diff options
Diffstat (limited to 'util/vfio-helpers.c')
| -rw-r--r-- | util/vfio-helpers.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c index c469beb061..2bec48e163 100644 --- a/util/vfio-helpers.c +++ b/util/vfio-helpers.c @@ -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); } |