Oops, Please ignore this patch.
By mistake I posted the wrong version. I am sorry for the confusion, I
will resend the right version.
Thanks & Regards,
- Nayna
On 3/6/20 12:39 PM, Nayna Jain wrote:
Every time a new architecture defines the IMA architecture specific
functions - arch_ima_get_secureboot() and arch_ima_get_policy(), the IMA
include file needs to be updated. To avoid this "noise", this patch
defines a new IMA Kconfig IMA_SECURE_AND_OR_TRUSTED_BOOT option, allowing
the different architectures to select it.
Suggested-by: Linus Torvalds <torva...@linux-foundation.org>
Signed-off-by: Nayna Jain <na...@linux.ibm.com>
Cc: Ard Biesheuvel <a...@kernel.org>
Cc: Philipp Rudo <pr...@linux.ibm.com>
Cc: Michael Ellerman <m...@ellerman.id.au>
---
v3:
* Updated and tested the patch with improvements suggested by Michael.
It now uses "imply" instead of "select". Thanks Michael.
* Have missed replacing the CONFIG_IMA in x86 and s390 with new config,
that was resulting in redefinition when the IMA_SECURE_AND_OR_TRUSTED_BOOT
is not enabled. Thanks to Mimi for recognizing the problem.
v2:
* Fixed the issue identified by Mimi. Thanks Mimi, Ard, Heiko and Michael for
discussing the fix.
arch/powerpc/Kconfig | 1 +
arch/s390/Kconfig | 1 +
arch/s390/kernel/Makefile | 2 +-
arch/x86/Kconfig | 1 +
arch/x86/kernel/Makefile | 2 +-
include/linux/ima.h | 3 +--
security/integrity/ima/Kconfig | 8 ++++++++
7 files changed, 14 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 497b7d0b2d7e..a5cfde432983 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -979,6 +979,7 @@ config PPC_SECURE_BOOT
bool
depends on PPC_POWERNV
depends on IMA_ARCH_POLICY
+ select IMA_SECURE_AND_OR_TRUSTED_BOOT
help
Systems with firmware secure boot enabled need to define security
policies to extend secure boot to the OS. This config allows a user
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8abe77536d9d..4a502fbcb800 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -195,6 +195,7 @@ config S390
select ARCH_HAS_FORCE_DMA_UNENCRYPTED
select SWIOTLB
select GENERIC_ALLOCATOR
+ select IMA_SECURE_AND_OR_TRUSTED_BOOT if IMA_ARCH_POLICY
config SCHED_OMIT_FRAME_POINTER
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 2b1203cf7be6..578a6fa82ea4 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -70,7 +70,7 @@ obj-$(CONFIG_JUMP_LABEL) += jump_label.o
obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o
obj-$(CONFIG_KEXEC_FILE) += kexec_elf.o
-obj-$(CONFIG_IMA) += ima_arch.o
+obj-$(CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT) += ima_arch.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_cpum_cf_common.o
obj-$(CONFIG_PERF_EVENTS) += perf_cpum_cf.o perf_cpum_sf.o
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index beea77046f9b..7f5bfaf0cbd2 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -230,6 +230,7 @@ config X86
select VIRT_TO_BUS
select X86_FEATURE_NAMES if PROC_FS
select PROC_PID_ARCH_STATUS if PROC_FS
+ select IMA_SECURE_AND_OR_TRUSTED_BOOT if EFI && IMA_ARCH_POLICY
config INSTRUCTION_DECODER
def_bool y
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 9b294c13809a..7f131ceba136 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -155,5 +155,5 @@ ifeq ($(CONFIG_X86_64),y)
endif
ifdef CONFIG_EFI
-obj-$(CONFIG_IMA) += ima_arch.o
+obj-$(CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT) += ima_arch.o
endif
diff --git a/include/linux/ima.h b/include/linux/ima.h
index 1659217e9b60..aefe758f4466 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -30,8 +30,7 @@ extern void ima_kexec_cmdline(const void *buf, int size);
extern void ima_add_kexec_buffer(struct kimage *image);
#endif
-#if (defined(CONFIG_X86) && defined(CONFIG_EFI)) || defined(CONFIG_S390) \
- || defined(CONFIG_PPC_SECURE_BOOT)
+#ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
extern bool arch_ima_get_secureboot(void);
extern const char * const *arch_get_ima_policy(void);
#else
diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index 3f3ee4e2eb0d..2baaf196c6d8 100644
--- a/security/integrity/ima/Kconfig
+++ b/security/integrity/ima/Kconfig
@@ -327,3 +327,11 @@ config IMA_QUEUE_EARLY_BOOT_KEYS
depends on IMA_MEASURE_ASYMMETRIC_KEYS
depends on SYSTEM_TRUSTED_KEYRING
default y
+
+config IMA_SECURE_AND_OR_TRUSTED_BOOT
+ bool
+ depends on IMA_ARCH_POLICY
+ default n
+ help
+ This option is selected by architectures to enable secure and/or
+ trusted boot based on IMA runtime policies.
