diff options
| author | Dong, Eddie <eddie.dong@intel.com> | 2008-01-07 13:20:25 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 11:53:14 +0300 |
| commit | 1ae0a13def678876b9acfb5ac1e2cf7d5d45a60d (patch) | |
| tree | 6127e3b33d325cf88053f38a9c9d5cea1be3b65d /arch/x86/kvm/mmu.c | |
| parent | 489f1d6526ab68ca1842398fa3ae95c597fe3d32 (diff) | |
KVM: MMU: Simplify hash table indexing
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 28f9a44060c..6f8392d4034 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -559,7 +559,7 @@ static void kvm_mmu_free_page(struct kvm *kvm, struct kvm_mmu_page *sp) static unsigned kvm_page_table_hashfn(gfn_t gfn) { - return gfn; + return gfn & ((1 << KVM_MMU_HASH_SHIFT) - 1); } static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, @@ -663,7 +663,7 @@ static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm *kvm, gfn_t gfn) struct hlist_node *node; pgprintk("%s: looking for gfn %lx\n", __FUNCTION__, gfn); - index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES; + index = kvm_page_table_hashfn(gfn); bucket = &kvm->arch.mmu_page_hash[index]; hlist_for_each_entry(sp, node, bucket, hash_link) if (sp->gfn == gfn && !sp->role.metaphysical) { @@ -701,7 +701,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, } pgprintk("%s: looking gfn %lx role %x\n", __FUNCTION__, gfn, role.word); - index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES; + index = kvm_page_table_hashfn(gfn); bucket = &vcpu->kvm->arch.mmu_page_hash[index]; hlist_for_each_entry(sp, node, bucket, hash_link) if (sp->gfn == gfn && sp->role.word == role.word) { @@ -840,7 +840,7 @@ static int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn) pgprintk("%s: looking for gfn %lx\n", __FUNCTION__, gfn); r = 0; - index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES; + index = kvm_page_table_hashfn(gfn); bucket = &kvm->arch.mmu_page_hash[index]; hlist_for_each_entry_safe(sp, node, n, bucket, hash_link) if (sp->gfn == gfn && !sp->role.metaphysical) { @@ -1450,7 +1450,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, vcpu->arch.last_pt_write_count = 1; vcpu->arch.last_pte_updated = NULL; } - index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES; + index = kvm_page_table_hashfn(gfn); bucket = &vcpu->kvm->arch.mmu_page_hash[index]; hlist_for_each_entry_safe(sp, node, n, bucket, hash_link) { if (sp->gfn != gfn || sp->role.metaphysical) |