> Subject: Re: [PATCH 00/10] ARM64: boot jailhouse before root cell linux > > On 07.08.20 05:06, [email protected] wrote: > > From: Peng Fan <[email protected]> > > > > This patchset is to support boot jailhouse before Linux. > > The previous RFC patchset: > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgrou > > > ps.google.com%2Fg%2Fjailhouse-dev%2Fc%2FIZEFz-e2lh4%2Fm%2FBBmGI_s > pIQAJ > > > &data=02%7C01%7Cpeng.fan%40nxp.com%7Cfd19d34344a04a8e00690 > 8d83dca6 > > > d2b%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637327286910 > 022610&am > > > p;sdata=LWalmGgc5itX1A9VYPlJHE8zRst1XiL2lSilgI2z%2F4U%3D&reserv > ed= > > 0 > > > > Patch 1~6 is to create an new folder libbaremetal to hold files that > > could shared between inmates and new bootloader. > > > > Patch 9 is the central part to boot jailhouse with a baremetal > > bootloader, which only support ARM64 + GIC_V3 now. It will use psci to > > power up secondary cores, do GIC_V3 dist initialization, Then kick > > inmate cell. > > > > Images/cells loading is done by U-Boot bootm command to boot a fit image. > > > > Patch 10 is to support using jailhouse userspace tool even boot > > jailhouse before linux, just do as "insmod jailhouse.ko > > early_loader=1", then it will bypass fw loading and etc, but setup > information for linux usage. > > > > I'm missing the big picture description here: > - how is the memory structure that the boot loader needs to set up?
Nothing special, just put the cells/inmates to the fit file, as 8mm.its. > - how is the handover between loader and root linux? Nothing special, the boot args are reserved when U-Boot kick the loader, the loader will pass the args to Linux after jailhouse initialization done. > - how are things configured? > > From a first glance at the code, it seems a lot of things are still > hard-coded, > likely imx8-specific. That may mean we need to work on the user story > further. I use bootloader/include/config.h to define some addresses. Since I using Fit image, do you think it is good to parse fit image to get out the info? This will need porting code from U-Boot or write from scratch. > > Also, a qemu-arm64 target would be good. Per my understanding, qemu-arm64 to run jailhouse not have U-Boot. I need to let U-Boot boot Linux, then could add the feature. Regards, Peng. > > Jan > > -- > Siemens AG, Corporate Technology, CT RDA IOT SES-DE Corporate > Competence Center Embedded Linux -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/jailhouse-dev/AM5PR0402MB275606FED01836E49F644C2E88450%40AM5PR0402MB2756.eurprd04.prod.outlook.com.
