users March 2015

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31 participants
33 discussions

Can't run Android on Pandaboard
by Zachary 16 Mar '15

16 Mar '15

Hi all, I want to run Android using Genode foc on Pandaboard referencing to "http://sourceforge.net/p/genode/mailman/message/30642833/" Now, I compile and get a image. When I run the image, I only get a black window with a penguin on it. This my operation: 1) Format my SD card to 3 partitions. 2) Copy the system-ginger.img via "dd" to the second partition: sudo dd if=system-ginger of=/dev/sdb2 bs=1M 3) Build the image using the run script blew 4) Copy the image to the first partition of the SD card This is my run script: # # Build # if {[have_spec foc] == 0} { puts "Runs on Fiasco.OC only" exit 0 } # generic components set build_components { core init drivers/timer drivers/framebuffer drivers/sd_card drivers/usb drivers/gpio server/nitpicker server/nit_fb server/nic_bridge server/part_blk server/terminal server/terminal_log l4android } build $build_components create_boot_directory # # Config # set config { <config prio_levels="2"> <parent-provides> <service name="ROM"/> <service name="RAM"/> <service name="IRQ"/> <service name="IO_MEM"/> <service name="IO_PORT"/> <service name="CAP"/> <service name="PD"/> <service name="RM"/> <service name="CPU"/> <service name="LOG"/> <service name="SIGNAL"/> </parent-provides> <default-route> <any-service> <parent/> <any-child/> </any-service> </default-route> <start name="timer"> <resource name="RAM" quantum="1M"/> <provides><service name="Timer"/></provides> </start> <start name="fb_drv"> <binary name="fb_drv"/> <resource name="RAM" quantum="4M"/> <provides><service name="Framebuffer"/></provides> </start> <start name="sd_card_drv"> <resource name="RAM" quantum="4M"/> <provides><service name="Block"/></provides> </start> <start name="gpio_drv"> <resource name="RAM" quantum="4M"/> <provides><service name="Gpio"/></provides> <config/> </start> <start name="usb_drv"> <resource name="RAM" quantum="12M"/> <provides> <service name="Input"/> <service name="Nic"/> </provides> <config ehci="yes"> <hid/> <nic mac="2e:60:90:0c:4e:01" /> </config> </start> <start name="part_blk"> <resource name="RAM" quantum="2M"/> <provides><service name="Block"/></provides> <config> <policy label="l4android -> sda" partition="3" /> </config> <route> <service name="Block"> <child name="sd_card_drv"/> </service> <any-service> <parent/> <any-child/> </any-service> </route> </start> <start name="nic_bridge" priority="-1"> <resource name="RAM" quantum="2M"/> <provides><service name="Nic"/></provides> <route> <service name="Nic"> <child name="usb_drv"/> </service> <any-service> <parent/> <any-child/> </any-service> </route> </start> <start name="nitpicker"> <resource name="RAM" quantum="2M"/> <provides><service name="Nitpicker"/></provides> <route> <service name="Input"> <child name="usb_drv"/> </service> <service name="Framebuffer"> <child name="fb_drv"/> </service> <any-service> <parent/> <any-child/> </any-service> </route> </start> <start name="android_fb"> <binary name="nit_fb"/> <resource name="RAM" quantum="4M"/> <provides> <service name="Framebuffer"/> <service name="Input"/> </provides> <config xpos="0" ypos="0" width="640" height="480"/> </start> <start name="l4android"> <resource name="RAM" quantum="512M"/> <config args="mem=128M console=ttyS0 l4x_rd=root-ginger.gz"> <block label="sda"/> </config> <route> <service name="Input"> <child name="android_fb"/> </service> <service name="Framebuffer"> <child name="android_fb"/> </service> <service name="Block"> <child name="part_blk"/> </service> <service name="Nic"> <child name="nic_bridge"/> </service> <any-service> <parent/> <any-child/> </any-service> </route> </start> </config>} install_config $config # # Boot modules # set boot_modules { core init timer nitpicker nit_fb nic_bridge terminal terminal_log fb_drv part_blk sd_card_drv gpio_drv usb_drv l4android root-ginger.gz ld.lib.so } lappend_if [have_spec x86] boot_modules nic_drv lappend_if [have_spec x86] boot_modules atapi_drv lappend_if [have_spec pci] boot_modules pci_drv lappend_if [have_spec ps2] boot_modules ps2_drv lappend_if [have_spec pl11x] boot_modules pl11x_drv lappend_if [have_spec lan9118] boot_modules nic_drv lappend_if [have_spec pl180] boot_modules sd_card_drv lappend_if [have_spec vesa] boot_modules vesa_drv if {[have_spec x86]} { set initrd_uri "http://genode.org/files/release-11.11/l4lx/root-ia32-ginger.gz" set system_uri "http://genode.org/files/release-11.11/l4lx/system-ia32-ginger.img" } elseif {[have_spec arm]} { set initrd_uri "http://genode.org/files/release-11.11/l4lx/root-arm-ginger.gz" set system_uri "http://genode.org/files/release-11.11/l4lx/system-arm-ginger.img" } if {![file exists bin/root-ginger.gz]} { puts "Download initramfs ..." exec curl $initrd_uri > bin/root-ginger.gz 2> /dev/null } if {![file exists bin/system-ginger.img]} { puts "Download system image ..." exec curl $system_uri > bin/system-ginger.img 2> /dev/null } build_boot_image [join $boot_modules " "] append qemu_args " -m 512 " append qemu_args " -serial mon:stdio " append_if [have_spec x86] qemu_args " -hda bin/system-ginger.img " append_if [have_spec x86] qemu_args " -net nic,model=e1000 " append_if [have_spec pl180] qemu_args " -drive file=bin/system-ginger.img,if=sd,cache=writeback " append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 " append qemu_args " -net user -redir tcp:5555::5555 " run_genode_until forever --------------------------------------------------------------------- This is the log: ... Genode 14.11 int main(): --- create local services --- int main(): --- start init --- int main(): transferred 997 MB to init int main(): --- init created, waiting for exit condition --- Quota exceeded! amount=28672, size=4096, consumed=28672 [init] upgrading quota donation for Env::CPU (8192 bytes) [init -> gpio_drv] --- omap4 gpio driver --- Insufficient quota for transfer: init -> part_blk have 1564672, need 4206592 [init] not enough quota for a donation of 4206592 bytes [init -> part_blk] resource_request: ram_quota=4206592 [init -> part_blk] virtual void Genode::Platform_env::release(): used before freeing emergency=290816 [init -> part_blk] virtual void Genode::Platform_env::release(): used after freeing emergency=286720 [init] child "part_blk" requests resources: ram_quota=4206592 [init -> fb_drv] Could not open file "config" [init -> fb_drv] Could not obtain config file [init -> sd_card_drv] --- OMAP4 SD card driver --- [init -> fb_drv] int main(int, char**): using default configuration: HDMI@...311... [init -> gpio_drv] No GPIO config [init -> l4android] Booting L4Linux ... [init -> usb_drv] Services::Services(): Could not read screen resolution in config node [init -> usb_drv] Services::Services(): No <storage> config node found - not starting the USB Storage (Block) service [init -> usb_drv] Services::Services(): No <raw> config node found - not starting external USB service [init -> usb_drv] Enabled EHCI (USB 2.0) support [init -> l4android] ======> L4Linux starting... <======== [init -> l4android] Linux version 3.5.0-l4-gcea6e7a (czzcz@...306...) (gcc version 4.7.4 (GCC) ) #18 SMP Thu Mar 12 10:52:16 CST 2015 [init -> l4android] Binary name: vmlinux [init -> l4android] This is an AEABI build. [init -> l4android] Linux kernel command line (3 args): mem=128M console=ttyS0 l4x_rd=root-ginger.gz [init -> l4android] CPU mapping (l:p)[0]: Image: 01000000 - 01400000 [4096 KiB] [init -> l4android] Areas: Text: 01000000 - 0135e000 [3448kB] [init -> l4android] Data: 0135e000 - 0138b1b8 [180kB] [init -> l4android] Initdata: 01337000 - 0135c4c0 [149kB] [init -> l4android] BSS: 0138c000 - 013c96e8 [245kB] [init -> usb_drv] Using configured mac: 2e:60:90:0c:4e:01 [init -> l4android] l4io_get_root_device: Not implemented yet! [init -> l4android] Device scan: [init -> sd_card_drv] CID: 0x97009861 0x38caa862 0x44303847 0x02544d53 [init -> l4android] l4io_iterate_devices: Not implemented yet! [init -> sd_card_drv] RCA: 0x895a [init -> l4android] Device scan done. [init -> usb_drv] void platform_hcd_init(Services*): register platform device [init -> sd_card_drv] SD card detected [init -> sd_card_drv] capacity: 7600 MiB [init -> usb_drv] dev_info: EHCI Host Controller [init -> usb_drv] dev_info: new USB bus registered, assigned bus number 1 [init -> part_blk] Partition 1: LBA 63 (144522 blocks) type: c [init -> part_blk] Partition 2: LBA 144585 (15149295 blocks) type: c [init -> part_blk] Partition 3: LBA 15293880 (257040 blocks) type: c [init -> usb_drv] dev_info: irq 109, io mem 0x4a064c00 [init -> l4android] main thread will be c [init -> l4android] l4x_register_pointer_section: addr = 01000000 size = 4194304 [init -> l4android] section-with-init: virt: 1000000 to 13fffff [4096 KiB] [init -> l4android] Cannot determine physical address for dataspace Binary! [init -> l4android] error: failed to get physical address for 1000000. [init -> l4android] Main thread running, waiting... [init -> l4android] thread=c000 cpu=0 [init -> l4android] l4x_setup_memory: Forcing superpages for main memory [init -> l4android] l4re_global_env: 0 [init -> l4android] Main memory size: 128MB unmapping of managed dataspaces not yet supported [init -> l4android] Main memory: virt: 8000000 to fffffff [131072 KiB] [init -> l4android] Main memory: Phys: 0x00000000 to 0x08000000, Size: 134217728 [init -> l4android] Filling lower ptabs... [init -> l4android] Done (0 entries). [init -> l4android] l4x_register_pointer_section: addr = 01000000 size = 4194304 [init -> l4android] text: virt: 1000000 to 13fffff [4096 KiB] [init -> l4android] Cannot determine physical address for dataspace Binary! [init -> l4android] error: failed to get physical address for 1000000. [init -> usb_drv] dev_info: USB 2.0 started, EHCI 1.00 [init -> l4android] l4x_virt_to_phys: Could not translate virt. address 1000000 [init -> l4android] l4x_virt_to_phys: Could not translate virt. address 1336fcb [init -> l4android] l4x_virt_to_phys: Could not translate virt. address 135e000 [init -> l4android] l4x_virt_to_phys: Could not translate virt. address 13c96e7 [init -> usb_drv] dev_info: USB hub found [init -> l4android] l4x_virt_to_phys: Could not translate virt. address 1000000 [init -> l4android] l4x_virt_to_phys: Could not translate virt. address 13fffff [init -> l4android] l4x_rd_path: root-ginger.gz [init -> usb_drv] dev_info: 3 ports detected [init -> l4android] Loading: root-ginger.gz [init -> l4android] INITRD: Size of RAMdisk is 224KiB [init -> l4android] RAMdisk from 00005000 to 0003d000 [224KiB] [init -> l4android] l4timer: Using IRQ210 [init -> nitpicker] Could not open file "config" [init -> nitpicker] Could not obtain config file [init] l4android: no route to service "Terminal" [init -> nitpicker] create session with args: label="android_fb", ram_quota=28672 [init -> l4android] l4x_virt_to_phys: Could not translate virt. address 12359a0 [init -> l4android] l4x_virt_to_phys: Could not translate virt. address 12359a0 [init -> l4android] l4io_get_root_device: Not implemented yet! [init -> l4android] l4io_iterate_devices: Not implemented yet! [init -> usb_drv] dev_info: new high-speed USB device number 2 using ehci-omap [init -> android_fb] using xywh=(0,0,640,480) [init -> nic_bridge] Could not open file "config" [init -> nic_bridge] Could not obtain config file Insufficient quota for transfer: init -> nic_bridge have 1564672, need 3301376 [init] not enough quota for a donation of 3301376 bytes [init -> nic_bridge] resource_request: ram_quota=3301376 [init -> nic_bridge] virtual void Genode::Platform_env::release(): used before freeing emergency=278528 [init -> nic_bridge] virtual void Genode::Platform_env::release(): used after freeing emergency=274432 [init] child "nic_bridge" requests resources: ram_quota=3301376 [init -> usb_drv] dev_info: USB hub found [init -> usb_drv] dev_info: 5 ports detected [init -> nic_bridge] Invalid session request, no matching policy [init -> usb_drv] dev_info: new high-speed USB device number 3 using ehci-omap [init -> usb_drv] Using configured mac: 2e:60:90:0c:4e:01 [init -> usb_drv] netif_info: open: enable queueing (rx 4, tx 60) mtu 1500 simple framing [init -> usb_drv] nedev_info: hardware isn't capable of remote wakeup [init -> usb_drv] netif_info: register 'smsc95xx' at usb-ehci-omap-1.1, smsc95xx USB 2.0 Ethernet, 10c4e04M ------------------------------------------------------------------ so, 1)Is there anything wrong with my run script? What should I do to make Android run perfectly on pandaboard? 2)Is "ld.lib.so" necessary? The run script of longjks include the component, but I can't compile it successfully using this script. Best, Zachary

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Fwd: Genode on iMX53 with TrustZone
by Martin Stein 16 Mar '15

16 Mar '15

-------- Forwarded Message -------- Subject: Genode on iMX53 with TrustZone Date: Thu, 12 Mar 2015 16:05:30 +0900 From: JaeminPark <jmpark81@...9...> To: martin.stein@...1... Dear, I’m writing this e-mail to ask you some questions to build and boot Genode with TrustZone into FreeScales iMX53 QSB. According to the article in https://sourceforge.net/p/genode/mailman/message/33584768/, I could build and boot (maybe) Genode in my iMX53 board. Through the serial, I only could see the log as bellow : /…/ /Starting kernel …/ / / /kernel initialized/ /Genode 15.02/ /init main() : — create local services —/ /…/ /[init -> tz_vmm] Start virtual machine…/ After this log, I could see only blinking prompt. Is this successful boot of Genode with TrustZone? If possible, can you provide me with successful log on iMX53 QSB? Furthermore, I’d like to boot guest OS (normal world OS) after booting up Genode with TrustZone. Is there any way for this? I’m looking forward to your response, and thank you very much in advance. My Best Regards, Jaemin Park Park, Jae Min Member of Engineering Staff System R&D Division, The Attached Institute of ETRI Tel : +82-42-870-4757 Mobile : +82-10-3109-2658 jmpark@...312... <mailto:jmpark@...312...>, jmpark81@...9... <mailto:jmpark81@...9...> http://jmpark81.wordpress.com/about

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Re: SMC on i.mx6
by Vincent Raes 12 Mar '15

12 Mar '15

Hello, Thank you for the advice. I performed some checks to see in what exact mode the 'smc' instruction is executed and it is supervisor mode which is a privileged mode so no problems there. This leads me to believe there is indeed something which goes wrong with the instruction itself. Since I do not have access to a JTAG debugger, trying to find out what kind of exceptions are taken seems to be the best course of action. As for what stop means, it is literally just that, it stops. I get all the output I would expect right up to the point where the 'smc' instruction is issued. After that, nothing happens. At least not in the normal world since I have tried running a different thread next to the one that performs the hypercall. This secondary thread should periodically print some output but remains silent all the time. The secure world does not give any signs of life either which is the main reason I'm posting here. As far as I can see, this non responsiveness from the secure world may make it hard to get the base-hw kernel that's running there to actually see what exception is taken but I'll give it a shot. And I am using 2 different genode kernels in the secure and normal world. The normal kernel is treated like the Linux kernel in the tz_vmm example. I simply manually place the binary image of the kernel in the bin folder so the run script can package it with the secure kernel. Best regards, Vincent On 03/12/2015 07:48 AM, Stefan Kalkowski wrote: >Hello Vincent, > >On 03/11/2015 08:44 PM, Vincent Raes wrote: >> Hello, >> >> I am facing some issues with the 'SMC' instruction on the i.mx6. >> I can run the tz_vmm example, based on the veax9 code since they both >> have a TZASC, on the board and the world switch from secure to normal >> world works as intended. However when trying to switch back from normal >> world to secure world, execution simply hangs after the 'smc' assembler >> instruction. >> It was my understanding that this instruction should trap to the secure >> world and then the tz_vmm continues to work with that. In my case >> everything simply stops. > > That is right, the 'smc' instruction should provoke an exception taken > to the secure world's exception vector. Are you sure that the > instruction is executed in the normal world? What does stop mean? To get > a picture what is going on you either need to debug it via a JTAG > debugger, or by instrumenting the base-hw kernel of the secure-side to > see what kind of exceptions are taken. A good starting-point would be > the 'Kernel::Vm' class' 'exception' function. In Genode 15.02 you can > find this function in here: > > > https://github.com/genodelabs/genode/blob/master/repos/base-hw/src/core/spe… > > If you use another version, you have to grep for it. > >> >> I am using Genode in both normal and secure world since I'm mainly going >> for a proof of concept at this point. In order to execute the 'smc' >> instruction, I implemented a public syscall so the kernel will be the >> one to give the command which should ensure that the processor is in a >> privileged mode when completing the call. >> >> Should I perhaps add a new core service to base-hw to make the call to >> the kernel? And if so, are there any pointers as to how to go about >> this? The only real advantage this method offers as far as I can see is >> that it is better for Genode's access control policy and gives more >> control to which applications can call for the 'smc' instruction. >> > > The other possibility why it doesn't work would be that the 'smc' > instruction is not really executed in privileged mode. To be really sure > about it, you might print the CPSR register and have a look at the five > least-significant bits to validate the current mode. > > Having a public syscall that is not private to core should not be the > problem in here. That is more a question of the desired architecture, > but it should function in both ways. > > Just out of curiosity: if you use Genode on both sides of the TrustZone, > do you use one and the same kernel/core for both worlds? And if so, how > do you distinguish between both when booting the kernel? > > Regards > Stefan > >> >> Best regards, >> Vincent >> >> >> ------------------------------------------------------------------------------ >> Dive into the World of Parallel Programming The Go Parallel Website, sponsored >> by Intel and developed in partnership with Slashdot Media, is your hub for all >> things parallel software development, from weekly thought leadership blogs to >> news, videos, case studies, tutorials and more. Take a look and join the >> conversation now. http://goparallel.sourceforge.net/ >> >> >> >> _______________________________________________ >> genode-main mailing list >> genode-main@...52... >> https://lists.sourceforge.net/lists/listinfo/genode-main >> > > -- > Stefan Kalkowski > Genode Labs > > http://www.genode-labs.com/ · http://genode.org/

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How can I port Genode to Exynos4 platform?
by pyl 12 Mar '15

12 Mar '15

Hi everyone, I can run genode(base-foc) on the Pandaboard ES, and now I want to port genode to Odroid-Q2(exynos4412), but there is no script to run , I don't know what need I do and how to configure genode to make it work on Odroid. Can you help me? Thanks Cooper

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An in-depth look into the ARM virtualization extensions
by Stefan Kalkowski 12 Mar '15

12 Mar '15

Hello everyone, as already announced, Genode's recent release 15.02 introduces virtualization support for ARM to our custom base-hw kernel. Due to the brisk demand regarding our prior article about ARM TrustZone, we decided to provide in-depth information about our virtualization work again. If you are interested in this topic, you may consider the following article, which was published right now: http://genode.org/documentation/articles/arm_virtualization I hope it provides a helpful insight into ARM virtualization in general and our related work in particular. Best regards Stefan -- Stefan Kalkowski Genode Labs http://www.genode-labs.com/ · http://genode.org/

1 0

Progress of bringing Genode to seL4
by Norman Feske 12 Mar '15

12 Mar '15

Hello, I have written up the first of a series of articles about using seL4 as base platform for the Genode OS framework: http://genode.org/documentation/articles/sel4_part_1 I hope that it contains useful bits of information for novices of seL4 and Genode alike. Even though the article outlines a few hurdles, the overall experience of using the kernel had been overly positive so far. For those of you interested in tracking the progress of the ongoing work, here is the corresponding topic branch: https://github.com/nfeske/genode/commits/sel4 Cheers Norman -- Dr.-Ing. Norman Feske Genode Labs http://www.genode-labs.com · http://genode.org Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

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SMC on i.mx6
by Vincent Raes 12 Mar '15

12 Mar '15

Hello, I am facing some issues with the 'SMC' instruction on the i.mx6. I can run the tz_vmm example, based on the veax9 code since they both have a TZASC, on the board and the world switch from secure to normal world works as intended. However when trying to switch back from normal world to secure world, execution simply hangs after the 'smc' assembler instruction. It was my understanding that this instruction should trap to the secure world and then the tz_vmm continues to work with that. In my case everything simply stops. I am using Genode in both normal and secure world since I'm mainly going for a proof of concept at this point. In order to execute the 'smc' instruction, I implemented a public syscall so the kernel will be the one to give the command which should ensure that the processor is in a privileged mode when completing the call. Should I perhaps add a new core service to base-hw to make the call to the kernel? And if so, are there any pointers as to how to go about this? The only real advantage this method offers as far as I can see is that it is better for Genode's access control policy and gives more control to which applications can call for the 'smc' instruction. Best regards, Vincent

2 1

imx53 trustzone boot problem
by Ofer Hasson 12 Mar '15

12 Mar '15

Hello, I'm trying to boot genode on the secure world and linux on normal world of the iMX53-QSB board (freescale). The problem I'm encountering is: [init -> tz_vmm] Start virtual machine ... and then various errors, either it hangs, or undefined instruction, or Pagefault in core thread (pager_activation): ip=70055228 fault=20ef8904 failed to communicate thread event My steps leading to this: Downloaded http://genode.org/files/images/imx53_qsb/initrd.gz and cloned https://github.com/skalk/linux.git git checkout imx53-tz Kernel compile: using http://www.codesourcery.com/sgpp/lite/arm/portal/package4573/public/arm-non… make CROSS_COMPILE=/opt/codesourcery/bin/arm-none-linux-gnueabi- ARCH=arm imx5_android_tz_defconfig make CROSS_COMPILE=/opt/codesourcery/bin/arm-none-linux-gnueabi- ARCH=arm uImage copied the initrd and uImage into the micro sd card, changed the name of uImage into linux I cloned https://github.com/genodelabs/genode.git working on the master branch, current commit hash: 54ef87c Created build directory: tool/create_builddir hw_imx53_qsb_tz BUILD_DIR=hw_imx53_qsb_tz I added "SPECS += trustzone" to etc/specs.conf in the build directory Compiled: make run/tz_vmm Created u-boot image: /opt/gcc-linaro-arm-none-eabi-4.9-2014.09_linux/bin/arm-none-eabi-objcopy -O binary var/run/tz_vmm/image.elf var/run/tz_vmm/image.bin mkimage -A arm -O linux -T kernel -C none -a 0x70010000 -e 0x70010000 -d var/run/tz_vmm/image.bin var/run/tz_vmm/uImage Next, i copy the image to the micro sd card. On the u-boot shell: ext2load mmc 0:1 0x71000000 uImage bootm 0x71000000 OUTPUT: ## Booting kernel from Legacy Image at 71000000 ... Image Name: Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 9355264 Bytes = 8.9 MiB Load Address: 70010000 Entry Point: 70010000 Verifying Checksum ... OK Loading Kernel Image ... OK Starting kernel ... kernel initialized Genode 15.02 <local changes> int main(): --- create local services --- int main(): --- start init --- In Rom_connection(): /home/hassonof/arm-tz/devel/boards/iMX53/genode-original/repos/base/include/rom_session/con7 filename = init, label = <NULL> int main(): transferred 246 MB to init int main(): --- init created, waiting for exit condition --- [init] Could not open file "ld.lib.so" [init] In Rom_connection(): /home/hassonof/arm-tz/devel/boards/iMX53/genode-original/repos/base/include/rom_sess7 [init] filename = config, label = <NULL> [init] parent provides [init] service "ROM" [init] service "RAM" [init] service "IRQ" [init] service "IO_MEM" [init] service "CAP" [init] service "PD" [init] service "RM" [init] service "CPU" [init] service "LOG" [init] service "SIGNAL" [init] service "VM" [init] In Rom_connection(): /home/hassonof/arm-tz/devel/boards/iMX53/genode-original/repos/base/include/rom_sess7 [init] filename = tz_vmm, label = tz_vmm [init] child "tz_vmm" [init] RAM quota: 3932160 [init] ELF binary: tz_vmm [init] priority: 0 [init -> tz_vmm] Start virtual machine ... and then errors described at the beginning. I was looking in the code and dumping some output to find the problem, at repos/os/src/server/tz_vmm/include/vm_base.h: _load_kernel() function, at lines #52-53 the memcpy crashes. the arguments being passed to him are: destination: 80008000 source: f0001000, size: 3203072 what am i doing wrong ? Thanks Ofer

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base-hw: Cpu_lazy_state and alignment constraints
by Adrian-Ken Rueegsegger 10 Mar '15

10 Mar '15

Hello, While implementing lazy FPU loading/storing for the x86 base-hw port I came across an issue with regards to data structure alignment. The implementation is similar to the one of base-hw cortex A9 and uses the Cpu_lazy_state class to store the FPU state, see [1]. To use the fx[save|rstor] instructions, the storage area must be 16-byte aligned which I set as alignment of the Cpu_lazy_state class [2]. Checking the alignment of the data structure during runtime showed however, that the constraint is not correctly adhered to. I suspect that the Kernel::Cpu_job class, which contains the lazy state [3], is allocated without consideration for the required alignment. I have worked around the issue by manually ensuring the correct alignment [4] but I consider it a hack would like to get rid of it. Since I am not quite sure how Cpu_job is allocated and what its life cycle looks like, I would be glad if someone could give me some pointers to verify my suspicion and give a suggestion on how one would go about ensuring the proper alignment of all instances of Cpu_lazy_state. Regards, Adrian [1] - https://github.com/codelabs-ch/genode/blob/9a2a85c807a695a91088b6ab6e0d0de4… [2] - https://github.com/codelabs-ch/genode/blob/9a2a85c807a695a91088b6ab6e0d0de4… [3] - https://github.com/codelabs-ch/genode/blob/hw_x86-fpu/repos/base-hw/src/cor… [4] - https://github.com/codelabs-ch/genode/commit/996ffa6407effaa45488ddf3e41986…

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Re: Documentation - request for feedback
by Norman Feske 09 Mar '15

09 Mar '15

Hi Stephan, > My experience with such documentation (considering that I am maintaining > a 1500+ design documentation of the Linux kernel) is that references to > the code are helpful. For example: when you talk about a capability in > section 3.1, just add a hint which C++ object such capability is stored > in. With this, a reader now as an entry into the code and can start to > understand the code. > > Note, I am not looking for comprehensive code snippets -- just a > reference to the code structs / objects. that is a good advice. I actually deliberately tried to keep Chapter 3 void of "implementation smell" to avoid distracting the reader from understanding the architectural concepts. But I agree that the reader might desire to the draw the connection to the actual code. Would the addition of cross references to the corresponding subsections of Chapter 7 (Functional specification) achieve the desired effect? Chapter 7 will contain the actual API documentation (of course referring to the source code). This way, the text in Chapter 3 would not directly but indirectly refer to the source code. Best regards Norman -- Dr.-Ing. Norman Feske Genode Labs http://www.genode-labs.com · http://genode.org Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

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