[PATCH v2 16/17] tests/qtest/ide-test: cover the CHS translation across resets

["Denis V. Lunev" <den@openvz.org>]

From: Denis V. Lunev <den@openvz.org>

A translation the guest selected has to survive a software reset and not a
hardware one, and the two arrive at the same ide_reset(), so a fix for
either direction can break the other. Select a translation, put the drive
through a software reset and then through a machine reset, and name the
sector each translation picks along the way.

The marker read says which translation the device is addressing the disk
with, while IDENTIFY DEVICE words 55 and 56 say which one it reports. The
machine reset leaves the PCI command register cleared, so the device has
to be enabled again before the ports answer.

Cc: John Snow <jsnow@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
---
 tests/qtest/ide-test.c | 46 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/tests/qtest/ide-test.c b/tests/qtest/ide-test.c
index e7a56e0710..f14a0851f0 100644
--- a/tests/qtest/ide-test.c
+++ b/tests/qtest/ide-test.c
@@ -1639,6 +1639,51 @@ static void test_specify_identify_default(void)
     ide_test_quit(qts);
 }
 
+/* A hardware reset reverts the translation (ATA-5 9.1), SRST does not (9.2) */
+static void test_specify_reset(void)
+{
+    QTestState *qts;
+    QPCIDevice *dev;
+    QPCIBar bmdma_bar, ide_bar, ide_bar2;
+    uint16_t buf[256];
+    char marker[9];
+
+    qts = ide_test_start(
+        "-blockdev driver=file,node-name=hda,filename=%s "
+        "-device ide-hd,drive=hda,bus=ide.0,unit=0 ",
+        tmp_path[0]);
+    dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
+    ide_bar2 = qpci_legacy_iomap(dev, IDE_BASE2);
+
+    ide_prepare_markers(qts, dev, ide_bar);
+    ide_set_translation(dev, ide_bar, 8, 32);
+    ide_read_chs_marker(qts, dev, ide_bar, 0, 1, 1, marker);
+    g_assert_cmpstr(marker, ==, CHS_MARKER_CUSTOM);
+
+    qpci_io_writeb(dev, ide_bar2, 0, IDE_CTRL_RESET);
+    qpci_io_writeb(dev, ide_bar2, 0, 0);
+    ide_wait_clear(qts, BSY);
+
+    ide_identify_words(dev, ide_bar, buf);
+    g_assert_cmpint(buf[55], ==, 8);
+    g_assert_cmpint(buf[56], ==, 32);
+    ide_read_chs_marker(qts, dev, ide_bar, 0, 1, 1, marker);
+    g_assert_cmpstr(marker, ==, CHS_MARKER_CUSTOM);
+
+    qtest_qmp_assert_success(qts, "{ 'execute': 'system_reset' }");
+    qtest_qmp_eventwait(qts, "RESET");
+    qpci_device_enable(dev);
+
+    ide_identify_words(dev, ide_bar, buf);
+    g_assert_cmpint(buf[55], ==, 16);
+    g_assert_cmpint(buf[56], ==, 63);
+    ide_read_chs_marker(qts, dev, ide_bar, 0, 1, 1, marker);
+    g_assert_cmpstr(marker, ==, CHS_MARKER_DEFAULT);
+
+    free_pci_device(dev);
+    ide_test_quit(qts);
+}
+
 static void test_cdrom_pio(void)
 {
     cdrom_read_impl(1, CDROM_PIO);
@@ -1714,6 +1759,7 @@ int main(int argc, char **argv)
     qtest_add_func("/ide/specify/identify", test_specify_identify);
     qtest_add_func("/ide/specify/identify_default",
                    test_specify_identify_default);
+    qtest_add_func("/ide/specify/reset", test_specify_reset);
     qtest_add_func("/ide/migration/chs_translation",
                    test_migrate_chs_translation);
     qtest_add_func("/ide/migration/chs_snapshot", test_migrate_chs_snapshot);
-- 
2.53.0