Re: [PATCH v3 22/32] nvdimm: init the address region used by NVDIMM ACPI

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On 10/19/2015 06:25 PM, Michael S. Tsirkin wrote:
On Mon, Oct 19, 2015 at 11:18:36AM +0200, Igor Mammedov wrote:
On Mon, 19 Oct 2015 09:56:12 +0300
"Michael S. Tsirkin" <mst@xxxxxxxxxx> wrote:

On Sun, Oct 11, 2015 at 11:52:54AM +0800, Xiao Guangrong wrote:
[...]
diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h
index f6bd2c4..aa95961 100644
--- a/include/hw/mem/nvdimm.h
+++ b/include/hw/mem/nvdimm.h
@@ -15,6 +15,10 @@

  #include "hw/mem/dimm.h"

+/* Memory region 0xFF00000 ~ 0xFFF00000 is reserved for NVDIMM
ACPI. */ +#define NVDIMM_ACPI_MEM_BASE   0xFF000000ULL
Michael,

If it's ok to map control RAM region directly from QEMU at arbitrary
location

It's a fair question. Where is it reserved? In which spec?


The region 0xFF00000 ~ 0xFFF00000 is just reserved for vDSM implementation,
it is not required by spec.

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