On Mon, Jul 13, 2020 at 03:44:16PM +0100, Jon Hunter wrote: > On 13/07/2020 15:39, Zhenyu Ye wrote: > > On 2020/7/13 22:27, Jon Hunter wrote: > >> After this change I am seeing the following build errors ... > >> > >> /tmp/cckzq3FT.s: Assembler messages: > >> /tmp/cckzq3FT.s:854: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x7' > >> /tmp/cckzq3FT.s:870: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x7' > >> /tmp/cckzq3FT.s:1095: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x7' > >> /tmp/cckzq3FT.s:1111: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x7' > >> /tmp/cckzq3FT.s:1964: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x7' > >> /tmp/cckzq3FT.s:1980: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x7' > >> /tmp/cckzq3FT.s:2286: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x7' > >> /tmp/cckzq3FT.s:2302: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x7' > >> /tmp/cckzq3FT.s:4833: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x6' > >> /tmp/cckzq3FT.s:4849: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x6' > >> /tmp/cckzq3FT.s:5090: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x6' > >> /tmp/cckzq3FT.s:5106: Error: unknown or missing operation name at operand 1 -- `tlbi rvae1is,x6' > >> /tmp/cckzq3FT.s:874: Error: attempt to move .org backwards > >> /tmp/cckzq3FT.s:1115: Error: attempt to move .org backwards > >> /tmp/cckzq3FT.s:1984: Error: attempt to move .org backwards > >> /tmp/cckzq3FT.s:2306: Error: attempt to move .org backwards > >> /tmp/cckzq3FT.s:4853: Error: attempt to move .org backwards > >> /tmp/cckzq3FT.s:5110: Error: attempt to move .org backwards > >> scripts/Makefile.build:280: recipe for target 'arch/arm64/mm/hugetlbpage.o' failed > >> make[3]: *** [arch/arm64/mm/hugetlbpage.o] Error 1 > >> scripts/Makefile.build:497: recipe for target 'arch/arm64/mm' failed > >> make[2]: *** [arch/arm64/mm] Error 2 > > > > The code must be built with binutils >= 2.30. > > Maybe I should add a check on whether binutils supports ARMv8.4-a instructions... > > Yes I believe so. The binutils guys in Arm confirmed that assembling "tlbi rvae1is" without -march=armv8.4-a is a bug. When it gets fixed, checking for the binutils version is not sufficient without passing -march. I think we are better off with a manual encoding of the instruction. -- Catalin
