Bug 606262
| Summary: | 64bit RHEL6.0 Guest kernel has cpu flags "rep_good" unsupported by host | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Joy Pu <ypu> |
| Component: | kvm | Assignee: | john cooper <john.cooper> |
| Status: | CLOSED NOTABUG | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 5.6 | CC: | mkenneth, nobody, virt-maint, ykaul |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2010-08-31 15:05:22 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 580948 | ||
(In reply to comment #0) > Actual results: > Guest kernel has unsupported cpu flags by host > > Expected results: > There is no flags which is shown in guest but not in host The "rep_good" flag is a linux kernel defined pseudo flag and is not exported by kvm/qemu: arch/x86/include/asm/cpufeature.h: #define X86_FEATURE_MFENCE_RDTSC (3*32+17) /* "" Mfence synchronizes RDTSC */ arch/x86/kernel/cpu/feature_names.c: /* Other (Linux-defined) */ "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr", NULL, NULL, NULL, NULL, "constant_tsc", "up", NULL, "arch_perfmon", "pebs", "bts", NULL, NULL, "rep_good", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, This appears to be informational-only and is not a bug. Even if it is an issue in some scenario it falls outside of qemu/kvm. |
Description: In the RHEL5.6 host, RHEL6.0 guest will get unsupported cpu flag 'rep_good'. This only happend in 64 bit guest. Version-Release number of selected component (if applicable): host kernel:2.6.18-203.el5.x86_64 guest kernel: 2.6.32-36.el6.x86_64 rpm -qa |grep qemu kvm-qemu-img-83-183.el5 gpxe-roms-qemu-0.9.7-8.el5 How reproducible: Always Steps to Reproduce: 1. boot up a RHEL-6.0 guest 2. get the cpuinfo by cat both in guest and host #cat /proc/cpuinfo Actual results: Guest kernel has unsupported cpu flags by host Expected results: There is no flags which is shown in guest but not in host Additional info: 1. The command line: # /usr/local/staf/test/RHEV/kvm-new/autotest/client/tests/kvm/qemu -name vm1 -monitor tcp:0:6001,server,nowait -drive file=/usr/local/staf/test/RHEV/kvm-new/autotest/client/tests/kvm/images/RHEL-Server-6.0-64-virtio.qcow2,if=virtio,cache=none,boot=on -net nic,vlan=0,model=virtio,macaddr=02:70:05:8F:0a:5b -net tap,vlan=0,ifname=virtio_0_6001,script=/usr/local/staf/test/RHEV/kvm-new/autotest/client/tests/kvm/scripts/qemu-ifup-switch,downscript=no -m 1024 -smp 1 -soundhw ac97 -redir tcp:5000::22 -vnc :0 -spice port=8000,disable-ticketing -usbdevice tablet -rtc-td-hack -cpu qemu64,+sse2 -no-kvm-pit-reinjection -serial unix:/tmp/serial-20100621-170631-Esp3,server,nowait -no-hpet 2.Host cpuinfo processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU W3520 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 0 siblings : 8 core id : 3 cpu cores : 4 apicid : 7 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr sse4_1 sse4_2 popcnt lahf_lm bogomips : 5319.91 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: [8] 3. Guest cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 6 model name : QEMU Virtual CPU version 0.9.1 stepping : 3 cpu MHz : 2660.078 cache size : 32 KB fpu : yes fpu_exception : yes cpuid level : 4 wp : yes flags : fpu de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 syscall nx lm up rep_good unfair_spinlock pni hypervisor bogomips : 5320.15 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: 4. x86info of host and guest Host: x86info v1.20. Dave Jones 2001-2006 Feedback to <davej>. Found 8 CPUs MP Table: # APIC ID Version State Family Model Step Flags # 0 0x15 BSP, usable 6 10 5 0xbfebfbff # 2 0x15 AP, usable 6 10 5 0xbfebfbff # 4 0x15 AP, usable 6 10 5 0xbfebfbff # 6 0x15 AP, usable 6 10 5 0xbfebfbff -------------------------------------------------------------------------- CPU #1 eax in: 0x00000000, eax = 0000000b ebx = 756e6547 ecx = 6c65746e edx = 49656e69 eax in: 0x00000001, eax = 000106a5 ebx = 00100800 ecx = 009ce3bd edx = bfebfbff eax in: 0x00000002, eax = 55035a01 ebx = 00f0b2e4 ecx = 00000000 edx = 09ca212c eax in: 0x00000003, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x00000004, eax = 1c004121 ebx = 01c0003f ecx = 0000003f edx = 00000000 eax in: 0x00000005, eax = 00000040 ebx = 00000040 ecx = 00000003 edx = 00001120 eax in: 0x00000006, eax = 00000003 ebx = 00000002 ecx = 00000001 edx = 00000000 eax in: 0x00000007, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x00000008, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x00000009, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x0000000a, eax = 07300403 ebx = 00000044 ecx = 00000000 edx = 00000603 eax in: 0x0000000b, eax = 00000001 ebx = 00000002 ecx = 00000100 edx = 00000000 eax in: 0x80000000, eax = 80000008 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x80000001, eax = 00000000 ebx = 00000000 ecx = 00000001 edx = 28100800 eax in: 0x80000002, eax = 65746e49 ebx = 2952286c ecx = 6f655820 edx = 2952286e eax in: 0x80000003, eax = 55504320 ebx = 20202020 ecx = 20202020 edx = 57202020 eax in: 0x80000004, eax = 30323533 ebx = 20402020 ecx = 37362e32 edx = 007a4847 eax in: 0x80000005, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x80000006, eax = 00000000 ebx = 00000000 ecx = 01006040 edx = 00000000 eax in: 0x80000007, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000100 eax in: 0x80000008, eax = 00003024 ebx = 00000000 ecx = 00000000 edx = 00000000 Family: 6 Model: 10 Stepping: 5 Type: 0 Brand: 0 CPU Model: Pentium II (Deschutes) Original OEM Feature flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflsh ds acpi mmx fxsr sse sse2 ss ht tm pbe sse3 monitor ds-cpl vmx est tm2 ssse3 cx16 xTPR dca Extended feature flags: SYSCALL xd em64t lahf_lm Cache info L1 Data cache: 32KB, 8-way associative. 64 byte line size. TLB info Data TLB: 4KB pages, 4-way associative, 64 entries 64 byte prefetching. Found unknown cache descriptors: 09 21 55 5a b2 ca e4 Processor serial: 0001-06A5-0000-0000-0000-0000 Number of reporting banks : 9 Erk, MCG_CTL not present! :0000000000001c09: Bank: 0 (0x400) MC0CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000111 11111111 MC0STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00001111 11111111 MC0ADDR: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Bank: 1 (0x404) MC1CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 MC1STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00001111 11111111 MC1ADDR: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Bank: 2 (0x408) MC2CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00001111 MC2STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 MC2ADDR: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Bank: 3 (0x40c) MC3CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000011 MC3STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 MC3ADDR: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Bank: 4 (0x410) MC4CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000011 MC4STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 MC4ADDR: Couldn't read MSR 0x412 Bank: 5 (0x414) MC5CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00001111 MC5STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 MC5ADDR: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Bank: 6 (0x418) MC6CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000001 11111111 MC6STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 MC6ADDR: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Bank: 7 (0x41c) MC7CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000111 MC7STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 MC7ADDR: Couldn't read MSR 0x41e Bank: 8 (0x420) MC8CTL: 00000000 00000000 00000000 00000000 00000000 00000000 00000111 11111111 MC8STATUS: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 MC8ADDR: 00000000 00000000 00000000 00000011 11111111 11111111 11111111 11111111 The physical package supports 16 logical processors Microcode version: 0x0000000000000011 Connector type: Slot 1 (242 Contact Cartridge) MTRR registers: MTRRcap (0xfe): 0x0000000000000d08 MTRRphysBase0 (0x200): 0x00000000c0000000 MTRRphysMask0 (0x201): 0x0000000fc0000800 MTRRphysBase1 (0x202): 0x0000000000000006 MTRRphysMask1 (0x203): 0x0000000e00000800 MTRRphysBase2 (0x204): 0x0000000200000006 MTRRphysMask2 (0x205): 0x0000000f00000800 MTRRphysBase3 (0x206): 0x0000000300000006 MTRRphysMask3 (0x207): 0x0000000fc0000800 MTRRphysBase4 (0x208): 0x00000000bf800000 MTRRphysMask4 (0x209): 0x0000000fff800800 MTRRphysBase5 (0x20a): 0x0000000000000000 MTRRphysMask5 (0x20b): 0x0000000000000000 MTRRphysBase6 (0x20c): 0x0000000000000000 MTRRphysMask6 (0x20d): 0x0000000000000000 MTRRphysBase7 (0x20e): 0x0000000000000000 MTRRphysMask7 (0x20f): 0x0000000000000000 MTRRfix64K_00000 (0x250): 0x0606060606060606 MTRRfix16K_80000 (0x258): 0x0606060606060606 MTRRfix16K_A0000 (0x259): 0x0000000000000000 MTRRfix4K_C8000 (0x269): 0x0505050505050505 MTRRfix4K_D0000 0x26a: 0x0000000000000000 MTRRfix4K_D8000 0x26b: 0x0000000000000000 MTRRfix4K_E0000 0x26c: 0x0505050505050505 MTRRfix4K_E8000 0x26d: 0x0505050505050505 MTRRfix4K_F0000 0x26e: 0x0505050505050505 MTRRfix4K_F8000 0x26f: 0x0505050505050505 MTRRdefType (0x2ff): 0x0000000000000c00 2.65GHz processor (estimate). Guest: x86info v1.25. Dave Jones 2001-2009 Feedback to <davej>. Found 1 CPU, but found 16d CPUs in MPTable. MP Table: # APIC ID Version State Family Model Step Flags # 0 0x11 BSP, usable 6 0 0 0x0201 # 1 0x11 AP, unusable 6 0 0 0x0201 # 2 0x11 AP, unusable 6 0 0 0x0201 # 3 0x11 AP, unusable 6 0 0 0x0201 # 4 0x11 AP, unusable 6 0 0 0x0201 # 5 0x11 AP, unusable 6 0 0 0x0201 # 6 0x11 AP, unusable 6 0 0 0x0201 # 7 0x11 AP, unusable 6 0 0 0x0201 # 8 0x11 AP, unusable 6 0 0 0x0201 # 9 0x11 AP, unusable 6 0 0 0x0201 # 10 0x11 AP, unusable 6 0 0 0x0201 # 11 0x11 AP, unusable 6 0 0 0x0201 # 12 0x11 AP, unusable 6 0 0 0x0201 # 13 0x11 AP, unusable 6 0 0 0x0201 # 14 0x11 AP, unusable 6 0 0 0x0201 # 15 0x11 AP, unusable 6 0 0 0x0201 -------------------------------------------------------------------------- EFamily: 0 EModel: 0 Family: 6 Model: 6 Stepping: 3 CPU Model: Celeron / Mobile Pentium II Type: 0 (Original OEM) Brand: 0 (Unsupported) Number of reporting banks : 0 Erk, MCG_CTL not present! :0000000000000000: Number of cores per physical package=1 Number of logical processors per socket=1 Number of logical processors per core=1 APIC ID: 0x0 Package: 0 Core: 0 SMT ID 0 eax in: 0x00000000, eax = 00000004 ebx = 756e6547 ecx = 6c65746e edx = 49656e69 eax in: 0x00000001, eax = 00000663 ebx = 00000800 ecx = 80000001 edx = 078bfbfd eax in: 0x00000002, eax = 00000001 ebx = 00000000 ecx = 00000000 edx = 002c307d eax in: 0x00000003, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x00000004, eax = 00000121 ebx = 01c0003f ecx = 0000003f edx = 00000001 eax in: 0x80000000, eax = 8000000a ebx = 68747541 ecx = 444d4163 edx = 69746e65 eax in: 0x80000001, eax = 078bfbfd ebx = 00000000 ecx = 00000000 edx = 2191abfd eax in: 0x80000002, eax = 554d4551 ebx = 72695620 ecx = 6c617574 edx = 55504320 eax in: 0x80000003, eax = 72657620 ebx = 6e6f6973 ecx = 392e3020 edx = 0000312e eax in: 0x80000004, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x80000005, eax = 01ff01ff ebx = 01ff01ff ecx = 40020140 edx = 40020140 eax in: 0x80000006, eax = 00000000 ebx = 42004200 ecx = 02008140 edx = 00000000 eax in: 0x80000007, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x80000008, eax = 00003028 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x80000009, eax = 00000000 ebx = 00000000 ecx = 00000000 edx = 00000000 eax in: 0x8000000a, eax = 00000001 ebx = 00000010 ecx = 00000000 edx = 00000000 Cache info L1 Instruction cache: 32KB, 8-way associative. 64 byte line size. L1 Data cache: 32KB, 8-way associative. 64 byte line size. L2 cache: 2MB, 8-way associative. 64 byte line size. TLB info Feature flags: fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflsh mmx fxsr sse sse2 Extended feature flags: sse3 [31] [0] [2] [3] [4] [5] [6] [7] [8] [9] SYSCALL [13] [15] [16] xd [23] [24] em64t Connector type: Socket 370 (370 Pin PGA) MTRR registers: MTRRcap (0xfe): 0x0000000000000508 MTRRphysBase0 (0x200): 0x00000000c0000000 MTRRphysMask0 (0x201): 0xffffffffe0000800 MTRRphysBase1 (0x202): 0x0000000000000000 MTRRphysMask1 (0x203): 0x0000000000000000 MTRRphysBase2 (0x204): 0x0000000000000000 MTRRphysMask2 (0x205): 0x0000000000000000 MTRRphysBase3 (0x206): 0x0000000000000000 MTRRphysMask3 (0x207): 0x0000000000000000 MTRRphysBase4 (0x208): 0x0000000000000000 MTRRphysMask4 (0x209): 0x0000000000000000 MTRRphysBase5 (0x20a): 0x0000000000000000 MTRRphysMask5 (0x20b): 0x0000000000000000 MTRRphysBase6 (0x20c): 0x0000000000000000 MTRRphysMask6 (0x20d): 0x0000000000000000 MTRRphysBase7 (0x20e): 0x0000000000000000 MTRRphysMask7 (0x20f): 0x0000000000000000 MTRRfix64K_00000 (0x250): 0x0606060606060606 MTRRfix16K_80000 (0x258): 0x0606060606060606 MTRRfix16K_A0000 (0x259): 0x0000000000000000 MTRRfix4K_C8000 (0x269): 0x0000000000000000 MTRRfix4K_D0000 0x26a: 0x0000000000000000 MTRRfix4K_D8000 0x26b: 0x0000000000000000 MTRRfix4K_E0000 0x26c: 0x0000000000000000 MTRRfix4K_E8000 0x26d: 0x0000000000000000 MTRRfix4K_F0000 0x26e: 0x0000000000000000 MTRRfix4K_F8000 0x26f: 0x0000000000000000 MTRRdefType (0x2ff): 0x0000000000000c06 2.65GHz processor (estimate).