1 files changed, 66 insertions, 0 deletions
diff --git a/results/classifier/016/KVM/55961334 b/results/classifier/016/KVM/55961334
new file mode 100644
index 000000000..ede09a180
--- /dev/null
+++ b/results/classifier/016/KVM/55961334
@@ -0,0 +1,66 @@
+KVM: 0.924
+x86: 0.885
+debug: 0.797
+virtual: 0.715
+operating system: 0.649
+hypervisor: 0.394
+TCG: 0.049
+register: 0.039
+network: 0.028
+kernel: 0.021
+PID: 0.016
+performance: 0.016
+user-level: 0.014
+files: 0.011
+architecture: 0.009
+socket: 0.007
+ppc: 0.004
+assembly: 0.004
+semantic: 0.003
+alpha: 0.003
+device: 0.003
+VMM: 0.003
+risc-v: 0.002
+vnc: 0.002
+boot: 0.001
+permissions: 0.001
+peripherals: 0.001
+graphic: 0.000
+arm: 0.000
+mistranslation: 0.000
+i386: 0.000
+
+[Bug] "-ht" flag ignored under KVM - guest still reports HT
+
+Hi Community,
+We have observed that the 'ht' feature bit cannot be disabled when QEMU runs
+with KVM acceleration.
+qemu-system-x86_64 \
+  --enable-kvm \
+  -machine q35 \
+  -cpu host,-ht \
+  -smp 4 \
+  -m 4G \
+  -drive file=rootfs.img,format=raw \
+  -nographic \
+  -append 'console=ttyS0 root=/dev/sda rw'
+Because '-ht' is specified, the guest should expose no HT capability
+(cpuid.1.edx[28] = 0), and /proc/cpuinfo shouldn't show HT feature, but we still
+saw ht in linux guest when run 'cat /proc/cpuinfo'.
+XiaoYao mentioned that:
+
+It has been the behavior of QEMU since
+
+  commit 400281af34e5ee6aa9f5496b53d8f82c6fef9319
+  Author: Andre Przywara <andre.przywara@amd.com>
+  Date:   Wed Aug 19 15:42:42 2009 +0200
+
+    set CPUID bits to present cores and threads topology
+
+that we cannot remove HT CPUID bit from guest via "-cpu xxx,-ht" if the
+VM has >= 2 vcpus.
+I'd like to know whether there's a plan to address this issue, or if the current
+behaviour is considered acceptable.
+Best regards,
+Ewan.
+