From 2f7d8e3d0d87f884bef097c0db7100699ee491fd Mon Sep 17 00:00:00 2001
From: sayantn <sayantn05@gmail.com>
Date: Wed, 17 Dec 2025 01:41:29 +0530
Subject: [PATCH] panic if cpuid is called with SGX

---
 crates/core_arch/src/x86/cpuid.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/crates/core_arch/src/x86/cpuid.rs b/crates/core_arch/src/x86/cpuid.rs
index 84dcf75492..b35699bd7a 100644
--- a/crates/core_arch/src/x86/cpuid.rs
+++ b/crates/core_arch/src/x86/cpuid.rs
@@ -59,6 +59,10 @@ pub struct CpuidResult {
 #[cfg_attr(test, assert_instr(cpuid))]
 #[stable(feature = "simd_x86", since = "1.27.0")]
 pub fn __cpuid_count(leaf: u32, sub_leaf: u32) -> CpuidResult {
+    if cfg!(target_env = "sgx") {
+        panic!("`__cpuid` cannot be used in SGX");
+    }
+
     let eax;
     let ebx;
     let ecx;