On Thu, 22 Aug 2019 at 10:40, Zhanghailiang <zhang.zhanghaili...@huawei.com> wrote: > > Hi All, > > > > We caught an ‘Synchronous Exception’ error while booting VM with uefi > firmware in the avocado-vt tests. > > The Edk2 version we used is edk2-stable201905. The qemu version is qemu-4.0.0 > and kernel version is 4.19.0. > > Parts of the log we got from serial is bellow, you can get the full log from > attachment. > > We can easily reproduce this issue with running avocado-vt tests. Actually, > we tried the new edk2 from upstream, > > It is still can be reproduced. > > > > Reproduce command: > > # avocado run type_specific.io-github-autotest-qemu.qmp_event_notification > --vt-type qemu --vt-guest-os Guest.Linux.Fedora.29 > > > > Qemu command is : > .. > > It reports that this is a alignment fault from log, We analyzed the callstack > from log: > > VirtioScsiPassThru-> > VirtioFlush->virtio10SetQueueNotify->Virtio10Transfer->PciIoMemWrite-> > CpuMemoryServiceWrite-> MmioWrite32 <- here, the address is not align. >
The faulting address ends in 0x16, so the access is to the QueueSelect field in VIRTIO_PCI_COMMON_CFG. This is a UINT16 field, so the access should be 16-bit not 32-bits wide. Could you dump the instructions leading up to the first Virtio10Transfer() call in Virtio10SetQueueNotify()? (from Build/ArmVirtQemu-AARCH64/DEBUG_GCC49/AARCH64/OvmfPkg/Virtio10Dxe/Virtio10/DEBUG/Virtio10.dll) 2280: aa0103e5 mov x5, x1 2284: d2800044 mov x4, #0x2 // #2 2288: d28002c3 mov x3, #0x16 // #22 228c: 52800002 mov w2, #0x0 // #0 2290: aa0003e1 mov x1, x0 2294: aa0603e0 mov x0, x6 2298: 97fffcf3 bl 1664 <Virtio10Transfer> If the size is passed correctly here, we'll have to track down how the call gets routed to Mmio32Write instead of Mmio16Write(). Do you have any patches on top of edk2-stable-201905 ? -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#46209): https://edk2.groups.io/g/devel/message/46209 Mute This Topic: https://groups.io/mt/32987799/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-