One of my favorite food black sausage aka mustamakkara :-) Anthony Bourdain (RIP) ate this in his show and approved ;-)

I realized today that in order to compile Rust projects you need a ThreadRipper and also my colleague said this to me. A basic laptops literally melts when compiling Rust ;-) It's a programming language that is free but requires 2k - 12k EUR CPU to build anything reasonable.

My colleague also said that as bonus it helps to keep your house warm so I guess it is shopping time...

#rust

This is unfortunate :-/ E.g. main #Fedora repositories don't have rtirq package.

http://ccrma.stanford.edu/planetccrma/software/

5️⃣ Here's the 5th installment of posts highlighting key new features of the upcoming v257 release of systemd.

Since its beginnings systemd was a heavy user of the D-Bus IPC system. It provides D-Bus APIs, it calls D-Bus APIs it schedules activation of the D-Bus broker, and even provides its own C D-Bus client library.

However, since early on our use of D-Bus was not without various major problems. One of the biggest goes something like this:

Hmm... X1 Thinkpad does not have Wifi after waking up from suspend in Fedora 41. #fedora

After trying different approaches of using clangd with kernel my end game is to put O=./clangd for the “clangd build”, which is a host (as target) build with bunch of stuff that you want enable. This makes sense because kernel’s .gitignore has by default .*.

I also learned that for the “real Vim” (not “Gen Z vim”) there is actually quite decent set of plugins to make use of it. Here’s my vim-plug list:

  Plug 'mattn/vim-lsp-settings'
  Plug 'prabirshrestha/asyncomplete-lsp.vim'
  Plug 'prabirshrestha/asyncomplete.vim'
  Plug 'prabirshrestha/vim-lsp'

This is how I would ramp up clangd session while hacking Linux:

make ARCH=x86_64 O=./.clangd x86_64_defconfig
make ARCH=x86_64 O=./.clangd menuconfig
make ARCH=x86_64 O=./.clangd -j`nproc`
scripts/clang-tools/gen_compile_commands.py -d ./.clangd

OpenWRT is great. I run it in my Turris Omnia, which is a great Czech made router that I love so dearly. I also love BuildRoot used to build OpenWRT images, which is IMHO the best embedded build system in the world. The whole no bullshit ecosystem resonates a lot to me really.

Thus, OpenWRT designing their own reference router called OpenWRT One is great news, and have to link the associated LWN article just to promote it:

https://lwn.net/Articles/994961/

#openwrt #buildroot #lwn

https://counterhate.com/research/musk-political-posts-x/

Found a cool fabric brand while cleaning up some old boxes full of all kinds of shit. Have to learn how to sew and attach it to something. #acid #303

Trying to make a new version of my “TPM2 signers” patch set and stumbling into a weird problem.

Here’s the script I’m looking at:

#!/usr/bin/env bash

set -e

PRIMARY=0x81000001

function egress {
  keyctl clear @u
  tpm2_evictcontrol -C o -c $PRIMARY 2> /dev/null
  tpm2_getcap handles-transient
  tpm2_getcap handles-persistent
}
trap egress EXIT

openssl ecparam -name prime256v1 -genkey -noout -out ecc.pem
openssl pkcs8 -topk8 -inform PEM -outform DER -nocrypt -in ecc.pem -out ecc_pkcs8.der

tpm2_createprimary --hierarchy o -G ecc -c owner.txt
tpm2_evictcontrol -c owner.txt $PRIMARY

# EC parameters to TPM2 blob:
tpm2_import -C $PRIMARY -G ecc -i ecc.pem -u tpm2.pub -r tpm2.priv

# TPM2 blob to ASN.1:
tpm2_encodeobject -C $PRIMARY -u tpm2.pub -r tpm2.priv -o tpm2.pem
openssl asn1parse -inform pem -in tpm2.pem -noout -out tpm2.der

# Populate asymmetric keys:
tpm2_ecc_key=`keyctl padd asymmetric "tpm_ecc" @u < tpm2.der`
kernel_ecc_key=`keyctl padd asymmetric "kernel_ecc" @u < ecc_pkcs8.der`

echo "SECRET" > doc.txt

echo TPM2 ECC SIGN
keyctl pkey_sign $tpm2_ecc_key 0 doc.txt hash=sha256 > doc.txt.sig

echo TPM2 VERIFY
keyctl pkey_verify $kernel_ecc_key 0 doc.txt doc.txt.sig

The error message generated is:

keyctl_pkey_verify: Invalid argument

If I verify with the TPM2 ECC key /it will pass, in other words replacing the list statement with:

keyctl pkey_verify $tpm2_ecc_key 0 doc.txt doc.txt.sig hash=sha256

In the final version I’m going to remove signature verification from TPM2 ECC key as that is kind of the point here: sign certificate with a private key protected by TPM and allow any party verify the signature with the known public key.

#linux #kernel #tpm

PR for 6.12-rc7 with a fix for recently reported bug:

1. https://lore.kernel.org/linux-integrity/D5CYH0IJXX72.35A25M1YICZRP@kernel.org/T/#u
2. https://bugzilla.kernel.org/show_bug.cgi?id=219383

This bug for early weeks of the current release cycle has already landed: https://bugzilla.kernel.org/show_bug.cgi?id=219229

Right now that I don't do kernel as my main job I prioritize users instead kernel developers when picking fixes for during the cycle PR's :-) Other fixes can wait until 6.13 PR.

#linux #kernel

The “convenience of LSP” with kernel:

make ARCH=x86_64 O=../linux-tpmdd-clangd x86_64_defconfig
make O=../linux-tpmdd-clangd/ CC="ccache gcc" -j`nproc`
scripts/clang-tools/gen_compile_commands.py -d ../linux-tpmdd-clangd

This is least distracting way I’ve found to use it (I use it only with VSCodium when just browsing around):

1. Uses host architecture (target architecture can be “whatever”).
2. Uses defconfig that works well for this task.
3. Does not disturb other uses of the Git tree.

E.g. I use LINUX_OVERRIDE_SRCDIR a lot with BuildRoot and usually clean kernel directory in such cases causes least troubles…

my main hardware test platform for Linux kernel. spot the tpm chip 🙂 #linux #kernel

"I can replace you lazy fucks with spicy autocomplete."

"More than a quarter of all new code at Google is generated by AI, then reviewed and accepted by engineers," CEO Sundar Pichai said on the company's third quarter 2024 earnings call. If you work...
https://jwz.org/b/ykb8

Midnight Commander is still the best file manager thanks to '--printwd', which writes the last seen working directory to a file. This amazes me because it is a feature that requires almost nothing to implement.

For Trenchboot: https://lore.kernel.org/linux-integrity/20241102013716.1036396-1-jarkko@kernel.org/

#linux #kernel

was interesting read:

https://lwn.net/Articles/995196/

First system upgrade ever I’ve tried for Asahi Linux ongoing *fingers crossed* (40 to 41)

Learned how to install a “VSCode only” extension to VSCodium:

1. Go to a page: https://marketplace.visualstudio.com/items?itemName=nordic-semiconductor.nrf-kconfig
2. Download vsix.
3. codium --install-extension nordic-semiconductor.nrf-kconfig-2024.9.20.vsix

Now Kconfig looks pretty ;-)

Why only Apple laptops have an 3,5mm audio port that is of super sonic quality?

All other audio ports suck. It's the literal truth. It's the killer feature in Apple products.

Try to connect your Thinkpad directly to a stage sound system and it will be hell. This applies to all PC laptops I've ever tried.

Why it is like this?

I don't have personal laptop at the moment but soon going to get a new one, and it definitely will be Apple laptop, and it is ONLY because of 3,5mm audio port.

Noteworthy is that also the latency metrics of Apple's audio are in par with an external audio interface.

#laptop #audio #apple