# git rev-parse -q --verify eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f^{commit} eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f already have revision, skipping fetch # git checkout -q -f -B kisskb eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f # git clean -qxdf # < git log -1 # commit eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f # Author: Hari Bathini # Date: Mon Jul 27 01:10:28 2020 +0530 # # ppc64/kexec_file: fix kexec load failure with lack of memory hole # # The kexec purgatory has to run in real mode. Only the first memory # block maybe accessible in real mode. And, unlike the case with panic # kernel, no memory is set aside for regular kexec load. Another thing # to note is, the memory for crashkernel is reserved at an offset of # 128MB. So, when crashkernel memory is reserved, the memory ranges to # load kexec segments shrink further as the generic code only looks for # memblock free memory ranges and in all likelihood only a tiny bit of # memory from 0 to 128MB would be available to load kexec segments. # # With kdump being used by default in general, kexec file load is likely # to fail almost always. This can be fixed by changing the memory hole # lookup logic for regular kexec to use the same method as kdump. This # would mean that most kexec segments will overlap with crashkernel # memory region. That should still be ok as the pages, whose destination # address isn't available while loading, are placed in an intermediate # location till a flush to the actual destination address happens during # kexec boot sequence. # # Signed-off-by: Hari Bathini # Tested-by: Pingfan Liu # Reviewed-by: Thiago Jung Bauermann # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/159579242226.5790.13933486642004084417.stgit@hbathini # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 eaa567ccaf3a2a7b14ffa38af4bd09613aa1830f # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_mpc85xx_cds_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 85xx/mpc85xx_cds_defconfig # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_mpc85xx_cds_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_mpc85xx_cds_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_mpc85xx_cds_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0x5532c8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5532c8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5532c8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x542bcc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.8.0-rc2-geaa567ccaf3a Created: Wed Jul 29 01:37:54 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2748208 Bytes = 2683.80 KiB = 2.62 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.8.0-rc2-geaa567ccaf3a Created: Wed Jul 29 01:37:54 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2778294 Bytes = 2713.18 KiB = 2.65 MiB Load Address: 00600000 Entry Point: 006002a4 Image Name: Linux-5.8.0-rc2-geaa567ccaf3a Created: Wed Jul 29 01:37:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2776772 Bytes = 2711.69 KiB = 2.65 MiB Load Address: 00600000 Entry Point: 006002a4 Image Name: Linux-5.8.0-rc2-geaa567ccaf3a Created: Wed Jul 29 01:37:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2776770 Bytes = 2711.69 KiB = 2.65 MiB Load Address: 00600000 Entry Point: 006002a4 Completed OK # rm -rf /kisskb/build/powerpc-next_85xx_mpc85xx_cds_defconfig_powerpc-gcc5 # Build took: 0:00:54.337670