linux-kernel - [PATCH v5 6/8] arm64: efi: enable generic EFI compressed boot

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Date:   Sat, 10 Sep 2022 10:11:50 +0200
From:   Ard Biesheuvel <ardb@...nel.org>
To:     linux-efi@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Ard Biesheuvel <ardb@...nel.org>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Peter Jones <pjones@...hat.com>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Heinrich Schuchardt <heinrich.schuchardt@...onical.com>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Atish Patra <atishp@...shpatra.org>,
        Arnd Bergmann <arnd@...db.de>,
        Huacai Chen <chenhuacai@...ngson.cn>,
        Xi Ruoyao <xry111@...111.site>,
        Lennart Poettering <lennart@...ttering.net>,
        Jeremy Linton <jeremy.linton@....com>,
        Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>
Subject: [PATCH v5 6/8] arm64: efi: enable generic EFI compressed boot

Wire up the generic EFI zboot support for arm64.

Signed-off-by: Ard Biesheuvel <ardb@...nel.org>
---
 arch/arm64/Makefile        | 9 +++++++--
 arch/arm64/boot/.gitignore | 1 +
 arch/arm64/boot/Makefile   | 6 ++++++
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 6d9d4a58b898..a82bb3599094 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -151,12 +151,17 @@ libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
 
 # Default target when executing plain make
 boot		:= arch/arm64/boot
+
+ifeq ($(CONFIG_EFI_ZBOOT),)
 KBUILD_IMAGE	:= $(boot)/Image.gz
+else
+KBUILD_IMAGE	:= $(boot)/vmlinuz.efi
+endif
 
-all:	Image.gz
+all:	$(notdir $(KBUILD_IMAGE))
 
 
-Image: vmlinux
+Image vmlinuz.efi: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
 Image.%: Image
diff --git a/arch/arm64/boot/.gitignore b/arch/arm64/boot/.gitignore
index 9a7a9009d43a..af5dc61f8b43 100644
--- a/arch/arm64/boot/.gitignore
+++ b/arch/arm64/boot/.gitignore
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
 Image
 Image.gz
+vmlinuz*
diff --git a/arch/arm64/boot/Makefile b/arch/arm64/boot/Makefile
index a0e3dedd2883..c65aee088410 100644
--- a/arch/arm64/boot/Makefile
+++ b/arch/arm64/boot/Makefile
@@ -38,3 +38,9 @@ $(obj)/Image.lzo: $(obj)/Image FORCE
 
 $(obj)/Image.zst: $(obj)/Image FORCE
 	$(call if_changed,zstd)
+
+EFI_ZBOOT_PAYLOAD	:= Image
+EFI_ZBOOT_BFD_TARGET	:= elf64-littleaarch64
+EFI_ZBOOT_MACH_TYPE	:= ARM64
+
+include $(srctree)/drivers/firmware/efi/libstub/Makefile.zboot
-- 
2.35.1