From: Prakhar Srivastava <prsriva@linux.microsoft.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-integrity@vger.kernel.org, kexec@lists.infradead.org
Cc: mark.rutland@arm.com, jean-philippe@linaro.org, arnd@arndb.de,
takahiro.akashi@linaro.org, sboyd@kernel.org,
catalin.marinas@arm.com, zohar@linux.ibm.com,
yamada.masahiro@socionext.com, kristina.martsenko@arm.org,
duwe@lst.de, bauerman@linux.ibm.com, james.morse@arm.org,
tglx@linutronix.de, allison@lohutok.net
Subject: [PATCH V4 0/2] Add support for arm64 to carry ima measurement
Date: Thu, 10 Oct 2019 17:35:58 -0700 [thread overview]
Message-ID: <20191011003600.22090-1-prsriva@linux.microsoft.com> (raw)
Add support to carry ima measurement log
to the next kexec'ed session triggered via kexec_file_load.
- Top of Linux 5.3-rc6
Currently during kexec the kernel file signatures are/can be validated
prior to actual load, the information(PE/ima signature) is not carried
to the next session. This lead to loss of information.
Carrying forward the ima measurement log to the next kexec'ed session
allows a verifying party to get the entire runtime event log since the
last full reboot, since that is when PCRs were last reset.
Tested for arm64 qemu and real hardware.
I have not been unable to test the patch for powerpc 64bit. Any testing
is greatly appretiated.
TODO: Add support for 32 bit in the of_ima.c
v4:
- Fix issue with HAVE_* config wrongly used.
v3:
- Fix build breaks due to bad config.
v2:
- move common code to drivers/of/of_ima.c.
- point arm64 to use of_ima implementation.
- point powerpc to use of_ima implementation
v1:
- add new fdt porperties to mark start and end for ima measurement
log.
- use fdt_* functions to add/remove fdt properties and memory
allocations.
- remove additional check for endian-ness as they are checked
in fdt_* functions.
v0:
- Add support to carry ima measurement log in arm64,
uses same code as powerpc.
Prakhar Srivastava (2):
Add support for arm64 to carry ima measurement log in kexec_file_load
update powerpc implementation to call into of_ima*
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/ima.h | 24 +++
arch/arm64/include/asm/kexec.h | 5 +
arch/arm64/kernel/Makefile | 1 +
arch/arm64/kernel/ima_kexec.c | 78 ++++++++++
arch/arm64/kernel/machine_kexec_file.c | 6 +
arch/powerpc/include/asm/ima.h | 5 -
arch/powerpc/kernel/Makefile | 3 -
arch/powerpc/kernel/ima_kexec.c | 170 ++-------------------
drivers/of/Kconfig | 6 +
drivers/of/Makefile | 1 +
drivers/of/of_ima.c | 204 +++++++++++++++++++++++++
include/linux/of.h | 31 ++++
13 files changed, 371 insertions(+), 164 deletions(-)
create mode 100644 arch/arm64/include/asm/ima.h
create mode 100644 arch/arm64/kernel/ima_kexec.c
create mode 100644 drivers/of/of_ima.c
--
2.17.1
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next reply other threads:[~2019-10-11 0:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-11 0:35 Prakhar Srivastava [this message]
2019-10-11 0:35 ` [PATCH V4 1/2] Add support for arm64 to carry ima measurement log in kexec_file_load Prakhar Srivastava
2019-10-11 0:36 ` [PATCH V4 2/2] update powerpc implementation to call into of_ima* Prakhar Srivastava
2019-10-14 18:02 ` [PATCH V4 0/2] Add support for arm64 to carry ima measurement James Morse
2019-10-15 1:31 ` prsriva
2019-10-15 17:39 ` James Morse
2019-10-15 18:47 ` Pavel Tatashin
2019-10-21 17:38 ` prsriva
2019-10-25 17:08 ` James Morse
2019-10-15 22:15 ` James Morris
2019-10-16 1:44 ` Mimi Zohar
2019-10-25 17:07 ` James Morse
2019-10-25 17:39 ` Mimi Zohar
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