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Diffstat (limited to 'results/classifier/gemma3:12b/kvm/1902451')
| -rw-r--r-- | results/classifier/gemma3:12b/kvm/1902451 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/kvm/1902451 b/results/classifier/gemma3:12b/kvm/1902451 new file mode 100644 index 00000000..259811c7 --- /dev/null +++ b/results/classifier/gemma3:12b/kvm/1902451 @@ -0,0 +1,22 @@ + +incorrect cpuid feature detection + +Hello, + +I am currently developing a x64 kernel and I wanted to check through cpuid if some features are available in the guest. When I try to enable cpu features like vmcb_clean or constant_tsc qemu is saying that my host doesn't support the requested features. However cat /proc/cpuinfo tells a different story: + +model name: AMD Ryzen 5 3500U +flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb hw_pstate sme pti ssbd sev ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca + +I also checked it myself by running cpuid and check the bits as in the AMD Manual. Everything checks out but qemu still fails. + +QEMU version: QEMU emulator version 4.2.0 + +$ qemu-system-x86_64 -cpu host,+vmcb_clean,enforce -enable-kvm -drive format=raw,file=target/x86_64-os/debug/bootimage-my_kernel.bin -serial stdio -display none +qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.8000000AH:EDX.vmcb-clean [bit 5] +qemu-system-x86_64: Host doesn't support requested features + +or + +$ qemu-system-x86_64 -cpu host,+constant_tsc,enforce -enable-kvm -drive format=raw,file=target/x86_64-os/debug/bootimage-my_kernel.bin -serial stdio -display none +qemu-system-x86_64: Property '.constant_tsc' not found \ No newline at end of file |