Add iopl/ioperm to all linuxes

[espindola]

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[espindola]

@JohnTitor is this ok?

[fslongjin]

This can work well

[espindola]

so, what is the process? I got an email saying @fslongjin approved this, what is next? Do we need another review?

[tgross35]

These are Linux syscalls so should be available everywhere, not just x86. It should probably mirror ioctl and be at least in unix/linux_like/linux/{gnu,musl,android} (near ioctl). Please try this, CI will test the other platforms for you. The semver tests will need to be updated too.

I don't think there is any good reason to add iopl unless you have the xserver usecase, considering it has been deprecated since 2020 mkerrisk/man-pages@6caf6c4.

• https://linux.die.net/man/2/ioperm
• https://man7.org/linux/man-pages/man2/iopl.2.html

@rustbot author

[espindola]

iopl is used by https://github.com/pop-os/system76-firmware

I will try to add this to all platforms.

[espindola]

Since you mentioned ioctl, I have rebased this on top of my other MR so that there is only one place to add these.

[espindola]

These are Linux syscalls so should be available everywhere, not just x86. It should probably mirror ioctl and be at least in unix/linux_like/linux/{gnu,musl,android} (near ioctl). Please try this, CI will test the other platforms for you. The semver tests will need to be updated too.

I just tried, and it looks like it is not available on arm or ppc. OK to leave it as x86_64/i686 only?

[espindola]

so, in summary, iopl is needed, and it can't be declared next to iocl, because it is not available everywhere ioctl is.

[tgross35]

Fyi you can

@rustbot review

To get the labels updated that this is ready for reveiew. I'll take another look.