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Subject: Re: [PATCH v13 2/6] powerpc: Move arch independent ima kexec
 functions to drivers/of/kexec.c
From:   Mimi Zohar <zohar@linux.ibm.com>
To:     Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
        bauerman@linux.ibm.com, robh@kernel.org,
        takahiro.akashi@linaro.org, gregkh@linuxfoundation.org,
        will@kernel.org, catalin.marinas@arm.com, mpe@ellerman.id.au
Cc:     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,
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        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,
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Date:   Tue, 22 Dec 2020 09:26:25 -0500
In-Reply-To: <20201219175713.18888-3-nramas@linux.microsoft.com>
References: <20201219175713.18888-1-nramas@linux.microsoft.com>
         <20201219175713.18888-3-nramas@linux.microsoft.com>
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Hi Lakshmi,

On Sat, 2020-12-19 at 09:57 -0800, Lakshmi Ramasubramanian wrote:
> 
> diff --git a/arch/powerpc/kexec/Makefile b/arch/powerpc/kexec/Makefile
> index 4aff6846c772..b6c52608cb49 100644
> --- a/arch/powerpc/kexec/Makefile
> +++ b/arch/powerpc/kexec/Makefile
> @@ -9,13 +9,6 @@ obj-$(CONFIG_PPC32)		+= relocate_32.o
>  
>  obj-$(CONFIG_KEXEC_FILE)	+= file_load.o ranges.o file_load_$(BITS).o elf_$(BITS).o
>  
> -ifdef CONFIG_HAVE_IMA_KEXEC
> -ifdef CONFIG_IMA
> -obj-y				+= ima.o
> -endif
> -endif

Notice how "kexec/ima.o" is only included if the architecture supports
it and IMA is configured.  In addition only if CONFIG_IMA_KEXEC is
configured, is the IMA measurement list carried across kexec.  After
moving the rest of ima.c to drivers/of/kexec.c, this changes.   Notice
how drivers/of/Kconfig includes kexec.o:

obj-$(CONFIG_KEXEC_FILE) += kexec.o

It is not dependent on CONFIG_HAVE_IMA_KEXEC.  Shouldn't all of the
functions defined in ima.c being moved to kexec.o be defined within a
CONFIG_HAVE_IMA_KEXEC ifdef?

thanks,

Mimi