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authorWei Yang <richard.weiyang@gmail.com>2018-09-27 08:31:26 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2019-03-28 17:27:19 +0100
commit4d66623cfba0949b2f0d669bd2ae732124c99ded (patch)
treec031dcad0bdd4e7e995696f18f09c9c88219f16b
parent711eff3a8fa1d6193139a895524240912011b4dc (diff)
downloadlinux-4d66623cfba0949b2f0d669bd2ae732124c99ded.tar.bz2
KVM: x86: remove check on nr_mmu_pages in kvm_arch_commit_memory_region()
* 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@gmail.com> Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--arch/x86/include/asm/kvm_host.h2
-rw-r--r--arch/x86/kvm/mmu.c2
-rw-r--r--arch/x86/kvm/x86.c8
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 5b03006c00be..679168931c40 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1254,7 +1254,7 @@ 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, u64 gen);
-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 f6d760dcdb75..5a9981465fbb 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -6028,7 +6028,7 @@ out:
/*
* 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 65e4559eef2f..491e92383da8 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9429,13 +9429,9 @@ 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