Re: gcc: error: unrecognized command-line option '-mharden-sls=all'
On Thu, 2022-04-21 at 11:50 -0500, Justin Forbes wrote:
On Thu, Apr 21, 2022 at 8:58 AM Sérgio Basto
<sergio(a)serjux.com> wrote:
>
> Hi,
>
> to test Virtualbox host kmods on new kernel (x86_64 only), I install
> fedora-rawhide-kernel-nodebug [1]
>
> but last two update I see with ack SLS [2] but SLS is strict arm
> thing
> , this is a bug ? or I'm missing something ?
SLS is not a strict arm thing, and upstream commit e463a09af2f06
brought in the Straight Line Speculation mitigations for x86. Those
are also enabled in 5.17 kernels as well.
I assume you are running the rawhide-nodebug kernel on rawhide? If so,
it should work, but it is entirely possible that the virtualbox
drivers just do not build against the 5.18 development kernels yet.
It would be best to ask them for support. If you are trying to build
against the rawhide-nodebug kernel on a stable Fedora release, that
will not work. You would need to rebuild the kernel first..
I'm using Fedora 34 , so you are saying that we need a higher gcc
version isn't it ?
after install kernel-devel , I need do some magic like:
cd /usr/src/kernels/5.18.0-0.rc3.27.fc37.x86_64
vi tools/objtool/Makefile
remove @$(CONFIG_SHELL) ./sync-check.sh from line 55 of
tools/objtool/Makefile
rm scripts/basic/fixdep
rm scripts/mod/mk_elfconfig
rm tools/bpf/resolve_btfids//fixdep
rm tools/objtool/fixdep
make clean
make tools/objtool
make scripts
rm scripts/mod/modpost
make
Justin
> Thank you
>
> [2]
> .config
> 347:CONFIG_CC_HAS_SLS=y
> 348:CONFIG_SLS=y
>
> [1]
> dnf --disablerepo='*' --enablerepo=fedora-rawhide-kernel-nodebug
> update
>
>
> --
> Sérgio M. B.
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--
Sérgio M. B.