Buildresult: powerpc-fixes/ppc64_defconfig+NO_HUGETLB+4K_PAGES/powerpc-gcc9 built on Oct 2 2021, 01:19

kisskb

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Status:	OK
Date/Time:	Oct 2 2021, 01:19
Duration:	0:02:41.298770
Builder:	ka4
Revision:	powerpc/iommu: Report the correct most efficient DMA mask for PCI devices (`23c216b335d1fbd716076e8263b54a714ea3cf0e)`
Target:	powerpc-fixes/ppc64_defconfig+NO_HUGETLB+4K_PAGES/powerpc-gcc9
Branch:	powerpc-fixes
Compiler:	powerpc-gcc9 (powerpc64-linux-gcc (GCC) 9.2.0 / GNU ld (GNU Binutils) 2.32)
Config:	ppc64_defconfig+NO_HUGETLB+4K_PAGES (download)
Log:	Download original Possible warnings (1) .config:4461:warning: override: reassigning to symbol PPC_4K_PAGES 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-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 23c216b335d1fbd716076e8263b54a714ea3cf0e # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+NO_HUGETLB+4K_PAGES_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc64_defconfig # Added to kconfig CONFIG_PPC_64K_PAGES=n # Added to kconfig CONFIG_PPC_4K_PAGES=y # Added to kconfig CONFIG_HUGETLBFS=n # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+NO_HUGETLB+4K_PAGES_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+NO_HUGETLB+4K_PAGES_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig .config:4461:warning: override: reassigning to symbol PPC_4K_PAGES # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+NO_HUGETLB+4K_PAGES_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc64_defconfig+NO_HUGETLB+4K_PAGES_powerpc-gcc9 # Build took: 0:02:41.298770

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