linux-kernel - [PATCH v2 1/5] iommu/virtio: Add definitions for VIRTIO_IOMMU_F_BYPASS

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Date:   Tue, 23 Nov 2021 15:52:58 +0000
From:   Jean-Philippe Brucker <jean-philippe@...aro.org>
To:     joro@...tes.org, will@...nel.org, mst@...hat.com,
        jasowang@...hat.com
Cc:     virtualization@...ts.linux-foundation.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        eric.auger@...hat.com, sebastien.boeuf@...el.com,
        kevin.tian@...el.com, pasic@...ux.ibm.com,
        Jean-Philippe Brucker <jean-philippe@...aro.org>
Subject: [PATCH v2 1/5] iommu/virtio: Add definitions for VIRTIO_IOMMU_F_BYPASS_CONFIG

Add definitions for the VIRTIO_IOMMU_F_BYPASS_CONFIG, which supersedes
VIRTIO_IOMMU_F_BYPASS.

Reviewed-by: Kevin Tian <kevin.tian@...el.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@...aro.org>
---
 include/uapi/linux/virtio_iommu.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h
index 237e36a280cb..cafd8cf7febf 100644
--- a/include/uapi/linux/virtio_iommu.h
+++ b/include/uapi/linux/virtio_iommu.h
@@ -16,6 +16,7 @@
 #define VIRTIO_IOMMU_F_BYPASS			3
 #define VIRTIO_IOMMU_F_PROBE			4
 #define VIRTIO_IOMMU_F_MMIO			5
+#define VIRTIO_IOMMU_F_BYPASS_CONFIG		6
 
 struct virtio_iommu_range_64 {
 	__le64					start;
@@ -36,6 +37,8 @@ struct virtio_iommu_config {
 	struct virtio_iommu_range_32		domain_range;
 	/* Probe buffer size */
 	__le32					probe_size;
+	__u8					bypass;
+	__u8					reserved[7];
 };
 
 /* Request types */
@@ -66,11 +69,14 @@ struct virtio_iommu_req_tail {
 	__u8					reserved[3];
 };
 
+#define VIRTIO_IOMMU_ATTACH_F_BYPASS		(1 << 0)
+
 struct virtio_iommu_req_attach {
 	struct virtio_iommu_req_head		head;
 	__le32					domain;
 	__le32					endpoint;
-	__u8					reserved[8];
+	__le32					flags;
+	__u8					reserved[4];
 	struct virtio_iommu_req_tail		tail;
 };
 
-- 
2.33.1