Implement VirtIO RNG device #70
Open
+362
−1
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This commit introduces the VirtIO entropy device, also known as virtio-rng in QEMU or the Linux kernel. Randomness is a precious resource in the system. Without sufficient entropy, functions like arc4random_buf() in the standard C library may not work properly since they rely on the blocking device /dev/random. Closed sysprog21#68.
|
Can you upload the newly built rootfs.cpio here for quick testing? Thanks! |
You could try this: rootfs.cpio.zip |
jserv
requested changes
Jan 27, 2025
|
I try on machine x86-64, compiled with gcc 12.3.0. Procedure:
Result: Nothing is output (blocked), is it normal? I think the |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Overview
This commit introduces the VirtIO entropy device, also known as
virtio-rngin QEMU and the Linux kernel.Randomness is a precious resource in the system. Without sufficient entropy, functions like arc4random_buf() in the standard C library may not work properly since they rely on the blocking device /dev/random.
Closed #68.
Prerequisites
CONFIG_ODin BusyBox$ cd buildroot/output/build/busybox-1.36.1/ $ make menuconfigrootfs.cpio$ cd semu $ cp -f buildroot/output/images/rootfs.cpio ./Test procedures
semu:cd semu/ make check/dev/randomwithodcommandWithout
virtio-rng, theodcommand will just hang due to the aforementioned issue.