1.` in the previous commit's message.

===
Build OVMF.CSV.fd:

Actually, the OVMF.CSV.fd mentioned here is the OVMF.fd mentioned in the
previous commit's message. In order build the OVMF.fd and save it, we
rename it to OVMF.CSV.fd.

When we build the OVMF.CSV.fd which support full-disk encryption, we
should delete stale grub.efi in the source tree:
  $ rm OvmfPkg/AmdSev/Grub/grub.efi
And specify build target:
  $ dpkg-buildpackage -us -uc -b -T build-ovmf-csv

After completion of the build process, the OVMF.CSV.fd will be saved to
debian/ovmf-install/OVMF.CSV.fd.

Signed-off-by: hanliyang <[email protected]>

debian/rules

@@ -70,10 +70,13 @@ debian/setup-build-stamp:
 OVMF_INSTALL_DIR = debian/ovmf-install
 OVMF64_BUILD_ROOT = Build/OvmfX64
 OVMF64_BUILD_DIR = $(OVMF64_BUILD_ROOT)/$(BUILD_TYPE)_$(EDK2_TOOLCHAIN)
+OVMF64_BUILD_ROOT_CSV = Build/AmdSev
+OVMF64_BUILD_DIR_CSV = $(OVMF64_BUILD_ROOT_CSV)/$(BUILD_TYPE)_$(EDK2_TOOLCHAIN)
 OVMF_ENROLL = $(OVMF_INSTALL_DIR)/EnrollDefaultKeys.efi
 OVMF_SHELL =  $(OVMF_INSTALL_DIR)/Shell.efi
 OVMF_BINARIES = $(OVMF_ENROLL) $(OVMF_SHELL)
 OVMF_IMAGES := $(addprefix $(OVMF_INSTALL_DIR)/,OVMF_CODE_4M.fd OVMF_CODE_4M.secboot.fd OVMF_VARS_4M.fd)
+OVMF_IMAGES_CSV := $(addprefix $(OVMF_INSTALL_DIR)/,OVMF.CSV.fd)
 OVMF_PREENROLLED_VARS := $(addprefix $(OVMF_INSTALL_DIR)/,OVMF_VARS_4M.ms.fd OVMF_VARS_4M.snakeoil.fd)
 
 OVMF32_INSTALL_DIR = debian/ovmf32-install
@@ -154,6 +157,17 @@ $(OVMF_BINARIES) $(OVMF_IMAGES): debian/setup-build-stamp
 	cp $(OVMF64_BUILD_DIR)/FV/OVMF_CODE.fd \
 		$(OVMF_INSTALL_DIR)/OVMF_CODE_4M.secboot.fd
 
+build-ovmf-csv: build-ovmf $(OVMF_IMAGES_CSV)
+$(OVMF_IMAGES_CSV): debian/setup-build-stamp
+	rm -f OvmfPkg/AmdSev/Grub/grub.efi
+	set -e; . ./edksetup.sh; \
+		build -a X64 \
+			-t $(EDK2_TOOLCHAIN) \
+			-p OvmfPkg/AmdSev/AmdSevX64.dsc \
+			$(OVMF_COMMON_FLAGS) -b $(BUILD_TYPE)
+	cp $(OVMF64_BUILD_DIR_CSV)/FV/OVMF.fd \
+		$(OVMF_INSTALL_DIR)/OVMF.CSV.fd
+
 ifeq ($(call dpkg_vendor_derives_from_v1,ubuntu),yes)
 debian/PkKek-1-vendor.pem: debian/PkKek-1-Ubuntu.pem
 else
@@ -321,4 +335,4 @@ get-orig-source:
 		edk2-$(DEB_VERSION_UPSTREAM)
 	rm -rf edk2.tmp edk2-$(DEB_VERSION_UPSTREAM)
 
-.PHONY: build-ovmf build-ovmf32 build-qemu-efi build-qemu-efi-aarch64 build-qemu-efi-arm build-qemu-efi-riscv64
+.PHONY: build-ovmf build-ovmf32 build-qemu-efi build-qemu-efi-aarch64 build-qemu-efi-arm build-qemu-efi-riscv64 build-ovmf-csv