diff options
Diffstat (limited to 'gitlab/issues_text/target_i386/host_missing/accel_KVM/2956')
| -rw-r--r-- | gitlab/issues_text/target_i386/host_missing/accel_KVM/2956 | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/gitlab/issues_text/target_i386/host_missing/accel_KVM/2956 b/gitlab/issues_text/target_i386/host_missing/accel_KVM/2956 deleted file mode 100644 index e01737681..000000000 --- a/gitlab/issues_text/target_i386/host_missing/accel_KVM/2956 +++ /dev/null @@ -1,214 +0,0 @@ -AMD SEV-SNP: vhost-user-fs-pci iommu_platform=true is not supported by the device -Description of problem: -Trying to make use of `vhost-user-fs-pci` with `sev-snp-guest` enabled doesn't work. -The system reports that `vhost-user-fs-pci` doesn't support IOMMU but as far as I understand -we need IOMMU for the virtio protocol to fully function. -Steps to reproduce: -1. Ensure you are running on a system with AMD SNP support: -``` -sudo dmesg | grep -i sev -[ 0.000000] SEV-SNP: RMP table physical range [0x000000bfbd000000 - 0x000000c07d8fffff] -[ 0.003807] SEV-SNP: Reserving start/end of RMP table on a 2MB boundary [0x000000c07d800000] -[ 8.085220] ccp 0000:06:00.5: sev enabled -[ 16.226155] ccp 0000:06:00.5: SEV API:1.55 build:28 -[ 16.226162] ccp 0000:06:00.5: SEV-SNP API:1.55 build:28 -[ 16.239284] kvm_amd: SEV enabled (ASIDs 15 - 1006) -[ 16.239289] kvm_amd: SEV-ES enabled (ASIDs 1 - 14) -[ 16.239292] kvm_amd: SEV-SNP enabled (ASIDs 1 - 14) -``` -2. Use an OVMF which supports AMD SNP: https://github.com/tianocore/edk2.git branch: edk2-stable202502 -3. Launch the virtiofs daemon process. -4. Launch qemu with device `vhost-user-fs-pci` -5. The qemu process will terminate with the following error message: - -``` -qemu-system-x86_64: -device vhost-user-fs-pci,chardev=fs0,tag=cfg: iommu_platform=true is not supported by the device -``` -Additional information: -It does launch if I disable any AMD SEV-SNP functionality from the VM: - -``` -sudo ./qemu-system-x86_64 \ - -nodefaults \ - -enable-kvm \ - -cpu host \ - -object memory-backend-memfd,id=mem0,size=2048M,share=on \ - -machine q35,memory-backend=mem0 \ - -smp cpus=1 \ - -drive file=ubuntu.qcow2,if=none,id=disk0,format=qcow2 \ - -device virtio-blk-pci,drive=disk0 \ - -device amd-iommu \ - -chardev socket,id=fs0,path=/var/run/virtiofs/cfg.sock \ - -device vhost-user-fs-pci,chardev=fs0,tag=cfg \ - -bios ./ovmf-dist/x86_64/OVMF.fd \ - -kernel ./linux-guest-6.12.15-1-/boot/vmlinuz-6.12.15-1 \ - -initrd ./initrd/initrd.img \ - -append 'console=ttyS0' \ - -display none - -nographic - -chardev stdio,id=stdio0,signal=off \ - -serial chardev:stdio0 \ - -D /tmp/qemu-vmm.log \ - -d 'guest_errors,unimp,trace:virtio*' -``` - -BTW: I've also managed to reproduce the same bug on AMD's fork: -- Repo: https://github.com/AMDESE/qemu.git -- Branch: snp-latest - -Configure flags: -``` - --target-list=x86_64-softmmu \ - --prefix=/builder/out/qemu-dist \ - --sysconfdir=/builder/out/qemu-dist/etc \ - --libdir=/builder/out/qemu-dist/lib \ - --libexecdir=/builder/out/qemu-dist/lib/qemu \ - --localstatedir=/builder/out/qemu-dist/var \ - --ninja=/usr/bin/ninja \ - --python=/usr/bin/python3 \ - --with-pkgversion=qemu \ - --cc=/usr/bin/x86_64-linux-gnu-gcc-13 \ - --static \ - --disable-cocoa \ - --disable-curses \ - --disable-dbus-display \ - --disable-gtk \ - --disable-gtk-clipboard \ - --disable-opengl \ - --disable-png \ - --disable-sdl \ - --disable-sdl-image \ - --disable-spice \ - --disable-spice-protocol \ - --disable-virglrenderer \ - --disable-vnc \ - --disable-vnc-jpeg \ - --disable-vnc-sasl \ - --disable-vte \ - --disable-alsa \ - --disable-coreaudio \ - --disable-dsound \ - --disable-jack \ - --disable-oss \ - --disable-pa \ - --disable-pipewire \ - --disable-sndio \ - --disable-vvfat \ - --disable-vdi \ - --disable-qed \ - --disable-qcow1 \ - --disable-bochs \ - --disable-cloop \ - --disable-dmg \ - --disable-parallels \ - --disable-vpc \ - --disable-vmdk \ - --disable-vhdx \ - --disable-bzip2 \ - --disable-lzfse \ - --disable-snappy \ - --disable-lzo \ - --disable-netmap \ - --disable-l2tpv3 \ - --disable-slirp-smbd \ - --disable-vde \ - --disable-vmnet \ - --disable-vhost-user-blk-server \ - --disable-vfio-user-server \ - --disable-curl \ - --disable-glusterfs \ - --disable-libiscsi \ - --disable-libnfs \ - --disable-libssh \ - --disable-mpath \ - --disable-rbd \ - --disable-vduse-blk-export \ - --disable-virtfs \ - --disable-fuse \ - --disable-fuse-lseek \ - --disable-blkio \ - --disable-nettle \ - --disable-gcrypt \ - --disable-gnutls \ - --disable-crypto-afalg \ - --disable-libkeyutils \ - --disable-libkeyutils \ - --disable-auth-pam \ - --disable-keyring \ - --disable-selinux \ - --disable-u2f \ - --disable-brlapi \ - --disable-canokey \ - --disable-hvf \ - --disable-hv-balloon \ - --disable-libdaxctl \ - --disable-libudev \ - --disable-libusb \ - --disable-nvmm \ - --disable-rdma \ - --disable-smartcard \ - --disable-usb-redir \ - --disable-whpx \ - --disable-xen \ - --disable-xen-pci-passthrough \ - --disable-guest-agent \ - --disable-guest-agent-msi \ - --disable-colo-proxy \ - --disable-rutabaga-gfx \ - --disable-vhost-crypto \ - --disable-capstone \ - --disable-docs \ - --disable-gettext \ - --disable-iconv \ - --disable-libdw \ - --disable-pixman \ - --disable-sparse \ - --disable-xkbcommon \ - --disable-attr \ - --disable-gio \ - --disable-multiprocess \ - --disable-plugins \ - --disable-qpl \ - --disable-replication \ - --disable-uadk \ - --disable-libvduse \ - --disable-libpmem \ - --disable-user \ - --disable-bsd-user \ - --disable-linux-user \ - --disable-tcg \ - --disable-debug-tcg \ - --disable-tcg-interpreter \ - --disable-hexagon-idef-parser \ - --disable-qom-cast-debug \ - --enable-kvm \ - --enable-system \ - --enable-pie \ - --enable-lto \ - --enable-af-xdp \ - --enable-slirp \ - --enable-vhost-kernel \ - --enable-vhost-net \ - --enable-vhost-user \ - --enable-vhost-vdpa \ - --enable-bpf \ - --enable-coroutine-pool \ - --enable-linux-aio \ - --enable-linux-io-uring \ - --enable-malloc-trim \ - --enable-membarrier \ - --enable-cap-ng \ - --enable-seccomp \ - --enable-stack-protector \ - --enable-tpm \ - --enable-zstd \ - --enable-numa \ - --enable-fdt=disabled \ - --enable-install-blobs \ - --enable-tools \ - --enable-trace-backends=log \ - --enable-strip \ - --x86-version=4 \ - --extra-cflags=-O2 -fno-semantic-interposition -fdevirtualize-at-ltrans -flto=auto -fuse-linker-plugin -falign-functions=32 -D_FORTIFY_SOURCE=2 -Wno-deprecated-declarations -Wno-error=stringop-overflow -Wformat -Werror=format-security -Werror=implicit-function-declaration -fstack-protector-strong -fstack-clash-protection -fcf-protection -fipa-pta \ - --extra-ldflags=-Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -Wl,-O1 -Wl,--as-needed -``` |