From: Jon Doron <arilou@xxxxxxxxx> Sent: Thursday, March 12, 2020 12:12 PM > > On 12/03/2020, Michael Kelley wrote: > >From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> Sent: Thursday, March 12, 2020 6:51 AM > >> > >> Michael Kelley <mikelley@xxxxxxxxxxxxx> writes: > >> > >> > I'm flexible, and trying to not be a pain-in-the-neck. :-) What would > >> > the KVM guys think about putting the definitions in a KVM specific > >> > #include file, and clearly marking them as deprecated, mostly > >> > undocumented, and used only to support debugging old Windows > >> > versions? > >> > >> I *think* we should do the following: defines which *are* present in > >> TLFS doc (e.g. HV_FEATURE_DEBUG_MSRS_AVAILABLE, > >> HV_STATUS_OPERATION_DENIED, ...) go to asm/hyperv-tlfs.h, the rest > >> (syndbg) stuff goes to kvm-specific include (I'd suggest we just use > >> hyperv.h we already have). > >> > >> What do you think? > >> > > > >I could live with this proposal, since they *are* in the TLFS v6.0 as it > >exists today. However, v6.0 seems inconsistent in what parts of this > >debugging functionality it exposes, probably just because someone > >hasn't thought comprehensively about the topic across the whole > >document. I'll make sure that it gets looked at in the next revision > >(which should be a lot sooner that the 2+ years it took to get the v6.0 > >revision done). But I won't be surprised if the remaining vestiges are > >removed at that time, in which case we would want to move the > >definitions from hyperv-tlfs.h to KVM's hyper.h. > > > >Michael > > Hi guys, just a quick note I went over the old HyperV TLFS and it seems > like all the Syndbg MSRs are documented (under Appendix F: Hypervisor > Synthetic MSRs, from v5.0b). > > It seems like the undocumented stuff is HV_X64_MSR_SYNDBG_OPTIONS which > seems kinda odd because that's how you enable the hypercalls debugging > interface which is documented. > > And the syndbg CPUID leafs are not documented as well. > > So would you like me to put all the MSRs in the tlfs omitting the > HV_X64_MSR_SYNDBG_OPTIONS. > > So in hyperv.h we will have HV_X64_MSR_SYNDBG_OPTIONS and the CPUID > leafs. > Could you make the decision based on the new v6.0 of the Hyper-V TLFS? See https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs to get a copy. I think some of the synthetic debugger stuff has been dropped from the v6.0 version compared with the earlier v5.0 versions, and I'd like the updates to hyperv-tlfs.h to reflect that newest version. Michael
