@@ -1,6 +1,7 @@
#include "qemu/osdep.h"
#include "exec/ramlist.h"
#include "exec/cpu-common.h"
+#include "exec/memory.h"
void *qemu_ram_get_host_addr(RAMBlock *rb)
{
@@ -29,3 +30,8 @@ int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
{
return 0;
}
+
+int ram_block_discard_disable(bool state)
+{
+ return 0;
+}
@@ -16,6 +16,7 @@
#include "qapi/error.h"
#include "exec/ramlist.h"
#include "exec/cpu-common.h"
+#include "exec/memory.h"
#include "trace.h"
#include "qemu/error-report.h"
#include "standard-headers/linux/pci_regs.h"
@@ -494,8 +495,20 @@ QEMUVFIOState *qemu_vfio_open_pci(const char *device, Error **errp)
int r;
QEMUVFIOState *s = g_new0(QEMUVFIOState, 1);
+ /*
+ * VFIO may pin all memory inside mappings, resulting it in pinning
+ * all memory inside RAM blocks unconditionally.
+ */
+ r = ram_block_discard_disable(true);
+ if (r) {
+ error_setg_errno(errp, -r, "Cannot set discarding of RAM broken");
+ g_free(s);
+ return NULL;
+ }
+
r = qemu_vfio_init_pci(s, device, errp);
if (r) {
+ ram_block_discard_disable(false);
g_free(s);
return NULL;
}
@@ -837,4 +850,5 @@ void qemu_vfio_close(QEMUVFIOState *s)
close(s->device);
close(s->group);
close(s->container);
+ ram_block_discard_disable(false);
}