virtio, pc, pci: fixes, cleanups, tests

A bunch of fixes all over the place.
 ACPI tests will now run on more systems: might
 introduce new failure reports but that's for
 the best, isn't it?
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

virtio, pc, pci: fixes, cleanups, tests

A bunch of fixes all over the place.
ACPI tests will now run on more systems: might
introduce new failure reports but that's for
the best, isn't it?

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Fri 12 Jul 2019 15:57:40 BST
# gpg:                using RSA key 281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  virtio pmem: remove transitional names
  virtio pmem: remove memdev null check
  virtio pmem: fix wrong mem region condition
  tests: acpi: do not skip tests when IASL is not installed
  tests: acpi: do not require IASL for dumping AML blobs
  virtio-balloon: fix QEMU 4.0 config size migration incompatibility
  pcie: consistent names for function args
  xio3130_downstream: typo fix

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/core/machine.c

@@ -34,6 +34,7 @@ GlobalProperty hw_compat_4_0[] = {
     { "virtio-vga",     "edid", "false" },
     { "virtio-gpu-pci", "edid", "false" },
     { "virtio-device", "use-started", "false" },
+    { "virtio-balloon-device", "qemu-4-0-config-size", "true" },
 };
 const size_t hw_compat_4_0_len = G_N_ELEMENTS(hw_compat_4_0);
 
@@ -49,6 +50,7 @@ GlobalProperty hw_compat_3_1[] = {
     { "usb-tablet", "serial", "42" },
     { "virtio-blk-device", "discard", "false" },
     { "virtio-blk-device", "write-zeroes", "false" },
+    { "virtio-balloon-device", "qemu-4-0-config-size", "false" },
 };
 const size_t hw_compat_3_1_len = G_N_ELEMENTS(hw_compat_3_1);
 

hw/pci-bridge/xio3130_downstream.c

@@ -43,7 +43,7 @@ static void xio3130_downstream_write_config(PCIDevice *d, uint32_t address,
 {
     uint16_t slt_ctl, slt_sta;
 
-    pcie_cap_slot_get(d, &slt_sta, &slt_ctl);
+    pcie_cap_slot_get(d, &slt_ctl, &slt_sta);
     pci_bridge_write_config(d, address, val, len);
     pcie_cap_flr_write_config(d, address, val, len);
     pcie_cap_slot_write_config(d, slt_ctl, slt_sta, address, val, len);

hw/virtio/virtio-balloon.c

@@ -615,6 +615,22 @@ virtio_balloon_free_page_report_notify(NotifierWithReturn *n, void *data)
     return 0;
 }
 
+static size_t virtio_balloon_config_size(VirtIOBalloon *s)
+{
+    uint64_t features = s->host_features;
+
+    if (s->qemu_4_0_config_size) {
+        return sizeof(struct virtio_balloon_config);
+    }
+    if (virtio_has_feature(features, VIRTIO_BALLOON_F_PAGE_POISON)) {
+        return sizeof(struct virtio_balloon_config);
+    }
+    if (virtio_has_feature(features, VIRTIO_BALLOON_F_FREE_PAGE_HINT)) {
+        return offsetof(struct virtio_balloon_config, poison_val);
+    }
+    return offsetof(struct virtio_balloon_config, free_page_report_cmd_id);
+}
+
 static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data)
 {
     VirtIOBalloon *dev = VIRTIO_BALLOON(vdev);
@@ -635,7 +651,7 @@ static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data)
     }
 
     trace_virtio_balloon_get_config(config.num_pages, config.actual);
-    memcpy(config_data, &config, sizeof(struct virtio_balloon_config));
+    memcpy(config_data, &config, virtio_balloon_config_size(dev));
 }
 
 static int build_dimm_list(Object *obj, void *opaque)
@@ -679,7 +695,7 @@ static void virtio_balloon_set_config(VirtIODevice *vdev,
     uint32_t oldactual = dev->actual;
     ram_addr_t vm_ram_size = get_current_ram_size();
 
-    memcpy(&config, config_data, sizeof(struct virtio_balloon_config));
+    memcpy(&config, config_data, virtio_balloon_config_size(dev));
     dev->actual = le32_to_cpu(config.actual);
     if (dev->actual != oldactual) {
         qapi_event_send_balloon_change(vm_ram_size -
@@ -766,7 +782,7 @@ static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
     int ret;
 
     virtio_init(vdev, "virtio-balloon", VIRTIO_ID_BALLOON,
-                sizeof(struct virtio_balloon_config));
+                virtio_balloon_config_size(s));
 
     ret = qemu_add_balloon_handler(virtio_balloon_to_target,
                                    virtio_balloon_stat, s);
@@ -897,6 +913,12 @@ static Property virtio_balloon_properties[] = {
                     VIRTIO_BALLOON_F_DEFLATE_ON_OOM, false),
     DEFINE_PROP_BIT("free-page-hint", VirtIOBalloon, host_features,
                     VIRTIO_BALLOON_F_FREE_PAGE_HINT, false),
+    /* QEMU 4.0 accidentally changed the config size even when free-page-hint
+     * is disabled, resulting in QEMU 3.1 migration incompatibility.  This
+     * property retains this quirk for QEMU 4.1 machine types.
+     */
+    DEFINE_PROP_BOOL("qemu-4-0-config-size", VirtIOBalloon,
+                     qemu_4_0_config_size, false),
     DEFINE_PROP_LINK("iothread", VirtIOBalloon, iothread, TYPE_IOTHREAD,
                      IOThread *),
     DEFINE_PROP_END_OF_LIST(),

hw/virtio/virtio-pmem-pci.c

@@ -57,7 +57,7 @@ static uint64_t virtio_pmem_pci_get_plugged_size(const MemoryDeviceState *md,
     MemoryRegion *mr = vpc->get_memory_region(pmem, errp);
 
     /* the plugged size corresponds to the region size */
-    return mr ? 0 : memory_region_size(mr);
+    return mr ? memory_region_size(mr) : 0;
 }
 
 static void virtio_pmem_pci_fill_device_info(const MemoryDeviceState *md,
@@ -113,8 +113,6 @@ static void virtio_pmem_pci_instance_init(Object *obj)
 static const VirtioPCIDeviceTypeInfo virtio_pmem_pci_info = {
     .base_name             = TYPE_VIRTIO_PMEM_PCI,
     .generic_name          = "virtio-pmem-pci",
-    .transitional_name     = "virtio-pmem-pci-transitional",
-    .non_transitional_name = "virtio-pmem-pci-non-transitional",
     .instance_size = sizeof(VirtIOPMEMPCI),
     .instance_init = virtio_pmem_pci_instance_init,
     .class_init    = virtio_pmem_pci_class_init,

hw/virtio/virtio-pmem.c

@@ -134,8 +134,8 @@ static void virtio_pmem_fill_device_info(const VirtIOPMEM *pmem,
                                          VirtioPMEMDeviceInfo *vi)
 {
     vi->memaddr = pmem->start;
-    vi->size = pmem->memdev ? memory_region_size(&pmem->memdev->mr) : 0;
+    vi->size    = memory_region_size(&pmem->memdev->mr);
-    vi->memdev = object_get_canonical_path(OBJECT(pmem->memdev));
+    vi->memdev  = object_get_canonical_path(OBJECT(pmem->memdev));
 }
 
 static MemoryRegion *virtio_pmem_get_memory_region(VirtIOPMEM *pmem,

include/hw/pci/pcie.h

@@ -107,9 +107,9 @@ void pcie_cap_lnkctl_reset(PCIDevice *dev);
 
 void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot);
 void pcie_cap_slot_reset(PCIDevice *dev);
-void pcie_cap_slot_get(PCIDevice *dev, uint16_t *slot_ctl, uint16_t *slt_sta);
+void pcie_cap_slot_get(PCIDevice *dev, uint16_t *slt_ctl, uint16_t *slt_sta);
 void pcie_cap_slot_write_config(PCIDevice *dev,
-                                uint16_t old_slot_ctl, uint16_t old_slt_sta,
+                                uint16_t old_slt_ctl, uint16_t old_slt_sta,
                                 uint32_t addr, uint32_t val, int len);
 int pcie_cap_slot_post_load(void *opaque, int version_id);
 void pcie_cap_slot_push_attention_button(PCIDevice *dev);

include/hw/virtio/virtio-balloon.h

@@ -71,6 +71,8 @@ typedef struct VirtIOBalloon {
     int64_t stats_poll_interval;
     uint32_t host_features;
     PartiallyBalloonedPage *pbp;
+
+    bool qemu_4_0_config_size;
 } VirtIOBalloon;
 
 #endif

tests/bios-tables-test.c

@@ -389,6 +389,14 @@ static void test_acpi_asl(test_data *data)
         all_tables_match = all_tables_match &&
             test_acpi_find_diff_allowed(exp_sdt);
 
+        /*
+         *  don't try to decompile if IASL isn't present, in this case user
+         * will just 'get binary file mismatch' warnings and test failure
+         */
+        if (!iasl) {
+            continue;
+        }
+
         err = load_asl(data->tables, sdt);
         asl = normalize_asl(sdt->asl);
 
@@ -431,6 +439,11 @@ static void test_acpi_asl(test_data *data)
         g_string_free(asl, true);
         g_string_free(exp_asl, true);
     }
+    if (!iasl && !all_tables_match) {
+        fprintf(stderr, "to see ASL diff between mismatched files install IASL,"
+                " rebuild QEMU from scratch and re-run tests with V=1"
+                " environment variable set");
+    }
     g_assert(all_tables_match);
 
     free_test_data(&exp_data);
@@ -597,12 +610,10 @@ static void test_acpi_one(const char *params, test_data *data)
     test_acpi_rxsdt_table(data);
     test_acpi_fadt_table(data);
 
-    if (iasl) {
+    if (getenv(ACPI_REBUILD_EXPECTED_AML)) {
-        if (getenv(ACPI_REBUILD_EXPECTED_AML)) {
+        dump_aml_files(data, true);
-            dump_aml_files(data, true);
+    } else {
-        } else {
+        test_acpi_asl(data);
-            test_acpi_asl(data);
-        }
     }
 
     /*