From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-it0-x242.google.com ([2607:f8b0:4001:c0b::242]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fgBNo-0001Ce-UB for barebox@lists.infradead.org; Thu, 19 Jul 2018 16:03:07 +0000 Received: by mail-it0-x242.google.com with SMTP id 16-v6so10514629itl.5 for ; Thu, 19 Jul 2018 09:02:14 -0700 (PDT) MIME-Version: 1.0 References: <461871869.117927.1531898866247@mail.vodafone.de> <743326560.1811.1531984611843@mail.vodafone.de> In-Reply-To: <743326560.1811.1531984611843@mail.vodafone.de> From: Andrey Smirnov Date: Thu, 19 Jul 2018 09:02:01 -0700 Message-ID: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: imx7d enable second core To: giorgio.nicole@arcor.de Cc: Barebox List On Thu, Jul 19, 2018 at 12:16 AM Giorgio Dal Molin wrote: > > Hi Andrey, > > thank you for your answer, > > > On July 18, 2018 at 6:54 PM Andrey Smirnov wrote: > > > > > > On Wed, Jul 18, 2018 at 12:28 AM Giorgio Dal Molin > > wrote: > > > > > > Hi all, > > > > > > I'm currently working with the imx7d sabre board from NXP. > > > > > > I have now a running barebox bootloader and a booting kernel. > > > > > > My problem is now that, apparently, only one core is active: > > > > > > ... > > > commandline: console=ttymxc0,115200n8 ip=11.0.0.4::11.0.0.2:255.0.0.0::eth0: root=/dev/mmcblk0p2 rootdelay=1 > > > Starting kernel in secure mode > > > > AFAIK, this means that you are booting in secure mode and secure > > monitor code, which also implements PSCI needed for SMP to work, will > > _not_ be installed by Barebox. One way to fix this would be to set: > > > > global.bootm.secure_state=nonsecure > > > > before booting Linux. Doing that I get: > > > > # lscpu -e > > CPU SOCKET CORE ONLINE MAXMHZ MINMHZ > > 0 0 0 yes 996.0000 792.0000 > > 1 0 1 yes 996.0000 792.0000 > > # > > > > on my SabreSD board. > > > > Thanks, > > Andrey Smirnov > > > > yesterday I experimented a bit more with board + barebox + kernel > and found the following procedure that (almost) works: > > - enable the PSCI support in barebox and kernel; > - #define DEBUG in '/arch/arm/cpu/psci.c' to have the command 'smc'; > - boot up barebox on the board, call 'smc -n' and start the kernel: > Is there any particular reason you used a command meant for debugging instead of "global.bootm.secure_state=nonsecure", which is available without needing to do any source modification? > ... > Hit any key to stop autoboot: 4 > imx7: / tftp karm > eth0: No MAC address set. Using random address 1a:4e:1f:63:ea:77 > eth0: 1000Mbps full duplex link detected > T [#################################################################] > imx7: / tftp darm > [#################################################################] > imx7: / smc -n > imx7: / boot > > Loading ARM Linux zImage 'karm' > Loading devicetree from 'darm' > commandline: console=ttymxc0,115200n8 ip=11.0.0.4::11.0.0.2:255.0.0.0::eth0: root=/dev/mmcblk0p2 rootdelay=1 > Starting kernel in secure mode > [ 0.000000] Booting Linux on physical CPU 0x0 > [ 0.000000] Linux version 4.17.8-dirty (giorgio@BV_blfs) (gcc version 8.1.0 (OSELAS.Toolchain-2018.02.0)) #2 SMP Thu Jul 19 08:13:42 CEST 2018 > [ 0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d > [ 0.000000] CPU: div instructions available: patching division code > [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache > [ 0.000000] OF: fdt: Machine model: Freescale i.MX7 SabreSD Board > [ 0.000000] Memory policy: Data cache writealloc > [ 0.000000] cma: Reserved 64 MiB at 0xba000000 > [ 0.000000] psci: probing for conduit method from DT. > [ 0.000000] psci: psci_get_version: called. > [ 0.000000] psci: PSCIv1.0 detected in firmware. > [ 0.000000] psci: Using standard PSCI v0.2 function IDs > [ 0.000000] psci: MIGRATE_INFO_TYPE not supported. > [ 0.000000] psci: SMC Calling Convention v1.0 > [ 0.000000] percpu: Embedded 14 pages/cpu @(ptrval) s36392 r0 d20952 u57344 > [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 260608 > [ 0.000000] Kernel command line: console=ttymxc0,115200n8 ip=11.0.0.4::11.0.0.2:255.0.0.0::eth0: root=/dev/mmcblk0p2 rootdelay=1 video=mxsfb0:dev=hdmi,1024x768M@60 > [ 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: 950776K/1048576K available (10240K kernel code, 473K rwdata, 2216K rodata, 1024K init, 7790K bss, 32264K reserved, 65536K cma-reserved, 196196K highmem) > [ 0.000000] Virtual kernel memory layout: > [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) > [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB) > [ 0.000000] vmalloc : 0xf0800000 - 0xff800000 ( 240 MB) > [ 0.000000] lowmem : 0xc0000000 - 0xf0000000 ( 768 MB) > [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) > [ 0.000000] .text : 0x(ptrval) - 0x(ptrval) (11232 kB) > [ 0.000000] .init : 0x(ptrval) - 0x(ptrval) (1024 kB) > [ 0.000000] .data : 0x(ptrval) - 0x(ptrval) ( 474 kB) > [ 0.000000] .bss : 0x(ptrval) - 0x(ptrval) (7791 kB) > [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 > [ 0.000000] Running RCU self tests > [ 0.000000] Hierarchical RCU implementation. > [ 0.000000] RCU event tracing is enabled. > [ 0.000000] RCU lockdep checking is enabled. > [ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16 > [ 0.000000] Offload RCU callbacks from CPUs: (none). > [ 0.000000] arch_timer: cp15 timer(s) running at 8.00MHz (virt). > [ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x1d854df40, max_idle_ns: 440795202120 ns > [ 0.000008] sched_clock: 56 bits at 8MHz, resolution 125ns, wraps every 2199023255500ns > [ 0.000032] Switching to timer-based delay loop, resolution 125ns > [ 0.000546] Switching to timer-based delay loop, resolution 41ns > [ 0.000575] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns > [ 0.000602] clocksource: mxc_timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns > [ 0.002000] Console: colour dummy device 80x30 > [ 0.002032] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar > [ 0.002051] ... MAX_LOCKDEP_SUBCLASSES: 8 > [ 0.002069] ... MAX_LOCK_DEPTH: 48 > [ 0.002087] ... MAX_LOCKDEP_KEYS: 8191 > [ 0.002104] ... CLASSHASH_SIZE: 4096 > [ 0.002122] ... MAX_LOCKDEP_ENTRIES: 32768 > [ 0.002140] ... MAX_LOCKDEP_CHAINS: 65536 > [ 0.002158] ... CHAINHASH_SIZE: 32768 > [ 0.002176] memory used by lock dependency info: 4655 kB > [ 0.002194] per task-struct memory footprint: 1536 bytes > [ 0.002247] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=240000) > [ 0.002281] pid_max: default: 32768 minimum: 301 > [ 0.002609] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes) > [ 0.002641] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes) > [ 0.004422] CPU: Testing write buffer coherency: ok > [ 0.005337] CPU0: update cpu_capacity 1024 > [ 0.005364] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 > [ 0.006831] Setting up static identity map for 0x80100000 - 0x80100060 > [ 0.007259] Hierarchical SRCU implementation. > [ 0.008927] smp: Bringing up secondary CPUs ... > [ 0.010632] psci: psci_cpu_on: called. cpuid: 0x00000001 > [ 0.010993] CPU1: update cpu_capacity 1024 > [ 0.011005] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 > [ 0.011622] smp: Brought up 1 node, 2 CPUs > [ 0.011663] SMP: Total of 2 processors activated (96.00 BogoMIPS). > [ 0.011682] CPU: All CPU(s) started in SVC mode. > [ 0.013716] devtmpfs: initialized > ... > > > this way the kernel smp is able to start up the second core. > The problem that remains with this setup is that the CAAM crypto > coprocessor in the imx7 does not work anymore: > > ... > [ 5.265081] mmc1: SDHCI controller on 30b50000.usdhc [30b50000.usdhc] using ADMA > [ 5.308453] mmc2: SDHCI controller on 30b60000.usdhc [30b60000.usdhc] using ADMA > [ 5.320799] caam 30900000.caam: Entropy delay = 3200 > [ 5.352668] caam 30900000.caam: failed to acquire DECO 0 > [ 5.358008] caam 30900000.caam: failed to instantiate RNG > [ 5.366479] usbcore: registered new interface driver usbhid > [ 5.372081] usbhid: USB HID core driver > ... I've never used CAAM, so I am not sure what's going on, but my educated guess would that this might have to do with TrustZone permissions. > > This is probably due to the 'secure mode' in which the kernel is now booting > but I need a bit more background knowledge about the PSCI in general to really > understand what's going on here. You kernel was booting in 'secure mode' before, now it actually boots in 'nonsecure', but because you installed the monitor through a backdoor that log line still prints 'secure'. Thanks, Andrey Smirnov _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox