seccomp: add arch_prctl syscall for amx #7518
Merged
Conversation
This file contains hidden or 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
When enabling amx feature, we should call arch_prctl to request permission to use tile data for guest. The permission should be requested before the first vcpu is created, so we need to call arch_prctl in vmm thread. This patch adds the arch_prctl syscall for vmm_thread_rules. Fixes: cloud-hypervisor#7516 Signed-off-by: Songqian Li <[email protected]>
Member
|
Is this syscall called by libc? Who causes the syscall? That is not fully clear to me. |
Contributor
Author
It's called by CpuManager::new() : cloud-hypervisor/vmm/src/cpu.rs Line 801 in e7cda17 |
phip1611
approved these changes
Nov 26, 2025
rbradford
approved these changes
Nov 26, 2025
Merged
via the queue into
cloud-hypervisor:main
with commit Nov 26, 2025
4138287
42 of 43 checks passed
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 participants
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Outdated suggestions cannot be applied.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.
When enabling amx feature, we should call arch_prctl to request
permission to use tile data for guest. The permission should be
requested before the first vcpu is created, so we need to call
arch_prctl in vmm thread. This patch adds the arch_prctl syscall for
vmm_thread_rules.
Fixes: #7516
Signed-off-by: Songqian Li [email protected]