debug lk

hc

2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077

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