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Subject: [RFC PATCH kvmtool 01/15] virtio: synchronize virtio-iommu headers with Linux
Pull virtio-iommu header (initial proposal) from Linux. Also add
virtio_config.h because it defines VIRTIO_F_IOMMU_PLATFORM, which I'm
going to need soon, and it's not provided by my toolchain.
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
---
include/linux/virtio_config.h | 74 ++++++++++++++++++++++
include/linux/virtio_ids.h | 4 ++
include/linux/virtio_iommu.h | 142 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 220 insertions(+)
create mode 100644 include/linux/virtio_config.h
create mode 100644 include/linux/virtio_iommu.h
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
new file mode 100644
index 00000000..648b688f
--- /dev/null
+++ b/include/linux/virtio_config.h
@@ -0,0 +1,74 @@
+#ifndef _LINUX_VIRTIO_CONFIG_H
+#define _LINUX_VIRTIO_CONFIG_H
+/* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
+ * anyone can use the definitions to implement compatible drivers/servers.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of IBM nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE. */
+
+/* Virtio devices use a standardized configuration space to define their
+ * features and pass configuration information, but each implementation can
+ * store and access that space differently. */
+#include <linux/types.h>
+
+/* Status byte for guest to report progress, and synchronize features. */
+/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
+#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1
+/* We have found a driver for the device. */
+#define VIRTIO_CONFIG_S_DRIVER 2
+/* Driver has used its parts of the config, and is happy */
+#define VIRTIO_CONFIG_S_DRIVER_OK 4
+/* Driver has finished configuring features */
+#define VIRTIO_CONFIG_S_FEATURES_OK 8
+/* Device entered invalid state, driver must reset it */
+#define VIRTIO_CONFIG_S_NEEDS_RESET 0x40
+/* We've given up on this device. */
+#define VIRTIO_CONFIG_S_FAILED 0x80
+
+/* Some virtio feature bits (currently bits 28 through 32) are reserved for the
+ * transport being used (eg. virtio_ring), the rest are per-device feature
+ * bits. */
+#define VIRTIO_TRANSPORT_F_START 28
+#define VIRTIO_TRANSPORT_F_END 34
+
+#ifndef VIRTIO_CONFIG_NO_LEGACY
+/* Do we get callbacks when the ring is completely used, even if we've
+ * suppressed them? */
+#define VIRTIO_F_NOTIFY_ON_EMPTY 24
+
+/* Can the device handle any descriptor layout? */
+#define VIRTIO_F_ANY_LAYOUT 27
+#endif /* VIRTIO_CONFIG_NO_LEGACY */
+
+/* v1.0 compliant. */
+#define VIRTIO_F_VERSION_1 32
+
+/*
+ * If clear - device has the IOMMU bypass quirk feature.
+ * If set - use platform tools to detect the IOMMU.
+ *
+ * Note the reverse polarity (compared to most other features),
+ * this is for compatibility with legacy systems.
+ */
+#define VIRTIO_F_IOMMU_PLATFORM 33
+#endif /* _LINUX_VIRTIO_CONFIG_H */
diff --git a/include/linux/virtio_ids.h b/include/linux/virtio_ids.h
index 5f60aa4b..934ed3d3 100644
--- a/include/linux/virtio_ids.h
+++ b/include/linux/virtio_ids.h
@@ -39,6 +39,10 @@
#define VIRTIO_ID_9P 9 /* 9p virtio console */
#define VIRTIO_ID_RPROC_SERIAL 11 /* virtio remoteproc serial link */
#define VIRTIO_ID_CAIF 12 /* Virtio caif */
+#define VIRTIO_ID_GPU 16 /* virtio GPU */
#define VIRTIO_ID_INPUT 18 /* virtio input */
+#define VIRTIO_ID_VSOCK 19 /* virtio vsock transport */
+#define VIRTIO_ID_CRYPTO 20 /* virtio crypto */
+#define VIRTIO_ID_IOMMU 61216 /* virtio IOMMU (temporary) */
#endif /* _LINUX_VIRTIO_IDS_H */
diff --git a/include/linux/virtio_iommu.h b/include/linux/virtio_iommu.h
new file mode 100644
index 00000000..beb21d44
--- /dev/null
+++ b/include/linux/virtio_iommu.h
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2017 ARM Ltd.
+ *
+ * This header is BSD licensed so anyone can use the definitions
+ * to implement compatible drivers/servers:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of ARM Ltd. nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef _LINUX_VIRTIO_IOMMU_H
+#define _LINUX_VIRTIO_IOMMU_H
+
+/* Feature bits */
+#define VIRTIO_IOMMU_F_INPUT_RANGE 0
+#define VIRTIO_IOMMU_F_IOASID_BITS 1
+#define VIRTIO_IOMMU_F_MAP_UNMAP 2
+#define VIRTIO_IOMMU_F_BYPASS 3
+
+__attribute__((packed))
+struct virtio_iommu_config {
+ /* Supported page sizes */
+ __u64 page_sizes;
+ struct virtio_iommu_range {
+ __u64 start;
+ __u64 end;
+ } input_range;
+ __u8 ioasid_bits;
+};
+
+/* Request types */
+#define VIRTIO_IOMMU_T_ATTACH 0x01
+#define VIRTIO_IOMMU_T_DETACH 0x02
+#define VIRTIO_IOMMU_T_MAP 0x03
+#define VIRTIO_IOMMU_T_UNMAP 0x04
+
+/* Status types */
+#define VIRTIO_IOMMU_S_OK 0x00
+#define VIRTIO_IOMMU_S_IOERR 0x01
+#define VIRTIO_IOMMU_S_UNSUPP 0x02
+#define VIRTIO_IOMMU_S_DEVERR 0x03
+#define VIRTIO_IOMMU_S_INVAL 0x04
+#define VIRTIO_IOMMU_S_RANGE 0x05
+#define VIRTIO_IOMMU_S_NOENT 0x06
+#define VIRTIO_IOMMU_S_FAULT 0x07
+
+__attribute__((packed))
+struct virtio_iommu_req_head {
+ __u8 type;
+ __u8 reserved[3];
+};
+
+__attribute__((packed))
+struct virtio_iommu_req_tail {
+ __u8 status;
+ __u8 reserved[3];
+};
+
+__attribute__((packed))
+struct virtio_iommu_req_attach {
+ struct virtio_iommu_req_head head;
+
+ __le32 address_space;
+ __le32 device;
+ __le32 reserved;
+
+ struct virtio_iommu_req_tail tail;
+};
+
+__attribute__((packed))
+struct virtio_iommu_req_detach {
+ struct virtio_iommu_req_head head;
+
+ __le32 device;
+ __le32 reserved;
+
+ struct virtio_iommu_req_tail tail;
+};
+
+#define VIRTIO_IOMMU_MAP_F_READ (1 << 0)
+#define VIRTIO_IOMMU_MAP_F_WRITE (1 << 1)
+#define VIRTIO_IOMMU_MAP_F_EXEC (1 << 2)
+
+#define VIRTIO_IOMMU_MAP_F_MASK (VIRTIO_IOMMU_MAP_F_READ | \
+ VIRTIO_IOMMU_MAP_F_WRITE | \
+ VIRTIO_IOMMU_MAP_F_EXEC)
+
+__attribute__((packed))
+struct virtio_iommu_req_map {
+ struct virtio_iommu_req_head head;
+
+ __le32 address_space;
+ __le32 flags;
+ __le64 virt_addr;
+ __le64 phys_addr;
+ __le64 size;
+
+ struct virtio_iommu_req_tail tail;
+};
+
+__attribute__((packed))
+struct virtio_iommu_req_unmap {
+ struct virtio_iommu_req_head head;
+
+ __le32 address_space;
+ __le32 flags;
+ __le64 virt_addr;
+ __le64 size;
+
+ struct virtio_iommu_req_tail tail;
+};
+
+union virtio_iommu_req {
+ struct virtio_iommu_req_head head;
+
+ struct virtio_iommu_req_attach attach;
+ struct virtio_iommu_req_detach detach;
+ struct virtio_iommu_req_map map;
+ struct virtio_iommu_req_unmap unmap;
+};
+
+#endif
--
2.12.1
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