KVM: MMU: Clean up MMU functions to take struct kvm when appropriate

Some of the MMU functions take a struct kvm_vcpu even though they affect all
VCPUs.  This patch cleans up some of them to instead take a struct kvm.  This
makes things a bit more clear.

The main thing that was confusing me was whether certain functions need to be
called on all VCPUs.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index ece0aa4..a5ca945 100644 (file)
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -606,7 +606,7 @@ static void mmu_page_remove_parent_pte(struct kvm_mmu_page *page,
        BUG();
 }
 
-static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm_vcpu *vcpu,
+static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm *kvm,
                                                gfn_t gfn)
 {
        unsigned index;
@@ -616,7 +616,7 @@ static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm_vcpu *vcpu,
 
        pgprintk("%s: looking for gfn %lx\n", __FUNCTION__, gfn);
        index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES;
-       bucket = &vcpu->kvm->mmu_page_hash[index];
+       bucket = &kvm->mmu_page_hash[index];
        hlist_for_each_entry(page, node, bucket, hash_link)
                if (page->gfn == gfn && !page->role.metaphysical) {
                        pgprintk("%s: found role %x\n",
@@ -782,7 +782,7 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages)
        kvm->n_alloc_mmu_pages = kvm_nr_mmu_pages;
 }
 
-static int kvm_mmu_unprotect_page(struct kvm_vcpu *vcpu, gfn_t gfn)
+static int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn)
 {
        unsigned index;
        struct hlist_head *bucket;
@@ -793,25 +793,25 @@ static int kvm_mmu_unprotect_page(struct kvm_vcpu *vcpu, gfn_t gfn)
        pgprintk("%s: looking for gfn %lx\n", __FUNCTION__, gfn);
        r = 0;
        index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES;
-       bucket = &vcpu->kvm->mmu_page_hash[index];
+       bucket = &kvm->mmu_page_hash[index];
        hlist_for_each_entry_safe(page, node, n, bucket, hash_link)
                if (page->gfn == gfn && !page->role.metaphysical) {
                        pgprintk("%s: gfn %lx role %x\n", __FUNCTION__, gfn,
                                 page->role.word);
-                       kvm_mmu_zap_page(vcpu->kvm, page);
+                       kvm_mmu_zap_page(kvm, page);
                        r = 1;
                }
        return r;
 }
 
-static void mmu_unshadow(struct kvm_vcpu *vcpu, gfn_t gfn)
+static void mmu_unshadow(struct kvm *kvm, gfn_t gfn)
 {
        struct kvm_mmu_page *page;
 
-       while ((page = kvm_mmu_lookup_page(vcpu, gfn)) != NULL) {
+       while ((page = kvm_mmu_lookup_page(kvm, gfn)) != NULL) {
                pgprintk("%s: zap %lx %x\n",
                         __FUNCTION__, gfn, page->role.word);
-               kvm_mmu_zap_page(vcpu->kvm, page);
+               kvm_mmu_zap_page(kvm, page);
        }
 }
 
@@ -1299,7 +1299,7 @@ int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva)
 {
        gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, gva);
 
-       return kvm_mmu_unprotect_page(vcpu, gpa >> PAGE_SHIFT);
+       return kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT);
 }
 
 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)

diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index 447d2c3..4f6edf8 100644 (file)
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -268,11 +268,11 @@ static void FNAME(set_pte_common)(struct kvm_vcpu *vcpu,
 
                spte |= PT_WRITABLE_MASK;
                if (user_fault) {
-                       mmu_unshadow(vcpu, gfn);
+                       mmu_unshadow(vcpu->kvm, gfn);
                        goto unshadowed;
                }
 
-               shadow = kvm_mmu_lookup_page(vcpu, gfn);
+               shadow = kvm_mmu_lookup_page(vcpu->kvm, gfn);
                if (shadow) {
                        pgprintk("%s: found shadow page for %lx, marking ro\n",
                                 __FUNCTION__, gfn);