Merge remote-tracking branch 'sstabellini/tags/xen-20170516-tag' into staging

Xen 2017/05/16

# gpg: Signature made Tue 16 May 2017 08:18:32 PM BST
# gpg:                using RSA key 0x894F8F4870E1AE90
# gpg: Good signature from "Stefano Stabellini <stefano.stabellini@eu.citrix.com>"
# gpg:                 aka "Stefano Stabellini <sstabellini@kernel.org>"
# Primary key fingerprint: D04E 33AB A51F 67BA 07D3  0AEA 894F 8F48 70E1 AE90

* sstabellini/tags/xen-20170516-tag:
  xen: call qemu_set_cloexec instead of fcntl
  xen/9pfs: fix two resource leaks on error paths, discovered by Coverity
  configure: Remove -lxencall for Xen detection
  xen/mapcache: store dma information in revmapcache entries for debugging

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/hw/i386/xen/xen-mapcache.c b/hw/i386/xen/xen-mapcache.c
index 31debdfb2c..e60156c04f 100644
--- a/hw/i386/xen/xen-mapcache.c
+++ b/hw/i386/xen/xen-mapcache.c
@@ -62,6 +62,7 @@ typedef struct MapCacheRev {
     hwaddr paddr_index;
     hwaddr size;
     QTAILQ_ENTRY(MapCacheRev) next;
+    bool dma;
 } MapCacheRev;
 
 typedef struct MapCache {
@@ -202,7 +203,7 @@ static void xen_remap_bucket(MapCacheEntry *entry,
 }
 
 static uint8_t *xen_map_cache_unlocked(hwaddr phys_addr, hwaddr size,
-                                       uint8_t lock)
+                                       uint8_t lock, bool dma)
 {
     MapCacheEntry *entry, *pentry = NULL;
     hwaddr address_index;
@@ -289,6 +290,7 @@ tryagain:
     if (lock) {
         MapCacheRev *reventry = g_malloc0(sizeof(MapCacheRev));
         entry->lock++;
+        reventry->dma = dma;
         reventry->vaddr_req = mapcache->last_entry->vaddr_base + address_offset;
         reventry->paddr_index = mapcache->last_entry->paddr_index;
         reventry->size = entry->size;
@@ -300,12 +302,12 @@ tryagain:
 }
 
 uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
-                       uint8_t lock)
+                       uint8_t lock, bool dma)
 {
     uint8_t *p;
 
     mapcache_lock();
-    p = xen_map_cache_unlocked(phys_addr, size, lock);
+    p = xen_map_cache_unlocked(phys_addr, size, lock, dma);
     mapcache_unlock();
     return p;
 }
@@ -426,8 +428,11 @@ void xen_invalidate_map_cache(void)
     mapcache_lock();
 
     QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) {
-        DPRINTF("There should be no locked mappings at this time, "
-                "but "TARGET_FMT_plx" -> %p is present\n",
+        if (!reventry->dma) {
+            continue;
+        }
+        fprintf(stderr, "Locked DMA mapping while invalidating mapcache!"
+                " "TARGET_FMT_plx" -> %p is present\n",
                 reventry->paddr_index, reventry->vaddr_req);
     }