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

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Date:   Sat, 25 Feb 2023 00:22:22 +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

On Fri, Feb 24, 2023 at 04:12:49PM -0800, Randy Dunlap wrote:
> Hi Conor, Palmer,
> 
> On 12/27/22 10:59, Conor Dooley wrote:
> > 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 :)
> 
> Has this been solved (merged) yet?
> I'm still seeing a warning on linux-next-20230224.

I thought it was fixed in the iommu tree with this series:
https://lore.kernel.org/all/7a53ac6f-640b-436d-9bfa-3e49066b2460@arm.com/

If it is not, I'll take a look tomorrow...

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