Introduce kvm_mmu_slot_lpages() to calculcate lpage_info and rmap array size.
The other __kvm_mmu_slot_lpages() can take an extra parameter of npages rather
than fetching from the memslot pointer. Start to use the latter one in
kvm_alloc_memslot_metadata().
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
arch/x86/kvm/x86.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4aa3cc6ae5d4..d2acbea2f3b5 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -269,6 +269,20 @@ static struct kmem_cache *x86_fpu_cache;
static struct kmem_cache *x86_emulator_cache;
+static inline unsigned long
+__kvm_mmu_slot_lpages(struct kvm_memory_slot *slot, unsigned long npages,
+ int level)
+{
+ return gfn_to_index(slot->base_gfn + npages - 1,
+ slot->base_gfn, level) + 1;
+}
+
+static inline unsigned long
+kvm_mmu_slot_lpages(struct kvm_memory_slot *slot, int level)
+{
+ return __kvm_mmu_slot_lpages(slot, slot->npages, level);
+}
+
/*
* When called, it means the previous get/set msr reached an invalid msr.
* Return true if we want to ignore/silent this failed msr access.
@@ -10933,8 +10947,7 @@ static int kvm_alloc_memslot_metadata(struct kvm_memory_slot *slot,
int lpages;
int level = i + 1;
- lpages = gfn_to_index(slot->base_gfn + npages - 1,
- slot->base_gfn, level) + 1;
+ lpages = __kvm_mmu_slot_lpages(slot, npages, level);
slot->arch.rmap[i] =
kvcalloc(lpages, sizeof(*slot->arch.rmap[i]),
--
2.31.1
