diff options
Diffstat (limited to 'OvmfPkg/Include')
| -rw-r--r-- | OvmfPkg/Include/IndustryStandard/VirtioBlk.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/OvmfPkg/Include/IndustryStandard/VirtioBlk.h b/OvmfPkg/Include/IndustryStandard/VirtioBlk.h index a9f91e4673..2ce528a12e 100644 --- a/OvmfPkg/Include/IndustryStandard/VirtioBlk.h +++ b/OvmfPkg/Include/IndustryStandard/VirtioBlk.h @@ -26,6 +26,13 @@ //
#pragma pack(1)
typedef struct {
+ UINT8 PhysicalBlockExp; // # of logical blocks per physical block (log2)
+ UINT8 AlignmentOffset; // offset of first aligned logical block
+ UINT16 MinIoSize; // suggested minimum I/O size in blocks
+ UINT32 OptIoSize; // optimal (suggested maximum) I/O size in blocks
+} VIRTIO_BLK_TOPOLOGY;
+
+typedef struct {
UINT64 Capacity;
UINT32 SizeMax;
UINT32 SegMax;
@@ -33,6 +40,7 @@ typedef struct { UINT8 Heads;
UINT8 Sectors;
UINT32 BlkSize;
+ VIRTIO_BLK_TOPOLOGY Topology;
} VIRTIO_BLK_CONFIG;
#pragma pack()
@@ -47,9 +55,11 @@ typedef struct { #define VIRTIO_BLK_F_BLK_SIZE BIT6 // treated as "logical block size" in
// practice; actual host side
// implementation negotiates "optimal"
- // block size separately
+ // block size separately, via
+ // VIRTIO_BLK_F_TOPOLOGY
#define VIRTIO_BLK_F_SCSI BIT7
#define VIRTIO_BLK_F_FLUSH BIT9 // identical to "write cache enabled"
+#define VIRTIO_BLK_F_TOPOLOGY BIT10 // information on optimal I/O alignment
//
// We keep the status byte separate from the rest of the virtio-blk request
|