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SubjectRe: [PATCH v7] x86/kexec: Carry forward IMA measurement log on kexec
On 06/30/22 at 08:36am, Jonathan McDowell wrote:
> On kexec file load, the 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 and ARM64 both achieve this using device tree with a
> "linux,ima-kexec-buffer" node. x86 platforms generally don't make use of
> device tree, so use the setup_data mechanism to pass the IMA buffer to
> the new kernel.
> (Mimi, Baoquan, I haven't included your reviewed-bys because this has
> changed the section annotations to __init and Boris reasonably enough
> wants to make sure IMA folk are happy before taking this update.)
> Signed-off-by: Jonathan McDowell <>
> Link:


Reviewed-by: Baoquan He <>

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