From: Mimi Zohar <zohar@linux.ibm.com>
To: Rob Herring <robh@kernel.org>,
Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Cc: bauerman@linux.ibm.com, takahiro.akashi@linaro.org,
gregkh@linuxfoundation.org, will@kernel.org,
catalin.marinas@arm.com, mpe@ellerman.id.au, james.morse@arm.com,
sashal@kernel.org, benh@kernel.crashing.org, paulus@samba.org,
frowand.list@gmail.com, vincenzo.frascino@arm.com,
mark.rutland@arm.com, dmitry.kasatkin@gmail.com,
jmorris@namei.org, serge@hallyn.com, pasha.tatashin@soleen.com,
allison@lohutok.net, masahiroy@kernel.org, bhsharma@redhat.com,
mbrugger@suse.com, hsinyi@chromium.org, tao.li@vivo.com,
christophe.leroy@c-s.fr, prsriva@linux.microsoft.com,
balajib@linux.microsoft.com, linux-integrity@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linuxppc-dev@vger.kernel.org
Subject: Re: [PATCH v14 0/6] Carry forward IMA measurement log on kexec on ARM64
Date: Tue, 12 Jan 2021 13:05:46 -0500 [thread overview]
Message-ID: <601825013d67584b0d2de7a973b806ec3cbc05ca.camel@linux.ibm.com> (raw)
In-Reply-To: <20210112144248.GA256955@robh.at.kernel.org>
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.
Mimi
next prev parent reply other threads:[~2021-01-12 18:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-04 19:25 Lakshmi Ramasubramanian
2021-01-04 19:25 ` [PATCH v14 1/6] ima: Move arch_ima_add_kexec_buffer() to ima Lakshmi Ramasubramanian
2021-01-04 19:25 ` [PATCH v14 2/6] powerpc: Move arch independent ima kexec functions to drivers/of/kexec.c Lakshmi Ramasubramanian
2021-01-13 2:14 ` Thiago Jung Bauermann
2021-01-04 19:25 ` [PATCH v14 3/6] kexec: Use fdt_appendprop_addrrange() to add ima buffer to FDT Lakshmi Ramasubramanian
2021-01-04 19:26 ` [PATCH v14 4/6] powerpc: Delete unused functions Lakshmi Ramasubramanian
2021-01-12 23:30 ` Mimi Zohar
2021-01-12 23:57 ` Lakshmi Ramasubramanian
2021-01-13 2:15 ` Thiago Jung Bauermann
2021-01-04 19:26 ` [PATCH v14 5/6] arm64: Free DTB buffer if fdt_open_into() fails Lakshmi Ramasubramanian
2021-01-04 19:26 ` [PATCH v14 6/6] arm64: Add IMA log information in kimage used for kexec Lakshmi Ramasubramanian
2021-01-12 23:28 ` Mimi Zohar
2021-01-12 23:54 ` Lakshmi Ramasubramanian
2021-01-13 2:16 ` Thiago Jung Bauermann
2021-01-12 14:42 ` [PATCH v14 0/6] Carry forward IMA measurement log on kexec on ARM64 Rob Herring
2021-01-12 18:05 ` Mimi Zohar [this message]
2021-01-12 18:24 ` Lakshmi Ramasubramanian
2021-01-12 18:45 ` Thiago Jung Bauermann
2021-01-12 18:23 ` Lakshmi Ramasubramanian
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