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.
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.
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
