Messages in this thread | | | Subject | Re: [PATCH v14 0/6] Carry forward IMA measurement log on kexec on ARM64 | From | Lakshmi Ramasubramanian <> | Date | Tue, 12 Jan 2021 10:23:01 -0800 |
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On 1/12/21 6:42 AM, Rob Herring wrote: > On Mon, Jan 04, 2021 at 11:25:56AM -0800, Lakshmi Ramasubramanian 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 a29a64445089 ("powerpc: Use common of_kexec_setup_new_fdt()") >> in https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git >> "dt/kexec" branch. > > This all looks good to me. I'd suggest you send the above patches out as > part of this series because I don't plan to do so.
Thanks for reviewing the patches Rob.
Sure - I'll add your patches to this series.
> I would like to also resolve the vmalloc vs. kmalloc difference for > allocating the FDT. Then we can further consolidate the DT kexec code.
I think FDT allocation using vmalloc for ARM64 can be changed to kmalloc. What are the other changes you'd like me to do in arm64/powerpc DT kexec code in this patch series?
@AKASHI Takahiro - could you please let me know if the above sounds right?
> > It all needs some acks from arm64 and powerpc maintainers. As far as > merging, I think via the integrity tree makes the most sense.
I'll create the patch series in "next-integrity" branch.
Thiago/Mimi have acked some of the patches. Please review the remaining patches in this version.
Could arm64 maintainers please review the patches and respond?
thanks, -lakshmi
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