[PATCH v4 10/11] tests/acpi: unit test exercizing hotplug off for pci root bus & bridge in i440fx

[Ani Sinha <ani@anisinha.ca>]

This change adds a unit test to exercize the case when hotplug is disabled both for
pci root bus and the pci bridges by passing the following two switches to qemu:

  -global PIIX4_PM.acpi-root-pci-hotplug=off
  -global PIIX4_PM.acpi-pci-hotplug-with-bridge-support=off

bios-tables-test-allowed-diff.h documents the fact that a new DSDT acpi gold master
binary blob we need to be added to test this. We will do the actual addition in the
next patch in the series.

The following link contains the disassembly of the DSDT table after passing the above
two switches to qemu: https://pastebin.ubuntu.com/p/WvpYYjpPN8/

Signed-off-by: Ani Sinha <ani@anisinha.ca>
---
 tests/qtest/bios-tables-test-allowed-diff.h |  1 +
 tests/qtest/bios-tables-test.c              | 19 ++++++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/tests/qtest/bios-tables-test-allowed-diff.h b/tests/qtest/bios-tables-test-allowed-diff.h
index dfb8523c8b..dea61d94f1 100644
--- a/tests/qtest/bios-tables-test-allowed-diff.h
+++ b/tests/qtest/bios-tables-test-allowed-diff.h
@@ -1 +1,2 @@
 /* List of comma-separated changed AML files to ignore */
+"tests/data/acpi/pc/DSDT.hpbrroot",
diff --git a/tests/qtest/bios-tables-test.c b/tests/qtest/bios-tables-test.c
index 7632cfe1be..4c834474ad 100644
--- a/tests/qtest/bios-tables-test.c
+++ b/tests/qtest/bios-tables-test.c
@@ -768,6 +768,21 @@ static void test_acpi_piix4_bridge_hotplug(void)
     free_test_data(&data);
 }
 
+static void test_acpi_piix4_bridge_root_hotplug(void)
+{
+    test_data data;
+
+    memset(&data, 0, sizeof(data));
+    data.machine = MACHINE_PC;
+    data.variant = ".hpbrroot";
+    data.required_struct_types = base_required_struct_types;
+    data.required_struct_types_len = ARRAY_SIZE(base_required_struct_types);
+    test_acpi_one("-global PIIX4_PM.acpi-root-pci-hotplug=off "
+                  "-global PIIX4_PM.acpi-pci-hotplug-with-bridge-support=off "
+                  "-device pci-bridge,chassis_nr=1", &data);
+    free_test_data(&data);
+}
+
 static void test_acpi_q35_tcg(void)
 {
     test_data data;
@@ -1172,8 +1187,10 @@ int main(int argc, char *argv[])
         qtest_add_func("acpi/q35/tpm-tis", test_acpi_q35_tcg_tpm_tis);
         qtest_add_func("acpi/piix4", test_acpi_piix4_tcg);
         qtest_add_func("acpi/piix4/bridge", test_acpi_piix4_tcg_bridge);
-        qtest_add_func("acpi/piix4/hotplug", test_acpi_piix4_root_hotplug);
+        qtest_add_func("acpi/piix4/roothotplug", test_acpi_piix4_root_hotplug);
         qtest_add_func("acpi/piix4/brhotplug", test_acpi_piix4_bridge_hotplug);
+        qtest_add_func("acpi/piix4/disablehp",
+                       test_acpi_piix4_bridge_root_hotplug);
         qtest_add_func("acpi/q35", test_acpi_q35_tcg);
         qtest_add_func("acpi/q35/bridge", test_acpi_q35_tcg_bridge);
         qtest_add_func("acpi/q35/mmio64", test_acpi_q35_tcg_mmio64);
-- 
2.17.1