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virtio: Don't use PAGE_SIZE for vring alignment in virtio_pci.

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That doesn't work for non-4k guests which are now appearing.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2008-12-30 09:25:57 -06:00
parent 5f0d1d7f22
commit 498af14783
2 changed files with 6 additions and 2 deletions
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4
include/linux/virtio_pci.h
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@ -57,4 +57,8 @@
/* How many bits to shift physical queue address written to QUEUE_PFN.
* 12 is historical, and due to x86 page size. */
#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
/* The alignment to use between consumer and producer parts of vring.
* x86 pagesize again. */
#define VIRTIO_PCI_VRING_ALIGN 4096
#endif