From c9c2471796495453b0d75cfb3abaa05624d50a2a Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Sat, 27 Dec 2025 17:23:21 -0300
Subject: [PATCH] x86_64/context: fix check for xsave

---
 kernel-src/arch/x86-64/context.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel-src/arch/x86-64/context.c b/kernel-src/arch/x86-64/context.c
index 42f175d9..98fe0167 100644
--- a/kernel-src/arch/x86-64/context.c
+++ b/kernel-src/arch/x86-64/context.c
@@ -42,10 +42,11 @@ typedef struct {
 
 void arch_extracontext_detect(void) {
     if (!arch_xsave_size) {
-        if (cpuid_base_max_leaf() >= 0x0d) {
+        cpuid_results_t results;
+	cpuid(1, &results);
+        if (cpuid_base_max_leaf() >= 0x0d && (results.ecx & (1 << 26))) {
             xsave_method = XSAVE;
 
-            cpuid_results_t results;
             cpuid_with_ecx(0x0d, 0, &results);
             xcr0_value = ((uint64_t)results.edx << 32) | results.eax;
             xcr0_value &= XCR0_MASK;