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Merge branch 'virtio-shm' into for-next

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Pull virtio shared memory region patches for virtiofs shared memory
(DAX) support.
This commit is contained in:
Miklos Szeredi 2020-09-10 11:34:14 +02:00
commit 27bd6129a4
5 changed files with 164 additions and 1 deletions
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11
include/uapi/linux/virtio_mmio.h
View file

@ -122,6 +122,17 @@
#define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0
#define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4
/* Shared memory region id */
#define VIRTIO_MMIO_SHM_SEL 0x0ac
/* Shared memory region length, 64 bits in two halves */
#define VIRTIO_MMIO_SHM_LEN_LOW 0x0b0
#define VIRTIO_MMIO_SHM_LEN_HIGH 0x0b4
/* Shared memory region base address, 64 bits in two halves */
#define VIRTIO_MMIO_SHM_BASE_LOW 0x0b8
#define VIRTIO_MMIO_SHM_BASE_HIGH 0x0bc
/* Configuration atomicity value */
#define VIRTIO_MMIO_CONFIG_GENERATION 0x0fc

11
include/uapi/linux/virtio_pci.h
View file

@ -113,6 +113,8 @@
#define VIRTIO_PCI_CAP_DEVICE_CFG 4
/* PCI configuration access */
#define VIRTIO_PCI_CAP_PCI_CFG 5
/* Additional shared memory capability */
#define VIRTIO_PCI_CAP_SHARED_MEMORY_CFG 8
/* This is the PCI capability header: */
struct virtio_pci_cap {
@ -121,11 +123,18 @@ struct virtio_pci_cap {
__u8 cap_len; /* Generic PCI field: capability length */
__u8 cfg_type; /* Identifies the structure. */
__u8 bar; /* Where to find it. */
__u8 padding[3]; /* Pad to full dword. */
__u8 id; /* Multiple capabilities of the same type */
__u8 padding[2]; /* Pad to full dword. */
__le32 offset; /* Offset within bar. */
__le32 length; /* Length of the structure, in bytes. */
};
struct virtio_pci_cap64 {
struct virtio_pci_cap cap;
__le32 offset_hi; /* Most sig 32 bits of offset */
__le32 length_hi; /* Most sig 32 bits of length */
};
struct virtio_pci_notify_cap {
struct virtio_pci_cap cap;
__le32 notify_off_multiplier; /* Multiplier for queue_notify_off. */