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KVM: x86/mmu: Use KVM_PAGES_PER_HPAGE() instead of an open coded equivalent

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Use KVM_PAGES_PER_HPAGE() instead of open coding equivalent logic that is
anything but obvious.

No functional change intended, and verified by compiling with the below
assertions:

        BUILD_BUG_ON((1UL << KVM_HPAGE_GFN_SHIFT(PG_LEVEL_4K)) !=
                      KVM_PAGES_PER_HPAGE(PG_LEVEL_4K));

        BUILD_BUG_ON((1UL << KVM_HPAGE_GFN_SHIFT(PG_LEVEL_2M)) !=
                      KVM_PAGES_PER_HPAGE(PG_LEVEL_2M));

        BUILD_BUG_ON((1UL << KVM_HPAGE_GFN_SHIFT(PG_LEVEL_1G)) !=
                      KVM_PAGES_PER_HPAGE(PG_LEVEL_1G));

Link: https://lore.kernel.org/r/20240809194335.1726916-19-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-08-09 12:43:30 -07:00
parent 7645829145
commit 9a5bff7f5e
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/mmu/mmu.c
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@ -1464,7 +1464,7 @@ static bool slot_rmap_walk_okay(struct slot_rmap_walk_iterator *iterator)
static void slot_rmap_walk_next(struct slot_rmap_walk_iterator *iterator)
{
while (++iterator->rmap <= iterator->end_rmap) {
iterator->gfn += (1UL << KVM_HPAGE_GFN_SHIFT(iterator->level));
iterator->gfn += KVM_PAGES_PER_HPAGE(iterator->level);
if (iterator->rmap->val)
return;