Re: x2apic issues with Solaris and Xen guests
On 2015-04-20 19:07, Stefan Hajnoczi wrote: I wonder whether the following two x2apic issues are related: Solaris 10 U11 network doesn't work https://bugzilla.redhat.com/show_bug.cgi?id=1040500 kvm - fails to setup timer interrupt via io-apic (Thanks to Michael Tokarev for posting this link) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=528077#68 It seems KVM's x2apic emulation works with regular Linux and Windows guests, but not necessarily with other OSes. KVM's x2apic is kind of paravirtual - without VT-d interrupt remapping. That may confuse the guest, though it should work. But Xen already refuses to pick it according to the second report: | (XEN) Not enabling x2APIC: depends on iommu_supports_eim. Has anyone looked into this? Not yet. Is there a handy reproduction guest image? Or maybe someone would like to start with tracing what the guest and the host do. Jan signature.asc Description: OpenPGP digital signature
Re: x2apic issues with Solaris and Xen guests
20.04.2015 20:29, Jan Kiszka wrote: On 2015-04-20 19:07, Stefan Hajnoczi wrote: I wonder whether the following two x2apic issues are related: Solaris 10 U11 network doesn't work https://bugzilla.redhat.com/show_bug.cgi?id=1040500 kvm - fails to setup timer interrupt via io-apic (Thanks to Michael Tokarev for posting this link) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=528077#68 [] Has anyone looked into this? Not yet. Is there a handy reproduction guest image? Or maybe someone would like to start with tracing what the guest and the host do. The second link gives a trivial reproducer, you need just the xen hipervisor binary and some kernel. This should be easy too, because it happens right on boot. But I guess it requires some inner knowlege of xen early boot machinery. Thanks, /mjt -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
x2apic issues with Solaris and Xen guests
I wonder whether the following two x2apic issues are related: Solaris 10 U11 network doesn't work https://bugzilla.redhat.com/show_bug.cgi?id=1040500 kvm - fails to setup timer interrupt via io-apic (Thanks to Michael Tokarev for posting this link) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=528077#68 It seems KVM's x2apic emulation works with regular Linux and Windows guests, but not necessarily with other OSes. Has anyone looked into this? Stefan -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: x2apic issues with Solaris and Xen guests
Michael Tokarev m...@tls.msk.ru writes: 20.04.2015 20:29, Jan Kiszka wrote: On 2015-04-20 19:07, Stefan Hajnoczi wrote: I wonder whether the following two x2apic issues are related: Solaris 10 U11 network doesn't work https://bugzilla.redhat.com/show_bug.cgi?id=1040500 kvm - fails to setup timer interrupt via io-apic (Thanks to Michael Tokarev for posting this link) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=528077#68 [] Has anyone looked into this? Not yet. Is there a handy reproduction guest image? Or maybe someone would like to start with tracing what the guest and the host do. The second link gives a trivial reproducer, you need just the xen hipervisor binary and some kernel. This should be easy too, because it happens right on boot. But I guess it requires some inner knowlege of xen early boot machinery. Have you tried Radim's patch ? commit c806a6ad35bfa6c92249cd0ca4772d5ac3f8cb68 Author: Radim Krčmář rkrc...@redhat.com Date: Wed Mar 18 19:38:22 2015 +0100 KVM: x86: call irq notifiers with directed EOI Thanks, /mjt -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
