KVM: x86: mmu: replace assertions with MMU_WARN_ON, a conditional WARN_ON

This makes the direction of the conditions consistent with code that
is already using WARN_ON.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 14 insertions, 28 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index b31eff8fa43d..a0985ebb5512 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -63,30 +63,16 @@ enum {
 #undef MMU_DEBUG
 
 #ifdef MMU_DEBUG
+static bool dbg = 0;
+module_param(dbg, bool, 0644);
 
 #define pgprintk(x...) do { if (dbg) printk(x); } while (0)
 #define rmap_printk(x...) do { if (dbg) printk(x); } while (0)
-
+#define MMU_WARN_ON(x) WARN_ON(x)
 #else
-
 #define pgprintk(x...) do { } while (0)
 #define rmap_printk(x...) do { } while (0)
-
-#endif
-
-#ifdef MMU_DEBUG
-static bool dbg = 0;
-module_param(dbg, bool, 0644);
-#endif
-
-#ifndef MMU_DEBUG
-#define ASSERT(x) do { } while (0)
-#else
-#define ASSERT(x)                                                       \
-        if (!(x)) {                                                     \
-                printk(KERN_WARNING "assertion failed %s:%d: %s\n",     \
-                       __FILE__, __LINE__, #x);                         \
-        }
+#define MMU_WARN_ON(x) do { } while (0)
 #endif
 
 #define PTE_PREFETCH_NUM                8
@@ -1536,7 +1522,7 @@ static inline void kvm_mod_used_mmu_pages(struct kvm *kvm, int nr)
 
 static void kvm_mmu_free_page(struct kvm_mmu_page *sp)
 {
-        ASSERT(is_empty_shadow_page(sp->spt));
+        MMU_WARN_ON(!is_empty_shadow_page(sp->spt));
         hlist_del(&sp->hash_link);
         list_del(&sp->link);
         free_page((unsigned long)sp->spt);
@@ -3041,7 +3027,7 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
                 for (i = 0; i < 4; ++i) {
                         hpa_t root = vcpu->arch.mmu.pae_root[i];
 
-                        ASSERT(!VALID_PAGE(root));
+                        MMU_WARN_ON(VALID_PAGE(root));
                         spin_lock(&vcpu->kvm->mmu_lock);
                         make_mmu_pages_available(vcpu);
                         sp = kvm_mmu_get_page(vcpu, i << (30 - PAGE_SHIFT),
@@ -3079,7 +3065,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
         if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) {
                 hpa_t root = vcpu->arch.mmu.root_hpa;
 
-                ASSERT(!VALID_PAGE(root));
+                MMU_WARN_ON(VALID_PAGE(root));
 
                 spin_lock(&vcpu->kvm->mmu_lock);
                 make_mmu_pages_available(vcpu);
@@ -3104,7 +3090,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
         for (i = 0; i < 4; ++i) {
                 hpa_t root = vcpu->arch.mmu.pae_root[i];
 
-                ASSERT(!VALID_PAGE(root));
+                MMU_WARN_ON(VALID_PAGE(root));
                 if (vcpu->arch.mmu.root_level == PT32E_ROOT_LEVEL) {
                         pdptr = vcpu->arch.mmu.get_pdptr(vcpu, i);
                         if (!is_present_gpte(pdptr)) {
@@ -3329,7 +3315,7 @@ static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
         if (r)
                 return r;
 
-        ASSERT(VALID_PAGE(vcpu->arch.mmu.root_hpa));
+        MMU_WARN_ON(!VALID_PAGE(vcpu->arch.mmu.root_hpa));
 
         gfn = gva >> PAGE_SHIFT;
 
@@ -3395,7 +3381,7 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code,
         int write = error_code & PFERR_WRITE_MASK;
         bool map_writable;
 
-        ASSERT(VALID_PAGE(vcpu->arch.mmu.root_hpa));
+        MMU_WARN_ON(!VALID_PAGE(vcpu->arch.mmu.root_hpa));
 
         if (unlikely(error_code & PFERR_RSVD_MASK)) {
                 r = handle_mmio_page_fault(vcpu, gpa, error_code, true);
@@ -3716,7 +3702,7 @@ static void paging64_init_context_common(struct kvm_vcpu *vcpu,
         update_permission_bitmask(vcpu, context, false);
         update_last_pte_bitmap(vcpu, context);
 
-        ASSERT(is_pae(vcpu));
+        MMU_WARN_ON(!is_pae(vcpu));
         context->page_fault = paging64_page_fault;
         context->gva_to_gpa = paging64_gva_to_gpa;
         context->sync_page = paging64_sync_page;
@@ -3806,7 +3792,7 @@ void kvm_init_shadow_mmu(struct kvm_vcpu *vcpu)
         bool smep = kvm_read_cr4_bits(vcpu, X86_CR4_SMEP);
         struct kvm_mmu *context = &vcpu->arch.mmu;
 
-        ASSERT(!VALID_PAGE(context->root_hpa));
+        MMU_WARN_ON(VALID_PAGE(context->root_hpa));
 
         if (!is_paging(vcpu))
                 nonpaging_init_context(vcpu, context);
@@ -3829,7 +3815,7 @@ void kvm_init_shadow_ept_mmu(struct kvm_vcpu *vcpu, bool execonly)
 {
         struct kvm_mmu *context = &vcpu->arch.mmu;
 
-        ASSERT(!VALID_PAGE(context->root_hpa));
+        MMU_WARN_ON(VALID_PAGE(context->root_hpa));
 
         context->shadow_root_level = kvm_x86_ops->get_tdp_level();
 
@@ -4293,7 +4279,7 @@ int kvm_mmu_create(struct kvm_vcpu *vcpu)
 
 void kvm_mmu_setup(struct kvm_vcpu *vcpu)
 {
-        ASSERT(!VALID_PAGE(vcpu->arch.mmu.root_hpa));
+        MMU_WARN_ON(VALID_PAGE(vcpu->arch.mmu.root_hpa));
 
         init_kvm_mmu(vcpu);
 }