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* [PATCH] powerpc: Make PPC_64K_PAGES depend on only 44x or PPC_BOOK3S_64
@ 2019-02-08 12:34 Michael Ellerman
  2019-02-08 13:01 ` Christophe Leroy
  0 siblings, 1 reply; 3+ messages in thread
From: Michael Ellerman @ 2019-02-08 12:34 UTC (permalink / raw)
  To: linuxppc-dev; +Cc: oss, aneesh.kumar

In commit 7820856a4fcd ("powerpc/mm/book3e/64: Remove unsupported
64Kpage size from 64bit booke") we dropped the 64K page size support
from the 64-bit nohash (Book3E) code.

But we didn't update the dependencies of the PPC_64K_PAGES option,
meaning a randconfig can still trigger this code and cause a build
breakage, eg:
  arch/powerpc/include/asm/nohash/64/pgtable.h:14:2: error: #error "Page size not supported"
  arch/powerpc/include/asm/nohash/mmu-book3e.h:275:2: error: #error Unsupported page size

So remove PPC_BOOK3E_64 from the dependencies. This also means we
don't need to worry about PPC_FSL_BOOK3E, because that was just trying
to prevent the PPC_BOOK3E_64=y && PPC_FSL_BOOK3E=y case.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 3f237ffa0649..7a16b8a7b54b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -694,7 +694,7 @@ config PPC_16K_PAGES
 
 config PPC_64K_PAGES
 	bool "64k page size"
-	depends on !PPC_FSL_BOOK3E && (44x || PPC_BOOK3S_64 || PPC_BOOK3E_64)
+	depends on 44x || PPC_BOOK3S_64
 	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 
 config PPC_256K_PAGES
-- 
2.20.1


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] powerpc: Make PPC_64K_PAGES depend on only 44x or PPC_BOOK3S_64
  2019-02-08 12:34 [PATCH] powerpc: Make PPC_64K_PAGES depend on only 44x or PPC_BOOK3S_64 Michael Ellerman
@ 2019-02-08 13:01 ` Christophe Leroy
  2019-02-09 19:18   ` Scott Wood
  0 siblings, 1 reply; 3+ messages in thread
From: Christophe Leroy @ 2019-02-08 13:01 UTC (permalink / raw)
  To: Michael Ellerman, linuxppc-dev; +Cc: oss, aneesh.kumar



On 02/08/2019 12:34 PM, Michael Ellerman wrote:
> In commit 7820856a4fcd ("powerpc/mm/book3e/64: Remove unsupported
> 64Kpage size from 64bit booke") we dropped the 64K page size support
> from the 64-bit nohash (Book3E) code.
> 
> But we didn't update the dependencies of the PPC_64K_PAGES option,
> meaning a randconfig can still trigger this code and cause a build
> breakage, eg:
>    arch/powerpc/include/asm/nohash/64/pgtable.h:14:2: error: #error "Page size not supported"
>    arch/powerpc/include/asm/nohash/mmu-book3e.h:275:2: error: #error Unsupported page size
> 
> So remove PPC_BOOK3E_64 from the dependencies. This also means we
> don't need to worry about PPC_FSL_BOOK3E, because that was just trying
> to prevent the PPC_BOOK3E_64=y && PPC_FSL_BOOK3E=y case.

Does it means some cleanup could be done, for instance:

arch/powerpc/include/asm/nohash/64/pgalloc.h:#ifndef CONFIG_PPC_64K_PAGES
arch/powerpc/include/asm/nohash/64/pgalloc.h:#endif /* 
CONFIG_PPC_64K_PAGES */
arch/powerpc/include/asm/nohash/64/pgtable.h:#ifdef CONFIG_PPC_64K_PAGES
arch/powerpc/include/asm/nohash/64/slice.h:#ifdef CONFIG_PPC_64K_PAGES
arch/powerpc/include/asm/nohash/64/slice.h:#else /* CONFIG_PPC_64K_PAGES */
arch/powerpc/include/asm/nohash/64/slice.h:#endif /* 
!CONFIG_PPC_64K_PAGES */
arch/powerpc/include/asm/nohash/pte-book3e.h:#ifdef CONFIG_PPC_64K_PAGES

arch/powerpc/mm/tlb_low_64e.S:#ifdef CONFIG_PPC_64K_PAGES
arch/powerpc/mm/tlb_low_64e.S:#ifndef CONFIG_PPC_64K_PAGES
arch/powerpc/mm/tlb_low_64e.S:#endif /* CONFIG_PPC_64K_PAGES */
arch/powerpc/mm/tlb_low_64e.S:#ifdef CONFIG_PPC_64K_PAGES
arch/powerpc/mm/tlb_low_64e.S:#ifdef CONFIG_PPC_64K_PAGES
arch/powerpc/mm/tlb_low_64e.S:#ifndef CONFIG_PPC_64K_PAGES
arch/powerpc/mm/tlb_low_64e.S:#endif /* CONFIG_PPC_64K_PAGES */
arch/powerpc/mm/tlb_low_64e.S:#ifndef CONFIG_PPC_64K_PAGES
arch/powerpc/mm/tlb_low_64e.S:#endif /* CONFIG_PPC_64K_PAGES */
arch/powerpc/mm/tlb_low_64e.S:#ifndef CONFIG_PPC_64K_PAGES
arch/powerpc/mm/tlb_low_64e.S:#ifdef CONFIG_PPC_64K_PAGES


Christophe

> 
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
> ---
>   arch/powerpc/Kconfig | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 3f237ffa0649..7a16b8a7b54b 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -694,7 +694,7 @@ config PPC_16K_PAGES
>   
>   config PPC_64K_PAGES
>   	bool "64k page size"
> -	depends on !PPC_FSL_BOOK3E && (44x || PPC_BOOK3S_64 || PPC_BOOK3E_64)
> +	depends on 44x || PPC_BOOK3S_64
>   	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
>   
>   config PPC_256K_PAGES
> 

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] powerpc: Make PPC_64K_PAGES depend on only 44x or PPC_BOOK3S_64
  2019-02-08 13:01 ` Christophe Leroy
@ 2019-02-09 19:18   ` Scott Wood
  0 siblings, 0 replies; 3+ messages in thread
From: Scott Wood @ 2019-02-09 19:18 UTC (permalink / raw)
  To: Christophe Leroy, Michael Ellerman, linuxppc-dev; +Cc: aneesh.kumar

On Fri, 2019-02-08 at 13:01 +0000, Christophe Leroy wrote:
> 
> On 02/08/2019 12:34 PM, Michael Ellerman wrote:
> > In commit 7820856a4fcd ("powerpc/mm/book3e/64: Remove unsupported
> > 64Kpage size from 64bit booke") we dropped the 64K page size support
> > from the 64-bit nohash (Book3E) code.
> > 
> > But we didn't update the dependencies of the PPC_64K_PAGES option,
> > meaning a randconfig can still trigger this code and cause a build
> > breakage, eg:
> >    arch/powerpc/include/asm/nohash/64/pgtable.h:14:2: error: #error "Page
> > size not supported"
> >    arch/powerpc/include/asm/nohash/mmu-book3e.h:275:2: error: #error
> > Unsupported page size
> > 
> > So remove PPC_BOOK3E_64 from the dependencies. This also means we
> > don't need to worry about PPC_FSL_BOOK3E, because that was just trying
> > to prevent the PPC_BOOK3E_64=y && PPC_FSL_BOOK3E=y case.
> 
> Does it means some cleanup could be done, for instance:
> 
> arch/powerpc/include/asm/nohash/64/pgalloc.h:#ifndef CONFIG_PPC_64K_PAGES
> arch/powerpc/include/asm/nohash/64/pgalloc.h:#endif /* 
> CONFIG_PPC_64K_PAGES */
> arch/powerpc/include/asm/nohash/64/pgtable.h:#ifdef CONFIG_PPC_64K_PAGES
> arch/powerpc/include/asm/nohash/64/slice.h:#ifdef CONFIG_PPC_64K_PAGES
> arch/powerpc/include/asm/nohash/64/slice.h:#else /* CONFIG_PPC_64K_PAGES */
> arch/powerpc/include/asm/nohash/64/slice.h:#endif /* 
> !CONFIG_PPC_64K_PAGES */
> arch/powerpc/include/asm/nohash/pte-book3e.h:#ifdef CONFIG_PPC_64K_PAGES
> 
> arch/powerpc/mm/tlb_low_64e.S:#ifdef CONFIG_PPC_64K_PAGES
> arch/powerpc/mm/tlb_low_64e.S:#ifndef CONFIG_PPC_64K_PAGES
> arch/powerpc/mm/tlb_low_64e.S:#endif /* CONFIG_PPC_64K_PAGES */
> arch/powerpc/mm/tlb_low_64e.S:#ifdef CONFIG_PPC_64K_PAGES
> arch/powerpc/mm/tlb_low_64e.S:#ifdef CONFIG_PPC_64K_PAGES
> arch/powerpc/mm/tlb_low_64e.S:#ifndef CONFIG_PPC_64K_PAGES
> arch/powerpc/mm/tlb_low_64e.S:#endif /* CONFIG_PPC_64K_PAGES */
> arch/powerpc/mm/tlb_low_64e.S:#ifndef CONFIG_PPC_64K_PAGES
> arch/powerpc/mm/tlb_low_64e.S:#endif /* CONFIG_PPC_64K_PAGES */
> arch/powerpc/mm/tlb_low_64e.S:#ifndef CONFIG_PPC_64K_PAGES
> arch/powerpc/mm/tlb_low_64e.S:#ifdef CONFIG_PPC_64K_PAGES

More generally, if fsl is the only supported book3e platform and that's not
expected to change, everything in tlb_low_64e.S except the bolted and e6500
variants could go away.

-Scott



^ permalink raw reply	[flat|nested] 3+ messages in thread

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2019-02-08 12:34 [PATCH] powerpc: Make PPC_64K_PAGES depend on only 44x or PPC_BOOK3S_64 Michael Ellerman
2019-02-08 13:01 ` Christophe Leroy
2019-02-09 19:18   ` Scott Wood

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