Merge tag 'for-linus-6.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - two small cleanup patches

 - a fix for PCI passthrough under Xen

 - a four patch series speeding up virtio under Xen with user space
   backends

* tag 'for-linus-6.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen-pciback: Consider INTx disabled when MSI/MSI-X is enabled
  xen: privcmd: Add support for ioeventfd
  xen: evtchn: Allow shared registration of IRQ handers
  xen: irqfd: Use _IOW instead of the internal _IOC() macro
  xen: Make struct privcmd_irqfd's layout architecture independent
  xen/xenbus: Add __counted_by for struct read_buffer and use struct_size()
  xenbus: fix error exit in xenbus_init()

2 files changed, 71 insertions, 2 deletions

diff --git a/include/uapi/xen/privcmd.h b/include/uapi/xen/privcmd.h
index 375718ba4ab620..8b8c5d1420fe4d 100644
--- a/include/uapi/xen/privcmd.h
+++ b/include/uapi/xen/privcmd.h
@@ -102,7 +102,7 @@ struct privcmd_mmap_resource {
 #define PRIVCMD_IRQFD_FLAG_DEASSIGN (1 << 0)
 
 struct privcmd_irqfd {
-	void __user *dm_op;
+	__u64 dm_op;
 	__u32 size; /* Size of structure pointed by dm_op */
 	__u32 fd;
 	__u32 flags;
@@ -110,6 +110,22 @@ struct privcmd_irqfd {
 	__u8 pad[2];
 };
 
+/* For privcmd_ioeventfd::flags */
+#define PRIVCMD_IOEVENTFD_FLAG_DEASSIGN (1 << 0)
+
+struct privcmd_ioeventfd {
+	__u64 ioreq;
+	__u64 ports;
+	__u64 addr;
+	__u32 addr_len;
+	__u32 event_fd;
+	__u32 vcpus;
+	__u32 vq;
+	__u32 flags;
+	domid_t dom;
+	__u8 pad[2];
+};
+
 /*
  * @cmd: IOCTL_PRIVCMD_HYPERCALL
  * @arg: &privcmd_hypercall_t
@@ -138,6 +154,8 @@ struct privcmd_irqfd {
 #define IOCTL_PRIVCMD_MMAP_RESOURCE				\
 	_IOC(_IOC_NONE, 'P', 7, sizeof(struct privcmd_mmap_resource))
 #define IOCTL_PRIVCMD_IRQFD					\
-	_IOC(_IOC_NONE, 'P', 8, sizeof(struct privcmd_irqfd))
+	_IOW('P', 8, struct privcmd_irqfd)
+#define IOCTL_PRIVCMD_IOEVENTFD					\
+	_IOW('P', 9, struct privcmd_ioeventfd)
 
 #endif /* __LINUX_PUBLIC_PRIVCMD_H__ */
diff --git a/include/xen/interface/hvm/ioreq.h b/include/xen/interface/hvm/ioreq.h
new file mode 100644
index 00000000000000..b02cfeae7eb5a8
--- /dev/null
+++ b/include/xen/interface/hvm/ioreq.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * ioreq.h: I/O request definitions for device models
+ * Copyright (c) 2004, Intel Corporation.
+ */
+
+#ifndef __XEN_PUBLIC_HVM_IOREQ_H__
+#define __XEN_PUBLIC_HVM_IOREQ_H__
+
+#define IOREQ_READ      1
+#define IOREQ_WRITE     0
+
+#define STATE_IOREQ_NONE        0
+#define STATE_IOREQ_READY       1
+#define STATE_IOREQ_INPROCESS   2
+#define STATE_IORESP_READY      3
+
+#define IOREQ_TYPE_PIO          0 /* pio */
+#define IOREQ_TYPE_COPY         1 /* mmio ops */
+#define IOREQ_TYPE_PCI_CONFIG   2
+#define IOREQ_TYPE_TIMEOFFSET   7
+#define IOREQ_TYPE_INVALIDATE   8 /* mapcache */
+
+/*
+ * VMExit dispatcher should cooperate with instruction decoder to
+ * prepare this structure and notify service OS and DM by sending
+ * virq.
+ *
+ * For I/O type IOREQ_TYPE_PCI_CONFIG, the physical address is formatted
+ * as follows:
+ *
+ * 63....48|47..40|39..35|34..32|31........0
+ * SEGMENT |BUS   |DEV   |FN    |OFFSET
+ */
+struct ioreq {
+	uint64_t addr;          /* physical address */
+	uint64_t data;          /* data (or paddr of data) */
+	uint32_t count;         /* for rep prefixes */
+	uint32_t size;          /* size in bytes */
+	uint32_t vp_eport;      /* evtchn for notifications to/from device model */
+	uint16_t _pad0;
+	uint8_t state:4;
+	uint8_t data_is_ptr:1;  /* if 1, data above is the guest paddr
+				 * of the real data to use. */
+	uint8_t dir:1;          /* 1=read, 0=write */
+	uint8_t df:1;
+	uint8_t _pad1:1;
+	uint8_t type;           /* I/O type */
+};
+
+#endif /* __XEN_PUBLIC_HVM_IOREQ_H__ */