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hw/nvme: Add support for SR-IOV

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This patch implements initial support for Single Root I/O Virtualization
on an NVMe device.

Essentially, it allows to define the maximum number of virtual functions
supported by the NVMe controller via sriov_max_vfs parameter.

Passing a non-zero value to sriov_max_vfs triggers reporting of SR-IOV
capability by a physical controller and ARI capability by both the
physical and virtual function devices.

NVMe controllers created via virtual functions mirror functionally
the physical controller, which may not entirely be the case, thus
consideration would be needed on the way to limit the capabilities of
the VF.

NVMe subsystem is required for the use of SR-IOV.

Signed-off-by: Lukasz Maniak <lukasz.maniak@linux.intel.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
This commit is contained in:
Lukasz Maniak 2022-05-09 16:16:09 +02:00 • committed by Klaus Jensen
parent 7db86fe2ed
commit 44c2c09488
3 changed files with 85 additions and 4 deletions
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3
hw/nvme/nvme.h
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@ -24,7 +24,7 @@
#include "block/nvme.h"
#define NVME_MAX_CONTROLLERS 32
#define NVME_MAX_CONTROLLERS 256
#define NVME_MAX_NAMESPACES 256
#define NVME_EUI64_DEFAULT ((uint64_t)0x5254000000000000)
@ -406,6 +406,7 @@ typedef struct NvmeParams {
uint8_t zasl;
bool auto_transition_zones;
bool legacy_cmb;
uint8_t sriov_max_vfs;
} NvmeParams;
typedef struct NvmeCtrl {