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SubjectRe: [PATCH v19 00/13] Carry forward IMA measurement log on kexec on ARM64
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On 3/2/21 7:06 AM, Rob Herring wrote:
> On Sun, Feb 21, 2021 at 11:49 AM Lakshmi Ramasubramanian
> <nramas@linux.microsoft.com> wrote:
>>
>> On kexec file load Integrity Measurement Architecture (IMA) subsystem
>> may verify the IMA signature of the kernel and initramfs, and measure
>> it. The command line parameters passed to the kernel in the kexec call
>> may also be measured by IMA. A remote attestation service can verify
>> a TPM quote based on the TPM event log, the IMA measurement list, and
>> the TPM PCR data. This can be achieved only if the IMA measurement log
>> is carried over from the current kernel to the next kernel across
>> the kexec call.
>>
>> powerpc already supports carrying forward the IMA measurement log on
>> kexec. This patch set adds support for carrying forward the IMA
>> measurement log on kexec on ARM64.
>>
>> This patch set moves the platform independent code defined for powerpc
>> such that it can be reused for other platforms as well. A chosen node
>> "linux,ima-kexec-buffer" is added to the DTB for ARM64 to hold
>> the address and the size of the memory reserved to carry
>> the IMA measurement log.
>>
>> This patch set has been tested for ARM64 platform using QEMU.
>> I would like help from the community for testing this change on powerpc.
>> Thanks.
>>
>> This patch set is based on
>> commit f31e3386a4e9 ("ima: Free IMA measurement buffer after kexec syscall")
>> in https://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git
>> "ima-kexec-fixes" branch.

[...]

>>
>> Lakshmi Ramasubramanian (10):
>> kexec: Move ELF fields to struct kimage
>> arm64: Use ELF fields defined in 'struct kimage'
>> powerpc: Use ELF fields defined in 'struct kimage'
>> x86: Use ELF fields defined in 'struct kimage'
>> powerpc: Move ima buffer fields to struct kimage
>> powerpc: Enable passing IMA log to next kernel on kexec
>> powerpc: Move arch independent ima kexec functions to
>> drivers/of/kexec.c
>> kexec: Use fdt_appendprop_addrrange() to add ima buffer to FDT
>> powerpc: Delete unused function delete_fdt_mem_rsv()
>> arm64: Enable passing IMA log to next kernel on kexec
>>
>> Rob Herring (3):
>> of: Add a common kexec FDT setup function
>> arm64: Use common of_kexec_alloc_and_setup_fdt()
>> powerpc: Use common of_kexec_alloc_and_setup_fdt()
>>
>> arch/arm64/Kconfig | 1 +
>> arch/arm64/include/asm/kexec.h | 4 -
>> arch/arm64/kernel/machine_kexec_file.c | 194 +----------
>> arch/powerpc/Kconfig | 2 +-
>> arch/powerpc/include/asm/ima.h | 30 --
>> arch/powerpc/include/asm/kexec.h | 14 +-
>> arch/powerpc/kexec/Makefile | 7 -
>> arch/powerpc/kexec/elf_64.c | 30 +-
>> arch/powerpc/kexec/file_load.c | 183 +---------
>> arch/powerpc/kexec/file_load_64.c | 21 +-
>> arch/powerpc/kexec/ima.c | 219 ------------
>> arch/x86/include/asm/kexec.h | 5 -
>> arch/x86/kernel/crash.c | 14 +-
>> arch/x86/kernel/kexec-bzimage64.c | 2 +-
>> arch/x86/kernel/machine_kexec_64.c | 4 +-
>> drivers/of/Makefile | 6 +
>> drivers/of/kexec.c | 458 +++++++++++++++++++++++++
>> include/linux/kexec.h | 8 +
>> include/linux/of.h | 7 +
>> security/integrity/ima/ima.h | 4 -
>> security/integrity/ima/ima_kexec.c | 9 +-
>> 21 files changed, 539 insertions(+), 683 deletions(-)
>> delete mode 100644 arch/powerpc/include/asm/ima.h
>> delete mode 100644 arch/powerpc/kexec/ima.c
>> create mode 100644 drivers/of/kexec.c
>
> I fixed up the Fixes tags and applied for 5.13.
>

Thanks a lot Rob.

-lakshmi


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