On Wed, Aug 02, 2023 at 03:57:17PM +0200, Thomas Huth wrote: > The intel-iommu device is currently unusable on big endian hosts. > When doing something like this on a s390x host: > > wget > https://download.fedoraproject.org/pub/fedora/linux/releases/38/Server/x86_64/images/Fedora-Server-KVM-38-1.6.x86_64.qcow2 > ./qemu-system-x86_64 -M q35 -device intel-iommu -m 2G \ > -hda ~/Fedora-Server-KVM-38-1.6.x86_64.qcow2 -trace "vtd_*" > > ... the guest kernel crashes during boot, complaining about some > problems with the iommu, and you can see clearly in the traces that > some values are wrong when compared to running this on a x86 host. > > After spending quite some time hunting down the problems one by one, > I think I now found them all - at least I can successfully boot the > above kernel after I applied these patches. > > Thomas Huth (6): > hw/i386/intel_iommu: Fix trivial endianness problems > hw/i386/intel_iommu: Fix endianness problems related to > VTD_IR_TableEntry > hw/i386/intel_iommu: Fix struct VTDInvDescIEC on big endian hosts > hw/i386/intel_iommu: Fix index calculation in > vtd_interrupt_remap_msi() > hw/i386/x86-iommu: Fix endianness issue in > x86_iommu_irq_to_msi_message() > include/hw/i386/x86-iommu: Fix struct X86IOMMU_MSIMessage for big > endian hosts
All look right here. This was the 1st project I did after I worked on QEMU, thanks again for fixing the issues for years! Reviewed-by: Peter Xu <pet...@redhat.com> This will need to be 8.2 material though, am I right? Thanks, -- Peter Xu
