Hi Vitaly, On 04/12/2017 07:54 PM, Vitaly Andrianov wrote: > > On 04/12/2017 11:11 AM, Jan Kiszka wrote: >> Hi Vitaly, >> >> On 2017-04-12 16:57, Vitaly Andrianov wrote: >>> Hi Jan, >>> >>> Most of inmate configurations for ARM platform has RAM .virt_start = >>> 0x0. Is that a requirement? >> >> The reset vector is 0x0, so there should be some code at that location >> when the inmate wants to start. Can be a fraction of the RAM, though, >> just to carry some bootstrap page if you prefer. >> >>> >>> A while ago I tried to make an inmate with .virt_start = 0x80000000 and >>> couldn't load the inmate. I wondering if that is an issue with my >>> configuration or a Jailhouse limitation. I'm working on porting a AM572x >>> TI-RTOS based application to run as inmate and for me that is a big >>> limitation (if that is a real limitation but not my bug). A typical >>> TI-RTOS application has MMU enabled with identical one-to-one mapping of >>> the entire DDR (0x80000000-0xffffffff). And the binary entry is >>> somewhere at the beginning of that range. >>> >>> I saw couple of linux-demo configuration files with .virt_start != 0x0. >>> Does jailhouse care the .virt_start != 0x0 in some special way? Or I >>> just have some issue with my configuration? >> >> In case of Linux, you can see that there is always at least one small >> region at virt_start 0 as well. That is were our linux-loader.bin is >> put. It does not need identity mapping as it does not do any DMA. >> >> Jan >> > Hi Jan, > > Sorry, I'm confused. From Ralf's reply I understood that I can link my > inmate to not zero address (in my case I use beginning of the DDR - > 0x80000000) and set .virt_start to the same address. Also I placed > vector table to the beginning of the image, so the entry point is the > start of the binary. I understood that configuration should work. Sorry for the confusion, Jan is right, please let me amend:
Currently, relocating inmates is not sufficent, their entry point or reset vector would have to be changed as well. Jailhouse currently jumps to guest-phys 0x0. Ralf > > From your reply I understood that I have to make at least a small > section located at the virt_start = 0x0 address. Is that really necessary? > > Thanks, > Vitaly > > > > -- You received this message because you are subscribed to the Google Groups "Jailhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
