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Paolo Bonzini authored
Emulator accesses are always done a page at a time, either by the emulator itself (for fetches) or because we need to query the MMU for address translations. Speed up these accesses by using kvm_read_guest_page and, in the case of fetches, by inlining kvm_read_guest_virt_helper and dropping the loop around kvm_read_guest_page. This final tweak saves 30-100 more clock cycles (4-10%), bringing the count (as measured by kvm-unit-tests) down to 720-1100 clock cycles on a Sandy Bridge Xeon host, compared to 2300-3200 before the whole series and 925-1700 after the first two low-hanging fruit changes. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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