[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 2/3] x86/HVM: support (emulate) UMIP
On 08/12/16 12:20, Jan Beulich wrote: > >> However, it would also require only enabling the SVM GP intercept in the >> hvm_update_guest_vendor() path (which should be renamed to something >> slightly more generic like hvm_cpuid_policy_updated()). > Why that? We always need it intercepted as long as the guest > wants UMIP, but the hardware doesn't offer it. The feature isn't > tied to the vendor being Intel or some such. The hvm_update_guest_vendor() path is post-domain_create() way of signalling "cpuid has changed - you might want to reconfigure intercepts". It is currently used only to alter the #UD intercept based on the set CPUID vendor (hence its name), but the name now looks rather short sighted. With the proposal of having emulated-UMIP as explicitly opt-in, the required intercepts shouldn't be enabled at domain_create() time, and should be enabled later after the toolstack has set a policy. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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