From e09d0cf2215cff2c59428a05bfbc18797e204b84 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Lesimple?= <speed47_github@speed47.net>
Date: Tue, 31 Mar 2026 22:08:02 +0200
Subject: [PATCH] enh: check_cpu: look for cap_stibp and cap_autoibrs

---
 src/libs/400_hw_check.sh | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/libs/400_hw_check.sh b/src/libs/400_hw_check.sh
index cd1d1b4..e92776e 100644
--- a/src/libs/400_hw_check.sh
+++ b/src/libs/400_hw_check.sh
@@ -481,26 +481,27 @@ check_cpu() {
     pr_info_nol "    * CPU indicates STIBP capability: "
     # intel: A processor supports STIBP if it enumerates CPUID (EAX=7H,ECX=0):EDX[27] as 1
     # amd: 8000_0008 EBX[15]=1
+    cap_stibp=''
     if is_intel; then
         read_cpuid 0x7 0x0 $EDX 27 1 1
         ret=$?
         if [ $ret = $READ_CPUID_RET_OK ]; then
             pstatus green YES "Intel STIBP feature bit"
-            #cpuid_stibp='Intel STIBP'
+            cap_stibp='Intel STIBP'
         fi
     elif is_amd; then
         read_cpuid 0x80000008 0x0 $EBX 15 1 1
         ret=$?
         if [ $ret = $READ_CPUID_RET_OK ]; then
             pstatus green YES "AMD STIBP feature bit"
-            #cpuid_stibp='AMD STIBP'
+            cap_stibp='AMD STIBP'
         fi
     elif is_hygon; then
         read_cpuid 0x80000008 0x0 $EBX 15 1 1
         ret=$?
         if [ $ret = $READ_CPUID_RET_OK ]; then
             pstatus green YES "HYGON STIBP feature bit"
-            #cpuid_stibp='HYGON STIBP'
+            cap_stibp='HYGON STIBP'
         fi
     else
         ret=invalid
@@ -1006,6 +1007,20 @@ check_cpu() {
         else
             pstatus yellow UNKNOWN "$ret_read_cpuid_msg"
         fi
+
+        pr_info_nol "    * CPU indicates AutoIBRS capability: "
+        cap_autoibrs=''
+        read_cpuid 0x80000021 0x0 $EAX 8 1 1
+        ret=$?
+        if [ $ret = $READ_CPUID_RET_OK ]; then
+            pstatus green YES
+            cap_autoibrs=1
+        elif [ $ret = $READ_CPUID_RET_KO ]; then
+            pstatus yellow NO
+            cap_autoibrs=0
+        else
+            pstatus yellow UNKNOWN "$ret_read_cpuid_msg"
+        fi
     fi
 
     pr_info_nol "  * CPU supports Transactional Synchronization Extensions (TSX): "