[PULL 29/33] util/vfio-helpers: Trace PCI BAR region info

[Stefan Hajnoczi]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

For debug purpose, trace BAR regions info.

Reviewed-by: Fam Zheng <fam@euphon.net>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20201103020733.2303148-4-philmd@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
---
 util/vfio-helpers.c | 8 ++++++++
 util/trace-events   | 1 +
 2 files changed, 9 insertions(+)

diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c
index 1d4efafcaa..cd6287c3a9 100644
--- a/util/vfio-helpers.c
+++ b/util/vfio-helpers.c
@@ -136,6 +136,7 @@ static inline void assert_bar_index_valid(QEMUVFIOState *s, 
int index)
 
 static int qemu_vfio_pci_init_bar(QEMUVFIOState *s, int index, Error **errp)
 {
+    g_autofree char *barname = NULL;
     assert_bar_index_valid(s, index);
     s->bar_region_info[index] = (struct vfio_region_info) {
         .index = VFIO_PCI_BAR0_REGION_INDEX + index,
@@ -145,6 +146,10 @@ static int qemu_vfio_pci_init_bar(QEMUVFIOState *s, int 
index, Error **errp)
         error_setg_errno(errp, errno, "Failed to get BAR region info");
         return -errno;
     }
+    barname = g_strdup_printf("bar[%d]", index);
+    trace_qemu_vfio_region_info(barname, s->bar_region_info[index].offset,
+                                s->bar_region_info[index].size,
+                                s->bar_region_info[index].cap_offset);
 
     return 0;
 }
@@ -416,6 +421,9 @@ static int qemu_vfio_init_pci(QEMUVFIOState *s, const char 
*device,
         ret = -errno;
         goto fail;
     }
+    trace_qemu_vfio_region_info("config", s->config_region_info.offset,
+                                s->config_region_info.size,
+                                s->config_region_info.cap_offset);
 
     for (i = 0; i < ARRAY_SIZE(s->bar_region_info); i++) {
         ret = qemu_vfio_pci_init_bar(s, i, errp);
diff --git a/util/trace-events b/util/trace-events
index 8d3615e717..0753e4a0ed 100644
--- a/util/trace-events
+++ b/util/trace-events
@@ -87,3 +87,4 @@ qemu_vfio_dma_map(void *s, void *host, size_t size, bool 
temporary, uint64_t *io
 qemu_vfio_dma_unmap(void *s, void *host) "s %p host %p"
 qemu_vfio_pci_read_config(void *buf, int ofs, int size, uint64_t region_ofs, 
uint64_t region_size) "read cfg ptr %p ofs 0x%x size 0x%x (region addr 
0x%"PRIx64" size 0x%"PRIx64")"
 qemu_vfio_pci_write_config(void *buf, int ofs, int size, uint64_t region_ofs, 
uint64_t region_size) "write cfg ptr %p ofs 0x%x size 0x%x (region addr 
0x%"PRIx64" size 0x%"PRIx64")"
+qemu_vfio_region_info(const char *desc, uint64_t region_ofs, uint64_t 
region_size, uint32_t cap_offset) "region '%s' addr 0x%"PRIx64" size 
0x%"PRIx64" cap_ofs 0x%"PRIx32
-- 
2.28.0