[Qemu-devel] [Bug 1318091] Re: Perfctr MSRs not available to Guest OS on AMD Phenom II
[Expired for QEMU because there has been no activity for 60 days.] ** Changed in: qemu Status: Incomplete => Expired -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1318091 Title: Perfctr MSRs not available to Guest OS on AMD Phenom II Status in QEMU: Expired Bug description: The AMD Phenom(tm) II X4 965 Processor (family 16, model 4, stepping 3) has the 4 architecturally supported perf counters at MSRs. The selectors are c001000-c001003, and the counters are c001004-c001007. I've verified that the MSRs are there and working by manually setting the MSRs with msr-tools to count cycles. The processor does not support the extended perfctr or the perfctr_nb. These are in cpuid leaf 8000_0001. Qemu also sees that these cpuid flags are not set, when I try launching with -cpu host,perfctr_core,check. However, this flag is only for the extended perfctr MSRs, which also happen to map the original four counters at c0010200. When I run a Guest OS, that OS is unable to use the perf counter registers from c001000-7. rdmsr and wrmsr complete, but the results are always 0. By contrast, a wrmsr to one of the c0010200 registers causes a general protection fault (as it should, since those aren't supported). Kernel: 3.14.0-gentoo Qemu: 2.0.0 (gentoo) and also with 2.0.50 (commit 06b4f00d5) Qemu command: qemu-system-x86_64 -enable-kvm -cpu host -smp 8 -m 1024 -nographic -monitor /dev/pts/4 mnt/hdd.img cat /proc/cpuinfo: processor : 3 vendor_id : AuthenticAMD cpu family: 16 model : 4 model name: AMD Phenom(tm) II X4 965 Processor stepping : 3 cpu MHz : 800.000 cache size: 512 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid: 3 initial apicid: 3 fpu : yes fpu_exception : yes cpuid level : 5 wp: yes 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 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save bogomips : 6803.79 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate thanks. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1318091/+subscriptions
[Qemu-devel] [Bug 1318091] Re: Perfctr MSRs not available to Guest OS on AMD Phenom II
Hi - I don't have the hardware readily available anymore, so I can't test it. Might as well close the bug. Regarding Oliver's question, it doesn't sound like the same issue I had. I do recall that processor and qemu not supporting rdtscp (which is fine), so that problem might be some qemu startup script requesting features that aren't available. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1318091 Title: Perfctr MSRs not available to Guest OS on AMD Phenom II Status in QEMU: Incomplete Bug description: The AMD Phenom(tm) II X4 965 Processor (family 16, model 4, stepping 3) has the 4 architecturally supported perf counters at MSRs. The selectors are c001000-c001003, and the counters are c001004-c001007. I've verified that the MSRs are there and working by manually setting the MSRs with msr-tools to count cycles. The processor does not support the extended perfctr or the perfctr_nb. These are in cpuid leaf 8000_0001. Qemu also sees that these cpuid flags are not set, when I try launching with -cpu host,perfctr_core,check. However, this flag is only for the extended perfctr MSRs, which also happen to map the original four counters at c0010200. When I run a Guest OS, that OS is unable to use the perf counter registers from c001000-7. rdmsr and wrmsr complete, but the results are always 0. By contrast, a wrmsr to one of the c0010200 registers causes a general protection fault (as it should, since those aren't supported). Kernel: 3.14.0-gentoo Qemu: 2.0.0 (gentoo) and also with 2.0.50 (commit 06b4f00d5) Qemu command: qemu-system-x86_64 -enable-kvm -cpu host -smp 8 -m 1024 -nographic -monitor /dev/pts/4 mnt/hdd.img cat /proc/cpuinfo: processor : 3 vendor_id : AuthenticAMD cpu family: 16 model : 4 model name: AMD Phenom(tm) II X4 965 Processor stepping : 3 cpu MHz : 800.000 cache size: 512 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid: 3 initial apicid: 3 fpu : yes fpu_exception : yes cpuid level : 5 wp: yes 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 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save bogomips : 6803.79 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate thanks. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1318091/+subscriptions
[Qemu-devel] [Bug 1318091] Re: Perfctr MSRs not available to Guest OS on AMD Phenom II
Triaging old bug tickets... can you still reproduce this issue with the latest version of QEMU? Or could we close this ticket nowadays? ** Changed in: qemu Status: New => Incomplete -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1318091 Title: Perfctr MSRs not available to Guest OS on AMD Phenom II Status in QEMU: Incomplete Bug description: The AMD Phenom(tm) II X4 965 Processor (family 16, model 4, stepping 3) has the 4 architecturally supported perf counters at MSRs. The selectors are c001000-c001003, and the counters are c001004-c001007. I've verified that the MSRs are there and working by manually setting the MSRs with msr-tools to count cycles. The processor does not support the extended perfctr or the perfctr_nb. These are in cpuid leaf 8000_0001. Qemu also sees that these cpuid flags are not set, when I try launching with -cpu host,perfctr_core,check. However, this flag is only for the extended perfctr MSRs, which also happen to map the original four counters at c0010200. When I run a Guest OS, that OS is unable to use the perf counter registers from c001000-7. rdmsr and wrmsr complete, but the results are always 0. By contrast, a wrmsr to one of the c0010200 registers causes a general protection fault (as it should, since those aren't supported). Kernel: 3.14.0-gentoo Qemu: 2.0.0 (gentoo) and also with 2.0.50 (commit 06b4f00d5) Qemu command: qemu-system-x86_64 -enable-kvm -cpu host -smp 8 -m 1024 -nographic -monitor /dev/pts/4 mnt/hdd.img cat /proc/cpuinfo: processor : 3 vendor_id : AuthenticAMD cpu family: 16 model : 4 model name: AMD Phenom(tm) II X4 965 Processor stepping : 3 cpu MHz : 800.000 cache size: 512 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid: 3 initial apicid: 3 fpu : yes fpu_exception : yes cpuid level : 5 wp: yes 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 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save bogomips : 6803.79 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate thanks. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1318091/+subscriptions
[Qemu-devel] [Bug 1318091] Re: Perfctr MSRs not available to Guest OS on AMD Phenom II
i don't understand this in detail, but since the last update of qemu i can't start my virtual win7 machine. i use gnome-boxes 3.24. qemu 2.8 works, 2.9 leads to this: Preformatted text(gnome-boxes:4301): Boxes-WARNING **: machine.vala:611: Failed to start win7: Unable to start domain: the CPU is incompatible with host CPU: Host CPU does not provide required features: monitor, rdtscp, svm i ask, because i also use an phenom 2 x4 and if this is the bug i don't need to opan a new one. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1318091 Title: Perfctr MSRs not available to Guest OS on AMD Phenom II Status in QEMU: New Bug description: The AMD Phenom(tm) II X4 965 Processor (family 16, model 4, stepping 3) has the 4 architecturally supported perf counters at MSRs. The selectors are c001000-c001003, and the counters are c001004-c001007. I've verified that the MSRs are there and working by manually setting the MSRs with msr-tools to count cycles. The processor does not support the extended perfctr or the perfctr_nb. These are in cpuid leaf 8000_0001. Qemu also sees that these cpuid flags are not set, when I try launching with -cpu host,perfctr_core,check. However, this flag is only for the extended perfctr MSRs, which also happen to map the original four counters at c0010200. When I run a Guest OS, that OS is unable to use the perf counter registers from c001000-7. rdmsr and wrmsr complete, but the results are always 0. By contrast, a wrmsr to one of the c0010200 registers causes a general protection fault (as it should, since those aren't supported). Kernel: 3.14.0-gentoo Qemu: 2.0.0 (gentoo) and also with 2.0.50 (commit 06b4f00d5) Qemu command: qemu-system-x86_64 -enable-kvm -cpu host -smp 8 -m 1024 -nographic -monitor /dev/pts/4 mnt/hdd.img cat /proc/cpuinfo: processor : 3 vendor_id : AuthenticAMD cpu family: 16 model : 4 model name: AMD Phenom(tm) II X4 965 Processor stepping : 3 cpu MHz : 800.000 cache size: 512 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid: 3 initial apicid: 3 fpu : yes fpu_exception : yes cpuid level : 5 wp: yes 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 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save bogomips : 6803.79 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate thanks. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1318091/+subscriptions
