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Diffstat (limited to 'gitlab/issues_text/target_i386/host_missing/accel_KVM/2669')
| -rw-r--r-- | gitlab/issues_text/target_i386/host_missing/accel_KVM/2669 | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/gitlab/issues_text/target_i386/host_missing/accel_KVM/2669 b/gitlab/issues_text/target_i386/host_missing/accel_KVM/2669 deleted file mode 100644 index 026572f88..000000000 --- a/gitlab/issues_text/target_i386/host_missing/accel_KVM/2669 +++ /dev/null @@ -1,18 +0,0 @@ -CPU Hotplug (Host Model) Causes the Windows VM to BSOD -Description of problem: -The QEMU runs on a host with the Intel(R) Xeon(R) CPU E3-1230 v6 CPU which supports Software Guard Extension (SGX). I start a VM with Windows Server 2019 inside and with `-cpu host,...`. When I attempts to hotplug additional CPU (when the VM is running), the OS issues a bug check 0x3e (`MULTIPROCESSOR_CONFIGURATION_NOT_SUPPORTED`). The problem is that the newly hotplugged CPU is not evaluated as "equivalent enough" compared to the already present CPUs. I did some more digging and reverse engineering and it looks like the CPU being hotplugged has SGX turned off. This seems to be fixed when the VM reboots. - -I tried to disable SGX through `-cpu host,-sgx` which helps (the VM successfully accepts the hotplugged CPU), however, `+sgx` does not help (seems to have no effect on the CPU being hotplugged). - -My goal is to be able to hotplug CPUs even when the host CPU supports SGX. - -I tested with QEMU 8.0.0, 9.1.0, 9.1.1 and 9.1.50 (current master) but with no luck. -Steps to reproduce: -1. Create a simple Windows VM, -2. start the VM, -3. use `qpm-shell` to hotplug a CPU (https://www.qemu.org/docs/master/system/cpu-hotplug.html). - -I can provide you the VM as well but its image (QCOW2) has around 10G in size. - -Best regards -Martin Dráb |