On Thu, 29 Feb 2024 at 14:17, Heinrich Schuchardt <heinrich.schucha...@canonical.com> wrote: > > On 29.02.24 13:34, Peter Maydell wrote: > > On Thu, 29 Feb 2024 at 11:17, Heinrich Schuchardt > > <heinrich.schucha...@canonical.com> wrote: > >>> But yes, I'm not surprised that CXL runs into this. Heinrich, > >>> are you doing CXL testing, or is this some other workload? > >> > >> I am running the UEFI Self-Certification Tests (SCT) on EDK 2 using: > >> > >> qemu-system-riscv64 \ > >> -M virt,acpi=off -accel tcg -m 4096 \ > >> -serial mon:stdio \ > >> -device virtio-gpu-pci \ > >> -device qemu-xhci \ > >> -device usb-kbd \ > >> -drive > >> if=pflash,format=raw,unit=0,file=RISCV_VIRT_CODE.fd,readonly=on \ > >> -drive if=pflash,format=raw,unit=1,file=RISCV_VIRT_VARS.fd \ > >> -drive file=sct.img,format=raw,if=virtio \ > >> -device virtio-net-device,netdev=net0 \ > >> -netdev user,id=net0 > >> > >> This does not invoke any CXL related stuff. > > > > Hmm, that doesn't seem like it ought to be running into this. > > What underlying memory region is the guest trying to do > > the virtio queue access to?
> The error occurs while the SCT is executing function > BBTestReadBlocksConformanceAutoTest > (https://github.com/tianocore/edk2-test/blob/cabb98d44be94e7547605435a0be7c4946d10f8b/uefi-sct/SctPkg/TestCase/UEFI/EFI/Protocol/BlockIo/BlackBoxTest/BlockIoBBTestConformance.c#L45) > > This code is accessing the drive defined as > -drive file=sct.img,format=raw,if=virtio . > > In the conformance test correct error handling for invalid parameters of > the UEFI block IO protocol is tested. This includes calling the UEFI API to > > * read with incorrectly aligned buffers > * read with invalid LBA parameter > * read with buffer size not being a multiple of the sector size > > In all these cases the UEFI API implemented by EDK II is expected to > return an error. OK, but where is it actually reading/writing to ? Even if the buffer isn't aligned right it ought not to be in a non-host-ram-backed memory region, I would have thought. -- PMM