Hi, I am trying to do Intel Processor Tracing (Intel PT) from within a KVM guest VM started with `-cpu host`. However, I cannot find the `/sys/devices/intel_pt` device in the VM, which exists on the host. I compared the output of `cat /proc/cpuinfo` between the host and the guest and find that `flag: intel_pt` is missing from the guest while it exists in the host.
I am aware of the related thread from the qemu-devel list [PATCH v2 6/8] target/i386/intel-pt: Enable host pass through of Intel P<https://lists.nongnu.org/archive/html/qemu-devel/2022-08/msg01180.html> But after applying the patch I still can’t get it working. The flag and the device are still missing from within the guest. Can another give a pointer? Related infos are attached below: QEMU version: 7.1.0 CPU: Intel i9 12900k Host OS:ubuntu 22.04 Guest OS: mainline Linux kernel 5.10 Thanks! Regards, - Zion
