diff --git a/src/hotspot/cpu/x86/vm_version_x86.cpp b/src/hotspot/cpu/x86/vm_version_x86.cpp
index 66134e6b0bc..0522d87dddb 100644
--- a/src/hotspot/cpu/x86/vm_version_x86.cpp
+++ b/src/hotspot/cpu/x86/vm_version_x86.cpp
@@ -141,7 +141,7 @@ class VM_Version_StubGenerator: public StubCodeGenerator {
     const uint32_t CPU_FAMILY_486 = (4 << CPU_FAMILY_SHIFT);
     bool use_evex = FLAG_IS_DEFAULT(UseAVX) || (UseAVX > 2);
 
-    Label detect_486, cpu486, detect_586, std_cpuid1, std_cpuid4, std_cpuidb, std_cpuid24, std_cpuid29;
+    Label detect_486, cpu486, detect_586, std_cpuid1, std_cpuid4, std_cpuid24, std_cpuid29;
     Label sef_cpuid, sefsl1_cpuid, ext_cpuid, ext_cpuid1, ext_cpuid5, ext_cpuid7;
     Label ext_cpuid8, done, wrapup, vector_save_restore, apx_save_restore_warning;
     Label legacy_setup, save_restore_except, legacy_save_restore, start_simd_check;
@@ -215,25 +215,11 @@ class VM_Version_StubGenerator: public StubCodeGenerator {
     __ movl(Address(rsi,12), rdx);
 
     __ cmpl(rax, 0xa);                  // Is cpuid(0xB) supported?
-    __ jcc(Assembler::belowEqual, std_cpuid4);
-
-    __ cmpl(rax, 0x19);                  // Is cpuid(0x1A) supported?
-    __ jccb(Assembler::belowEqual, std_cpuidb);
-
-    //
-    // cpuid(0x1A) Native Model ID
-    //
-    __ movl(rax, 0x1A);
-    __ xorl(rcx, rcx);   // must be 0
-    __ cpuid();
-
-    __ lea(rsi, Address(rbp, in_bytes(VM_Version::std_cpuid1a_offset())));
-    __ movl(Address(rsi, 0), rax);
+    __ jccb(Assembler::belowEqual, std_cpuid4);
 
     //
     // cpuid(0xB) Processor Topology
     //
-    __ bind(std_cpuidb);
     __ movl(rax, 0xb);
     __ xorl(rcx, rcx);   // Threads level
     __ cpuid();
@@ -935,7 +921,8 @@ void VM_Version::get_processor_features() {
 
   // Check if processor has Intel Ecore
   if (FLAG_IS_DEFAULT(EnableX86ECoreOpts) && is_intel() && is_intel_server_family() &&
-    (_cpuid_info.std_cpuid1a_eax.bits.core_type == 0x20 /* Atom (E-Core) */ || supports_hybrid())) {
+    (supports_hybrid() ||
+     _model == 0xAF /* Xeon 6 E-cores (Sierra Forest) */ )) {
     FLAG_SET_DEFAULT(EnableX86ECoreOpts, true);
   }
 
diff --git a/src/hotspot/cpu/x86/vm_version_x86.hpp b/src/hotspot/cpu/x86/vm_version_x86.hpp
index 18b1d13a279..cc93ee3564e 100644
--- a/src/hotspot/cpu/x86/vm_version_x86.hpp
+++ b/src/hotspot/cpu/x86/vm_version_x86.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -306,14 +306,6 @@ class VM_Version : public Abstract_VM_Version {
     } bits;
   };
 
-  union StdCpuid1AEax {
-    uint32_t value;
-    struct {
-      uint32_t core_native_model_id : 24,
-               core_type            : 8;
-    } bits;
-  };
-
   union StdCpuidEax29Ecx0 {
     uint32_t value;
     struct {
@@ -602,13 +594,6 @@ protected:
     SefCpuid7SubLeaf1Eax sefsl1_cpuid7_eax;
     SefCpuid7SubLeaf1Edx sefsl1_cpuid7_edx;
 
-    // cpuid function 1A (Native Model ID Enumeration)
-    // eax = 0x1A, ecx = 0
-    StdCpuid1AEax std_cpuid1a_eax;
-    uint32_t      std_cpuid1a_ebx; // unused currently
-    uint32_t      std_cpuid1a_ecx; // unused currently
-    uint32_t      std_cpuid1a_edx; // unused currently
-
     // cpuid function 24 converged vector ISA main leaf
     // eax = 24, ecx = 0
     StdCpuid24MainLeafEax std_cpuid24_eax;
@@ -737,7 +722,6 @@ public:
   // Offsets for cpuid asm stub
   static ByteSize std_cpuid0_offset() { return byte_offset_of(CpuidInfo, std_max_function); }
   static ByteSize std_cpuid1_offset() { return byte_offset_of(CpuidInfo, std_cpuid1_eax); }
-  static ByteSize std_cpuid1a_offset() { return byte_offset_of(CpuidInfo, std_cpuid1a_eax); }
   static ByteSize std_cpuid24_offset() { return byte_offset_of(CpuidInfo, std_cpuid24_eax); }
   static ByteSize std_cpuid29_offset() { return byte_offset_of(CpuidInfo, std_cpuid29_ebx); }
   static ByteSize dcp_cpuid4_offset() { return byte_offset_of(CpuidInfo, dcp_cpuid4_eax); }