The following commit has been merged into the x86/build branch of tip:
Commit-ID: 2d17bd24b0169d3fdbf003dfd55af600e9a30553
Gitweb: https://git.kernel.org/tip/2d17bd24b0169d3fdbf003dfd55af600e9a30553
Author: Masahiro Yamada <masahiroy@xxxxxxxxxx>
AuthorDate: Mon, 25 Jul 2022 11:08:12 +09:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Mon, 25 Jul 2022 10:32:32 +02:00
x86/purgatory: Omit use of bin2c
The .incbin assembler directive is much faster than bin2c + $(CC).
Do similar refactoring as in
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 X86_64).
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Link: https://lore.kernel.org/r/20220725020812.622255-2-masahiroy@xxxxxxxxxx
---
arch/x86/.gitignore | 2 --
arch/x86/Kconfig | 1 -
arch/x86/purgatory/Makefile | 8 +-------
arch/x86/purgatory/kexec-purgatory.S | 14 ++++++++++++++
scripts/remove-stale-files | 2 ++
5 files changed, 17 insertions(+), 10 deletions(-)
create mode 100644 arch/x86/purgatory/kexec-purgatory.S
diff --git a/arch/x86/.gitignore b/arch/x86/.gitignore
index 677111a..f2e1d6c 100644
--- a/arch/x86/.gitignore
+++ b/arch/x86/.gitignore
@@ -3,6 +3,4 @@ boot/compressed/vmlinux
tools/test_get_len
tools/insn_sanity
tools/insn_decoder_test
-purgatory/kexec-purgatory.c
purgatory/purgatory.ro
-
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 076adde..901cb59 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2032,7 +2032,6 @@ config KEXEC
config KEXEC_FILE
bool "kexec file based system call"
select KEXEC_CORE
- select BUILD_BIN2C
depends on X86_64
depends on CRYPTO=y
depends on CRYPTO_SHA256=y
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
index 248b009..31c634a 100644
--- a/arch/x86/purgatory/Makefile
+++ b/arch/x86/purgatory/Makefile
@@ -73,12 +73,6 @@ $(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 $(obj)/purgatory.chk
obj-y += kexec-purgatory.o
diff --git a/arch/x86/purgatory/kexec-purgatory.S b/arch/x86/purgatory/kexec-purgatory.S
new file mode 100644
index 0000000..8530fe9
--- /dev/null
+++ b/arch/x86/purgatory/kexec-purgatory.S
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+ .section .rodata, "a"
+
+ .align 8
+kexec_purgatory:
+ .globl kexec_purgatory
+ .incbin "arch/x86/purgatory/purgatory.ro"
+.Lkexec_purgatory_end:
+
+ .align 8
+kexec_purgatory_size:
+ .globl kexec_purgatory_size
+ .quad .Lkexec_purgatory_end - kexec_purgatory
diff --git a/scripts/remove-stale-files b/scripts/remove-stale-files
index 7adab46..379e86c 100755
--- a/scripts/remove-stale-files
+++ b/scripts/remove-stale-files
@@ -41,3 +41,5 @@ if [ -n "${building_out_of_srctree}" ]; then
fi
rm -f scripts/extract-cert
+
+rm -f arch/x86/purgatory/kexec-purgatory.c
|