Re: [PATCH 0/6] iomem cacheability

[Amit Tomer <amittomer25@gmail.com>]

Hi,

> It might be possible to rework Dom0 memory allocation to limit the
> damage or even re-order the binary in memory. Amit, could you post the
> full Xen log with earlyprintk enabled?

Please find XEN logs :

[  229.769854] Starting kernel ...
[  229.773120]
- 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: 0000000048000000 - 000000007fffffff
(XEN) RAM: 0000000500000000 - 000000053fffffff
(XEN) RAM: 0000000600000000 - 000000063fffffff
(XEN) RAM: 0000000700000000 - 000000073fffffff
(XEN)
(XEN) MODULE[0]: 000000007d70f000 - 000000007d722000 Device Tree
(XEN) MODULE[1]: 000000007a000000 - 000000007b800000 Kernel
(XEN)  RESVD[0]: 000000004a000000 - 000000004a013000
(XEN)  RESVD[1]: 000000007d70f000 - 000000007d722000
(XEN)
(XEN) Command line: console=dtuart dom0_mem=2048M
(XEN) Placing Xen at 0x000000073fe00000-0x0000000740000000
(XEN) Update BOOTMOD_XEN from 0000000048000000-0000000048118d81 =>
000000073fe00000-000000073ff18d81
(XEN) PFN compression on bits 19...19
(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 "115200n8"
(XEN) WARNING: UART configuration is not supported
 Xen 4.12-unstable
(XEN) Xen version 4.12-unstable (amit@) (aarch64-linux-gnu-gcc (Linaro
GCC 7.3-2018.05) 7.3.1 20180425 [linaro-7.3-2018.05 revision
d29120a424ecfbc167ef90065c0eeb7f91977701]) debug=y  Fri Mar  8
13:09:49 IST 2019
(XEN) Latest ChangeSet: Thu Mar 7 13:22:10 2019 -0800 git:62617af
(XEN) Processor: 411fd073: "ARM Limited", variant: 0x1, part 0xd07, rev 0x3
(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: 0000000000001124 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 SMC Calling Convention v1.1
(XEN) Using PSCI v1.0
(XEN) SMP: Allowing 8 CPUs
(XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 8333 KHz
(XEN) GICv2 initialization:
(XEN)         gic_dist_addr=00000000f1010000
(XEN)         gic_cpu_addr=00000000f1020000
(XEN)         gic_hyp_addr=00000000f1040000
(XEN)         gic_vcpu_addr=00000000f1060000
(XEN)         gic_maintenance_irq=25
(XEN) GICv2: Adjusting CPU interface base to 0xf102f000
(XEN) GICv2: 512 lines, 8 cpus, secure (IID 0200043b).
(XEN) Using scheduler: SMP Credit Scheduler rev2 (credit2)
(XEN) Initializing Credit2 scheduler
(XEN)  load_precision_shift: 18
(XEN)  load_window_shift: 30
(XEN)  underload_balance_tolerance: 0
(XEN)  overload_balance_tolerance: -3
(XEN)  runqueues arrangement: socket
(XEN)  cap enforcement granularity: 10ms
(XEN) load tracking window length 1073741824 ns
(XEN) Adding cpu 0 to runqueue 0
(XEN)  First cpu on runqueue, activating
(XEN) Allocated console ring of 64 KiB.
(XEN) Bringing up CPU1
- CPU 00000001 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) Adding cpu 1 to runqueue 0
(XEN) CPU 1 booted.
(XEN) Bringing up CPU2
- CPU 00000002 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) Adding cpu 2 to runqueue 0
(XEN) CPU 2 booted.
(XEN) Bringing up CPU3
- CPU 00000003 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) Adding cpu 3 to runqueue 0
(XEN) CPU 3 booted.
(XEN) Bringing up CPU4
- CPU 00000100 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) CPU4 MIDR (0x410fd034) does not match boot CPU MIDR (0x411fd073),
(XEN) disable cpu (see big.LITTLE.txt under docs/).
(XEN) CPU4 never came online
(XEN) Failed to bring up CPU 4 (error -5)
(XEN) Bringing up CPU5
- CPU 00000101 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) CPU5 MIDR (0x410fd034) does not match boot CPU MIDR (0x411fd073),
(XEN) disable cpu (see big.LITTLE.txt under docs/).
(XEN) CPU5 never came online
(XEN) Failed to bring up CPU 5 (error -5)
(XEN) Bringing up CPU6
- CPU 00000102 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) CPU6 MIDR (0x410fd034) does not match boot CPU MIDR (0x411fd073),
(XEN) disable cpu (see big.LITTLE.txt under docs/).
(XEN) CPU6 never came online
(XEN) Failed to bring up CPU 6 (error -5)
(XEN) Bringing up CPU7
- CPU 00000103 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) CPU7 MIDR (0x410fd034) does not match boot CPU MIDR (0x411fd073),
(XEN) disable cpu (see big.LITTLE.txt under docs/).
(XEN) CPU7 never came online
(XEN) Failed to bring up CPU 7 (error -5)
(XEN) Brought up 4 CPUs
(XEN) P2M: 44-bit IPA with 44-bit PA and 8-bit VMID
(XEN) P2M: 4 levels with order-0 root, VTCR 0x80043594
(XEN) I/O virtualisation disabled
(XEN) build-id: d626f521c35090600cb1fa5875a3ca2e55c290c0
(XEN) alternatives: Patching with alt table 00000000002aba18 -> 00000000002ac018
(XEN) CPU0 will call ARM_SMCCC_ARCH_WORKAROUND_1 on exception entry
(XEN) CPU1 will call ARM_SMCCC_ARCH_WORKAROUND_1 on exception entry
(XEN) CPU3 will call ARM_SMCCC_ARCH_WORKAROUND_1 on exception entry
(XEN) CPU2 will call ARM_SMCCC_ARCH_WORKAROUND_1 on exception entry
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Loading kernel from boot module @ 000000007a000000
(XEN) Allocating 1:1 mappings totalling 2048MB for dom0:
(XEN) No bank has been allocated below 4GB.
(XEN) BANK[0] 0x00000500000000-0x00000540000000 (1024MB)
(XEN) BANK[1] 0x00000600000000-0x00000640000000 (1024MB)
(XEN) Grant table range: 0x0000073fe00000-0x0000073fe40000
(XEN) Allocating PPI 16 for event channel interrupt
(XEN) Loading zImage from 000000007a000000 to 0000000500080000-0000000501880000
(XEN) Loading dom0 DTB to 0x0000000508000000-0x00000005080117d0
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Scrubbing free RAM on in background
(XEN) Std. Loglevel: All
(XEN) Guest Loglevel: All
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch
input to Xen)
(XEN) Freed 292kB init memory.
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.14.75-ltsi-yocto-standard (amit@) (gcc
version 7.4.1 20181213 [linaro-7.4-2019.02 revision
56ec6f6b99cc167ff0c2f8e1a2eed33b1edc85d4] (Linaro GCC 7.4-2019.02)) #3
SMP PREEMPT Sun Mar 3 22:22:22 IST9
[    0.000000] Boot CPU: AArch64 Processor [411fd073]
[    0.000000] Machine model: Renesas H3ULCB board based on r8a7795 ES2.0+
[    0.000000] earlycon: xenboot0 at I/O port 0x0 (options '')
[    0.000000] bootconsole [xenboot0] enabled
[    0.000000] Xen 4.12 support found
[    0.000000] efi: Getting EFI parameters from FDT:
[    0.000000] efi: UEFI not found.
[    0.000000] Reserved memory: created CMA memory pool at
0x0000000057000000, size 400 MiB
[    0.000000] OF: reserved mem: initialized node linux,cma@57000000,
compatible id shared-dma-pool
[    0.000000] Reserved memory: created CMA memory pool at
0x0000000070000000, size 256 MiB
[    0.000000] OF: reserved mem: initialized node
linux,multimedia@70000000, compatible id shared-dma-pool
[    0.000000] cma: dma_contiguous_reserve(limit 100000000)
[    0.000000] NUMA: No NUMA configuration found
[    0.000000] NUMA: Faking a node at [mem
0x0000000000000000-0x000000063fffffff]
[    0.000000] NUMA: NODE_DATA [mem 0x63ff90c00-0x63ff926ff]
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x0000000057000000-0x00000000ffffffff]
[    0.000000]   Normal   [mem 0x0000000100000000-0x000000063fffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000057000000-0x000000007fffffff]
[    0.000000]   node   0: [mem 0x0000000500000000-0x000000053fffffff]
[    0.000000]   node   0: [mem 0x0000000600000000-0x000000063fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000057000000-0x000000063fffffff]
[    0.000000] On node 0 totalpages: 692224
[    0.000000]   DMA zone: 2624 pages used for memmap
[    0.000000]   DMA zone: 0 pages reserved
[    0.000000]   DMA zone: 167936 pages, LIFO batch:31
[    0.000000]   Normal zone: 8192 pages used for memmap
[    0.000000]   Normal zone: 524288 pages, LIFO batch:31
[    0.000000] bootmem alloc of 64 bytes failed!
[    0.000000] Kernel panic - not syncing: Out of memory
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted
4.14.75-ltsi-yocto-standard #3
[    0.000000] Hardware name: Renesas H3ULCB board based on r8a7795 ES2.0+ (DT)
[    0.000000] Call trace:
[    0.000000] [<ffff000008089ae8>] dump_backtrace+0x0/0x3c0
[    0.000000] [<ffff000008089ebc>] show_stack+0x14/0x20
[    0.000000] [<ffff000008af20e8>] dump_stack+0x9c/0xbc
[    0.000000] [<ffff0000080ce770>] panic+0x11c/0x28c
[    0.000000] [<ffff0000090478fc>] free_bootmem_late+0x0/0x7c
[    0.000000] [<ffff000009047d90>] __alloc_bootmem_low+0x2c/0x38
[    0.000000] [<ffff0000090329fc>] setup_arch+0x258/0x4d8
[    0.000000] [<ffff00000903083c>] start_kernel+0x64/0x3ac
[    0.000000] ---[ end Kernel panic - not syncing: Out of memory

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