Add a new configure option "--dirty-ring-size" to support dirty-ring
migration on arm64. By default, the dirty-ring is disabled, we can
enable it by:
# ./configure --dirty-ring-size=65536
This will generate one more entry in config.mak, it will look like:
# cat config.mak
:
ACCEL=kvm,dirty-ring-size=65536
With this configure option, user can easy enable dirty-ring and specify
dirty-ring-size to test the dirty-ring in migration.
Signed-off-by: Shaoqin Huang <shahuang@xxxxxxxxxx>
---
configure | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/configure b/configure
index 6ee9b27..54ce38a 100755
--- a/configure
+++ b/configure
@@ -32,6 +32,7 @@ enable_dump=no
page_size=
earlycon=
efi=
+dirty_ring_size=
# Enable -Werror by default for git repositories only (i.e. developer builds)
if [ -e "$srcdir"/.git ]; then
@@ -89,6 +90,9 @@ usage() {
--[enable|disable]-efi Boot and run from UEFI (disabled by default, x86_64 and arm64 only)
--[enable|disable]-werror
Select whether to compile with the -Werror compiler flag
+ --dirty-ring-size=SIZE
+ Specify the dirty-ring size and enable dirty-ring for
+ migration(disable dirty-ring by default, arm64 only)
EOF
exit 1
}
@@ -174,6 +178,9 @@ while [[ "$1" = -* ]]; do
--disable-werror)
werror=
;;
+ --dirty-ring-size)
+ dirty_ring_size="$arg"
+ ;;
--help)
usage
;;
@@ -213,6 +220,27 @@ if [ "$efi" ] && [ "$arch" != "x86_64" ] && [ "$arch" != "arm64" ]; then
usage
fi
+if [ "$dirty_ring_size" ]; then
+ if [ "$arch" != "arm64" ]; then
+ echo "--dirty-ring-size is not supported for $arch"
+ usage
+ fi
+ _size=$dirty_ring_size
+ if [ ! "${_size//[0-9]}" ]; then
+ if (( _size < 1024 )); then
+ echo "--dirty-ring-size suggest minimum value is 1024"
+ usage
+ fi
+ if (( _size & (_size - 1) )); then
+ echo "--dirty-ring-size must be a power of two"
+ usage
+ fi
+ else
+ echo "--dirty-ring-size must be positive number and a power of two"
+ usage
+ fi
+fi
+
if [ -z "$page_size" ]; then
if [ "$efi" = 'y' ] && [ "$arch" = "arm64" ]; then
page_size="4096"
@@ -419,6 +447,9 @@ EOF
if [ "$arch" = "arm" ] || [ "$arch" = "arm64" ]; then
echo "TARGET=$target" >> config.mak
fi
+if [ "$arch" = "arm64" ] && [ "$dirty_ring_size" ]; then
+ echo "ACCEL=kvm,dirty-ring-size=$dirty_ring_size" >> config.mak
+fi
cat <<EOF > lib/config.h
#ifndef _CONFIG_H_
--
2.40.1
