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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>
This commit is contained in:
Paolo Bonzini 2013-10-02 16:56:16 +02:00
parent 4c1a50de92
commit fa4a2c080e
1 changed files with 14 additions and 28 deletions
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42
arch/x86/kvm/mmu.c
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@ -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);
}