# 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/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 f74fc58f295a45c29b565a898d869034099ca9a1
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc64_defconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/drivers/macintosh/smu.c: In function 'smu_queue_i2c':
/kisskb/src/drivers/macintosh/smu.c:854:21: warning: this statement may fall through [-Wimplicit-fallthrough=]
   cmd->info.devaddr &= 0xfe;
   ~~~~~~~~~~~~~~~~~~^~~~~~~
/kisskb/src/drivers/macintosh/smu.c:855:2: note: here
  case SMU_I2C_TRANSFER_STDSUB:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c: In function 'send_afu_cmd':
/kisskb/src/drivers/scsi/cxlflash/main.c:2347:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (rc) {
      ^
/kisskb/src/drivers/scsi/cxlflash/main.c:2357:2: note: here
  case -EAGAIN:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c: In function 'term_intr':
/kisskb/src/drivers/scsi/cxlflash/main.c:754:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (index == PRIMARY_HWQ)
      ^
/kisskb/src/drivers/scsi/cxlflash/main.c:756:2: note: here
  case UNMAP_TWO:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:757:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   cfg->ops->unmap_afu_irq(hwq->ctx_cookie, 2, hwq);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:758:2: note: here
  case UNMAP_ONE:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:759:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   cfg->ops->unmap_afu_irq(hwq->ctx_cookie, 1, hwq);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:760:2: note: here
  case FREE_IRQ:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c: In function 'cxlflash_remove':
/kisskb/src/drivers/scsi/cxlflash/main.c:975:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   cxlflash_release_chrdev(cfg);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:976:2: note: here
  case INIT_STATE_SCSI:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:978:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   scsi_remove_host(cfg->host);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:979:2: note: here
  case INIT_STATE_AFU:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:980:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   term_afu(cfg);
   ^~~~~~~~~~~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:981:2: note: here
  case INIT_STATE_PCI:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:983:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   pci_disable_device(pdev);
   ^~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/scsi/cxlflash/main.c:984:2: note: here
  case INIT_STATE_NONE:
  ^~~~
/kisskb/src/drivers/scsi/cxlflash/main.c: In function 'num_hwqs_store':
/kisskb/src/drivers/scsi/cxlflash/main.c:3018:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (cfg->state == STATE_NORMAL)
      ^
/kisskb/src/drivers/scsi/cxlflash/main.c:3020:2: note: here
  default:
  ^~~~~~~
/kisskb/src/drivers/scsi/ibmvscsi/ibmvfc.c: In function 'ibmvfc_npiv_login_done':
/kisskb/src/drivers/scsi/ibmvscsi/ibmvfc.c:4022:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   ibmvfc_retry_host_init(vhost);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/scsi/ibmvscsi/ibmvfc.c:4023:2: note: here
  case IBMVFC_MAD_DRIVER_FAILED:
  ^~~~
/kisskb/src/drivers/scsi/ibmvscsi/ibmvfc.c: In function 'ibmvfc_bsg_request':
/kisskb/src/drivers/scsi/ibmvscsi/ibmvfc.c:1830:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
   port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    (bsg_request->rqst_data.h_els.port_id[1] << 8) |
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    bsg_request->rqst_data.h_els.port_id[2];
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/scsi/ibmvscsi/ibmvfc.c:1833:2: note: here
  case FC_BSG_RPT_ELS:
  ^~~~
/kisskb/src/drivers/scsi/ibmvscsi/ibmvfc.c:1838:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
   port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    bsg_request->rqst_data.h_ct.port_id[2];
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/scsi/ibmvscsi/ibmvfc.c:1841:2: note: here
  case FC_BSG_RPT_CT:
  ^~~~
In file included from /kisskb/src/include/linux/kernel.h:15,
                 from /kisskb/src/include/linux/list.h:9,
                 from /kisskb/src/include/linux/kobject.h:19,
                 from /kisskb/src/include/linux/device.h:16,
                 from /kisskb/src/drivers/net/ethernet/ibm/ehea/ehea_main.c:17:
/kisskb/src/drivers/net/ethernet/ibm/ehea/ehea_main.c: In function 'ehea_mem_notifier':
/kisskb/src/include/linux/printk.h:311:2: warning: this statement may fall through [-Wimplicit-fallthrough=]
  printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/net/ethernet/ibm/ehea/ehea_main.c:3253:3: note: in expansion of macro 'pr_info'
   pr_info("memory offlining canceled");
   ^~~~~~~
/kisskb/src/drivers/net/ethernet/ibm/ehea/ehea_main.c:3256:2: note: here
  case MEM_ONLINE:
  ^~~~
/kisskb/src/drivers/net/ethernet/toshiba/spider_net.c: In function 'spider_net_release_tx_chain':
/kisskb/src/drivers/net/ethernet/toshiba/spider_net.c:783:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
    if (!brutal) {
       ^
/kisskb/src/drivers/net/ethernet/toshiba/spider_net.c:792:3: note: here
   case SPIDER_NET_DESCR_RESPONSE_ERROR:
   ^~~~
/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: warning: orphan section `.gnu.hash' from `linker stubs' being placed in section `.gnu.hash'.
/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: warning: orphan section `.gnu.hash' from `linker stubs' being placed in section `.gnu.hash'.
/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: warning: orphan section `.gnu.hash' from `linker stubs' being placed in section `.gnu.hash'.
Completed OK
# rm -rf /kisskb/build/powerpc-next_ppc64_defconfig_powerpc-gcc8
# Build took: 0:04:07.990069