Re: [PATCH] KVM: Ignore LBR MSRs with no effect

On 2019/1/29 1:43, Anton Kuchin wrote: Win10 attempts to save these registers during KiSaveDebugRegisterState if LBR or BTF bits are set in MSR_IA32_DEBUGCTLMSR. It uses DR7 GE and LE flags for per-thread switching of these these features so zero value that is returned for MSR_IA32_DEBUGCTLMSR

[PATCH] KVM: Ignore LBR MSRs with no effect

Win10 attempts to save these registers during KiSaveDebugRegisterState if LBR or BTF bits are set in MSR_IA32_DEBUGCTLMSR. It uses DR7 GE and LE flags for per-thread switching of these these features so zero value that is returned for MSR_IA32_DEBUGCTLMSR has no effect. These registers are used