On Wed, Apr 29, 2015 at 4:48 AM, Ard Biesheuvel ard.biesheuvel@linaro.org wrote:
Hi all,
Yesterday and this morning, I had a go at bringing the 32-bit ARM EFI support in line with the current arm64 upstream code. I have reshuffled a lot of Roy's code, mainly so that the remaining delta against the ARM tree is as small as possible, and keeps out of existing early init code as much as possible. I have not reused any of the existing 32-bit runtime services code. I did not use the early ioremap support but instead refactored the existing init code lightly so that we can use two adjacent fixmap slots instead.
This mostly works, but there are (at least) two issues that need resolving:
- LPAE support builds but doesn't run
- the EFI page tables are clobbered at some point in the execution -> note in the log below that the RTC efi is read successfully once, but later on (when invoked by hwclock from userland), the page table entries have been cleared
I don't intend to burn a lot of time on this but it may be worthwile to run this on a model (with better watchpoint support) to figure out what is going on with the page tables. Not today though ....
Very nice! I will try to take a look at this. The 32 bit stub has been something that has been on my nagging todo list for a while..
Roy
Ard Biesheuvel (7): efi: avoid initialized .data in the EFI stub efi: build efi_config_init() only if CONFIG_EARLY_IOREMAP arm64/efi: split off EFI init and runtime code for reuse by 32-bit ARM arm64/efi: refactor EFI init and runtime code for reuse by 32-bit ARM ARM: move fixmap init before memblock init and use static allocation ARM: split off core code from create_mapping() for EFI reuse ARM: add UEFI support
Roy Franz (1): ARM: add strstr and strncmp to compressed string.c
arch/arm/Kconfig | 19 ++ arch/arm/boot/compressed/.gitignore | 2 + arch/arm/boot/compressed/Makefile | 18 +- arch/arm/boot/compressed/efi-header.S | 141 +++++++++++ arch/arm/boot/compressed/efi-stub.c | 89 +++++++ arch/arm/boot/compressed/head.S | 66 ++++- arch/arm/boot/compressed/string.c | 43 ++++ arch/arm/include/asm/efi.h | 135 ++++++++++ arch/arm/include/asm/fixmap.h | 4 + arch/arm/include/asm/mach/map.h | 1 + arch/arm/kernel/setup.c | 5 + arch/arm/mm/mmu.c | 68 +++-- arch/arm64/include/asm/efi.h | 29 +++ arch/arm64/kernel/efi.c | 330 +------------------------ drivers/firmware/efi/Makefile | 4 + drivers/firmware/efi/arm-init.c | 212 ++++++++++++++++ drivers/firmware/efi/arm-runtime.c | 142 +++++++++++ drivers/firmware/efi/efi.c | 2 + drivers/firmware/efi/libstub/efi-stub-helper.c | 8 +- 19 files changed, 952 insertions(+), 366 deletions(-) create mode 100644 arch/arm/boot/compressed/efi-header.S create mode 100644 arch/arm/boot/compressed/efi-stub.c create mode 100644 arch/arm/include/asm/efi.h create mode 100644 drivers/firmware/efi/arm-init.c create mode 100644 drivers/firmware/efi/arm-runtime.c
--
EFI stub: Booting Linux Kernel... EFI stub: Using DTB from configuration table EFI stub: Exiting boot services and installing virtual address map... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 4.1.0-rc1-00008-gb6fc321f4ca5-dirty (ard@ards-macbook-pro) (gcc version 4.9.1 20140529 (prerelease) (crosstool-NG linaro-1.13.1-4.9-2014.06 - Linaro GCC 4.9-2014.06) ) #124 SMP Wed Apr 29 13:28:54 CEST 2015 [ 0.000000] CPU: ARMv7 Processor [412fc0f1] revision 1 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache [ 0.000000] Machine model: linux,dummy-virt [ 0.000000] earlycon: no match for ttyAMA0 [ 0.000000] efi: Getting EFI parameters from FDT: [ 0.000000] efi: System Table: 0x000000007fc25010 [ 0.000000] efi: MemMap Address: 0x0000000076b20010 [ 0.000000] efi: MemMap Size: 0x00000540 [ 0.000000] efi: MemMap Desc. Size: 0x00000030 [ 0.000000] efi: MemMap Desc. Version: 0x00000001 [ 0.000000] Processing EFI memory map: [ 0.000000] 0x000040000000-0x0000425f5fff [Loader Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x0000425f6000-0x000047fedfff [Conventional Memory| | | | | |WB|WT|WC|UC] [ 0.000000] 0x000047fee000-0x000047ffffff [Loader Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x000048000000-0x000076b1ffff [Conventional Memory| | | | | |WB|WT|WC|UC] [ 0.000000] 0x000076b20000-0x000076b21fff [Loader Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x000076b22000-0x000077116fff [Loader Code | | | | | |WB|WT|WC|UC] [ 0.000000] 0x000077117000-0x00007711afff [Reserved | | | | | |WB|WT|WC|UC]* [ 0.000000] 0x00007711b000-0x00007711cfff [ACPI Reclaim Memory| | | | | |WB|WT|WC|UC]* [ 0.000000] 0x00007711d000-0x0000771dffff [Runtime Data |RUN| | | | |WB|WT|WC|UC]* [ 0.000000] 0x0000771e0000-0x000079e6bfff [Conventional Memory| | | | | |WB|WT|WC|UC] [ 0.000000] 0x000079e6c000-0x00007a59cfff [Boot Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007a59d000-0x00007a63afff [Conventional Memory| | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007a63b000-0x00007babbfff [Boot Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007babc000-0x00007bb0afff [Conventional Memory| | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007bb0b000-0x00007bb19fff [Boot Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007bb1a000-0x00007bb1efff [Conventional Memory| | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007bb1f000-0x00007c01ffff [Boot Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007c020000-0x00007fabefff [Conventional Memory| | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007fabf000-0x00007fbc7fff [Boot Code | | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007fbc8000-0x00007fbdbfff [Runtime Code |RUN| | | | |WB|WT|WC|UC]* [ 0.000000] 0x00007fbdc000-0x00007fc0dfff [Runtime Data |RUN| | | | |WB|WT|WC|UC]* [ 0.000000] 0x00007fc0e000-0x00007fc0ffff [Boot Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007fc10000-0x00007fc23fff [Conventional Memory| | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007fc24000-0x00007fc24fff [Boot Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x00007fc25000-0x00007fc25fff [Runtime Data |RUN| | | | |WB|WT|WC|UC]* [ 0.000000] 0x00007fc26000-0x00007fffffff [Boot Data | | | | | |WB|WT|WC|UC] [ 0.000000] 0x000004000000-0x000007ffffff [Memory Mapped I/O |RUN| | | | | | | |UC] [ 0.000000] 0x000009010000-0x000009010fff [Memory Mapped I/O |RUN| | | | | | | |UC] [ 0.000000] EFI v2.40 by EDK II [ 0.000000] efi: [ 0.000000] cma: Reserved 64 MiB at 0x7b800000 [ 0.000000] Memory policy: Data cache writealloc [ 0.000000] psci: probing for conduit method from DT. [ 0.000000] psci: PSCIv0.2 detected in firmware. [ 0.000000] psci: Using standard PSCI v0.2 function IDs [ 0.000000] PERCPU: Embedded 12 pages/cpu @eefe3000 s16960 r8192 d24000 u49152 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 260624 [ 0.000000] Kernel command line: console=ttyAMA0 uefi_debug root=/dev/vda2 [ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes) [ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) [ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Memory: 958824K/1048576K available (8132K kernel code, 967K rwdata, 3688K rodata, 828K init, 321K bss, 24216K reserved, 65536K cma-reserved, 203708K highmem) [ 0.000000] Virtual kernel memory layout: [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB) [ 0.000000] vmalloc : 0xf0000000 - 0xff000000 ( 240 MB) [ 0.000000] lowmem : 0xc0000000 - 0xef800000 ( 760 MB) [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) [ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB) [ 0.000000] .text : 0xc0208000 - 0xc0d940e0 (11825 kB) [ 0.000000] .init : 0xc0d95000 - 0xc0e64000 ( 828 kB) [ 0.000000] .data : 0xc0e64000 - 0xc0f55f40 ( 968 kB) [ 0.000000] .bss : 0xc0f58000 - 0xc0fa86d8 ( 322 kB) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] Hierarchical RCU implementation. [ 0.000000] Additional per-CPU info printed with stalls. [ 0.000000] RCU restricting CPUs from NR_CPUS=16 to nr_cpu_ids=1. [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1 [ 0.000000] NR_IRQS:16 nr_irqs:16 16 [ 0.000000] Architected cp15 timer(s) running at 62.50MHz (virt). [ 0.000000] clocksource arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x1cd42e208c, max_idle_ns: 881590405314 ns [ 0.000118] sched_clock: 56 bits at 62MHz, resolution 16ns, wraps every 4398046511096ns [ 0.000226] Switching to timer-based delay loop, resolution 16ns [ 0.002942] Console: colour dummy device 80x30 [ 0.003398] Calibrating delay loop (skipped), value calculated using timer frequency.. 125.00 BogoMIPS (lpj=312500) [ 0.003518] pid_max: default: 32768 minimum: 301 [ 0.006917] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes) [ 0.006955] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes) [ 0.014326] CPU: Testing write buffer coherency: ok [ 0.020134] /cpus/cpu@0 missing clock-frequency property [ 0.020346] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 [ 0.020922] Setting up static identity map for 0x40209000 - 0x40209098 [ 0.028361] Brought up 1 CPUs [ 0.028426] SMP: Total of 1 processors activated (125.00 BogoMIPS). [ 0.028474] CPU: All CPU(s) started in SVC mode. [ 0.036288] devtmpfs: initialized [ 0.040769] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0 [ 0.053306] clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 9556302231375000 ns [ 0.064590] pinctrl core: initialized pinctrl subsystem [ 0.080529] NET: Registered protocol family 16 [ 0.087570] DMA: preallocated 256 KiB pool for atomic coherent allocations [ 0.091747] cpuidle: using governor ladder [ 0.091877] cpuidle: using governor menu [ 0.091935] Remapping and enabling EFI services. [ 0.092255] EFI remap 0x7711d000 => 4000d000 [ 0.092976] EFI remap 0x7fbc8000 => 400d8000 [ 0.093004] EFI remap 0x7fbdc000 => 400fc000 [ 0.093024] EFI remap 0x7fc25000 => 40135000 [ 0.093039] EFI remap 0x04000000 => 40200000 [ 0.093110] EFI remap 0x09010000 => 44200000 [ 0.113384] No ATAGs? [ 0.113803] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers. [ 0.113892] hw-breakpoint: maximum watchpoint size is 8 bytes. [ 0.119299] Serial: AMBA PL011 UART driver [ 0.120749] 9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 52, base_baud = 0) is a PL011 rev1 [ 0.139298] console [ttyAMA0] enabled [ 0.233516] vgaarb: loaded [ 0.239868] SCSI subsystem initialized [ 0.244809] usbcore: registered new interface driver usbfs [ 0.245706] usbcore: registered new interface driver hub [ 0.246613] usbcore: registered new device driver usb [ 0.253095] media: Linux media interface: v0.10 [ 0.253947] Linux video capture interface: v2.00 [ 0.254678] pps_core: LinuxPPS API ver. 1 registered [ 0.255062] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti giometti@linux.it [ 0.255873] PTP clock support registered [ 0.257389] EDAC MC: Ver: 3.0.0 [ 0.265252] Advanced Linux Sound Architecture Driver Initialized. [ 0.282630] Switched to clocksource arch_sys_counter [ 0.332666] NET: Registered protocol family 2 [ 0.341082] TCP established hash table entries: 8192 (order: 3, 32768 bytes) [ 0.342231] TCP bind hash table entries: 8192 (order: 4, 65536 bytes) [ 0.343018] TCP: Hash tables configured (established 8192 bind 8192) [ 0.344267] UDP hash table entries: 512 (order: 2, 16384 bytes) [ 0.344795] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes) [ 0.347463] NET: Registered protocol family 1 [ 0.352278] RPC: Registered named UNIX socket transport module. [ 0.352676] RPC: Registered udp transport module. [ 0.352960] RPC: Registered tcp transport module. [ 0.353230] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 0.373238] futex hash table entries: 256 (order: 2, 16384 bytes) [ 0.420563] squashfs: version 4.0 (2009/01/31) Phillip Lougher [ 0.425328] NFS: Registering the id_resolver key type [ 0.426767] Key type id_resolver registered [ 0.427035] Key type id_legacy registered [ 0.427812] ntfs: driver 2.1.32 [Flags: R/O]. [ 0.438395] bounce: pool size: 64 pages [ 0.439517] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248) [ 0.440019] io scheduler noop registered [ 0.440277] io scheduler deadline registered [ 0.441080] io scheduler cfq registered (default) [ 0.463911] PCI host bridge /pcie@10000000 ranges: [ 0.464611] IO 0x3eff0000..0x3effffff -> 0x00000000 [ 0.465131] MEM 0x10000000..0x3efeffff -> 0x10000000 [ 0.468035] pci-host-generic 3f000000.pcie: PCI host bridge to bus 0000:00 [ 0.468773] pci_bus 0000:00: root bus resource [bus 00-0f] [ 0.469124] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] [ 0.469463] pci_bus 0000:00: root bus resource [mem 0x10000000-0x3efeffff] [ 0.472424] pci 0000:00:00.0: IOMMU is currently not supported for PCI [ 0.474335] PCI: bus0: Fast back to back transfers disabled [ 0.632744] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.636742] SuperH (H)SCI(F) driver initialized [ 0.638086] msm_serial: driver initialized [ 0.639063] STMicroelectronics ASC driver initialized [ 0.641720] [drm] Initialized drm 1.1.0 20060810 [ 0.659210] loop: module loaded [ 0.674291] vda: vda1 vda2 [ 0.689435] CAN device driver interface [ 0.691055] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.2.15-k [ 0.691280] igb: Copyright (c) 2007-2014 Intel Corporation. [ 0.694341] pegasus: v0.9.3 (2013/04/25), Pegasus/Pegasus II USB Ethernet driver [ 0.694655] usbcore: registered new interface driver pegasus [ 0.694987] usbcore: registered new interface driver asix [ 0.695260] usbcore: registered new interface driver ax88179_178a [ 0.695545] usbcore: registered new interface driver cdc_ether [ 0.695860] usbcore: registered new interface driver smsc75xx [ 0.696165] usbcore: registered new interface driver smsc95xx [ 0.696563] usbcore: registered new interface driver net1080 [ 0.696881] usbcore: registered new interface driver cdc_subset [ 0.697179] usbcore: registered new interface driver zaurus [ 0.697529] usbcore: registered new interface driver cdc_ncm [ 0.701287] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 0.701882] ehci-pci: EHCI PCI platform driver [ 0.702229] ehci-platform: EHCI generic platform driver [ 0.702671] ehci-omap: OMAP-EHCI Host Controller driver [ 0.703101] ehci-orion: EHCI orion driver [ 0.703434] SPEAr-ehci: EHCI SPEAr driver [ 0.703766] ehci-st: EHCI STMicroelectronics driver [ 0.704114] ehci-exynos: EHCI EXYNOS driver [ 0.704610] tegra-ehci: Tegra EHCI driver [ 0.705215] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 0.705714] ohci-pci: OHCI PCI platform driver [ 0.706201] ohci-platform: OHCI generic platform driver [ 0.706838] ohci-omap3: OHCI OMAP3 driver [ 0.707191] SPEAr-ohci: OHCI SPEAr driver [ 0.707534] ohci-st: OHCI STMicroelectronics driver [ 0.708011] usbcore: registered new interface driver usb-storage [ 0.710715] mousedev: PS/2 mouse device common for all mice [ 0.715348] pgd = ee0a8000 [ 0.715530] [40135fa8] *pgd=6eff0801, *pte=7fc2565f, *ppte=7fc2545f [ 0.717378] pgd = c0204000 [ 0.717569] [40135fa8] *pgd=00000000 [ 0.718496] pgd = ee0a8000 [ 0.718662] [40135fa8] *pgd=6eff0801, *pte=7fc2565f, *ppte=7fc2545f [ 0.719064] pgd = c0204000 [ 0.719229] [40135fa8] *pgd=00000000 [ 0.720592] rtc-efi rtc-efi: rtc core: registered rtc-efi as rtc0 [ 0.725523] i2c /dev entries driver [ 0.730382] usbcore: registered new interface driver uvcvideo [ 0.730574] USB Video Class driver (1.1.1) [ 0.730722] gspca_main: v2.14.0 registered [ 0.738884] sdhci: Secure Digital Host Controller Interface driver [ 0.739077] sdhci: Copyright(c) Pierre Ossman [ 0.741055] Synopsys Designware Multimedia Card Interface Driver [ 0.742779] sdhci-pltfm: SDHCI platform and OF driver helper [ 0.745151] ledtrig-cpu: registered to indicate activity on CPUs [ 0.745887] usbcore: registered new interface driver usbhid [ 0.746056] usbhid: USB HID core driver [ 0.752141] usbcore: registered new interface driver snd-usb-audio [ 0.757717] NET: Registered protocol family 17 [ 0.757962] can: controller area network core (rev 20120528 abi 9) [ 0.758407] NET: Registered protocol family 29 [ 0.758597] can: raw protocol (rev 20120528) [ 0.758793] can: broadcast manager protocol (rev 20120528 t) [ 0.759009] can: netlink gateway (rev 20130117) max_hops=1 [ 0.760727] Key type dns_resolver registered [ 0.761485] ThumbEE CPU extension supported. [ 0.761804] Registering SWP/SWPB emulation handler [ 0.769849] pgd = ee0a8000 [ 0.770038] [40135fa8] *pgd=6eff0801, *pte=7fc2565f, *ppte=7fc2545f [ 0.771889] rtc-efi rtc-efi: setting system clock to 2015-04-29 11:29:27 UTC (1430306967) [ 0.773564] ALSA device list: [ 0.773716] No soundcards found. [ 0.776119] uart-pl011 9000000.pl011: no DMA platform data [ 0.780952] EXT4-fs (vda2): couldn't mount as ext3 due to feature incompatibilities [ 0.782820] EXT4-fs (vda2): couldn't mount as ext2 due to feature incompatibilities [ 0.785690] EXT4-fs (vda2): INFO: recovery required on readonly filesystem [ 0.785914] EXT4-fs (vda2): write access will be enabled during recovery [ 0.818639] EXT4-fs (vda2): recovery complete [ 0.823286] EXT4-fs (vda2): mounted filesystem with ordered data mode. Opts: (null) [ 0.824828] VFS: Mounted root (ext4 filesystem) readonly on device 254:2. [ 0.829458] devtmpfs: mounted [ 0.850536] Freeing unused kernel memory: 828K (c0d95000 - c0e64000) INIT: version 2.88 booting Error opening /dev/fb0: No such file or directory Starting udev [ 2.201880] udevd[65]: starting version 182 [ 9.722297] FAT-fs (vda1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. [ 9.968052] EXT4-fs (vda2): re-mounted. Opts: data=ordered [ 10.346751] random: dd urandom read with 9 bits of entropy available Populating dev cache [ 13.790965] pgd = ee0a8000 [ 13.791126] [40135fa8] *pgd=6eff0801, *pte=00000000, *ppte=00000000 [ 13.791581] Unable to handle kernel paging request at virtual address 40135fa8 [ 13.791820] pgd = ed170000 [ 13.791925] [40135fa8] *pgd=00000000 [ 13.792281] Internal error: Oops: 7 [#1] SMP ARM [ 13.792553] Modules linked in: [ 13.792879] CPU: 0 PID: 308 Comm: hwclock Not tainted 4.1.0-rc1-00008-gb6fc321f4ca5-dirty #124 [ 13.793144] Hardware name: Generic DT based system [ 13.793355] task: ed03d300 ti: ed252000 task.ti: ed252000 [ 13.793607] PC is at virt_efi_get_time+0x4c/0x88 [ 13.793794] LR is at broadcast_tlb_a15_erratum+0x1c/0x3c [ 13.793985] pc : [<c0851a58>] lr : [<c0216ca8>] psr: 60060093 [ 13.793985] sp : ed253e68 ip : 00000000 fp : 00000000 [ 13.794328] r10: 00000000 r9 : ed252000 r8 : ed253e84 [ 13.794508] r7 : 40060013 r6 : ed253e90 r5 : c0f9be08 r4 : c0f9be04 [ 13.794718] r3 : 40135f90 r2 : 00000000 r1 : ed253e84 r0 : ed253e90 [ 13.794982] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user [ 13.795221] Control: 10c5387d Table: 6e0a806a DAC: 00000015 [ 13.795425] Process hwclock (pid: 308, stack limit = 0xed252220) [ 13.795646] Stack: (0xed253e68 to 0xed254000) [ 13.795903] 3e60: ed253ed4 c0f0a158 ee389800 bed83c34 c0ab1b20 c07baadc [ 13.796169] 3e80: ee002d00 ed08ef00 ed253ef0 c03154a4 ed253eac ed0c3080 00000000 ed0c9a50 [ 13.796426] 3ea0: ed253fb0 ee389994 ed253ed4 c07b6d68 ee389800 ee389998 ed253ed4 c07b6dbc [ 13.796684] 3ec0: ee389800 80247009 ee389998 c07b8048 ed0e0000 00000000 00000000 00000000 [ 13.796937] 3ee0: 00000000 00000000 00000000 00000000 00000000 00000000 b37f1802 00000004 [ 13.797191] 3f00: ed14e540 000a7cf8 00000000 ed8256e8 ee38abe8 00000101 00000004 0000004a [ 13.797446] 3f20: ee38abe8 bed83c34 ed08ef00 00000003 bed83c34 c0318944 00000000 00000000 [ 13.797701] 3f40: 00020000 00000003 00000003 ed08ef00 ed0e0000 ee38abe8 ed08ef08 00000020 [ 13.797953] 3f60: 00000000 c03075fc 00000000 00000000 00000000 ed08ef00 00000003 ed08ef00 [ 13.798209] 3f80: 80247009 bed83c34 ed252000 c0318b6c 00094500 00000003 00000002 00000036 [ 13.798464] 3fa0: c0210784 c0210600 00094500 00000003 00000003 80247009 bed83c34 00094500 [ 13.798720] 3fc0: 00094500 00000003 00000002 00000036 00000000 00000000 000a7cf8 00000000 [ 13.798984] 3fe0: b6e2e8a0 bed83bfc 00019538 b6e2e8ac 60060010 00000003 6f7fd821 6f7fdc21 [ 13.799397] [<c0851a58>] (virt_efi_get_time) from [<c07baadc>] (efi_read_time+0x28/0x74) [ 13.799709] [<c07baadc>] (efi_read_time) from [<c07b6d68>] (__rtc_read_time.isra.3+0x48/0x6c) [ 13.799986] [<c07b6d68>] (__rtc_read_time.isra.3) from [<c07b6dbc>] (rtc_read_time+0x30/0x44) [ 13.800237] [<c07b6dbc>] (rtc_read_time) from [<c07b8048>] (rtc_dev_ioctl+0x328/0x5b0) [ 13.800481] [<c07b8048>] (rtc_dev_ioctl) from [<c0318944>] (do_vfs_ioctl+0x418/0x60c) [ 13.800755] [<c0318944>] (do_vfs_ioctl) from [<c0318b6c>] (SyS_ioctl+0x34/0x5c) [ 13.800991] [<c0318b6c>] (SyS_ioctl) from [<c0210600>] (ret_fast_syscall+0x0/0x34) [ 13.801370] Code: e1a01008 e5933000 e1a00006 e5933038 (e5933018) [ 13.801783] ---[ end trace d5b7f564e6da9c28 ]---