On 2017-08-22 13:15, Gustavo Lima Chaves wrote: > * Gustavo Lima Chaves <[email protected]> [2017-08-22 16:36:54 > +0000]: > >> * Henning Schild <[email protected]> [2017-08-22 13:42:22 +0000]: >> >>> Am Mon, 21 Aug 2017 18:13:35 -0700 >>> schrieb Gustavo Lima Chaves <[email protected]>: >>> >>>> Hi, >>>> >>>> is testing xAPIC mode just a matter of having >>>> >>>> diff --git a/configs/qemu-vm.c b/configs/qemu-vm.c >>>> index e5a420a..6225be9 100644 >>>> --- a/configs/qemu-vm.c >>>> +++ b/configs/qemu-vm.c >>>> @@ -49,6 +49,7 @@ struct { >>>> .pci_mmconfig_end_bus = 0xff, >>>> .x86 = { >>>> .pm_timer_address = 0x608, >>>> + .apic_mode = >>>> JAILHOUSE_APIC_MODE_XAPIC, .vtd_interrupt_limit = 256, >>>> .iommu_units = { >>>> { >>>> >>>> ? If so, it gives me a segv right away, with >>>> >>>> Initializing Jailhouse hypervisor v0.7 (36-g0b1b884-dirty) on CPU 3 >>>> Code location: 0xfffffffff0000060 >>>> Using xAPIC >>>> Page pool usage after early setup: mem 44/1480, remap 65/131072 >>>> Initializing processors: >>>> CPU 3... (APIC ID 0) FAILED >>>> >>>> as output. >>>> >>>> Has anyone been testing that? >>> >>> Just talked to Andreas, he booted his root Linux in xapic mode to >>> inherit that for the non-root cell. Just add "nox2apic" to your host >>> Linux parameters. >> >> Interesting, because my issue was at jailhouse enable time, I did not >> even enter the merit of which inmate payload was used. But I'll check >> better what's happening, if the .apic_mode = 1 approach is really all >> that is needed. > > Gotta hate answering to emails before coffee. You said *base* kernel, > sorry. Will re-test.
Exactly: If the root Linux was brought up in xAPIC mode, Jailhouse has to follow this. Same in case it was using x2APIC before. We cannot switch the mode safely, so we follow what was configured before (auto mode) or defined in the config (like in your case). Jan -- 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.
