On Thu, 2022-04-21 at 11:50 -0500, Justin Forbes wrote:

On Thu, Apr 21, 2022 at 8:58 AM Sérgio Basto sergio@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. _______________________________________________ kernel mailing list -- kernel@lists.fedoraproject.org To unsubscribe send an email to kernel-leave@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@lists.fedoraproject.org Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure

On 21.04.22 21:00, Justin Forbes wrote:

On Thu, Apr 21, 2022 at 12:02 PM Sérgio Basto sergio@serjux.com wrote:

...

On Thu, 2022-04-21 at 11:50 -0500, Justin Forbes wrote:

...

On Thu, Apr 21, 2022 at 8:58 AM Sérgio Basto sergio@serjux.com wrote:

...

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 ?

Actually, a newer compiler is not necessary. It would get you past this particular error, but you would just hit another error. The real issue is the compilter used to build the kernel must also be the compiler used to build the module. If you really need to run 5.18 kernels on Fedora 34, and need to build external modules for them, you will have to recompile the kernel yourself on an F34 host.

Shameless plug: or use 5.18 from my vanilla repos, as such problems are the reason why I build kernel packages specifically for each of the supported Fedora releases. The fc34 kernel-vanilla rpms thus were built on fc34:

https://fedoraproject.org/wiki/Kernel_Vanilla_Repositories

CU, knurd