Systems and methods for adaptive access of memory namespaces

1. An information handling system, comprising:

a memory subsystem; and

a processor subsystem communicatively coupled to the memory subsystem and configured to execute a hypervisor, wherein the hypervisor is configured to host a plurality of virtual machines and host an interface to the memory subsystem, wherein the interface is configured to:

maintain a data structure for mapping at least one namespace instantiated within the memory subsystem to a plurality of access modes for accessing the at least one namespace from the processor subsystem, wherein the plurality of access modes are selected from the group consisting of: a raw mode, a block mode, a sector mode, and a DAX mode;

responsive to receiving a request from a boot service for input/output (I/O) relating to a particular namespace created with an initial access mode, wherein the boot service is associated with a second access mode and wherein the initial access mode and the second access mode differ, provide a mapping between the second access mode and the initial access mode to enable the boot service to access the particular namespace; and

responsive to receiving a request from a runtime service for I/O relating to the particular namespace created with an initial access mode, wherein the runtime service is associated with a third access mode and wherein the initial access mode and the third access mode differ, provide a mapping between the third access mode and the initial access mode to enable the runtime service to access the particular namespace.

2. The information handling system of claim 1 , wherein the memory subsystem comprises persistent memory modules.

3. The information handling system of claim 2 , wherein the persistent memory modules comprise non-volatile dual-inline memory modules (NVDIMMs).

4. The information handling system of claim 3 , wherein the data structure is stored in an NVDIMM Firmware Interface Table.

5. A method comprising:

hosting on a hypervisor a plurality of virtual machines;

hosting on the hypervisor an interface between a processor subsystem upon which the hypervisor executes and a memory subsystem communicatively coupled to the processor subsystem, wherein the interface is configured to maintain a data structure for mapping at least one namespace instantiated within the memory subsystem to a plurality of access modes for accessing the at least one namespace from the processor subsystem, wherein the plurality of access modes are selected from the group consisting of: a raw mode, a block mode, a sector mode, and a DAX mode;

responsive to receiving a request from a boot service for input/output (I/O) relating to a particular namespace created with an initial access mode, wherein the boot service is associated with a second access mode and wherein the initial access mode and the second access mode differ, providing a mapping between the second access mode and the initial access mode to enable the boot service to access the particular namespace; and

responsive to receiving a request from a runtime service for I/O relating to the particular namespace created with an initial access mode, wherein the runtime service is associated with a third access mode and wherein the initial access mode and the third access mode differ, providing a mapping between the third access mode and the initial access mode to enable the runtime service to access the particular namespace.

6. The method of claim 5 , wherein the memory subsystem comprises persistent memory modules.

7. The method of claim 6 , wherein the persistent memory modules comprise non-volatile dual-inline memory modules (NVDIMMs).

8. The method of claim 7 , wherein the data structure is stored as one or more entries in an NVDIMM Firmware Interface Table.

9. An article of manufacture comprising:

a non-transitory computer-readable medium; and

computer-executable instructions carried on the computer-readable medium, the instructions readable by a processor, the instructions, when read and executed, for causing the processor to:

host on a hypervisor a plurality of virtual machines;

host on the hypervisor an interface between a processor subsystem upon which the hypervisor executes and a memory subsystem communicatively coupled to the processor subsystem, wherein the interface is configured to maintain a data structure for mapping at least one namespace instantiated within the memory subsystem to a plurality of access modes for accessing the at least one namespace from the processor subsystem, wherein the plurality of access modes are selected from the group consisting of: a raw mode, a block mode, a sector mode, and a DAX mode;

responsive to receiving a request from a boot service for input/output (I/O) relating to a particular namespace created with an initial access mode, wherein the boot service is associated with a second access mode and wherein the initial access mode and the second access mode differ, provide a mapping between the second access mode and the initial access mode to enable the boot service to access the particular namespace; and

responsive to receiving a request from a runtime service for I/O relating to the particular namespace created with an initial access mode, wherein the runtime service is associated with a third access mode and wherein the initial access mode and the third access mode differ, provide a mapping between the third access mode and the initial access mode to enable the runtime service to access the particular namespace.

10. The article of claim 9 , wherein the memory subsystem comprises persistent memory modules.

11. The article of claim 10 , wherein the persistent memory modules comprise non-volatile dual-inline memory modules (NVDIMMs).

12. The article of claim 11 , wherein the data structure is stored as one or more entries in an NVDIMM Firmware Interface Table.