On 03.01.23 14:39, Jan-Marc Stranz wrote: > For the productive use of the hypervisor "Jailhouse" I am concerned > about another topic: "Sensitivity of the hypervisor configurations to HW > changes". > > I have already created the hypervisor configurations for 8 different x86 > HW targets (evaluation boards, industrial PC's, single board computers, > ...) for the root cell and for up to 2 guest cells. > > I also "cloned" some HW targets; however, I was scrupulously careful > that the HW (RAM, PCI devices, BIOS version, ...) was identical. > > To duplicate an x86 HW target, in my experience, the following > components must remain the same so that the hypervisor configurations > already created can still be used: > > 1. CPU model and architecture > 2. RAM memory size > 3. PCI devices (including M.2 NVME SSD!) > 4. BIOS version > > For mass production based on a Single Board Computer (SBC) some points > can easily be kept (e.g. CPU model and architecture, PCI devices (except > M.2 NVME SSD), BIOS version). > > On the other hand, you can't guarantee that you can always use the same > type for the M.2 NVME SSD, for example. > However, the change of the type of the M.2 NVME SSD, which is actually > imperceptible for the user, will possibly be noticeable in the > hypervisor configuration (e.g. different PCI capabilities). > > Another problem is the deviations that creep into memory and I/O layouts. > > Are there any experiences and practical solutions regarding this topic? > I would appreciate any advice on this! >
As I suggested offline already: If you don't have control over checking new hardware combinations /before/ they go into production, I would consider adding a post-production check that runs 'jailhouse config create' on the device (or outside, against what 'jailhouse config collect' provided) and compares the generated reference config against an earlier version. On deviations, an engineer would have to look at the details. Jan -- Siemens AG, Technology 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/fecd57a3-ce2d-f2ff-d2a0-a1d70fdfb43c%40siemens.com.
