nvdimm acpi: check revision

Currently only revision 1 is supported

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
index 07c95c1f1f..8b89285587 100644
--- a/hw/acpi/nvdimm.c
+++ b/hw/acpi/nvdimm.c
@@ -485,6 +485,13 @@ nvdimm_dsm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
     nvdimm_debug("Revision %#x Handler %#x Function %#x.\n", in->revision,
                  in->handle, in->function);
 
+    if (in->revision != 0x1 /* Currently we only support DSM Spec Rev1. */) {
+        nvdimm_debug("Revision %#x is not supported, expect %#x.\n",
+                     in->revision, 0x1);
+        nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr);
+        goto exit;
+    }
+
      /* Handle 0 is reserved for NVDIMM Root Device. */
     if (!in->handle) {
         nvdimm_dsm_root(in, dsm_mem_addr);