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[Xen-devel] ARM64:Porting xen to new hardware


  • To: xen-devel@xxxxxxxxxxxxx
  • From: bharat gohil <ghl.bhrt@xxxxxxxxx>
  • Date: Tue, 29 Aug 2017 19:51:57 +0530
  • Delivery-date: Tue, 29 Aug 2017 14:22:05 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

Hello All

I am trying to run Xen on new hardware which has two A35 and one A72 core.
Xen booted intially but it hangs at smp_call_function(setup_virt_paging_one, (void *)val, 1) function call.
Find following log of Xen booting,

- UART enabled -                                                               
- CPU 00000000 booting -                                                       
- Current EL 00000008 -                                                        
- Xen starting at EL2 -                                                        
- Zero BSS -                                                                   
- Setting up control registers -                                               
- Turning on paging -                                                          
- Ready -                                                                      
(XEN) Checking for initrd in /chosen                                           
(XEN) RAM: 0000000040000000 - 00000000bfffffff                                 
(XEN)                                                                          
(XEN) MODULE[0]: 0000000044000000 - 000000004400fd5a Device Tree               
(XEN)                                                                          
(XEN) Command line: <NULL>                                                     
(XEN) Placing Xen at 0x00000000bfe00000-0x00000000c0000000                     
(XEN) Update BOOTMOD_XEN from 0000000040080000-0000000040194e01 => 00000000bfe01
(XEN) Domain heap initialised                                                  
(XEN) Booting using Device Tree                                                
(XEN) Platform: Generic System                                                 
(XEN) Taking dtuart configuration from /chosen/stdout-path                     
(XEN) Looking for dtuart at "serial0", options ""                              
 __  __            _  _    _  ___                     _        _     _         
 \ \/ /___ _ __   | || |  / |/ _ \    _   _ _ __  ___| |_ __ _| |__ | | ___    
  \  // _ \ '_ \  | || |_ | | | | |__| | | | '_ \/ __| __/ _` | '_ \| |/ _ \   
  /  \  __/ | | | |__   _|| | |_| |__| |_| | | | \__ \ || (_| | |_) | |  __/   
 /_/\_\___|_| |_|    |_|(_)_|\___/    \__,_|_| |_|___/\__\__,_|_.__/|_|\___|   
                                                                               
(XEN) Xen version 4.10-unstable (bgohil@) (aarch64-linux-gnu-gcc (Ubuntu/Linaro7
(XEN) Latest ChangeSet: Fri Aug 11 19:02:51 2017 +0100 git:9053a74-dirty       
(XEN) Processor: 410fd041: "ARM Limited", variant: 0x0, part 0xd04, rev 0x1    
(XEN) 64-bit Execution:                                                        
(XEN)   Processor Features: 0000000000002222 0000000000000000                  
(XEN)     Exception Levels: EL3:64+32 EL2:64+32 EL1:64+32 EL0:64+32            
(XEN)     Extensions: FloatingPoint AdvancedSIMD                               
(XEN)   Debug Features: 0000000010305106 0000000000000000                      
(XEN)   Auxiliary Features: 0000000000000000 0000000000000000                  
(XEN)   Memory Model Features: 0000000000101122 0000000000000000               
(XEN)   ISA Features:  0000000000011120 0000000000000000                       
(XEN) 32-bit Execution:                                                        
(XEN)   Processor Features: 00000131:00011011                                  
(XEN)     Instruction Sets: AArch32 A32 Thumb Thumb-2 Jazelle                  
(XEN)     Extensions: GenericTimer Security                                    
(XEN)   Debug Features: 03010066                                               
(XEN)   Auxiliary Features: 00000000                                           
(XEN)   Memory Model Features: 10201105 40000000 01260000 02102211             
(XEN)  ISA Features: 02101110 13112111 21232042 01112131 00011142 00011121     
(XEN) Using PSCI-1.0 for SMP bringup                                           
(XEN) SMP: Allowing 3 CPUs                                                     
(XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 13000 KHz                
(XEN) GICv2: WARNING: The GICC size is too small: 0x1000 expected 0x2000       
(XEN) GICv2 initialization:                                                    
(XEN)         gic_dist_addr=0000000010510000                                   
(XEN)         gic_cpu_addr=0000000010520000                                    
(XEN)         gic_hyp_addr=0000000010540000                                    
(XEN)         gic_vcpu_addr=0000000010560000                                   
(XEN)         gic_maintenance_irq=25                                           
(XEN) GICv2: 384 lines, 6 cpus, secure (IID 0200143b).                         
(XEN) Using scheduler: SMP Credit Scheduler (credit)                           
(XEN) Allocated console ring of 32 KiB.                                        
(XEN) Bringing up CPU1                                                         
- CPU 00000001 booting -                                                       
- Current EL 00000008 -                                                        
- Xen starting at EL2 -                                                        
- Setting up control registers -                                               
- Turning on paging -                                                          
- Ready -                                                                      
(XEN) CPU 1 booted.                                                            
(XEN) Bringing up CPU2                                                         
- CPU 00000200 booting -                                                       
- Current EL 00000008 -                                                        
- Xen starting at EL2 -                                                        
- Setting up control registers -                                               
- Turning on paging -                                                          
- Ready -                                                                      
(XEN) CPU 2 booted.                                                            
(XEN) Brought up 3 CPUs                                                        
(XEN) P2M: 40-bit IPA with 40-bit PA and 8-bit VMID                            
(XEN) P2M: 3 levels with order-1 root, VTCR 0x80023558 


Can anyone guide me how to debug this problem or what could be wrong here?

It looks, writing into VTCR_EL2 hang the system.

--
Regards,
Bharat Gohil

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