1 files changed, 12 insertions, 19 deletions

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 44dcad43989d..5b8986fe3371 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1256,25 +1256,6 @@ asmlinkage void __init xen_start_kernel(void)
 #endif
 }
 
-static uint32_t xen_cpuid_base(void)
-{
-        uint32_t base, eax, ebx, ecx, edx;
-        char signature[13];
-
-        for (base = 0x40000000; base < 0x40010000; base += 0x100) {
-                cpuid(base, &eax, &ebx, &ecx, &edx);
-                *(uint32_t *)(signature + 0) = ebx;
-                *(uint32_t *)(signature + 4) = ecx;
-                *(uint32_t *)(signature + 8) = edx;
-                signature[12] = 0;
-
-                if (!strcmp("XenVMMXenVMM", signature) && ((eax - base) >= 2))
-                        return base;
-        }
-
-        return 0;
-}
-
 static int init_hvm_pv_info(int *major, int *minor)
 {
         uint32_t eax, ebx, ecx, edx, pages, msr, base;
@@ -1384,6 +1365,18 @@ static bool __init xen_hvm_platform(void)
         return true;
 }
 
+bool xen_hvm_need_lapic(void)
+{
+        if (xen_pv_domain())
+                return false;
+        if (!xen_hvm_domain())
+                return false;
+        if (xen_feature(XENFEAT_hvm_pirqs) && xen_have_vector_callback)
+                return false;
+        return true;
+}
+EXPORT_SYMBOL_GPL(xen_hvm_need_lapic);
+
 const __refconst struct hypervisor_x86 x86_hyper_xen_hvm = {
         .name                   = "Xen HVM",
         .detect                 = xen_hvm_platform,