diff options
| author | Timo Völker <timo.voelker@fh-muenster.de> | 2026-04-04 14:49:54 +0000 |
|---|---|---|
| committer | Michael Tuexen <tuexen@FreeBSD.org> | 2026-04-04 14:49:54 +0000 |
| commit | 0b39d72d0491c77e3e9883015b1fac46663c71de (patch) | |
| tree | d70e82d4bd43db8de214d2e2e5faed546da3b330 | |
| parent | 39c44fc55f0ed595623fb6d66a4060b7be32fa51 (diff) | |
virtio: use modern mode for transitional device by default
This patch changes the default value of the loader tunable
hw.virtio.pci.transitional to 1. This means, virtio uses the
modern mode for transitional devices by default.
The return values of vtpci_modern_probe() and vtpci_legacy_probei()
were chosen to prefer modern mode, but hw.virtio.pci.transitional=0
prevents modern mode.
Setting hw.virtio.pci.transitional to 1 by default seems a better fit.
Reviewed by: tuexen
Differential Revision: https://reviews.freebsd.org/D55894
| -rw-r--r-- | share/man/man4/virtio.4 | 2 | ||||
| -rw-r--r-- | sys/dev/virtio/pci/virtio_pci_modern.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/share/man/man4/virtio.4 b/share/man/man4/virtio.4 index 8252cc1b7954..6af6300b1cee 100644 --- a/share/man/man4/virtio.4 +++ b/share/man/man4/virtio.4 @@ -114,7 +114,7 @@ use the legacy .Nm driver .Pq 0 . -The default value is 0. +The default value is 1. .El .Sh SEE ALSO .Xr virtio_balloon 4 , diff --git a/sys/dev/virtio/pci/virtio_pci_modern.c b/sys/dev/virtio/pci/virtio_pci_modern.c index 108fd2b5f8e9..baf7c448bb95 100644 --- a/sys/dev/virtio/pci/virtio_pci_modern.c +++ b/sys/dev/virtio/pci/virtio_pci_modern.c @@ -191,7 +191,7 @@ static void vtpci_modern_write_device_8(struct vtpci_modern_softc *, /* Tunables. */ SYSCTL_DECL(_hw_virtio_pci); -static int vtpci_modern_transitional = 0; +static int vtpci_modern_transitional = 1; SYSCTL_INT(_hw_virtio_pci, OID_AUTO, transitional, CTLFLAG_RDTUN, &vtpci_modern_transitional, 0, "If 0, a transitional VirtIO device is used in legacy mode; otherwise, in modern mode."); |