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 10:24:14 -0800 |
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On 1/12/21 10:05 AM, Mimi Zohar wrote: > On Tue, 2021-01-12 at 08:42 -0600, 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. >> >> I would like to also resolve the vmalloc vs. kmalloc difference for >> allocating the FDT. Then we can further consolidate the DT kexec code. >> >> It all needs some acks from arm64 and powerpc maintainers. As far as >> merging, I think via the integrity tree makes the most sense. > > Thanks, Rob. Lakshmi, please update Rob's patches to include patch > descriptions before re-posting. >
Will do Mimi.
thanks, -lakshmi
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