diff options
Diffstat (limited to 'scripts/disk_image')
| -rwxr-xr-x | scripts/disk_image | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/scripts/disk_image b/scripts/disk_image index 69b037f..afd21f9 100755 --- a/scripts/disk_image +++ b/scripts/disk_image @@ -68,6 +68,295 @@ function add_rootfs() fi } +function get_interrupts() +{ + local xen_intr_txt="$1" + local num_fields + local intr_num + local intr_str + local val + local i + + while IFS= read -r val + do + #Remove the prefix "interrupts = <" + val=${val#*"interrupts = <"} + + #Remove the suffix ">;" from each line + val=${val%>;*} + + num_fields=`echo $val | awk '{print NF}'` + + #We expect the following format + #interrupts = <0x00 irq_no flags 0x00 irq_no flags 0x00 irq_no flags ..>; + if test $((num_fields % 3)) -ne 0 + then + return 1 + fi + + #Position of the first interrupt no + i=2 + while test $i -lt $num_fields + do + intr_num=`echo $val | awk -v i="$i" '{print $i}'` + + #The next irq_no will be after 3 places + i=$((i+3)) + + intr_num=$((intr_num + 32)) + + if test "$intr_str" + then + intr_str="$intr_str," + fi + intr_str="$intr_str"$intr_num + done + + done < "$xen_intr_txt" + + if test "$intr_str" + then + echo "$intr_str" + fi +} + +function contains() +{ + local item="$1" + local list="$2" + local each + + for each in $list + do + if test "$each" = "$item" + then + echo "yes" + fi + done +} + +function check_if_force_assign_iommu() +{ + local xen_path="$1" + local dtb="$2" + local node="$3" + local path + local subnode + local subnode_cnt + local props + local xen_path_present + local assign_present + + subnode_cnt=$(fdtget -l "$dtb" "$node" | wc -l) + + props=$(fdtget -p "$dtb" "$node") + xen_path_present=$(contains "xen,path" "$props") + assign_present=$(contains "xen,force-assign-without-iommu" "$props") + + if test "$xen_path_present" = "yes" && test "$assign_present" = "yes" + then + path=$(fdtget "$dtb" "$node" "xen,path") + if test "$path" = "$xen_path" + then + echo "yes" + return 0 + fi + fi + + if test $subnode_cnt -gt 0 + then + for subnode in `fdtget -l "$dtb" "$node"` + do + subnode="$node/$subnode" + check_if_force_assign_iommu "$xen_path" "$dtb" "$subnode" + done + fi +} + +function get_iommu_prop() +{ + local xen_path_txt="$1" + local domU_dtb="$2" + local dtdev_str + local devpath + local force_assign + + #Iterate through all the lines in the file + while IFS= read -r devpath + do + #Extract the path of the device from each line + # + #For eg, the line may be as follows + #xen,path = "/axi/serial@ff010000"; + # + #What we want is the following substring + #"/axi/serial@ff010000" + devpath=`echo $devpath | awk '{print $3}'` + devpath=${devpath#*\"} + devpath=${devpath%\";*} + + force_assign=$(check_if_force_assign_iommu "$devpath" "$domU_dtb" "/passthrough") + + if test -z "$force_assign" + then + if test "$dtdev_str" + then + dtdev_str="$dtdev_str, " + fi + dtdev_str=${dtdev_str}"\""${devpath}"\"" + fi + + done < "$xen_path_txt" + + if test "$dtdev_str" + then + echo "$dtdev_str" + fi +} + +function get_iomem() +{ + local xen_reg_txt="$1" + local addr="$2" + local size="$3" + local val + local i + local num_fields + local iomem_str + local address_size_pair + local mfn + local gfn + local size_ + local PAGE_SHIFT=12 + + #Iterate through all the lines in the file + #The file will look similar to the following:- + # + #xen,reg = <0x00 0xff010000 0x00 0x1000 0x00 0xff010000 0x00 0xff110000 0x00 0x1000 0x00 0xff110000 0x00 0xff120000 0x00 0x1000 0x00 0xff120000 0x00 0xff130000 0x00 0x1000 0x00 0xff130000 0x00 0xff140000 0x00 0x1000 0x00 0xff140000>; + #xen,reg = <0x00 0xfd0c0000 0x00 0x2000 0x00 0xfd0c0000>; + while IFS= read -r val + do + #Remove the prefix "xen,reg = <" from each line + val=${val#*"xen,reg = <"} + + #Remove the suffix ">;" from each line + val=${val%>;*} + + num_fields=`echo $val | awk '{print NF}'` + + i=0 + + while test $i -lt $num_fields + do + + i=$((i + addr)) + + #Extract the iomem physical address + mfn=`echo $val | awk -v i="$i" '{print $i}'` + + #Calculate the page address + mfn=0x$(printf "%X" $(( $((mfn>>PAGE_SHIFT)) & 0xfffff)) ) + + i=$((i + size)) + + #Extract the size of the iomem address + size_=`echo $val | awk -v i="$i" '{print $i}'` + + #Calculatde the number of pages + size_=$(printf "%X" $(( $((size_>>PAGE_SHIFT)) & 0xfffff)) ) + + i=$((i + addr)) + + #Extract the iomem guest address + gfn=`echo $val | awk -v i="$i" '{print $i}'` + + #Calculate the page address + gfn=0x$(printf "%X" $(( $((gfn>>PAGE_SHIFT)) & 0xfffff)) ) + + if test "$gfn" != "$mfn" + then + address_size_pair="\"$mfn,${size_}@${gfn}\"" + else + address_size_pair="\"$mfn,$size_\"" + fi + + if test "$iomem_str" + then + iomem_str="$iomem_str, $address_size_pair" + else + iomem_str=$address_size_pair + fi + done + + done < "$xen_reg_txt" + + if test "$iomem_str" + then + echo "$iomem_str" + fi +} + +function update_domU_cfg() +{ + local domU_dtb="$1" + local domU_cfg_file="$2" + local addr=$(fdtget $domU_dtb /passthrough \#address-cells) + local size=$(fdtget $domU_dtb /passthrough \#size-cells) + local iomem_str + local dtdev_str + local intr_str + local tmp_dts + local tmp_search_results + + tmp_dts=`mktemp` + tmp_files+=($tmp_dts) + dtc -I dtb -O dts -o "$tmp_dts" "$domU_dtb" + + tmp_search_results=`mktemp` + tmp_files+=($tmp_search_results) + + #Let's get all the lines containing xen,path in a file + grep 'xen,reg' "$tmp_dts" > "$tmp_search_results" + + #From "xen,reg", one can determine the "iomem" attribute of the + #cfg file. + iomem_str="$(get_iomem $tmp_search_results $addr $size)" + if test -z "$iomem_str" + then + echo "Error occurred while generating the iomem property" + return 1 + else + iomem_str="iomem = [ "$iomem_str" ]" + echo "${iomem_str}" >> $domU_cfg_file + fi + + #Let's get all the lines containing xen,path in a file + grep 'xen,path' $tmp_dts > $tmp_search_results + + #From "xen,path", one can determine the "dtdev" attribute of the + #cfg file. This attribute is optional. + dtdev_str=$(get_iommu_prop $tmp_search_results $domU_dtb) + if test "$dtdev_str" + then + dtdev_str="dtdev = [ "$dtdev_str" ]" + echo "${dtdev_str}" >> $domU_cfg_file + fi + + #Let's get all the lines containing interrupts in a file + grep 'interrupts' $tmp_dts > $tmp_search_results + + #From "interrupts", one can determine the "irqs" attribute of the + #cfg file. + intr_str=$(get_interrupts $tmp_search_results) + if test "$intr_str" + then + intr_str="irqs = [ "$intr_str" ]" + echo "${intr_str}" >> $domU_cfg_file + fi + + return 0 +} + function generate_domU_configs() { local i=0 @@ -136,6 +425,14 @@ function generate_domU_configs() add_rootfs $n echo "disk=[\"$retval,,xvda\"]" >> $dest fi + + update_domU_cfg ${DOMU_PASSTHROUGH_DTB[$i]} $dest + if test $? -ne 0 + then + umount $DESTDIR/part/disk$j + cleanup_disk_image_error + exit 1 + fi fi n=$(( $n + 1 )) |