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Date: Fri, 5 Nov 2021 20:31:56 -0700 From: Florian Fainelli <f.fainelli@...il.com> To: Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org Cc: kernel test robot <lkp@...el.com>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, bcm-kernel-feedback-list@...adcom.com, linux-mips@...r.kernel.org, Paul Burton <paulburton@...nel.org>, Maxime Bizon <mbizon@...ebox.fr>, Ralf Baechle <ralf@...ux-mips.org> Subject: Re: [RFC PATCH] mips: BCM63XX: select CPU_SUPPORTS_32BIT_KERNEL On 11/5/2021 7:58 PM, Randy Dunlap wrote: > > Several header files need info on CONFIG_32BIT or CONFIG_64BIT, > but kconfig symbol BCM63XX does not provide that info. This leads > to many build errors, e.g.: > > arch/mips/include/asm/page.h:196:13: error: use of undeclared identifier 'CAC_BASE' > return x - PAGE_OFFSET + PHYS_OFFSET; > arch/mips/include/asm/mach-generic/spaces.h:91:23: note: expanded from macro 'PAGE_OFFSET' > #define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET) > arch/mips/include/asm/io.h:134:28: error: use of undeclared identifier 'CAC_BASE' > return (void *)(address + PAGE_OFFSET - PHYS_OFFSET); > arch/mips/include/asm/mach-generic/spaces.h:91:23: note: expanded from macro 'PAGE_OFFSET' > #define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET) > > arch/mips/include/asm/uaccess.h:82:10: error: use of undeclared identifier '__UA_LIMIT' > return (__UA_LIMIT & (addr | (addr + size) | __ua_size(size))) == 0; > > > Fixes: e7300d04bd08 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.") > Signed-off-by: Randy Dunlap <rdunlap@...radead.org> > Reported-by: kernel test robot <lkp@...el.com> > Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de> > Cc: Florian Fainelli <f.fainelli@...il.com> > Cc: bcm-kernel-feedback-list@...adcom.com > Cc: linux-mips@...r.kernel.org > Cc: Paul Burton <paulburton@...nel.org> > Cc: Maxime Bizon <mbizon@...ebox.fr> > Cc: Ralf Baechle <ralf@...ux-mips.org> > --- > Note: I did see a bunch of build errors like this one: > ../arch/mips/kernel/r4k_fpu.S:217: Error: opcode not supported on this processor: mips1 (mips1) `ldc1 $f24,192($4)' > but I'm hoping/guessing that this is due to not having a proper compiler > for the BCM63xx target. > > arch/mips/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > --- linux-next-20211105.orig/arch/mips/Kconfig > +++ linux-next-20211105/arch/mips/Kconfig > @@ -329,6 +329,7 @@ config BCM63XX > select SYNC_R4K > select DMA_NONCOHERENT > select IRQ_MIPS_CPU > + select CPU_SUPPORTS_32BIT_KERNEL That's one option, the other could be to add: select SYS_HAS_CPU_BMIPS32_3300 select SYS_HAS_CPU_BMIPS4350 select SYS_HAS_CPU_BMIPS4380 Which would ensure that CPU_SUPPORTS_32BIT_KERNEL is selected AFAICT. Can you try that? What config file did you use to produce that build error BTW? -- Florian
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