http://bugzilla.opensuse.org/show_bug.cgi?id=1210172 Bug ID: 1210172 Summary: emulated CXL memory device is not seen in qemu/kvm guest Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: Other OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Virtualization:Other Assignee: virt-bugs@suse.de Reporter: vliaskovitis@suse.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- Created attachment 866151 --> http://bugzilla.opensuse.org/attachment.cgi?id=866151&action=edit guest xml with CXL controller/rootport/device added Tumbleweed Guest: opensuse kernel 6.1.8 Tumbleweed Host: qemu-7.1.0-8.1.x86_64 Using simplest (first) CXL setup from: https://www.qemu.org/docs/master/system/devices/cxl.html#example-command-lin... i.e. single host controller, single root port, one directly attached CXL Type 3 device. The qemu arguments are added to libvirt xml manually. I am also attaching the full libvirt xml for this domain. Result: No CXL mem devices are seen in the guest Expected result: One device is expected to be seen cxl list -M Warning: no matching devices found [ ] Guest kernel booted with Booted with acpi.debug_layer=0xf acpi.debug_level=0xffff dmesg | grep -i cxl [ 0.184343] uteval-0063 ut_evaluate_object : [CXLM._UID] was not found [ 0.184345] uteval-0063 ut_evaluate_object : [CXLM._CID] was not found [ 0.184347] uteval-0063 ut_evaluate_object : [CXLM._CLS] was not found [ 0.184349] uteval-0063 ut_evaluate_object : [CXLM._ADR] was not found [ 0.184351] uteval-0063 ut_evaluate_object : [CXLM._S0W] was not found [ 0.184353] uteval-0063 ut_evaluate_object : [CXLM._S1W] was not found [ 0.184354] uteval-0063 ut_evaluate_object : [CXLM._S2W] was not found [ 0.184358] uteval-0063 ut_evaluate_object : [CXLM._S3W] was not found [ 0.184360] uteval-0063 ut_evaluate_object : [CXLM._S4W] was not found [ 0.184362] uteval-0063 ut_evaluate_object : [CXLM._S1D] was not found [ 0.184363] uteval-0063 ut_evaluate_object : [CXLM._S2D] was not found [ 0.184365] uteval-0063 ut_evaluate_object : [CXLM._S3D] was not found [ 0.184367] uteval-0063 ut_evaluate_object : [CXLM._S4D] was not found [ 0.416804] acpi ACPI0016:00: _OSC: OS supports [CXL11PortRegAccess CXL20PortDevRegAccess CXLProtocolErrorReporting CXLNativeHot] [ 0.416995] acpi ACPI0016:00: _OSC: OS now controls [CXLMemErrorReporting] [ 0.894536] uteval-0063 ut_evaluate_object : [CXLM._CID] was not found [ 33.648449] cxl_acpi: probe of ACPI0017:00 failed with error -22 -22 is EINVAL. It is likely that the missing ACPI object/method: [CXLM._CID] was not found is causing the error. cat /boot/config-6.2.9-1-default | grep -i CXL CONFIG_CXL_BUS=m CONFIG_CXL_PCI=m # CONFIG_CXL_MEM_RAW_COMMANDS is not set CONFIG_CXL_ACPI=m CONFIG_CXL_PMEM=m CONFIG_CXL_MEM=m CONFIG_CXL_PORT=m CONFIG_CXL_SUSPEND=y CONFIG_CXL_REGION=y # CONFIG_CXL_REGION_INVALIDATION_TEST is not set This is likely a qemu issue or a guest kernel issue. I have not yet found an obviously missing patch (in qemu or kernel) regarding the ACPI CXLM._CID object. If someone can reproduce the issue, or conversely succeed in seeing the emulated CXL mem device, please share. -- You are receiving this mail because: You are on the CC list for the bug.