# git rev-parse -q --verify f74fc58f295a45c29b565a898d869034099ca9a1^{commit}
f74fc58f295a45c29b565a898d869034099ca9a1
already have revision, skipping fetch
# git checkout -q -f -B kisskb f74fc58f295a45c29b565a898d869034099ca9a1
# git clean -qxdf
# < git log -1
# commit f74fc58f295a45c29b565a898d869034099ca9a1
# Author: Alexey Kardashevskiy <aik@ozlabs.ru>
# Date:   Thu Jul 18 15:11:39 2019 +1000
# 
#     powerpc/powernv/ioda2: Create bigger default window with 64k IOMMU pages
#     
#     At the moment we create a small window only for 32bit devices, the window
#     maps 0..2GB of the PCI space only. For other devices we either use
#     a sketchy bypass or hardware bypass but the former can only work if
#     the amount of RAM is no bigger than the device's DMA mask and the latter
#     requires devices to support at least 59bit DMA.
#     
#     This extends the default DMA window to the maximum size possible to allow
#     a wider DMA mask than just 32bit. The default window size is now limited
#     by the the iommu_table::it_map allocation bitmap which is a contiguous
#     array, 1 bit per an IOMMU page.
#     
#     This increases the default IOMMU page size from hard coded 4K to
#     the system page size to allow wider DMA masks.
#     
#     This increases the level number to not exceed the max order allocation
#     limit per TCE level. By the same time, this keeps minimal levels number
#     as 2 in order to save memory.
#     
#     As the extended window now overlaps the 32bit MMIO region, this adds
#     an area reservation to iommu_init_table().
#     
#     After this change the default window size is 0x80000000000==1<<43 so
#     devices limited to DMA mask smaller than the amount of system RAM can
#     still use more than just 2GB of memory for DMA.
#     
#     This is an optimization and not a bug fix for DMA API usage.
#     
#     With the on-demand allocation of indirect TCE table levels enabled and
#     2 levels, the first TCE level size is just
#     1<<ceil((log2(0x7ffffffffff+1)-16)/2)=16384 TCEs or 2 system pages.
#     
#     Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20190718051139.74787-5-aik@ozlabs.ru
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-ld --version
# < git log --format=%s --max-count=1 f74fc58f295a45c29b565a898d869034099ca9a1
# < make -s -j 120 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  defconfig
# make -s -j 120 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
FIT description: Linux 5.3.0-rc2-gf74fc58f295a
Created:         Fri Aug 16 00:10:47 2019
 Image 0 (kernel@0)
  Description:  Linux 5.3.0-rc2-gf74fc58f295a
  Created:      Fri Aug 16 00:10:47 2019
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    4707066 Bytes = 4596.74 KiB = 4.49 MiB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x808ae390
  Hash algo:    sha1
  Hash value:   e8e5c820dc0b6d90ac9db53655512acba0c7f4e1
 Image 1 (fdt@boston)
  Description:  img,boston Device Tree
  Created:      Fri Aug 16 00:10:47 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    3793 Bytes = 3.70 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   4799f50d688573234da6e9d7701234d394759ef4
 Image 2 (fdt@ni169445)
  Description:  NI 169445 device tree
  Created:      Fri Aug 16 00:10:47 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    1871 Bytes = 1.83 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   51b89b31605ee62038c8468c429af091dfc75ec7
 Image 3 (fdt@ocelot_pcb123)
  Description:  MSCC Ocelot PCB123 Device Tree
  Created:      Fri Aug 16 00:10:47 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    4615 Bytes = 4.51 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   8754eadee600cac22c9c34884cd901aac7e95e8a
 Image 4 (fdt@ocelot_pcb120)
  Description:  MSCC Ocelot PCB120 Device Tree
  Created:      Fri Aug 16 00:10:47 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    5174 Bytes = 5.05 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   1ab7d0871c0a9345c6269fb491bf028224da8256
 Image 5 (fdt@xilfpga)
  Description:  MIPSfpga (xilfpga) Device Tree
  Created:      Fri Aug 16 00:10:47 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    2708 Bytes = 2.64 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   63d058b780f65e22da30f0a183433765f1807f1d
 Default Configuration: 'conf@default'
 Configuration 0 (conf@default)
  Description:  Generic Linux kernel
  Kernel:       kernel@0
 Configuration 1 (conf@boston)
  Description:  Boston Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@boston
 Configuration 2 (conf@ni169445)
  Description:  NI 169445 Linux Kernel
  Kernel:       kernel@0
  FDT:          fdt@ni169445
 Configuration 3 (conf@ocelot_pcb123)
  Description:  Ocelot Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@ocelot_pcb123
 Configuration 4 (conf@ocelot_pcb120)
  Description:  Ocelot Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@ocelot_pcb120
 Configuration 5 (conf@xilfpga)
  Description:  MIPSfpga Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@xilfpga
Completed OK
# rm -rf /kisskb/build/powerpc-next_mips-defconfig_mipsel
# Build took: 0:01:03.246093