Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: <x86@xxxxxxxxxx> Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Cc: <linux-input@xxxxxxxxxxxxxxx> VMware has started using "vmcall" / "vmmcall" instead of an inl instruction for the "backdoor" interface. This series detects support for those instructions. Outside of the platform code we use the "ALTERNATIVES" self-patching mechanism similarly to how this is done with KVM. Unfortunately we need two x86 cpu feature flags for this, since we need the default instruction to be "inl". IIRC the vmmouse driver is used by other virtualization solutions than VMware, and those might break if they encounter any of the other instructions.
