Messages in this thread | | | Date | Mon, 22 Aug 2022 09:28:31 -0400 | Subject | Re: [RESEND PATCH] perf/x86/intel: Fix unchecked MSR access error for Alder Lake N | From | "Liang, Kan" <> |
| |
On 2022-08-19 10:38 a.m., Peter Zijlstra wrote: > On Thu, Aug 18, 2022 at 11:15:30AM -0700, kan.liang@linux.intel.com wrote: >> From: Kan Liang <kan.liang@linux.intel.com> >> >> For some Alder Lake N machine, the below unchecked MSR access error may be >> triggered. >> >> [ 0.088017] rcu: Hierarchical SRCU implementation. >> [ 0.088017] unchecked MSR access error: WRMSR to 0x38f (tried to write >> 0x0001000f0000003f) at rIP: 0xffffffffb5684de8 (native_write_msr+0x8/0x30) >> [ 0.088017] Call Trace: >> [ 0.088017] <TASK> >> [ 0.088017] __intel_pmu_enable_all.constprop.46+0x4a/0xa0 > > FWIW, I seem to get the same error when booting KVM on my ADL. I'm > fairly sure the whole CPUID vs vCPU thing is a trainwreck.
We will enhance the CPUID to address the issues. Hopefully, we can have them supported in the next generation.
Thanks, Kan
| |