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brundage
Apprentice
Joined: 02 Dec 2004
Posts: 153
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 Posted: Tue Aug 13, 2019 6:13 pm Post subject: UTF charactes in kernel cmdline |
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I'm running 4.19.57-gentoo on a UEFI system without grub and am trying to get the bootloder to pass options to the kernel. I'm getting Asian characters in /proc/cmdline when I do.
Right now I have a kernel with a built in commandline.
| Code: | 0 blaze:0.0 /home/brundage % zgrep CMDLINE /proc/config.gz
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="root=/dev/sda2 pci=noaer intel_iommu=on nvidia-drm.modeset=1"
# CONFIG_CMDLINE_OVERRIDE is not set
# CONFIG_BLK_CMDLINE_PARSER is not set
# CONFIG_CMDLINE_PARTITION is not set
CONFIG_FB_CMDLINE=y
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I've booted with this UEFI entry
| Code: | Boot0002* gentoo-4.19.75 xtra HD(2,GPT,366809d6-3983-4be3-be3e-852e902a962c,0xe1800,0x63fff)/File(\EFI\GENTOO\BZIMAGE-4.19.57.EFI)root=/dev/sda2 pci=noaer intel_iommu=on vfio-pci.ids=8086:1912
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This is currently the contents of /proc/cmdline
| Code: | 1 blaze:0.0 /home/brundage % cat /proc/cmdline
root=/dev/sda2 pci=noaer intel_iommu=on nvidia-drm.modeset=1 潲瑯⼽敤⽶摳㉡瀠楣渽慯牥椠瑮汥楟浯畭漽晶潩瀭楣椮獤㠽㠰㨶㤱㈱
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It appears that the vfio-pci parameters are not passed
| Code: | 0 blaze:0.0 /root # for F in /sys/module/vfio_pci/parameters/*; do
echo $F
cat $F
echo
done
/sys/module/vfio_pci/parameters/disable_idle_d3
N
/sys/module/vfio_pci/parameters/disable_vga
N
/sys/module/vfio_pci/parameters/nointxmask
N
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What's going on here? Thanks. |
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bunder
Bodhisattva
Joined: 10 Apr 2004
Posts: 5947
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| Posted: Tue Aug 13, 2019 6:38 pm Post subject: |
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| Quote: | | It appears that the vfio-pci parameters are not passed |
where did nvidia-drm.modeset come from as well... 
one thing we could try though for the boxes, is to use the -u flag with efibootmgr when making a new entry to force the cmdline to be unicode.
cheers
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| Neddyseagoon wrote: | | The problem with leaving is that you can only do it once and it reduces your influence. |
banned from #gentoo since sept 2017 |
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mike155
Advocate
Joined: 17 Sep 2010
Posts: 4438
Location: Frankfurt, Germany
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brundage
Apprentice
Joined: 02 Dec 2004
Posts: 153
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| Posted: Tue Aug 13, 2019 7:53 pm Post subject: |
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Yep, adding -u to efibootmgr got rid of the characters. Looks like the UEFI parameters are additive to the built-in command line.
Are these periods going to be a problem?
| Code: | Boot0001* gentoo-4.19.57 HD(2,GPT,366809d6-3983-4be3-be3e-852e902a962c,0xe1800,0x63fff)/File(\EFI\GENTOO\BZIMAGE-4.19.57.EFI)r.o.o.t.=./.d.e.v./.s.d.a.2. .i.n.t.e.l._.i.o.m.m.u.=.o.n.
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/proc/cmdline looks okay
| Code: | 1 blaze /home/brundage % cat /proc/cmdline
root=/dev/sda2 root=/dev/sda2 intel_iommu=on
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bunder
Bodhisattva
Joined: 10 Apr 2004
Posts: 5947
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| Posted: Tue Aug 13, 2019 8:42 pm Post subject: |
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the periods are fine, my systems do the same thing, i think its because unicode is represented differently or something.
i forgot about that thread too. i thought this sounded familiar 
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| Neddyseagoon wrote: | | The problem with leaving is that you can only do it once and it reduces your influence. |
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Hu
Administrator
Joined: 06 Mar 2007
Posts: 23088
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| Posted: Wed Aug 14, 2019 1:21 am Post subject: |
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| For completeness: the non-English characters shown, when dumped as hex, byte-swapped, and reloaded as individual 8-bit characters rather than as 16-bit characters, match the expected command line set by efibootmgr. |
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