Date: Thu, 07 Mar 2024 20:44:57 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 277559] kldload vmm sometimes hangs kernel on arm64 Message-ID: <bug-277559-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D277559 Bug ID: 277559 Summary: kldload vmm sometimes hangs kernel on arm64 Product: Base System Version: 15.0-CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: jfc@mit.edu On my RockPro64 "kldload vmm" sometimes hangs the system so hard I can't ev= en enter DDB with a break on the serial console. The smp_rendezvous call in vmops_modinit appears to be the culprit according to some debugging printfs= I added. printf("vmmops_modinit rendezvous %p {%lx, %lx}\n", &el2_regs, el2_regs.tcr_el2, el2_regs.vtcr_el2); pause("vmmon", 20); // let console output queue drain smp_rendezvous(NULL, arm_setup_vectors, NULL, &el2_regs); printf("vmmops_modinit rendezvous returned\n"); pause("vmmon", 20); // let console output queue drain The last line on the console when it hangs is vmmops_modinit rendezvous 0xffff0000a5b9d380 {80823510, 80023559} The RockPro64 has 4 Cortex-A53 and 2 Cortex A-72 processors, same clock spe= ed but different performance. According to other printfs I added to vmmops_modinit, ID_AA64MMFR0_EL1 =3D 1122 vmm_virt_bits =3D 39 Most of the time the vmm module loads. About 10% of the time it hangs. --=20 You are receiving this mail because: You are the assignee for the bug.=
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