Hi Shrikanth, It appears I had missed out passing the correct virtio-scsi request size when enqueuing the request. I have now fixed that in the pull request at https://github.com/tianocore/edk2/pull/6038. Can you try the patch in the pull request at and let me know if it fixes the issue, please? Regards, Sami Mujawar From: Sami Mujawar Date: Thursday 1 August 2024 at 16:53 To: "devel@edk2.groups.io" , "srikanth.aithal@amd.com" , Ard Biesheuvel , Jiewen Yao , Gerd Hoffmann Subject: Re: [edk2-devel] Patch OvmfPkg: Use heap memory for virtio-scsi request causing regression Hi Srikanth, Thanks for reporting this issue. It is strange that the virtio-blk driver is working with a similar change. I am looking into why this may be failing. Regards, Sami Mujawar From: on behalf of "Aithal, Srikanth via groups.io" Reply to: "devel@edk2.groups.io" , "srikanth.aithal@amd.com" Date: Thursday 1 August 2024 at 12:28 To: "devel@edk2.groups.io" , Sami Mujawar , Ard Biesheuvel , Jiewen Yao , Gerd Hoffmann Subject: [edk2-devel] Patch OvmfPkg: Use heap memory for virtio-scsi request causing regression Resent from: Resent date: Thursday 1 August 2024 at 12:28 Hello all, After the patches [1fc55a39, b342070c] OvmfPkg: Use heap memory for virtio-blk request/OvmfPkg: Use heap memory for virtio-scsi request got merged, this regression is spotted. AMD SVM/SEV/SEVES guest boot fails with OVMF packages [Ia3264/X64] built from today's upstream edk2 repository[Head: 85fad99]. Guest boot with OVMF.fd or only with OVMF_CODE.fd gets stuck at below point: Divisor = 1 BaudRate/Actual (115200/115200) = 100% PciSioSerial: Create SIO child serial device - Device Error PlatformBootManagerAfterConsole Found Mass Storage device: PciRoot(0x0)/Pci(0x3,0x0) InstallProtocolInterface: FA920010-6785-4941-B6EC-498C579F160A 3DEB82A0 InstallProtocolInterface: 143B7632-B81B-4CB7-ABD3-B625A5B9BFFE 3DE10AA0 InstallProtocolInterface: 0167CCC4-D0F7-4F21-A3EF-9E64B7CDCE8B 3DE5D4A0 qemu-system-x86_64: wrong size for virtio-scsi headers <========== gets hung If both OVMF code and vars file are provided the issue is not hit. Qemu command line to recreate the issue: qemu-system-x86_64 \ -machine q35,kernel_irqchip=split \ -name guest=vm,debug-threads=on \ -drive if=pflash,format=raw,unit=0,file=OVMF_CODE.fd,readonly \ -cpu host \ -m 1024 \ -smp 1,cores=1,threads=1,dies=1,sockets=1 \ -kernel bzImage \ -append "root=/dev/sda rw console=ttyS0 net.ifnames=0 biosdevname=0 movable_node swiotlb=65536 " \ -drive id=disk0,file=22.04-server.qcow2,format=qcow2,if=none \ -device virtio-scsi-pci,id=scsi0,disable-legacy=on,iommu_platform=true \ -device scsi-hd,drive=disk0 \ --enable-kvm \ --nographic Thanks, Srikanth Aithal IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#120202): https://edk2.groups.io/g/devel/message/120202 Mute This Topic: https://groups.io/mt/107663187/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=-=-=-=-=-=-=-=-=-=-=-