Revise tpm API, add sanity check for mount proc

1. Update tpm2_getcap with new flag style 2. Installer fails vgchange in rare cases where /proc is not mounted in time, add failsafe checks to ensure it exists

Author: shahs-ais

part2/stages/Functions/install-main

@@ -41,6 +41,11 @@ mk_xc_lvm()
 {
     local PARTITION_DEV="$1"
 
+    # Ensure /proc is mounted
+    if ! mountpoint -q /proc; then
+        mount -t proc proc /proc || return 1
+    fi
+
     do_cmd vgchange -a n || return 1
 
     do_cmd pvcreate -ff -y "${PARTITION_DEV}" || return 1

part2/stages/Remove-partitions

@@ -22,6 +22,11 @@
 . ${DISK_CONF}
 # ^^^ defines ${TARGET_DISK}
 
+# Ensure /proc is mounted
+if ! mountpoint -q /proc; then
+    mount -t proc proc /proc || return 1
+fi
+
 # Deactivate LVs in all VGs.
 do_cmd vgchange -a n >&2
 

part2/stages/TPM-Check

@@ -68,7 +68,7 @@ log_tpm_attrs() {
     tpm2=$?
     if [ "${tpm2}" -eq 0 ];
     then
-        tpm2_getcap --capability=properties-fixed >&2
+        tpm2_getcap properties-fixed >&2
     else
         tpm_version >&2
     fi