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kbuild: support 'make modules_sign' with CONFIG_MODULE_SIG_ALL=n

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Commit d890f510c8 ("MODSIGN: Add modules_sign make target") introduced
'make modules_sign' to manually sign modules.

Some time later, commit d9d8d7ed49 ("MODSIGN: Add option to not sign
modules during modules_install") introduced CONFIG_MODULE_SIG_ALL.
If it was disabled, mod_sign_cmd was set to no-op ('true' command).
It affected not only 'make modules_install' but also 'make modules_sign'.
With CONFIG_MODULE_SIG_ALL=n, neither modules_install nor modules_sign
is able to sign modules.

Kbuild has kept that behavior, and nobody has complained about it, but
I think it is weird.

CONFIG_MODULE_SIG_ALL=n should turn off signing only for modules_install.
If users want to sign modules manually, modules_sign should be offered.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
This commit is contained in:
Masahiro Yamada 2023-08-23 20:50:47 +09:00
parent 5e02797b8e
commit 02e8487bbf
1 changed files with 5 additions and 4 deletions
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9
scripts/Makefile.modinst
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@ -95,7 +95,6 @@ endif
# Signing
# Don't stop modules_install even if we can't sign external modules.
#
ifeq ($(CONFIG_MODULE_SIG_ALL),y)
ifeq ($(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY)),)
sig-key := $(if $(wildcard $(CONFIG_MODULE_SIG_KEY)),,$(srctree)/)$(CONFIG_MODULE_SIG_KEY)
else
@ -104,13 +103,15 @@ endif
quiet_cmd_sign = SIGN $@
cmd_sign = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) "$(sig-key)" certs/signing_key.x509 $@ \
$(if $(KBUILD_EXTMOD),|| true)
else
ifeq ($(modules_sign_only),)
# During modules_install, modules are signed only when CONFIG_MODULE_SIG_ALL=y.
ifndef CONFIG_MODULE_SIG_ALL
quiet_cmd_sign :=
cmd_sign := :
endif
ifeq ($(modules_sign_only),)
# Create necessary directories
$(shell mkdir -p $(sort $(dir $(install-y))))