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author | Palmer Dabbelt <palmer@rivosinc.com> | 2022-10-28 01:09:50 +0300 |
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committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-10-28 01:14:07 +0300 |
commit | 952b64d6665c8b6fdd13ba63be7adc3be51641d7 (patch) | |
tree | 12078f7d8c71c2c8920361a59274d0d9d7f2c48b /usr | |
parent | 9f2ac64d6ca60db99132e08628ac2899f956a0ec (diff) | |
parent | aae538cd03bc8fc35979653d9180922d146da0ca (diff) | |
download | linux-952b64d6665c8b6fdd13ba63be7adc3be51641d7.tar.xz |
Merge patch series "Fix RISC-V toolchain extension support detection"
Conor Dooley <conor@kernel.org> says:
From: Conor Dooley <conor.dooley@microchip.com>
This came up due to a report from Kevin @ kernel-ci, who had been
running a mixed configuration of GNU binutils and clang. Their compiler
was relatively recent & supports Zicbom but binutils @ 2.35.2 did not.
Our current checks for extension support only cover the compiler, but it
appears to me that we need to check both the compiler & linker support
in case of "pot-luck" configurations that mix different versions of
LD,AS,CC etc.
Linker support does not seem possible to actually check, since the ISA
string is emitted into the object files - so I put in version checks for
that. The checks have gotten a bit ugly since 32 & 64 bit support need
to be checked independently but ahh well.
As I was going, I fell into the trap of there being duplicated checks
for CC support in both the Makefile and Kconfig, so as part of renaming
the Kconfig symbol to TOOLCHAIN_HAS_FOO, I dropped the extra checks in
the Makefile. This has the added advantage of the TOOLCHAIN_HAS_FOO
symbol for Zihintpause appearing in .config.
I pushed out a version of this that specificly checked for assember
support for LKP to test & it looked /okay/ - but I did some more testing
today and realised that this is redudant & have since dropped the as
check.
I tested locally with a fair few different combinations, to try and
cover each of AS, LD, CC missing support for the extension.
* b4-shazam-merge:
riscv: fix detection of toolchain Zihintpause support
riscv: fix detection of toolchain Zicbom support
Link: https://lore.kernel.org/r/20221006173520.1785507-1-conor@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'usr')
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