[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: libxl - b_info.{acpi,apic} behaves differently than b_info.u.hvm.{acpi,apic}
On Thu, Sep 10, 2020 at 12:41:04PM +0200, Roger Pau Monné wrote: > Adding toolstack maintainers. > > On Thu, Sep 10, 2020 at 12:29:21PM +0200, Marek Marczykowski-Górecki wrote: > > On Thu, Sep 10, 2020 at 10:51:48AM +0200, Roger Pau Monné wrote: > > > On Thu, Sep 10, 2020 at 05:57:23AM +0200, Marek Marczykowski-Górecki > > > wrote: > > > > Hi, > > > > > > > > After updating from Xen 4.13 to Xen 4.14 I have troubles starting any > > > > HVM: just after hvmloader saying "Invoking SeaBIOS" I get "(XEN) MMIO > > > > emulation failed (1): d29v0 32bit @ 0008:fffeedf d -> " > > > > > > > > I come to a situation where seemingly the same domU started via xl > > > > works, while when started via libvirt it crashes. This seems to be > > > > related to xl setting b_info.{acpi,apic}, while libvirt setting > > > > b_info.u.hvm.{acpi,apic}. Modifying libvirt to use the former fixes the > > > > issue. > > > > > > Could you print the values of the involved fields at the end of > > > libxl__domain_build_info_setdefault in both cases? > > > > > > I'm not able to spot what changed between 4.13 and 4.14 that could > > > alter the behavior, but knowing the values at that point might make > > > it easier. > > > > Sure, will do. > > It may be also something else: maybe it acpi/apic settings were broken > > before, but did not results in a domU crash this way. > > FWIW when looking into /var/lib/xen/*-libxl-json I clearly see > > difference between b_info.{acpi,apic} and b_info.u.hvm.{acpi,apic}. > > I think libxl__domain_build_info_setdefault should check whether > b_info.u.hvm.{acpi,apic} is set and copy those into b_info.{acpi,apic} > if those are not set? Looking at libxl__domain_build_info_setdefault this is not the case. Instead there is libxl__acpi_defbool_val which looks at both. Oh, and there is no similar thing for apic -> b_info.u.hvm.apic is ignored! > Toolstack people is more likely to have an opinion here, or to help > debug the issue. -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? Attachment:
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