KVM: Don't spam kernel log when injecting exceptions due to bad cr writes

(Cherry-picked from commit d6a23895aa82353788a1cc5a1d9a1c963465463e)

These are guest-triggerable.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 27 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e900908174fa..1b880f8720d2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -384,21 +384,16 @@ out:
 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 {
         if (cr0 & CR0_RESERVED_BITS) {
-                printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
-                       cr0, vcpu->arch.cr0);
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
 
         if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
-                printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
 
         if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
-                printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
-                       "and a clear PE flag\n");
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
@@ -409,15 +404,11 @@ void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
                         int cs_db, cs_l;
 
                         if (!is_pae(vcpu)) {
-                                printk(KERN_DEBUG "set_cr0: #GP, start paging "
-                                       "in long mode while PAE is disabled\n");
                                 kvm_inject_gp(vcpu, 0);
                                 return;
                         }
                         kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
                         if (cs_l) {
-                                printk(KERN_DEBUG "set_cr0: #GP, start paging "
-                                       "in long mode while CS.L == 1\n");
                                 kvm_inject_gp(vcpu, 0);
                                 return;
 
@@ -425,8 +416,6 @@ void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
                 } else
 #endif
                 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
-                        printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
-                               "reserved bits\n");
                         kvm_inject_gp(vcpu, 0);
                         return;
                 }
@@ -453,28 +442,23 @@ void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
         unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE;
 
         if (cr4 & CR4_RESERVED_BITS) {
-                printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
 
         if (is_long_mode(vcpu)) {
                 if (!(cr4 & X86_CR4_PAE)) {
-                        printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
-                               "in long mode\n");
                         kvm_inject_gp(vcpu, 0);
                         return;
                 }
         } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
                    && ((cr4 ^ old_cr4) & pdptr_bits)
                    && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
-                printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
 
         if (cr4 & X86_CR4_VMXE) {
-                printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
@@ -495,21 +479,16 @@ void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
 
         if (is_long_mode(vcpu)) {
                 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
-                        printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
                         kvm_inject_gp(vcpu, 0);
                         return;
                 }
         } else {
                 if (is_pae(vcpu)) {
                         if (cr3 & CR3_PAE_RESERVED_BITS) {
-                                printk(KERN_DEBUG
-                                       "set_cr3: #GP, reserved bits\n");
                                 kvm_inject_gp(vcpu, 0);
                                 return;
                         }
                         if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
-                                printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
-                                       "reserved bits\n");
                                 kvm_inject_gp(vcpu, 0);
                                 return;
                         }
@@ -541,7 +520,6 @@ EXPORT_SYMBOL_GPL(kvm_set_cr3);
 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
 {
         if (cr8 & CR8_RESERVED_BITS) {
-                printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
@@ -595,15 +573,12 @@ static u32 emulated_msrs[] = {
 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
 {
         if (efer & efer_reserved_bits) {
-                printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
-                       efer);
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
 
         if (is_paging(vcpu)
             && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) {
-                printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
                 kvm_inject_gp(vcpu, 0);
                 return;
         }
@@ -613,7 +588,6 @@ static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
 
                 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
                 if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) {
-                        printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n");
                         kvm_inject_gp(vcpu, 0);
                         return;
                 }
@@ -624,7 +598,6 @@ static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
 
                 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
                 if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) {
-                        printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n");
                         kvm_inject_gp(vcpu, 0);
                         return;
                 }