[RFC PATCH 20/39] KVM: selftests: Add private_mem_conversions_test.sh

[Ackerley Tng]

Add private_mem_conversions_test.sh to automate testing of different
combinations of private_mem_conversions_test.

Signed-off-by: Ackerley Tng <ackerleytng@xxxxxxxxxx>

---
 .../x86_64/private_mem_conversions_test.sh    | 88 +++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100755 tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.sh

diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.sh b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.sh
new file mode 100755
index 000000000000..fb6705fef466
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.sh
@@ -0,0 +1,88 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-only */
+#
+# Wrapper script which runs different test setups of
+# private_mem_conversions_test.
+#
+# tools/testing/selftests/kvm/private_mem_conversions_test.sh
+# Copyright (C) 2023, Google LLC.
+
+set -e
+
+num_vcpus_to_test=4
+num_memslots_to_test=$num_vcpus_to_test
+
+get_default_hugepage_size_in_kB() {
+  grep "Hugepagesize:" /proc/meminfo | grep -o '[[:digit:]]\+'
+}
+
+# Required pages are based on the test setup (see computation for memfd_size) in
+# test_mem_conversions() in private_mem_migrate_tests.c)
+
+# These static requirements are set to the maximum required for
+# num_vcpus_to_test, over all the hugetlb-related tests
+required_num_2m_hugepages=$(( 1024 * num_vcpus_to_test ))
+required_num_1g_hugepages=$(( 2 * num_vcpus_to_test ))
+
+# The other hugetlb sizes are not supported on x86_64
+[ "$(cat /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages 2>/dev/null || echo 0)" -ge "$required_num_2m_hugepages" ] && hugepage_2mb_enabled=1
+[ "$(cat /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages 2>/dev/null || echo 0)" -ge "$required_num_1g_hugepages" ] && hugepage_1gb_enabled=1
+
+case $(get_default_hugepage_size_in_kB) in
+  2048)
+    hugepage_default_enabled=$hugepage_2mb_enabled
+    ;;
+  1048576)
+    hugepage_default_enabled=$hugepage_1gb_enabled
+    ;;
+  *)
+    hugepage_default_enabled=0
+    ;;
+esac
+
+backing_src_types=( anonymous )
+backing_src_types+=( anonymous_thp )
+[ -n "$hugepage_default_enabled" ] && \
+    backing_src_types+=( anonymous_hugetlb ) || echo "skipping anonymous_hugetlb backing source type"
+[ -n "$hugepage_2mb_enabled" ] && \
+    backing_src_types+=( anonymous_hugetlb_2mb ) || echo "skipping anonymous_hugetlb_2mb backing source type"
+[ -n "$hugepage_1gb_enabled" ] && \
+    backing_src_types+=( anonymous_hugetlb_1gb ) || echo "skipping anonymous_hugetlb_1gb backing source type"
+backing_src_types+=( shmem )
+[ -n "$hugepage_default_enabled" ] && \
+  backing_src_types+=( shared_hugetlb ) || echo "skipping shared_hugetlb backing source type"
+
+private_mem_backing_src_types=( private_mem_guest_mem )
+[ -n "$hugepage_default_enabled" ] && \
+    private_mem_backing_src_types+=( private_mem_hugetlb ) || echo "skipping private_mem_hugetlb backing source type"
+[ -n "$hugepage_2mb_enabled" ] && \
+    private_mem_backing_src_types+=( private_mem_hugetlb_2mb ) || echo "skipping private_mem_hugetlb_2mb backing source type"
+[ -n "$hugepage_1gb_enabled" ] && \
+    private_mem_backing_src_types+=( private_mem_hugetlb_1gb ) || echo "skipping private_mem_hugetlb_1gb backing source type"
+
+set +e
+
+TEST_EXECUTABLE="$(dirname "$0")/private_mem_conversions_test"
+
+(
+	set -e
+
+	for src_type in "${backing_src_types[@]}"; do
+
+		for private_mem_src_type in "${private_mem_backing_src_types[@]}"; do
+			set -x
+
+			$TEST_EXECUTABLE -s "$src_type" -p "$private_mem_src_type" -n $num_vcpus_to_test
+			$TEST_EXECUTABLE -s "$src_type" -p "$private_mem_src_type" -n $num_vcpus_to_test -m $num_memslots_to_test
+
+			{ set +x; } 2>/dev/null
+
+			echo
+
+		done
+
+	done
+)
+RET=$?
+
+exit $RET
-- 
2.46.0.598.g6f2099f65c-goog