Hi all, I'm working on improving the emulation of qemu-system-sparc64, and one of the things I'm trying to do is get a framebuffer up and running which means switching from serial keyboard/mouse devices over to PS/2 devices currently used in QEMU. Currently I'm setting up the DT based upon the tree at http://irtfweb.ifa.hawaii.edu/~spex/computers/spex1/techdocs/111211-guidedog-failed/bigdog.prtconf.txt and currently the nodes in OpenBIOS look like this: 0 > cd /pci/ebus/8042 ok 0 > ls ffe2f388 kb_ps2@0 ffe2f6e0 kdmouse@1 ok 0 > .properties device_type "8042" name "8042" reg 00000014 00000060 00000008 00000014 00000060 00000008 #address-cells 1 #size-cells 0 interrupts -- 8 : 00 00 00 01 00 00 00 02 ok 0 > cd kb_ps2 ok 0 > .properties name "kb_ps2" device_type "serial" reg 00000000 keyboard ffffffff address 60 ok 0 > cd .. ok 0 > cd kdmouse ok 0 > .properties name "kdmouse" device_type "mouse" reg 00000001 mouse ffffffff address 60 ok It seems that with these nodes enabled in the DT, I get a kernel panic on boot: [ 0.000000] PROMLIB: Sun IEEE Boot Prom 'OBP 3.10.24 1999/01/01 01:01' [ 0.000000] PROMLIB: Root node compatible: sun4u [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Initializing cgroup subsys cpuacct [ 0.000000] Linux version 4.1.0-rc5+ (build@kentang) (gcc version 5.1.0 (GCC) ) #3 SMP Sat Aug 1 18:15:57 BST 2015 [ 0.000000] bootconsole [earlyprom0] enabled [ 0.000000] ARCH: SUN4U [ 0.000000] Ethernet address: 52:54:00:12:34:56 [ 0.000000] MM: PAGE_OFFSET is 0xfffff80000000000 (max_phys_bits == 40) [ 0.000000] MM: VMALLOC [0x0000000100000000 --> 0x0000060000000000] [ 0.000000] MM: VMEMMAP [0x0000060000000000 --> 0x00000c0000000000] [ 0.000000] Kernel: Using 2 locked TLB entries for main kernel image. [ 0.000000] Remapping the kernel... done. [ 0.000000] OF stdout device is: /pci@1fe,0/ebus@3/su [ 0.000000] PROM: Built device tree with 54608 bytes of memory. [ 0.000000] Top of RAM: 0xfe80000, Total RAM: 0xfe80000 [ 0.000000] Memory hole size: 0MB [ 0.000000] Allocated 16384 bytes for kernel page tables. [ 0.000000] Zone ranges: [ 0.000000] DMA empty [ 0.000000] Normal [mem 0x0000000000000000-0x000000000fe7ffff] [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fe7ffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fe7ffff] [ 0.000000] Booting Linux... [ 0.000000] CPU CAPS: [flush,stbar,swap,muldiv,v9,mul32,div32,v8plus] [ 0.000000] CPU CAPS: [vis] [ 0.000000] PERCPU: Embedded 9 pages/cpu @fffff8000f800000 s32384 r8192 d33152 u4194304 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32321 [ 0.000000] Kernel command line: [ 0.000000] PID hash table entries: 1024 (order: 0, 8192 bytes) [ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 262144 bytes) [ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 131072 bytes) [ 0.000000] Sorting __ex_table... [ 0.000000] Memory: 244976K/260608K available (4046K kernel code, 460K rwdata, 1288K rodata, 264K init, 628K bss, 15632K reserved, 0K cma-reserved) [ 0.000000] Hierarchical RCU implementation. [ 0.000000] RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1. [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1 [ 0.000000] NR_IRQS:2048 nr_irqs:2048 1 [ 5.162048] clocksource tick: mask: 0xffffffffffffffff max_cycles: 0x171024e7e0, max_idle_ns: 440795205315 ns [ 5.163050] clocksource: mult[a000000] shift[24] [ 5.163853] clockevent: mult[1999999a] shift[32] [ 5.168727] Console: colour dummy device 80x25 [ 5.171411] console [tty0] enabled [ 5.172458] bootconsole [earlyprom0] disabled [ 0.000000] PROMLIB: Sun IEEE Boot Prom 'OBP 3.10.24 1999/01/01 01:01' [ 0.000000] PROMLIB: Root node compatible: sun4u [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Initializing cgroup subsys cpuacct [ 0.000000] Linux version 4.1.0-rc5+ (build@kentang) (gcc version 5.1.0 (GCC) ) #3 SMP Sat Aug 1 18:15:57 BST 2015 [ 0.000000] bootconsole [earlyprom0] enabled [ 0.000000] ARCH: SUN4U [ 0.000000] Ethernet address: 52:54:00:12:34:56 [ 0.000000] MM: PAGE_OFFSET is 0xfffff80000000000 (max_phys_bits == 40) [ 0.000000] MM: VMALLOC [0x0000000100000000 --> 0x0000060000000000] [ 0.000000] MM: VMEMMAP [0x0000060000000000 --> 0x00000c0000000000] [ 0.000000] Kernel: Using 2 locked TLB entries for main kernel image. [ 0.000000] Remapping the kernel... done. [ 0.000000] OF stdout device is: /pci@1fe,0/ebus@3/su [ 0.000000] PROM: Built device tree with 54608 bytes of memory. [ 0.000000] Top of RAM: 0xfe80000, Total RAM: 0xfe80000 [ 0.000000] Memory hole size: 0MB [ 0.000000] Allocated 16384 bytes for kernel page tables. [ 0.000000] Zone ranges: [ 0.000000] DMA empty [ 0.000000] Normal [mem 0x0000000000000000-0x000000000fe7ffff] [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fe7ffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fe7ffff] [ 0.000000] Booting Linux... [ 0.000000] CPU CAPS: [flush,stbar,swap,muldiv,v9,mul32,div32,v8plus] [ 0.000000] CPU CAPS: [vis] [ 0.000000] PERCPU: Embedded 9 pages/cpu @fffff8000f800000 s32384 r8192 d33152 u4194304 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32321 [ 0.000000] Kernel command line: [ 0.000000] PID hash table entries: 1024 (order: 0, 8192 bytes) [ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 262144 bytes) [ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 131072 bytes) [ 0.000000] Sorting __ex_table... [ 0.000000] Memory: 244976K/260608K available (4046K kernel code, 460K rwdata, 1288K rodata, 264K init, 628K bss, 15632K reserved, 0K cma-reserved) [ 0.000000] Hierarchical RCU implementation. [ 0.000000] RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1. [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1 [ 0.000000] NR_IRQS:2048 nr_irqs:2048 1 [ 5.162048] clocksource tick: mask: 0xffffffffffffffff max_cycles: 0x171024e7e0, max_idle_ns: 440795205315 ns [ 5.163050] clocksource: mult[a000000] shift[24] [ 5.163853] clockevent: mult[1999999a] shift[32] [ 5.168727] Console: colour dummy device 80x25 [ 5.171411] console [tty0] enabled [ 5.172458] bootconsole [earlyprom0] disabled [ 5.251704] Calibrating delay using timer specific routine.. 203.87 BogoMIPS (lpj=407757) [ 5.251937] pid_max: default: 32768 minimum: 301 [ 5.252768] Security Framework initialized [ 5.254079] AppArmor: AppArmor disabled by boot time parameter [ 5.254432] Mount-cache hash table entries: 1024 (order: 0, 8192 bytes) [ 5.254493] Mountpoint-cache hash table entries: 1024 (order: 0, 8192 bytes) [ 5.263099] Initializing cgroup subsys blkio [ 5.263198] Initializing cgroup subsys devices [ 5.263308] Initializing cgroup subsys freezer [ 5.263396] Initializing cgroup subsys net_cls [ 5.263479] Initializing cgroup subsys perf_event [ 5.279949] Brought up 1 CPUs [ 5.288186] devtmpfs: initialized [ 5.291985] Performance events: No support for PMU type 'ultra12' [ 5.294785] clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns [ 5.310345] NET: Registered protocol family 16 [ 5.327377] /pci@1f,0: PCI IO[1fe02000000] MEM[1ff00100000] [ 5.327585] /pci@1f,0: Unable to request IOMMU resource. [ 5.327655] /pci@1f,0: SABRE PCI Bus Module ver[0:0] [ 5.327730] PCI: Scanning PBM /pci@1f,0 [ 5.328662] sabre ffe2b5a8: PCI host bridge to bus 0000:00 [ 5.329078] pci_bus 0000:00: root bus resource [io 0x1fe02000000-0x1fe0200ffff] (bus address [0x0000-0xffff]) [ 5.329186] pci_bus 0000:00: root bus resource [mem 0x1ff00100000-0x1ff100fffff] (bus address [0x00000000-0x0fffffff]) [ 5.329364] pci_bus 0000:00: root bus resource [bus 00-02] [ 5.336339] pci 0000:00:01.0: can't claim BAR 13 [io 0x1000000-0x1fffff]: no compatible bridge window [ 5.336458] pci 0000:00:01.1: can't claim BAR 13 [io 0x1000000-0x1fffff]: no compatible bridge window [ 5.358945] vgaarb: setting as boot device: PCI:0000:00:02.0 [ 5.359164] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none [ 5.359292] vgaarb: loaded [ 5.359382] vgaarb: bridge control possible 0000:00:02.0 [ 5.367024] /pci@1f,0/ebus@3/eeprom@14,2000: Mostek regs at 0x1fe02006000 [ 5.369048] Switched to clocksource tick [ 5.436155] NET: Registered protocol family 2 [ 5.441114] TCP established hash table entries: 2048 (order: 1, 16384 bytes) [ 5.441293] TCP bind hash table entries: 2048 (order: 2, 32768 bytes) [ 5.441451] TCP: Hash tables configured (established 2048 bind 2048) [ 5.442409] UDP hash table entries: 256 (order: 0, 8192 bytes) [ 5.442569] UDP-Lite hash table entries: 256 (order: 0, 8192 bytes) [ 5.444078] NET: Registered protocol family 1 [ 5.452357] futex hash table entries: 256 (order: 1, 16384 bytes) [ 5.453130] audit: initializing netlink subsys (disabled) [ 5.453874] audit: type=2000 audit(0.280:1): initialized [ 5.457471] HugeTLB registered 8 MB page size, pre-allocated 0 pages [ 5.459739] VFS: Disk quotas dquot_6.6.0 [ 5.459973] VFS: Dquot-cache hash table entries: 1024 (order 0, 8192 bytes) [ 5.473751] alg: No test for stdrng (krng) [ 5.474018] bounce: pool size: 64 pages [ 5.474282] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252) [ 5.474444] io scheduler noop registered [ 5.474535] io scheduler deadline registered [ 5.474838] io scheduler cfq registered (default) [ 5.478315] ffe2ee00: ttyS0 at MMIO 0x1fe020043f8 (irq = 5, base_baud = 115387) is a 16550A [ 5.478530] Console: ttyS0 (SU) [ 5.510040] console [ttyS0] enabled [ 5.513297] Unable to handle kernel NULL pointer dereference [ 5.513709] tsk->{mm,active_mm}->context = 0000000000000000 [ 5.514096] tsk->{mm,active_mm}->pgd = fffff80000402000 [ 5.514457] \|/ ____ \|/ [ 5.514457] "@'/ .. \`@" [ 5.514457] /_| \__/ |_\ [ 5.514457] \__U_/ [ 5.515389] swapper/0(1): Oops [#1] [ 5.515857] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.1.0-rc5+ #3 [ 5.516319] task: fffff8000f0a36a0 ti: fffff8000f0bc000 task.ti: fffff8000f0bc000 [ 5.516828] TSTATE: 0000000080001606 TPC: 00000000006e1c7c TNPC: 00000000006e1c80 Y: 00000002 Not tainted [ 5.517549] TPC: <sparc_i8042_probe+0x1c/0x110> [ 5.517855] g0: fffff8000f02daa8 g1: 0000000000000000 g2: fffff8000f3f7438 g3: fffff8000f3f7090 [ 5.518405] g4: fffff8000f0a36a0 g5: fffff8000ee10000 g6: fffff8000f0bc000 g7: 000000000000000a [ 5.518941] o0: fffff8000f3f7438 o1: 00000000008eef88 o2: fffff8000f3f7438 o3: fffff8000f803040 [ 5.519476] o4: 0000000000000000 o5: fffff8000f3f7438 sp: fffff8000f0bed31 ret_pc: 00000000005a9e88 [ 5.520079] RPC: <sysfs_do_create_link_sd.isra.0+0x74/0xb0> [ 5.520450] l0: 00000000008ec400 l1: 00000000008e8c00 l2: fffff8000f803140 l3: fffff8000f803180 [ 5.521075] l4: 0000000000000001 l5: 0000000000000000 l6: 0000000000970e70 l7: 0000000000000000 [ 5.521619] i0: fffff8000f2fd000 i1: 00000000008e8c00 i2: 00000000008e8400 i3: 00000000008ec400 [ 5.522160] i4: fffff8000f3f7438 i5: fffff8000f3f6970 i6: fffff8000f0bede1 i7: 00000000006c515c [ 5.522707] I7: <platform_drv_probe+0x24/0x78> [ 5.523026] Call Trace: [ 5.523269] [00000000006c515c] platform_drv_probe+0x24/0x78 [ 5.523647] [00000000006c37c0] driver_probe_device+0xec/0x24c [ 5.524008] [00000000006c217c] bus_for_each_drv+0x6c/0x84 [ 5.524350] [00000000006c368c] device_attach+0x60/0x8c [ 5.524676] [00000000006c2d68] bus_probe_device+0x20/0xa0 [ 5.525144] [00000000006c1310] device_add+0x2f0/0x53c [ 5.525475] [00000000006c4f3c] platform_device_add+0x174/0x214 [ 5.525890] [00000000006c5648] __platform_create_bundle+0x48/0xa0 [ 5.526273] [00000000009dae18] i8042_init+0x118/0x174 [ 5.526713] [0000000000426cc8] do_one_initcall+0x168/0x178 [ 5.527262] [00000000009b6bb4] kernel_init_freeable+0x188/0x22c [ 5.527732] [00000000007f0354] kernel_init+0x4/0xf0 [ 5.528165] [00000000004060e4] ret_from_fork+0x1c/0x2c [ 5.528583] [0000000000000000] (null) [ 5.529062] Disabling lock debugging due to kernel taint [ 5.529511] Caller[00000000006c515c]: platform_drv_probe+0x24/0x78 [ 5.529951] Caller[00000000006c37c0]: driver_probe_device+0xec/0x24c [ 5.530371] Caller[00000000006c217c]: bus_for_each_drv+0x6c/0x84 [ 5.530748] Caller[00000000006c368c]: device_attach+0x60/0x8c [ 5.531110] Caller[00000000006c2d68]: bus_probe_device+0x20/0xa0 [ 5.531483] Caller[00000000006c1310]: device_add+0x2f0/0x53c [ 5.531837] Caller[00000000006c4f3c]: platform_device_add+0x174/0x214 [ 5.532234] Caller[00000000006c5648]: __platform_create_bundle+0x48/0xa0 [ 5.532649] Caller[00000000009dae18]: i8042_init+0x118/0x174 [ 5.533095] Caller[0000000000426cc8]: do_one_initcall+0x168/0x178 [ 5.533479] Caller[00000000009b6bb4]: kernel_init_freeable+0x188/0x22c [ 5.533880] Caller[00000000007f0354]: kernel_init+0x4/0xf0 [ 5.534229] Caller[00000000004060e4]: ret_from_fork+0x1c/0x2c [ 5.534580] Caller[0000000000000000]: (null) [ 5.534917] Instruction DUMP: 330023a3 210023b1 230023a3 <fa586048> b616e3d8 b416a2a8 b2166250 a01423e0 a2146260 [ 5.536169] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 [ 5.536169] [ 5.537022] Press Stop-A (L1-A) to return to the boot prom [ 5.537377] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 [ 5.537377] With various printk()s liberally sprinkled around the 8042 driver what I see is something like the following: - sparc_i8042_probe() is called successfully using a platform_device passed in from the initial device tree scan - i8042_init() calls platform_create_bundle() to initialise the platform-specific parts of the keyboard driver in drivers/input/serio/i8042-sparcio.h. - platform_create_bundle() calls platform_device_alloc() to create a new platform_device object. - The new platform_device object is passed into sparc_i8042_probe() for a second time which segfaults when trying to access the platform_device's OF node property with op->dev.of_node. At the moment I'm confused as to how this can work on real hardware since platform_device_alloc() creates a new platform_device from scratch and so the reference to the OF device node dev.of_node, which is eventually passed onto sparc_i8042_probe() when it is called for the second time, is never populated. Can anyone help point me in the right direction and show me what I'm doing wrong? Many thanks, Mark. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
