On 12/04/2018 19:57, Sean Christopherson wrote: > On Thu, Apr 12, 2018 at 04:38:39PM +0200, Paolo Bonzini wrote: >> On 21/02/2018 18:47, KarimAllah Ahmed wrote: >>> + >>> + if (kvm_vcpu_map(vcpu, >>> gpa_to_gfn(vmcs12->virtual_apic_page_addr), map)) >>> + vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, >>> gfn_to_gpa(map->pfn)); >> >> This should in principle be pfn_to_hpa. However, pfn_to_hpa is unused; >> let's just remove it and do "<< PAGE_SHIFT". Unlike gfn_to_gpa, where >> in principle the shift could be different, pfn_to_hpa is *by definition* >> a shift left by PAGE_SHIFT. > > Any reason not to use PFN_PHYS instead of the handcoded shift?
That works too of course. It's just not used much (or at all?) in KVM. Paolo
