NVMe: Initial commit for new storage interface

Initial commit for emulated Non-Volatile-Memory Express (NVMe) pci
storage device.

NVMe is an open, industry driven storage specification defining
an optimized register and command set designed to deliver the full
capabilities of non-volatile memory on PCIe SSDs. Further information
may be found on the organizations website at:

http://www.nvmexpress.org/

This commit implements the minimum from the specification to work with
existing drivers.

Cc: Keith Busch <keith.busch@gmail.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

MAINTAINERS

@@ -609,6 +609,11 @@ S: Supported
 F: hw/char/virtio-serial-bus.c
 F: hw/char/virtio-console.c
 
+nvme
+M: Keith Busch <keith.busch@intel.com>
+S: Supported
+F: hw/block/nvme*
+
 Xilinx EDK
 M: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
 M: Edgar E. Iglesias <edgar.iglesias@gmail.com>

default-configs/pci.mak

@@ -29,3 +29,4 @@ CONFIG_SERIAL_PCI=y
 CONFIG_IPACK=y
 CONFIG_WDT_IB6300ESB=y
 CONFIG_PCI_TESTDEV=y
+CONFIG_NVME_PCI=y

hw/block/Makefile.objs

@@ -8,6 +8,7 @@ common-obj-$(CONFIG_XEN_BACKEND) += xen_disk.o
 common-obj-$(CONFIG_ECC) += ecc.o
 common-obj-$(CONFIG_ONENAND) += onenand.o
 common-obj-$(CONFIG_PC_SYSFW) += pc_sysfw.o
+common-obj-$(CONFIG_NVME_PCI) += nvme.o
 
 obj-$(CONFIG_SH4) += tc58128.o
 

include/hw/pci/pci_ids.h

@@ -19,6 +19,7 @@
 #define PCI_CLASS_STORAGE_IDE            0x0101
 #define PCI_CLASS_STORAGE_RAID           0x0104
 #define PCI_CLASS_STORAGE_SATA           0x0106
+#define PCI_CLASS_STORAGE_EXPRESS        0x0108
 #define PCI_CLASS_STORAGE_OTHER          0x0180
 
 #define PCI_CLASS_NETWORK_ETHERNET       0x0200