linux-kernel - Re: [PATCH 1/3] integrity: Make arch_ima_get

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Message-ID: <CAMj1kXFBMSEdRL8FotASbQO3dcfNG0bpp9Vnm5JPn-yjyDr=GA@mail.gmail.com>
Date: Wed, 21 Jan 2026 17:25:39 +0100
From: Ard Biesheuvel <ardb@...nel.org>
To: Mimi Zohar <zohar@...ux.ibm.com>
Cc: Coiby Xu <coxu@...hat.com>, Dave Hansen <dave.hansen@...el.com>, 
	linux-integrity@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>, 
	Roberto Sassu <roberto.sassu@...weicloud.com>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <will@...nel.org>, Madhavan Srinivasan <maddy@...ux.ibm.com>, 
	Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, 
	"Christophe Leroy (CS GROUP)" <chleroy@...nel.org>, Vasily Gorbik <gor@...ux.ibm.com>, 
	Alexander Gordeev <agordeev@...ux.ibm.com>, Christian Borntraeger <borntraeger@...ux.ibm.com>, 
	Sven Schnelle <svens@...ux.ibm.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
	Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
	"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>, Roberto Sassu <roberto.sassu@...wei.com>, 
	Dmitry Kasatkin <dmitry.kasatkin@...il.com>, Eric Snowberg <eric.snowberg@...cle.com>, 
	Paul Moore <paul@...l-moore.com>, James Morris <jmorris@...ei.org>, 
	"Serge E. Hallyn" <serge@...lyn.com>, Jarkko Sakkinen <jarkko@...nel.org>, 
	"moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)" <linux-arm-kernel@...ts.infradead.org>, 
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	"open list:EXTENSIBLE FIRMWARE INTERFACE (EFI)" <linux-efi@...r.kernel.org>, 
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Subject: Re: [PATCH 1/3] integrity: Make arch_ima_get_secureboot integrity-wide

On Wed, 21 Jan 2026 at 16:41, Mimi Zohar <zohar@...ux.ibm.com> wrote:
>
> On Mon, 2026-01-19 at 12:04 +0800, Coiby Xu wrote:
>
> > diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
> > index 976e75f9b9ba..5dce572192d6 100644
> > --- a/security/integrity/ima/Kconfig
> > +++ b/security/integrity/ima/Kconfig
> > @@ -311,6 +311,7 @@ config IMA_QUEUE_EARLY_BOOT_KEYS
> >   config IMA_SECURE_AND_OR_TRUSTED_BOOT
> >          bool
> >          depends on IMA_ARCH_POLICY
> > +       depends on INTEGRITY_SECURE_BOOT
> >
> >
> > Another idea is make a tree-wide arch_get_secureboot i.e. to move
> > current arch_ima_get_secureboot code to arch-specific secure boot
> > implementation. By this way, there will no need for a new Kconfig option
> > INTEGRITY_SECURE_BOOT. But I'm not sure if there is any unforeseen
> > concern.
>
> Originally basing IMA policy on the secure boot mode was an exception.  As long
> as making it public isn't an issue any longer, this sounds to me.  Ard, Dave, do
> you have any issues with replacing arch_ima_get_secureboot() with
> arch_get_secureboot()?

I don't see an issue with that. If there is a legitimate need to
determine this even if IMA is not enabled, then this makes sense.