Date: Wed, 23 Oct 2013 18:54:58 +0000 (UTC) From: Peter Grehan <grehan@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r257005 - head/usr.sbin/bhyve Message-ID: <201310231854.r9NIswRM000674@svn.freebsd.org>
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Author: grehan Date: Wed Oct 23 18:54:58 2013 New Revision: 257005 URL: http://svnweb.freebsd.org/changeset/base/257005 Log: Export the block size capability to guests. - Use #defines for capability bits - Export the VTBLK_F_BLK_SIZE capability - Fix bug in calculating capacity: it is in 512-byte units, not the underlying sector size This allows virtio-blk to have backing devices with non 512-byte sector sizes e.g. /dev/cd0, and 4K-block harddrives. Reviewed by: neel MFC after: 3 days Modified: head/usr.sbin/bhyve/pci_virtio_block.c Modified: head/usr.sbin/bhyve/pci_virtio_block.c ============================================================================== --- head/usr.sbin/bhyve/pci_virtio_block.c Wed Oct 23 18:36:05 2013 (r257004) +++ head/usr.sbin/bhyve/pci_virtio_block.c Wed Oct 23 18:54:58 2013 (r257005) @@ -66,11 +66,16 @@ __FBSDID("$FreeBSD$"); #define VTBLK_BLK_ID_BYTES 20 +/* Capability bits */ +#define VTBLK_F_SEG_MAX (1 << 2) /* Maximum request segments */ +#define VTBLK_F_BLK_SIZE (1 << 6) /* cfg block size valid */ + /* * Host capabilities */ #define VTBLK_S_HOSTCAPS \ - ( 0x00000004 | /* host maximum request segments */ \ + ( VTBLK_F_SEG_MAX | \ + VTBLK_F_BLK_SIZE | \ VIRTIO_RING_F_INDIRECT_DESC ) /* indirect descriptors */ /* @@ -315,7 +320,7 @@ pci_vtblk_init(struct vmctx *ctx, struct digest[0], digest[1], digest[2], digest[3], digest[4], digest[5]); /* setup virtio block config space */ - sc->vbsc_cfg.vbc_capacity = size / sectsz; + sc->vbsc_cfg.vbc_capacity = size / DEV_BSIZE; /* 512-byte units */ sc->vbsc_cfg.vbc_seg_max = VTBLK_MAXSEGS; sc->vbsc_cfg.vbc_blk_size = sectsz; sc->vbsc_cfg.vbc_size_max = 0; /* not negotiated */
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