mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-03 04:46:56 +07:00
b16d8c231e
Building a 32-bit kernel with CONFIG_X86_USE_3DNOW and CONFIG_EFI_STUB leads to the following build error, drivers/firmware/efi/libstub/lib.a(efi-stub-helper.o): In function `efi_relocate_kernel': efi-stub-helper.c:(.text+0xda5): undefined reference to `_mmx_memcpy' This is due to the fact that the EFI boot stub pulls in the 3DNow optimized versions of the memcpy() prototype from arch/x86/include/asm/string_32.h, even though the _mmx_memcpy() implementation isn't available in the EFI stub. For now, predicate CONFIG_EFI_STUB on !CONFIG_X86_USE_3DNOW. This is most definitely a temporary fix. A complete solution will involve selectively including kernel headers/symbols into the early-boot execution environment of the EFI boot stub, i.e. something analogous to the way that the _SETUP symbol is used. Previous attempts have been made to fix this kind of problem, though none seem to have ever been merged, http://lkml.kernel.org/r/20120329104822.GA17233@x1.osrc.amd.com Clearly, this problem has been around for a long time. Reported-by: Ingo Molnar <mingo@kernel.org> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Link: http://lkml.kernel.org/r/1407193939-27813-1-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> |
||
|---|---|---|
| .. | ||
| alpha | ||
| arc | ||
| arm | ||
| arm64 | ||
| avr32 | ||
| blackfin | ||
| c6x | ||
| cris | ||
| frv | ||
| hexagon | ||
| ia64 | ||
| m32r | ||
| m68k | ||
| metag | ||
| microblaze | ||
| mips | ||
| mn10300 | ||
| openrisc | ||
| parisc | ||
| powerpc | ||
| s390 | ||
| score | ||
| sh | ||
| sparc | ||
| tile | ||
| um | ||
| unicore32 | ||
| x86 | ||
| xtensa | ||
| .gitignore | ||
| Kconfig | ||