[PULL 13/16] virtio-iommu: Fix endianness in get_config

[Thomas Huth <thuth@redhat.com>]

From: Eric Auger <eric.auger@redhat.com>

Endianess is not properly handled when populating
the returned config. Use the cpu_to_le* primitives
for each separate field. Also, while at it, trace
the domain range start.

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Message-Id: <20211127072910.1261824-3-eric.auger@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 hw/virtio/trace-events   |  2 +-
 hw/virtio/virtio-iommu.c | 24 ++++++++++++++++--------
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index 54bd7da00c..f7ad6be5fb 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -91,7 +91,7 @@ virtio_mmio_setting_irq(int level) "virtio_mmio setting IRQ %d"
 virtio_iommu_device_reset(void) "reset!"
 virtio_iommu_get_features(uint64_t features) "device supports features=0x%"PRIx64
 virtio_iommu_device_status(uint8_t status) "driver status = %d"
-virtio_iommu_get_config(uint64_t page_size_mask, uint64_t start, uint64_t end, uint32_t domain_range, uint32_t probe_size) "page_size_mask=0x%"PRIx64" start=0x%"PRIx64" end=0x%"PRIx64" domain_range=%d probe_size=0x%x"
+virtio_iommu_get_config(uint64_t page_size_mask, uint64_t start, uint64_t end, uint32_t domain_start, uint32_t domain_end, uint32_t probe_size) "page_size_mask=0x%"PRIx64" input range start=0x%"PRIx64" input range end=0x%"PRIx64" domain range start=%d domain range end=%d probe_size=0x%x"
 virtio_iommu_attach(uint32_t domain_id, uint32_t ep_id) "domain=%d endpoint=%d"
 virtio_iommu_detach(uint32_t domain_id, uint32_t ep_id) "domain=%d endpoint=%d"
 virtio_iommu_map(uint32_t domain_id, uint64_t virt_start, uint64_t virt_end, uint64_t phys_start, uint32_t flags) "domain=%d virt_start=0x%"PRIx64" virt_end=0x%"PRIx64 " phys_start=0x%"PRIx64" flags=%d"
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 645c0aa399..30ee09187b 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -822,14 +822,22 @@ unlock:
 static void virtio_iommu_get_config(VirtIODevice *vdev, uint8_t *config_data)
 {
     VirtIOIOMMU *dev = VIRTIO_IOMMU(vdev);
-    struct virtio_iommu_config *config = &dev->config;
-
-    trace_virtio_iommu_get_config(config->page_size_mask,
-                                  config->input_range.start,
-                                  config->input_range.end,
-                                  config->domain_range.end,
-                                  config->probe_size);
-    memcpy(config_data, &dev->config, sizeof(struct virtio_iommu_config));
+    struct virtio_iommu_config *dev_config = &dev->config;
+    struct virtio_iommu_config *out_config = (void *)config_data;
+
+    out_config->page_size_mask = cpu_to_le64(dev_config->page_size_mask);
+    out_config->input_range.start = cpu_to_le64(dev_config->input_range.start);
+    out_config->input_range.end = cpu_to_le64(dev_config->input_range.end);
+    out_config->domain_range.start = cpu_to_le32(dev_config->domain_range.start);
+    out_config->domain_range.end = cpu_to_le32(dev_config->domain_range.end);
+    out_config->probe_size = cpu_to_le32(dev_config->probe_size);
+
+    trace_virtio_iommu_get_config(dev_config->page_size_mask,
+                                  dev_config->input_range.start,
+                                  dev_config->input_range.end,
+                                  dev_config->domain_range.start,
+                                  dev_config->domain_range.end,
+                                  dev_config->probe_size);
 }
 
 static uint64_t virtio_iommu_get_features(VirtIODevice *vdev, uint64_t f,
-- 
2.27.0