Does not work when the Secure Boot is enabled (failed to get I/O permission)

[szydell]

Distribution (run cat /etc/os-release):
NAME="Fedora Linux"
VERSION="39 (KDE Plasma)"
ID=fedora
VERSION_ID=39
VERSION_CODENAME=""
PLATFORM_ID="platform:f39"
PRETTY_NAME="Fedora Linux 39 (KDE Plasma)"

Related Application and/or Package Version (run apt policy $PACKAGE NAME):
Current version from the GitHub packaged for Fedora.

Issue/Bug Description:
[root@ ~]# system76-firmware-daemon
system76-firmware-daemon: failed to get I/O permission: Operation not permitted (os error 1)

The issue is related to Secure Boot and kernel lockdown. I was able to reproduce it and found a workaround. With the disabled secure boot, it works ok again.

As written in the man (https://man7.org/linux/man-pages/man2/iopl.2.html) usage of iopl is deprecated. Maybe there is a way to rewrite this part? :)

    if unsafe { libc::iopl(3) } < 0 {
        return Err(format!(
            "failed to get I/O permission: {}",
            io::Error::last_os_error()
        ));
    }

Steps to reproduce (if you know):
You can just run it on a system with enabled Secure Boot.

Expected behavior:
Run also on systems with enabled Secure Boot.

Other Notes:
Originally reported as an issue for Fedora copr package here: https://pagure.io/system76/system76-firmware/issue/1

[s373r]

I have the exact same problem

[JLeemaster]

Same here

[tunix]

Any chance that this may get fixed soon?