KVM: Take kvm instead of vcpu to mmu_notifier_retry

The mmu_notifier_retry is not specific to any vcpu (and never will be)
so only take struct kvm as a parameter.

The motivation is the ARM mmu code that needs to call this from
somewhere where we long let go of the vcpu pointer.

Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

5 files changed, 8 insertions, 8 deletions

diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 7a4aae99ac5..2a89a36e726 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -710,7 +710,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
 
         /* Check if we might have been invalidated; let the guest retry if so */
         ret = RESUME_GUEST;
-        if (mmu_notifier_retry(vcpu, mmu_seq)) {
+        if (mmu_notifier_retry(vcpu->kvm, mmu_seq)) {
                 unlock_rmap(rmap);
                 goto out_unlock;
         }
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index 9955216477a..5e06e315388 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -297,7 +297,7 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
                 lock_rmap(rmap);
                 /* Check for pending invalidations under the rmap chain lock */
                 if (kvm->arch.using_mmu_notifiers &&
-                    mmu_notifier_retry(vcpu, mmu_seq)) {
+                    mmu_notifier_retry(vcpu->kvm, mmu_seq)) {
                         /* inval in progress, write a non-present HPTE */
                         pteh |= HPTE_V_ABSENT;
                         pteh &= ~HPTE_V_VALID;
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 3d5ca793938..6f78fa3a470 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2886,7 +2886,7 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, u32 error_code,
                 return r;
 
         spin_lock(&vcpu->kvm->mmu_lock);
-        if (mmu_notifier_retry(vcpu, mmu_seq))
+        if (mmu_notifier_retry(vcpu->kvm, mmu_seq))
                 goto out_unlock;
         kvm_mmu_free_some_pages(vcpu);
         if (likely(!force_pt_level))
@@ -3355,7 +3355,7 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code,
                 return r;
 
         spin_lock(&vcpu->kvm->mmu_lock);
-        if (mmu_notifier_retry(vcpu, mmu_seq))
+        if (mmu_notifier_retry(vcpu->kvm, mmu_seq))
                 goto out_unlock;
         kvm_mmu_free_some_pages(vcpu);
         if (likely(!force_pt_level))
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index f887e4cfc1f..d17decaf1db 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -565,7 +565,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
                 return r;
 
         spin_lock(&vcpu->kvm->mmu_lock);
-        if (mmu_notifier_retry(vcpu, mmu_seq))
+        if (mmu_notifier_retry(vcpu->kvm, mmu_seq))
                 goto out_unlock;
 
         kvm_mmu_audit(vcpu, AUDIT_PRE_PAGE_FAULT);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 6afc5be2615..82e2c783a21 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -841,9 +841,9 @@ extern struct kvm_stats_debugfs_item debugfs_entries[];
 extern struct dentry *kvm_debugfs_dir;
 
 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
-static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
+static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
 {
-        if (unlikely(vcpu->kvm->mmu_notifier_count))
+        if (unlikely(kvm->mmu_notifier_count))
                 return 1;
         /*
          * Ensure the read of mmu_notifier_count happens before the read
@@ -856,7 +856,7 @@ static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_se
          * can't rely on kvm->mmu_lock to keep things ordered.
          */
         smp_rmb();
-        if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
+        if (kvm->mmu_notifier_seq != mmu_seq)
                 return 1;
         return 0;
 }