Re: [PATCH v6 3/3] arm64: Add IMA kexec buffer to DTB

Thiago Jung Bauermann
2020-09-12T03:24:47Z

Lakshmi Ramasubramanian <nramas@linux.microsoft.com> writes:

> Any existing FDT_PROP_IMA_KEXEC_BUFFER property in the device tree
> needs to be removed and its corresponding memory reservation in
> the currently running kernel needs to be freed.
>
> The address and size of the current kernel's IMA measurement log need
> to be added to the device tree's IMA kexec buffer node and memory for
> the buffer needs to be reserved for the log to be carried over to
> the next kernel on the kexec call.
>
> Remove any existing FDT_PROP_IMA_KEXEC_BUFFER property in the device
> tree and free the corresponding memory reservation in the currently
> running kernel. Add FDT_PROP_IMA_KEXEC_BUFFER property to the device
> tree and reserve the memory for storing the IMA log.
> Update CONFIG_KEXEC_FILE to select CONFIG_HAVE_IMA_KEXEC to indicate
> that the IMA measurement log information is present in the device tree
> for ARM64.
>
> Co-developed-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
> Signed-off-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
> Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>

Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>

--
Thiago Jung Bauermann
IBM Linux Technology Center