Hi Kyrill, On 2019/9/17 19:24, Kyrill Tkachov wrote: > Hi Shaokun, > > On 9/17/19 12:17 PM, Shaokun Zhang wrote: >> Hi aarch64 maintainers, >> >> Sorry to noise you again. >> > No problem :) However, this isn't strictly-speaking a gcc issue because... > > >> We(HiSilicon) next generation CPU core will support "ARMv8.4-TLBI, TLB >> maintenance and TLB range instructions" >> feature, so I try to compile it that tlbi rvae1is is replaced in linux >> kernel which is in my local branch, >> there are some error messages: >> >> /tmp/ccD5TFDe.s: Assembler messages: >> /tmp/ccD5TFDe.s:991: Error: unknown or missing operation name at operand 1 >> -- `tlbi rvae1is,x0' >> /tmp/ccD5TFDe.s:1012: Error: unknown or missing operation name at operand 1 >> -- `tlbi rvae1is,x0' >> /tmp/ccD5TFDe.s:1794: Error: unknown or missing operation name at operand 1 >> -- `tlbi rvae1is,x0' >> /tmp/ccD5TFDe.s:1815: Error: unknown or missing operation name at operand 1 >> -- `tlbi rvae1is,x0' >> /tmp/ccD5TFDe.s:2398: Error: unknown or missing operation name at operand 1 >> -- `tlbi rvae1is,x0' >> /tmp/ccD5TFDe.s:2419: Error: unknown or missing operation name at operand 1 >> -- `tlbi rvae1is,x0' >> /tmp/ccD5TFDe.s:3155: Error: unknown or missing operation name at operand 1 >> -- `tlbi rvae1is,x0' >> /tmp/ccD5TFDe.s:3176: Error: unknown or missing operation name at operand 1 >> -- `tlbi rvae1is,x0' >> /tmp/ccD5TFDe.s:1016: Error: attempt to move .org backwards >> /tmp/ccD5TFDe.s:1819: Error: attempt to move .org backwards >> /tmp/ccD5TFDe.s:2423: Error: attempt to move .org backwards >> /tmp/ccD5TFDe.s:3180: Error: attempt to move .org backwards >> make[2]: *** [arch/arm64/mm/hugetlbpage.o] Error 1 >> make[1]: *** [arch/arm64/mm] Error 2 >> make: *** [sub-make] Error 2 >> > > ... These are assembler messages from gas. > > These system registers should be supported in more recent binutils versions. >
Oh, My poor knowledge on it, thanks your suggestion. I checked it that my binutils version is 2.27-34 which is 3 years ago. > They were added with > https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=793a194839bc8add71fdc7429c58b10f0667a6f6 > > I suggest you update your binutils to a later version to get the support. > It needs 2_30 version which has merged the patch of you sent the link. I will update it:-P Thanks Kyrill, Shaokun > Thanks, > > Kyrill > > >> GCC version is as follow: >> gcc (GCC) 9.2.0 >> Copyright (C) 2019 Free Software Foundation, Inc. >> This is free software; see the source for copying conditions. There is NO >> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. >> >> It seems that GCC doesn't support this new instruction and I checked that >> LLVM has already supported >> this instruction, >> https://github.com/llvm-mirror/llvm/blob/master/lib/Target/AArch64/AArch64SystemOperands.td >> >> So my question is that does GCC have the plan to support this instruction >> recently? >> If not, can you give me some suggestion to do it? I'm not the expert on it >> ;-) >> >> Thanks in advance, >> Shaokun >> > > . >
