Hello, The following series aims to prevent local APIC errors from stalling the shtudown process. On XenServer testing we have seen reports of AMD boxes sporadically getting stuck in a spam of:
APIC error on CPU0: 00(08), Receive accept error Messages during shutdown, as a result of device interrupts targeting CPUs that are offline (and have the local APIC disabled). First patch strictly solves the issue of shutdown getting stuck, further patches aim to quiesce interrupts from all devices (known by Xen) as an attempt to prevent a spurious "APIC error on CPU0: 00(00)" plus also make kexec more reliable. Thanks, Roger. Roger Pau Monne (5): x86/shutdown: offline APs with interrupts disabled on all CPUs x86/irq: drop fixup_irqs() parameters x86/smp: perform disabling on interrupts ahead of AP shutdown x86/pci: disable MSI(-X) on all devices at shutdown x86/iommu: disable interrupts at shutdown xen/arch/x86/crash.c | 2 ++ xen/arch/x86/include/asm/irq.h | 4 +-- xen/arch/x86/include/asm/msi.h | 1 + xen/arch/x86/irq.c | 30 ++++++++----------- xen/arch/x86/msi.c | 18 +++++++++++ xen/arch/x86/smp.c | 33 +++++++++++++++------ xen/arch/x86/smpboot.c | 2 +- xen/drivers/passthrough/amd/iommu.h | 1 + xen/drivers/passthrough/amd/iommu_init.c | 17 +++++++++++ xen/drivers/passthrough/amd/pci_amd_iommu.c | 1 + xen/drivers/passthrough/iommu.c | 6 ++++ xen/drivers/passthrough/pci.c | 33 +++++++++++++++++++++ xen/drivers/passthrough/vtd/iommu.c | 19 ++++++++++++ xen/include/xen/iommu.h | 3 ++ xen/include/xen/pci.h | 4 +++ 15 files changed, 145 insertions(+), 29 deletions(-) -- 2.46.0
