As a complement of information, here are the messages pertaining to the TLB during the log :
$ grep -i tlb swiotlb_crash.out [ 0.003802] software IO TLB: SWIOTLB bounce buffer size adjusted to 1024MB [ 0.037784] kvm-guest: KVM setup pv remote TLB flush [ 0.040674] software IO TLB: Cannot allocate buffer [ 0.229918] Last level iTLB entries: 4KB 512, 2MB 255, 4MB 127 [ 0.230877] Last level dTLB entries: 4KB 512, 2MB 255, 4MB 127, 1GB 0 [ 0.322941] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages [ 0.324641] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 0.799064] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) [ 0.800761] software IO TLB: No low mem [ 1.251773] Kernel panic - not syncing: Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer [ 1.258821] swiotlb_tbl_map_single.cold+0x57/0x7c [ 1.259750] swiotlb_map+0x61/0x240 [ 1.289795] ---[ end Kernel panic - not syncing: Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer ]--- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1955655 Title: kernel-5.13.0-23-generic : Unable to boot when Secure Encrypted Virtualization( SEV) is enabled without setting swiotlb boot param To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1955655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
