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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 30/11/2022 13:55, Andrew Jones wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On Wed, Nov 30, 2022 at 12:47:03PM +0000, Conor.Dooley@microchip.com wrote: >> On 30/11/2022 12:25, Andrew Jones wrote: >>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe >>> >>> On Wed, Nov 30, 2022 at 12:33:14PM +0100, Andrew Jones wrote: >>>> On Wed, Nov 30, 2022 at 09:46:20AM +0000, Conor.Dooley@microchip.com wrote: >>>>> On 29/11/2022 19:45, Conor Dooley wrote: >>>>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe >>>>>> >>>>>> Hey Drew, >>>>>> >>>>>> On Tue, Nov 29, 2022 at 03:34:47PM +0100, Andrew Jones wrote: >>>>>>> When a DT puts zicbom in the isa string, but does not provide a block >>>>>>> size, ALT_CMO_OP() will attempt to do cache operations on address >>>>>>> zero since the start address will be ANDed with zero. We can't simply >>>>>>> BUG() in riscv_init_cbom_blocksize() when we fail to find a block >>>>>>> size because the failure will happen before logging works, leaving >>>>>>> users to scratch their heads as to why the boot hung. Instead, ensure >>>>>>> Zicbom is disabled and output an error which will hopefully alert >>>>>>> people that the DT needs to be fixed. While at it, add a check that >>>>>>> the block size is a power-of-2 too. >>>>>>> >>>>>>> Signed-off-by: Andrew Jones >>>>>>> Reviewed-by: Conor Dooley >>>>>> >>>>>> This seems to be failing on nommu :/ I've got host machines issues so I >>>>>> could not reproduce it for you lcoally and paste an actual log, but if >>>>>> you build rv64_nommu_virt_defconfig I think you should be able to >>> >>> You mean a 64-bit build with 'nommu_virt_defconfig', right? There isn't a >>> 'rv64_nommu_virt_defconfig' that I know of. >>> >>>>>> reproduce. >>>>> >>>>> The actual error is: >>>>> riscv64-unknown-linux-gnu-ld: arch/riscv/kernel/cpufeature.o: in function `.L0 ': >>>>> cpufeature.c:(.text.unlikely+0x8): undefined reference to `riscv_cbom_block_size' >>>> >>> >>> I can't reproduce this. The following commands work fine for me >>> >>> $ make ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- O=build nommu_virt_defconfig >>> $ make ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- O=build -j$(nproc) >>> >>> And llvm also works >>> >>> $ make ARCH=riscv LLVM=1 O=build-llvm nommu_virt_defconfig >>> $ make ARCH=riscv LLVM=1 O=build-llvm -j$(nproc) >>> >>> Additionally, I can't see how riscv_cbom_block_size wouldn't be defined. >>> It's exported from arch/riscv/mm/cacheflush.c, which is always built, >>> and no ifdefery wraps it. >> >> The base commit matters here, it picked riscv/for-next as the base for >> this series. I guess this depends on some stuff that's in fixes only? > > It looks like riscv/for-next is based on v6.1-rc1, but commit 5c20a3a9df19 > ("RISC-V: Fix compilation without RISCV_ISA_ZICBOM") was merged for > v6.1-rc2. Tut, silly me. Should have been immediately obvious... I completely forgot about that, sorry for the trouble. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv