user/sven/linux.git/include/linux/virtio_config.h, branch v3.2.31

virtio-pci: make reset operation safer

2011-11-24T02:34:48Z

virtio pci device reset actually just does an I/O write, which in PCI is really posted, that is it can complete on CPU before the device has received it. Further, interrupts might have been pending on another CPU, so device callback might get invoked after reset. This conflicts with how drivers use reset, which is typically: reset unregister a callback running after reset completed can race with unregister, potentially leading to use after free bugs. Fix by flushing out the write, and flushing pending interrupts. This assumes that device is never reset from its vq/config callbacks, or in parallel with being added/removed, document this assumption. Signed-off-by: Michael S. Tsirkin Signed-off-by: Rusty Russell

virtio_config: Add virtio_config_val_len()

2011-11-02T01:10:58Z

This patch adds virtio_config_val_len() which allows retrieving variable length data from the virtio config space only if a specific feature is on. Cc: Amit Shah Cc: "Michael S. Tsirkin" Cc: Rusty Russell Cc: virtualization@lists.linux-foundation.org Signed-off-by: Sasha Levin Signed-off-by: Rusty Russell

virtio: add full three-clause BSD text to headers.

2011-05-30T01:44:14Z

It's unclear to me if it's important, but it's obviously causing my technical colleages some headaches and I'd hate such imprecision to slow virtio adoption. I've emailed this to all non-trivial contributors for approval, too. Signed-off-by: Rusty Russell Acked-by: Grant Likely Acked-by: Ryan Harper Acked-by: Anthony Liguori Acked-by: Eric Van Hensbergen Acked-by: john cooper Acked-by: Aneesh Kumar K.V Acked-by: Christian Borntraeger Acked-by: Fernando Luis Vazquez Cao

Remove MAYBE_BUILD_BUG_ON

2011-01-24T04:15:11Z

Now BUILD_BUG_ON() can handle optimizable constants, we don't need MAYBE_BUILD_BUG_ON any more. Signed-off-by: Rusty Russell

BUILD_BUG_ON(): fix it and a couple of bogus uses of it

2009-09-23T14:39:29Z

gcc permitting variable length arrays makes the current construct used for BUILD_BUG_ON() useless, as that doesn't produce any diagnostic if the controlling expression isn't really constant. Instead, this patch makes it so that a bit field gets used here. Consequently, those uses where the condition isn't really constant now also need fixing. Note that in the gfp.h, kmemcheck.h, and virtio_config.h cases MAYBE_BUILD_BUG_ON() really just serves documentation purposes - even if the expression is compile time constant (__builtin_constant_p() yields true), the array is still deemed of variable length by gcc, and hence the whole expression doesn't have the intended effect. [akpm@linux-foundation.org: make arch/sparc/include/asm/vio.h compile] [akpm@linux-foundation.org: more nonsensical assertions in tpm.c..] Signed-off-by: Jan Beulich Cc: Andi Kleen Cc: Rusty Russell Cc: Catalin Marinas Cc: "David S. Miller" Cc: Rajiv Andrade Cc: Mimi Zohar Cc: James Morris Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lguest and virtio: cleanup struct definitions to Linux style.

2009-07-30T06:33:46Z

I've been doing this for years, and akpm picked me up on it about 12 months ago. lguest partly serves as example code, so let's do it Right. Also, remove two unused fields in struct vblk_info in the example launcher. Signed-off-by: Rusty Russell Cc: Ingo Molnar

virtio: teach virtio_has_feature() about transport features

2009-06-12T12:46:38Z

Drivers don't add transport features to their table, so we shouldn't check these with virtio_check_driver_offered_feature(). We could perhaps add an ->offered_feature() virtio_config_op, but that perhaps that would be overkill for a consitency check like this. Signed-off-by: Mark McLoughlin Signed-off-by: Rusty Russell

virtio: find_vqs/del_vqs virtio operations

2009-06-12T12:46:36Z

This replaces find_vq/del_vq with find_vqs/del_vqs virtio operations, and updates all drivers. This is needed for MSI support, because MSI needs to know the total number of vectors upfront. Signed-off-by: Michael S. Tsirkin Signed-off-by: Rusty Russell (+ lguest/9p compile fixes)

virtio: add names to virtqueue struct, mapping from devices to queues.

2009-06-12T12:46:36Z

Add a linked list of all virtqueues for a virtio device: this helps for debugging and is also needed for upcoming interface change. Also, add a "name" field for clearer debug messages. Signed-off-by: Rusty Russell

virtio: Rename set_features to finalize_features

2008-07-25T02:06:12Z

Rather than explicitly handing the features to the lower-level, we just hand the virtio_device and have it set the features. This make it clear that it has the chance to manipulate the features of the device at this point (and that all feature negotiation is already done). Signed-off-by: Rusty Russell