Messages in this thread | | | Date | Fri, 19 Aug 2022 16:38:57 +0200 | From | Peter Zijlstra <> | Subject | Re: [RESEND PATCH] perf/x86/intel: Fix unchecked MSR access error for Alder Lake N |
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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.
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