[QEMU PATCH v2 3/6] acpi/nvdimm: NVDIMM _DSM Spec supports revision 2

[Robert Hoo <robert.hu@linux.intel.com>]

The Intel Optane PMem DSM Interface, Version 2.0 [1], is the up-to-date
spec for NVDIMM _DSM definition, which supports revision_id == 2.

Nevertheless, Rev.2 of NVDIMM _DSM has no functional change on those Label
Data _DSM Functions, which are the only ones implemented for vNVDIMM.
So, simple change to support this revision_id == 2 case.

[1] https://pmem.io/documents/IntelOptanePMem_DSM_Interface-V2.0.pdf

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Reviewed-by: Jingqi Liu <jingqi.liu@intel.com>
---
 hw/acpi/nvdimm.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
index 0ab247a870..59b42afcf1 100644
--- a/hw/acpi/nvdimm.c
+++ b/hw/acpi/nvdimm.c
@@ -849,9 +849,13 @@ nvdimm_dsm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
     nvdimm_debug("Revision 0x%x Handler 0x%x Function 0x%x.\n", in->revision,
                  in->handle, in->function);
 
-    if (in->revision != 0x1 /* Currently we only support DSM Spec Rev1. */) {
-        nvdimm_debug("Revision 0x%x is not supported, expect 0x%x.\n",
-                     in->revision, 0x1);
+    /*
+     * Current NVDIMM _DSM Spec supports Rev1 and Rev2
+     * Intel® OptanePersistent Memory Module DSM Interface, Revision 2.0
+     */
+    if (in->revision != 0x1 && in->revision != 0x2) {
+        nvdimm_debug("Revision 0x%x is not supported, expect 0x1 or 0x2.\n",
+                     in->revision);
         nvdimm_dsm_no_payload(NVDIMM_DSM_RET_STATUS_UNSUPPORT, dsm_mem_addr);
         goto exit;
     }
-- 
2.31.1