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Subject[ogabbay:habanalabs-next 52/61] drivers/misc/habanalabs/gaudi2/gaudi2.c:1821: undefined reference to `__udivdi3'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ogabbay/linux.git habanalabs-next
head: 5e0af3d63d4c6ac96a1190a5c888796a6b599f83
commit: 349d6e1f6e46812a35bf57c9917cccbb31ba5a1a [52/61] habanalabs: add gaudi2 asic-specific code
config: m68k-randconfig-r021-20220629 (https://download.01.org/0day-ci/archive/20220701/202207011105.yOohE2qe-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/ogabbay/linux.git/commit/?id=349d6e1f6e46812a35bf57c9917cccbb31ba5a1a
git remote add ogabbay https://git.kernel.org/pub/scm/linux/kernel/git/ogabbay/linux.git
git fetch --no-tags ogabbay habanalabs-next
git checkout 349d6e1f6e46812a35bf57c9917cccbb31ba5a1a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

m68k-linux-ld: drivers/misc/habanalabs/gaudi2/gaudi2.o: in function `gaudi2_set_dram_properties':
>> drivers/misc/habanalabs/gaudi2/gaudi2.c:1821: undefined reference to `__udivdi3'


vim +1821 drivers/misc/habanalabs/gaudi2/gaudi2.c

1774
1775 static int gaudi2_set_dram_properties(struct hl_device *hdev)
1776 {
1777 struct asic_fixed_properties *prop = &hdev->asic_prop;
1778 u32 basic_hbm_page_size;
1779 int rc;
1780
1781 rc = set_number_of_functional_hbms(hdev);
1782 if (rc)
1783 return -EINVAL;
1784
1785 /*
1786 * Due to HW bug in which TLB size is x16 smaller than expected we use a workaround
1787 * in which we are using x16 bigger page size to be able to populate the entire
1788 * HBM mappings in the TLB
1789 */
1790 basic_hbm_page_size = prop->num_functional_hbms * SZ_8M;
1791 prop->dram_page_size = GAUDI2_COMPENSATE_TLB_PAGE_SIZE_FACTOR * basic_hbm_page_size;
1792 prop->device_mem_alloc_default_page_size = prop->dram_page_size;
1793 prop->dram_size = prop->num_functional_hbms * SZ_16G;
1794 prop->dram_base_address = DRAM_PHYS_BASE;
1795 prop->dram_end_address = prop->dram_base_address + prop->dram_size;
1796 prop->dram_supports_virtual_memory = true;
1797
1798 prop->dram_user_base_address = DRAM_PHYS_BASE + prop->dram_page_size;
1799 prop->dram_hints_align_mask = ~GAUDI2_HBM_MMU_SCRM_ADDRESS_MASK;
1800 prop->hints_dram_reserved_va_range.start_addr = RESERVED_VA_RANGE_FOR_ARC_ON_HBM_START;
1801 prop->hints_dram_reserved_va_range.end_addr = RESERVED_VA_RANGE_FOR_ARC_ON_HBM_END;
1802
1803 /* since DRAM page size differs from dmmu page size we need to allocate
1804 * DRAM memory in units of dram_page size and mapping this memory in
1805 * units of DMMU page size. we overcome this size mismatch using a
1806 * scarmbling routine which takes a DRAM page and converts it to a DMMU
1807 * page.
1808 * We therefore:
1809 * 1. partition the virtual address space to DRAM-page (whole) pages.
1810 * (suppose we get n such pages)
1811 * 2. limit the amount of virtual address space we got from 1 above to
1812 * a multiple of 64M as we don't want the scrambled address to cross
1813 * the DRAM virtual address space.
1814 * ( m = (n * DRAM_page_size) / DMMU_page_size).
1815 * 3. determine the and address accordingly
1816 * end_addr = start_addr + m * 48M
1817 *
1818 * the DRAM address MSBs (63:48) are not part of the roundup calculation
1819 */
1820 prop->dmmu.start_addr = prop->dram_base_address +
> 1821 roundup(prop->dram_size, prop->dram_page_size);
1822
1823 prop->dmmu.end_addr = prop->dmmu.start_addr + prop->dram_page_size *
1824 div_u64((VA_HBM_SPACE_END - prop->dmmu.start_addr), prop->dmmu.page_size);
1825
1826 return 0;
1827 }
1828

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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