Recent tests with the most recent 5.15 kernel (5.15.0-25-generic) do
display the same problem, though the symptom is different.

Booting w/o the swiotlb=262144 leads to the boot sequence stopping after
these messages :

[    1.376749] i2c i2c-0: Memory type 0x07 not supported yet, not instantiating 
SPD
[    1.379840] cryptd: max_cpu_qlen set to 1000
[    1.381359] scsi host1: ahci
[    1.384854] AVX2 version of gcm_enc/dec engaged.
[    1.385579] AES CTR mode by8 optimization enabled
[    1.386280] scsi host2: ahci
[    1.387162] scsi host3: ahci
[    1.387659] scsi host4: ahci
[    1.388141] scsi host5: ahci
[    1.388675] scsi host6: ahci
[    1.389091] ata1: SATA max UDMA/133 abar m4096@0x91000000 port 0x91000100 
irq 36
[    1.389937] ata2: SATA max UDMA/133 abar m4096@0x91000000 port 0x91000180 
irq 36
[    1.390787] ata3: SATA max UDMA/133 abar m4096@0x91000000 port 0x91000200 
irq 36
[    1.391599] ata4: SATA max UDMA/133 abar m4096@0x91000000 port 0x91000280 
irq 36
[    1.392417] ata5: SATA max UDMA/133 abar m4096@0x91000000 port 0x91000300 
irq 36
[    1.393251] ata6: SATA max UDMA/133 abar m4096@0x91000000 port 0x91000380 
irq 36
[    1.707933] ata3: SATA link down (SStatus 0 SControl 300)
[    1.709684] ata4: SATA link down (SStatus 0 SControl 300)
[    1.711379] ata5: SATA link down (SStatus 0 SControl 300)
[    1.712945] ata2: SATA link down (SStatus 0 SControl 300)
[    1.714405] ata1: SATA link down (SStatus 0 SControl 300)
[    1.715926] ata6: SATA link down (SStatus 0 SControl 300)
[    3.352937] pcieport 0000:00:1e.0: pciehp: Slot(0): No device found
[    3.356935] pcieport 0000:00:1e.2: pciehp: Slot(2): No device found
[    3.368942] pcieport 0000:00:1e.1: pciehp: Slot(1): No device found
[    3.368958] pcieport 0000:00:1e.3: pciehp: Slot(3): No device found
[    3.384970] pcieport 0000:00:1e.4: pciehp: Slot(4): No device found
[    3.384991] pcieport 0000:00:1e.6: pciehp: Slot(6): No device found
[    3.396926] pcieport 0000:00:1e.5: pciehp: Slot(5): No device found
[    3.396957] pcieport 0000:00:1e.7: pciehp: Slot(7): No device found

And after a period of time we start seeing  :
[  242.880954] INFO: task kworker/u16:0:8 blocked for more than 120 seconds.    
                                                                                
                                                                                
                                
[  242.882063]       Not tainted 5.15.0-25-generic #25-Ubuntu                   
                                                                                
                                                                                
                                
[  242.882895] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.                                                                        
                                                                                
                                
[  242.884165] task:kworker/u16:0   state:D stack:    0 pid:    8 ppid:     2 
flags:0x00004000                                                                
                                                                                
                                  
[  242.885520] Workqueue: events_unbound async_run_entry_fn                     
                                                                                
                                                                                
                                
[  242.886383] Call Trace:                                                      
                                                                                
                                                                                
                                
[  242.886783]  <TASK>                                                          
                                                                                
                                                                                
                                
[  242.887133]  __schedule+0x23d/0x590                                          
                                                                                
                                                                                
                                
[  242.887716]  schedule+0x4e/0xb0                                              
                                                                                
                                                                                
                                
[  242.888221]  async_synchronize_cookie_domain+0xcc/0x110                      
                                                                                
                                                                                
                                
[  242.889077]  ? wait_woken+0x70/0x70                                          
                                                                                
                                                                                
                                
[  242.889637]  async_synchronize_cookie+0x15/0x20                              
                                                                                
                                                                                
                                
[  242.890355]  async_port_probe+0x4e/0x80                                      
                                                                                
                                                                                
                                
[  242.890996]  async_run_entry_fn+0x33/0x120                                   
                                                                                
                                                                                
                                
[  242.891677]  process_one_work+0x22b/0x3d0                                    
                                                                                
                                                                                
                                
[  242.892344]  worker_thread+0x53/0x410                                        
                                                                                
                                                                                
                                
[  242.892955]  ? process_one_work+0x3d0/0x3d0                                  
                                                                                
                                                                                
                                
[  242.893653]  kthread+0x12a/0x150                                             
                                                                                
                                                                                
                                
[  242.894189]  ? set_kthread_struct+0x50/0x50                                  
                                                                                
                                                                                
                                
[  242.894835]  ret_from_fork+0x22/0x30                                         
                                                                                
                                                                                
                                
[  242.895393]  </TASK>                                                         
                                                                                
                                                                                
                                
[  242.895780] INFO: task kworker/u16:1:128 blocked for more than 120 seconds.  
                                                                                
                                                                                
                                
[  242.896855]       Not tainted 5.15.0-25-generic #25-Ubuntu                   
                                                                                
                                                                                
                                
[  242.897752] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.                                                                        
                                                                                
                                
[  242.899028] task:kworker/u16:1   state:D stack:    0 pid:  128 ppid:     2 
flags:0x00004000                                                                
                                                                                
                                  
[  242.900346] Workqueue: events_unbound async_run_entry_fn                     
                                                                                
                                                                                
                                
[  242.901208] Call Trace:                                                      
                                                                                
                                                                                
                                
[  242.901633]  <TASK>                                                          
                                                                                
                                                                                
                                
[  242.901965]  __schedule+0x23d/0x590                                          
                                                                                
                                                                                
                                
[  242.902507]  schedule+0x4e/0xb0                                              
                                                                                
                                                                                
                                
[  242.903004]  async_synchronize_cookie_domain+0xcc/0x110                      
                                                                                
                                                                                
                                
[  242.903837]  ? wait_woken+0x70/0x70                                          
                                                                                
                                                                                
                                
[  242.904414]  async_synchronize_cookie+0x15/0x20                              
                                                                                
                                                                                
                                
[  242.905178]  async_port_probe+0x4e/0x80                                      
                                                                                
                                                                                
                                
[  242.905826]  async_run_entry_fn+0x33/0x120                                   
                                                                                
                                                                                
                                
[  242.906502]  process_one_work+0x22b/0x3d0                                    
                                                                                
                                                                                
                                
[  242.907173]  worker_thread+0x53/0x410                                        
                                                                                
                                                                                
                                
[  242.907777]  ? process_one_work+0x3d0/0x3d0                                  
                                                                                
                                                                                
                                
[  242.908442]  kthread+0x12a/0x150                                             
                                                                                
                                                                                
                                
[  242.908959]  ? set_kthread_struct+0x50/0x50                                  
                                                                                
                                                                                
                                
[  242.909576]  ret_from_fork+0x22/0x30                                         
                                                                                
                                                                                
                                
[  242.910120]  </TASK>                                                         
                                                                                
                                                                                
                                


** Summary changed:

- KVM flavor of Jammy kernel 5.13 does not boot when Secure Encrypted 
Virtualization( SEV) is enabled
+ Jammy kernel does not boot when Secure Encrypted Virtualization( SEV) is 
enabled

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1955395

Title:
  Jammy kernel does not boot when Secure Encrypted Virtualization( SEV)
  is enabled

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