dracut.sh: Support early microcode loading.

[platform/upstream/dracut.git] / dracut-functions.sh

diff --git a/dracut-functions.sh b/dracut-functions.sh
index 54c654e..4e1c90c 100755 (executable)
--- a/dracut-functions.sh
+++ b/dracut-functions.sh
@@ -1667,3 +1667,36 @@ instmods() {
     _ret=$?
     return $_ret
 }
+# get_cpu_vendor
+# Only two values are returned: AMD or Intel
+get_cpu_vendor ()
+{
+    if grep -qE AMD /proc/cpuinfo; then
+        printf "AMD"
+    fi
+    if grep -qE Intel /proc/cpuinfo; then
+        printf "Intel"
+    fi
+}
+
+# get_host_ucode
+# Get the hosts' ucode file based on the /proc/cpuinfo
+get_ucode_file ()
+{
+    local family=`grep -E "cpu family" /proc/cpuinfo | head -1 | sed s/.*:\ //`
+    local model=`grep -E "model" /proc/cpuinfo |grep -v name | head -1 | sed s/.*:\ //`
+    local stepping=`grep -E "stepping" /proc/cpuinfo | head -1 | sed s/.*:\ //`
+
+    if [[ "$(get_cpu_vendor)" == "AMD" ]]; then
+        # If family greater or equal than 0x15
+        if [[ $family -ge 21 ]]; then
+            printf "microcode_amd_fam15h.bin"
+        else
+            printf "microcode_amd.bin"
+        fi
+    fi
+    if [[ "$(get_cpu_vendor)" == "Intel" ]]; then
+        # The /proc/cpuinfo are in decimal.
+        printf "%02x-%02x-%02x" ${family} ${model} ${stepping}
+    fi
+}