Re: [PATCH v13 2/6] powerpc: Move arch independent ima kexec functions to drivers/of/kexec.c

Thiago Jung Bauermann
2020-12-23T00:21:31Z

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

> The functions defined in "arch/powerpc/kexec/ima.c" handle setting up
> and freeing the resources required to carry over the IMA measurement
> list from the current kernel to the next kernel across kexec system call.
> These functions do not have architecture specific code, but are
> currently limited to powerpc.
>
> Move setup_ima_buffer() call into of_kexec_setup_new_fdt() defined in
> "drivers/of/kexec.c".
>
> Move the remaining architecture independent functions from
> "arch/powerpc/kexec/ima.c" to "drivers/of/kexec.c".
> Delete "arch/powerpc/kexec/ima.c" and "arch/powerpc/include/asm/ima.h".
> Remove references to the deleted files in powerpc and in ima.
>
> 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>
> ---
> arch/powerpc/include/asm/ima.h | 27 ----
> arch/powerpc/kexec/Makefile | 7 -
> arch/powerpc/kexec/file_load.c | 7 -
> arch/powerpc/kexec/ima.c | 202 -------------------------
> drivers/of/kexec.c | 235 +++++++++++++++++++++++++++++
> include/linux/of.h | 2 +
> security/integrity/ima/ima.h | 4 -
> security/integrity/ima/ima_kexec.c | 1 +
> 8 files changed, 238 insertions(+), 247 deletions(-)
> delete mode 100644 arch/powerpc/include/asm/ima.h
> delete mode 100644 arch/powerpc/kexec/ima.c

This looks good, provided the changes from the discussion with Mimi are
made. Also, minor nits below.

> diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
> index 6ebefec616e4..7c3947ad3773 100644
> --- a/security/integrity/ima/ima.h
> +++ b/security/integrity/ima/ima.h
> @@ -24,10 +24,6 @@
>
> #include "../integrity.h"
>
> -#ifdef CONFIG_HAVE_IMA_KEXEC
> -#include <asm/ima.h>
> -#endif
> -
> enum ima_show_type { IMA_SHOW_BINARY, IMA_SHOW_BINARY_NO_FIELD_LEN,
> IMA_SHOW_BINARY_OLD_STRING_FMT, IMA_SHOW_ASCII };
> enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8, TPM_PCR10 = 10 };

This belongs in patch 1.

> diff --git a/security/integrity/ima/ima_kexec.c b/security/integrity/ima/ima_kexec.c
> index 38bcd7543e27..8a6712981dee 100644
> --- a/security/integrity/ima/ima_kexec.c
> +++ b/security/integrity/ima/ima_kexec.c
> @@ -10,6 +10,7 @@
> #include <linux/seq_file.h>
> #include <linux/vmalloc.h>
> #include <linux/kexec.h>
> +#include <linux/of.h>
> #include <linux/ima.h>
> #include "ima.h"

This include isn't necessary.

--
Thiago Jung Bauermann
IBM Linux Technology Center