KVM: x86: Check non-canonical addresses upon WRMSR

[pandora-kernel.git] / arch / x86 / include / asm / kvm_host.h

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index e350e68..15d24cb 100644 (file)
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -418,7 +418,7 @@ struct kvm_vcpu_arch {
        bool nmi_injected;    /* Trying to inject an NMI this entry */
 
        struct mtrr_state_type mtrr_state;
-       u32 pat;
+       u64 pat;
 
        int switch_db_regs;
        unsigned long db[KVM_NR_DB_REGS];
@@ -821,6 +821,20 @@ static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
        kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 }
 
+static inline u64 get_canonical(u64 la)
+{
+       return ((int64_t)la << 16) >> 16;
+}
+
+static inline bool is_noncanonical_address(u64 la)
+{
+#ifdef CONFIG_X86_64
+       return get_canonical(la) != la;
+#else
+       return false;
+#endif
+}
+
 #define TSS_IOPB_BASE_OFFSET 0x66
 #define TSS_BASE_SIZE 0x68
 #define TSS_IOPB_SIZE (65536 / 8)