From 99b66bddd02c7401cc10255de328fbbd95715799 Mon Sep 17 00:00:00 2001
From: "Oritorius(Denis Rykov)" <drycov@gmail.com>
Date: Thu, 10 Jul 2025 00:00:48 +0500
Subject: [PATCH] Update CHECK-IOMMU.sh feat(script): add IOMMU enablement
 check with kernel log analysis

- Introduced check-iommu-enabled.sh to verify if IOMMU is enabled in the current system
- Parses 'dmesg' output for common Intel (VT-d), AMD (SVM), and DMAR/IOMMU entries
- Displays diagnostic result with a helpful recommendation if IOMMU is not active
- Includes root privilege warning and user-friendly output with ANSI color codes
- Useful for verifying virtualization passthrough readiness (e.g., PCIe, GPU)
---
 tools/CHECK-IOMMU.sh | 43 +++++++++++++++++++++++++++++++++++--------
 1 file changed, 35 insertions(+), 8 deletions(-)

diff --git a/tools/CHECK-IOMMU.sh b/tools/CHECK-IOMMU.sh
index 453f2b7..a2bc5e5 100755
--- a/tools/CHECK-IOMMU.sh
+++ b/tools/CHECK-IOMMU.sh
@@ -1,16 +1,43 @@
 #!/bin/bash
 # 
 # Script: check-iommu-enabled.sh
-# Goal: Check if IOMMU are Enabled in your system
+# Goal: Check if IOMMU is enabled in the system
 # 
 # Author: Gabriel Luchina
-# https://luchina.com.br
+# https://luchina.com.br   
 # 20220128T1112
+# Updated: 2025-04-06
+#
 
-if [ `dmesg | grep -e DMAR -e IOMMU | wc -l` -gt 0 ]
-then
-    echo "IOMMU Enabled"
-else
-    echo "IOMMU NOT Enabled"
-    echo "Check file /etc/default/grub contains 'intel_iommu=on' in 'GRUB_CMDLINE_LINUX_DEFAULT' line"
+# ANSI Colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[0;33m'
+NC='\033[0m' # No Color
+
+# Check for root
+if [ "$EUID" -ne 0 ]; then
+    echo -e "${YELLOW}Предупреждение: Рекомендуется запускать от root для полного доступа.${NC}"
+fi
+
+echo "Checking if IOMMU is enabled..."
+
+# Check dmesg output for IOMMU-related messages
+iommu_check=$(dmesg | grep -i -E 'iommu|DMAR|amd-vi')
+
+if [[ -n "$iommu_check" ]]; then
+    echo -e "${GREEN}✅ IOMMU активирован в ядре!${NC}"
+    echo
+    echo "Найденные записи:"
+    echo "$iommu_check"
+else
+    echo -e "${RED}❌ IOMMU не обнаружен или выключен.${NC}"
+    echo
+    echo -e "${YELLOW}Возможные причины:${NC}"
+    echo "1. В BIOS/UEFI отключена поддержка IOMMU (SVM Mode для AMD / VT-d для Intel)"
+    echo "2. Не добавлен параметр загрузки ядра:"
+    echo "   Для Intel: intel_iommu=on"
+    echo "   Для AMD: amd_iommu=on"
+    echo "   Добавьте их в GRUB_CMDLINE_LINUX_DEFAULT в /etc/default/grub"
+    echo "   Затем выполните: update-grub"
 fi