linux-kernel - Re: kismet: WARNING: unmet direct dependencies detected for IOMMU_IO_PGTABLE_LPAE when selected by IPMMU

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Message-ID: <Y6tAgP7UoP3aYBjq@spud>
Date:   Tue, 27 Dec 2022 18:59:12 +0000
From:   Conor Dooley <conor@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     kernel test robot <lkp@...el.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Paul Gazzillo <paul@...zz.com>,
        Necip Fazil Yildiran <fazilyildiran@...il.com>,
        oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Guo Ren <guoren@...nel.org>
Subject: Re: kismet: WARNING: unmet direct dependencies detected for
 IOMMU_IO_PGTABLE_LPAE when selected by IPMMU_VMSA

Hey Randy,

On Thu, Dec 22, 2022 at 05:00:06PM -0800, Randy Dunlap wrote:
> On 12/21/22 20:49, kernel test robot wrote:
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head:   9d2f6060fe4c3b49d0cdc1dce1c99296f33379c8
> > commit: 8292493c22c8e28b6e67a01e0f5c6db1cf231eb1 riscv: Kconfig.socs: Add ARCH_RENESAS kconfig option
> > date:   6 weeks ago
> > config: riscv-kismet-CONFIG_IOMMU_IO_PGTABLE_LPAE-CONFIG_IPMMU_VMSA-0-0
> > reproduce:
> >         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8292493c22c8e28b6e67a01e0f5c6db1cf231eb1
> >         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> >         git fetch --no-tags linus master
> >         git checkout 8292493c22c8e28b6e67a01e0f5c6db1cf231eb1
> >         # 1. reproduce by kismet
> >            # install kmax per https://github.com/paulgazz/kmax/blob/master/README.md
> >            kismet --linux-ksrc=linux --selectees CONFIG_IOMMU_IO_PGTABLE_LPAE --selectors CONFIG_IPMMU_VMSA -a=riscv
> >         # 2. reproduce by make
> >            # save the config file to linux source tree
> >            cd linux
> >            make ARCH=riscv olddefconfig
> > 
> > If you fix the issue, kindly add following tag where applicable
> > | Reported-by: kernel test robot <lkp@...el.com>
> > 
> > kismet warnings: (new ones prefixed by >>)
> >>> kismet: WARNING: unmet direct dependencies detected for IOMMU_IO_PGTABLE_LPAE when selected by IPMMU_VMSA
> >    .config:4814:warning: symbol value 'ONFIG_ARCH_MMAP_RND_BITS_MI' invalid for ARCH_MMAP_RND_BITS
> >    
> >    WARNING: unmet direct dependencies detected for IOMMU_IO_PGTABLE_LPAE
> >      Depends on [n]: IOMMU_SUPPORT [=y] && (ARM || ARM64 || COMPILE_TEST [=y] && !GENERIC_ATOMIC64 [=y])
> >      Selected by [y]:
> >      - IPMMU_VMSA [=y] && IOMMU_SUPPORT [=y] && (ARCH_RENESAS [=y] || COMPILE_TEST [=y] && !GENERIC_ATOMIC64 [=y])
> > 
> 
> Maybe this:
> 
> ---
>  drivers/iommu/Kconfig |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff -- a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -32,7 +32,8 @@ config IOMMU_IO_PGTABLE
>  config IOMMU_IO_PGTABLE_LPAE
>  	bool "ARMv7/v8 Long Descriptor Format"
>  	select IOMMU_IO_PGTABLE
> -	depends on ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)
> +	depends on ARM || ARM64 || ARCH_RENESAS || \
> +		(COMPILE_TEST && !GENERIC_ATOMIC64)
>  	help
>  	  Enable support for the ARM long descriptor pagetable format.
>  	  This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
> 
> 
> or is way off?

Apologies for the radio silence here..

Palmer initially sent a workaround and there was some discussion there:
https://lore.kernel.org/all/20221214180409.7354-1-palmer@rivosinc.com/
Guo sent a patch too:
https://lore.kernel.org/linux-riscv/20221215073212.1966823-1-guoren@kernel.org/

I suppose Christmas is doing Christmas things :)

Thanks,
Conor.


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