Buildresult: powerpc-fixes/x86_64-defconfig/x86_64-gcc8 built on Oct 2 2021, 01:21

kisskb

Revisions | Branches | Compilers | Configs | Build Results | Build Failures |

Status:	OK
Date/Time:	Oct 2 2021, 01:21
Duration:	0:02:32.842730
Builder:	ka2
Revision:	powerpc/iommu: Report the correct most efficient DMA mask for PCI devices (`23c216b335d1fbd716076e8263b54a714ea3cf0e)`
Target:	powerpc-fixes/x86_64-defconfig/x86_64-gcc8
Branch:	powerpc-fixes
Compiler:	x86_64-gcc8 (x86_64-linux-gcc (GCC) 8.1.0 / GNU ld (GNU Binutils) 2.30)
Config:	defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify 23c216b335d1fbd716076e8263b54a714ea3cf0e^{commit} 23c216b335d1fbd716076e8263b54a714ea3cf0e already have revision, skipping fetch # git checkout -q -f -B kisskb 23c216b335d1fbd716076e8263b54a714ea3cf0e # git clean -qxdf # < git log -1 # commit 23c216b335d1fbd716076e8263b54a714ea3cf0e # Author: Alexey Kardashevskiy <aik@ozlabs.ru> # Date: Thu Sep 30 13:44:54 2021 +1000 # # powerpc/iommu: Report the correct most efficient DMA mask for PCI devices # # According to dma-api.rst, the dma_get_required_mask() helper should return # "the mask that the platform requires to operate efficiently". Which in # the case of PPC64 means the bypass mask and not a mask from an IOMMU table # which is shorter and slower to use due to map/unmap operations (especially # expensive on "pseries"). # # However the existing implementation ignores the possibility of bypassing # and returns the IOMMU table mask on the pseries platform which makes some # drivers (mpt3sas is one example) choose 32bit DMA even though bypass is # supported. The powernv platform sort of handles it by having a bigger # default window with a mask >=40 but it only works as drivers choose # 63/64bit if the required mask is >32 which is rather pointless. # # This reintroduces the bypass capability check to let drivers make # a better choice of the DMA mask. # # Fixes: f1565c24b596 ("powerpc: use the generic dma_ops_bypass mode") # Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> # Reviewed-by: Christoph Hellwig <hch@lst.de> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20210930034454.95794-1-aik@ozlabs.ru # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 23c216b335d1fbd716076e8263b54a714ea3cf0e # < make -s -j 48 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- x86_64_defconfig # < make -s -j 48 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- help # make -s -j 48 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- olddefconfig # make -s -j 48 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- Completed OK # rm -rf /kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 # Build took: 0:02:32.842730

© Michael Ellerman 2006-2018.