* nr_mmu_pages would be non-zero only if kvm->arch.n_requested_mmu_pages is
non-zero.
* nr_mmu_pages is always non-zero, since kvm_mmu_calculate_mmu_pages()
never return zero.
Based on these two reasons, we can merge the two *if* clause and use the
return value from kvm_mmu_calculate_mmu_pages() directly. This simplify
the code and also eliminate the possibility for reader to believe
nr_mmu_pages would be zero.
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
v2: refactor changelog and rename kvm_mmu_calculate_mmu_pages() based on
Sean Christopherson comment.
---
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/mmu.c | 2 +-
arch/x86/kvm/x86.c | 8 ++------
3 files changed, 4 insertions(+), 8 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index c5e7bb811b1e..036dede47274 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1190,7 +1190,7 @@ void kvm_mmu_clear_dirty_pt_masked(struct kvm *kvm,
gfn_t gfn_offset, unsigned long mask);
void kvm_mmu_zap_all(struct kvm *kvm);
void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, struct kvm_memslots *slots);
-unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
+unsigned int kvm_mmu_calculate_default_mmu_pages(struct kvm *kvm);
void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 9fa77aa24fc7..80629f5377c3 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -5893,7 +5893,7 @@ int kvm_mmu_module_init(void)
/*
* Calculate mmu pages needed for kvm.
*/
-unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm)
+unsigned int kvm_mmu_calculate_default_mmu_pages(struct kvm *kvm)
{
unsigned int nr_mmu_pages;
unsigned int nr_pages = 0;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8614199d733b..bed566fd4ee5 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9131,13 +9131,9 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
const struct kvm_memory_slot *new,
enum kvm_mr_change change)
{
- int nr_mmu_pages = 0;
-
if (!kvm->arch.n_requested_mmu_pages)
- nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
-
- if (nr_mmu_pages)
- kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
+ kvm_mmu_change_mmu_pages(kvm,
+ kvm_mmu_calculate_default_mmu_pages(kvm));
/*
* Dirty logging tracks sptes in 4k granularity, meaning that large
--
2.15.1
