seccomp: add arch_prctl syscall for amx - #7518
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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]>
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Is this syscall called by libc? Who causes the syscall? That is not fully clear to me. |
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It's called by CpuManager::new() : cloud-hypervisor/vmm/src/cpu.rs Line 801 in e7cda17 |
phip1611
approved these changes
Nov 26, 2025
rbradford
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Nov 26, 2025
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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]