KVM: Introduce gfn_to_index() which returns the index for a given level
This patch cleans up the code and removes the "(void)level;" warning
suppressor.
Note that we can also use this for PT_PAGE_TABLE_LEVEL to treat every
level uniformly later.
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index ae76cc3..37e7f10 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -688,8 +688,7 @@
{
unsigned long idx;
- idx = (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
- (slot->base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
+ idx = gfn_to_index(gfn, slot->base_gfn, level);
return &slot->lpage_info[level - 2][idx];
}