KVM: x86/mmu: Avoid retpoline on ->page_fault() with TDP
Wrap calls to ->page_fault() with a small shim to directly invoke the TDP fault handler when the kernel is using retpolines and TDP is being used. Single out the TDP fault handler and annotate the TDP path as likely to coerce the compiler into preferring it over the indirect function call. Rename tdp_page_fault() to kvm_tdp_page_fault(), as it's exposed outside of mmu.c to allow inlining the shim. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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