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From: | Gerhard Wiesinger |
Subject: | Re: [Qemu-devel] DOS VM problem with QEMU-KVM and newer kernels |
Date: | Mon, 16 Apr 2012 14:18:36 +0200 (CEST) |
User-agent: | Alpine 2.02 (LFD 1266 2009-07-14) |
On Mon, 16 Apr 2012, Avi Kivity wrote:
On 04/16/2012 01:30 PM, Roedel, Joerg wrote:On Mon, Apr 16, 2012 at 12:25:37PM +0200, Jan Kiszka wrote:On 2012-04-15 11:44, Avi Kivity wrote:Jan, Joerg, was an AMD erratum published for the bug?It wasn't an erratum but a documented feature limitation in the AMD architecture that was simply ignored by the old code.Right. But there is an erratum on K8 (only) which Kevin ran into. It is documented as Erratum 701 and the bug is that no EXITINTINFO is stored on a task-switch intercept on K8.Ah, so this could affect Gerhard. Gerhard, what's your cpu family/model/stepping from /proc/cpuinfo?
Only CPU 0 of 3: processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 4 model name : AMD Phenom(tm) II X4 940 Processor stepping : 2 microcode : 0x1000086 cpu MHz : 2999.912 cache size : 512 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 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 : 5999.82 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 part of cpuid, CPU 0: vendor_id = "AuthenticAMD" version information (1/eax): processor type = primary processor (0) family = Intel Pentium 4/Pentium D/Pentium Extreme Edition/Celeron/Xeon/Xeon MP/Itanium2, AMD Athlon 64/Athlon XP-M/Opteron/Sempron/Turion (15) model = 0x4 (4) stepping id = 0x2 (2) extended family = 0x1 (1) extended model = 0x0 (0) (simple synth) = AMD Quad-Core Opteron (Shanghai RB-C2) / Embedded Opteron (Shanghai RB-C2) / Athlon Dual-Core (Regor / Propus RB-C2) / Phenom II (Callisto / Heka / Deneb RB-C2), 45nm miscellaneous (1/ebx): process local APIC physical ID = 0x0 (0) cpu count = 0x4 (4) CLFLUSH line size = 0x8 (8) brand index = 0x0 (0) brand id = 0x00 (0): unknown Ciao, Gerhard -- http://www.wiesinger.com/
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