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Message-Id: <20220625223438.835408-2-masahiroy@kernel.org>
Date: Sun, 26 Jun 2022 07:34:37 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
linux-riscv@...ts.infradead.org
Cc: Masahiro Yamada <masahiroy@...nel.org>,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] riscv/purgatory: Omit use of bin2c
The .incbin assembler directive is much faster than bin2c + $(CC).
Do similar refactoring as in commit 4c0f032d4963 ("s390/purgatory:
Omit use of bin2c").
Please note the .quad directive matches to size_t in C (both 8 byte)
because the purgatory is compiled only for the 64-bit kernel.
(KEXEC_FILE depends on 64BIT).
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---
arch/riscv/Kconfig | 1 -
arch/riscv/purgatory/.gitignore | 1 -
arch/riscv/purgatory/Makefile | 8 +-------
arch/riscv/purgatory/kexec-purgatory.S | 14 ++++++++++++++
scripts/remove-stale-files | 2 ++
5 files changed, 17 insertions(+), 9 deletions(-)
create mode 100644 arch/riscv/purgatory/kexec-purgatory.S
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 32ffef9f6e5b..218c2f12b3ef 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -447,7 +447,6 @@ config KEXEC_FILE
config ARCH_HAS_KEXEC_PURGATORY
def_bool KEXEC_FILE
- select BUILD_BIN2C
depends on CRYPTO=y
depends on CRYPTO_SHA256=y
diff --git a/arch/riscv/purgatory/.gitignore b/arch/riscv/purgatory/.gitignore
index 38d7d1bda4d7..6e4dfb024ad2 100644
--- a/arch/riscv/purgatory/.gitignore
+++ b/arch/riscv/purgatory/.gitignore
@@ -1,4 +1,3 @@
# SPDX-License-Identifier: GPL-2.0-only
purgatory.chk
purgatory.ro
-kexec-purgatory.c
diff --git a/arch/riscv/purgatory/Makefile b/arch/riscv/purgatory/Makefile
index c2d14e2f345d..dd58e1d99397 100644
--- a/arch/riscv/purgatory/Makefile
+++ b/arch/riscv/purgatory/Makefile
@@ -84,12 +84,6 @@ $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE
$(call if_changed,ld)
-targets += kexec-purgatory.c
-
-quiet_cmd_bin2c = BIN2C $@
- cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
-
-$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro $(obj)/purgatory.chk FORCE
- $(call if_changed,bin2c)
+$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro $(obj)/purgatory.chk
obj-y += kexec-purgatory.o
diff --git a/arch/riscv/purgatory/kexec-purgatory.S b/arch/riscv/purgatory/kexec-purgatory.S
new file mode 100644
index 000000000000..0e9188815718
--- /dev/null
+++ b/arch/riscv/purgatory/kexec-purgatory.S
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+ .section .rodata, "a"
+
+ .align 8
+kexec_purgatory:
+ .globl kexec_purgatory
+ .incbin "arch/riscv/purgatory/purgatory.ro"
+.Lkexec_purgatroy_end:
+
+ .align 8
+kexec_purgatory_size:
+ .globl kexec_purgatory_size
+ .quad .Lkexec_purgatroy_end - kexec_purgatory
diff --git a/scripts/remove-stale-files b/scripts/remove-stale-files
index 7adab4618035..d75a52199a38 100755
--- a/scripts/remove-stale-files
+++ b/scripts/remove-stale-files
@@ -40,4 +40,6 @@ if [ -n "${building_out_of_srctree}" ]; then
done
fi
+rm -f arch/riscv/purgatory/kexec-purgatory.c
+
rm -f scripts/extract-cert
--
2.32.0
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