[Qemu-devel] [PATCH] pci-testdev: add nodata test

["Michael S. Tsirkin" <mst@redhat.com>]

Add nodata test where data length is ignored.
Skip it for port IO since kvm does not support it there.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/misc/pci-testdev.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/hw/misc/pci-testdev.c b/hw/misc/pci-testdev.c
index 26b9b86..b6e11d6 100644
--- a/hw/misc/pci-testdev.c
+++ b/hw/misc/pci-testdev.c
@@ -45,6 +45,7 @@ typedef struct IOTest {
 
 #define IOTEST_DATAMATCH 0xFA
 #define IOTEST_NOMATCH   0xCE
+#define IOTEST_NODATA  0xAB
 
 #define IOTEST_IOSIZE 128
 #define IOTEST_MEMSIZE 2048
@@ -52,7 +53,8 @@ typedef struct IOTest {
 static const char *iotest_test[] = {
     "no-eventfd",
     "wildcard-eventfd",
-    "datamatch-eventfd"
+    "datamatch-eventfd",
+    "nodata-eventfd"
 };
 
 static const char *iotest_type[] = {
@@ -261,12 +263,19 @@ static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp)
         memcpy(test->hdr->name, name, strlen(name) + 1);
         g_free(name);
         test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH);
-        test->size = IOTEST_ACCESS_WIDTH;
-        test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd");
+        test->size = strcmp(IOTEST_TEST(i), "nodata-eventfd") ? IOTEST_ACCESS_WIDTH : 0;
+
+        test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd") &&
+                             strcmp(IOTEST_TEST(i), "nodata-eventfd");
         test->hdr->test = i;
         test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH;
         test->hdr->width = IOTEST_ACCESS_WIDTH;
         test->mr = IOTEST_REGION(d, i);
+
+        if (!test->size && !IOTEST_IS_MEM(i)) {
+            test->hasnotifier = false;
+            continue;
+        }
         if (!strcmp(IOTEST_TEST(i), "no-eventfd")) {
             test->hasnotifier = false;
             continue;
-- 
MST