diff options
| author | Saurabh Sengar <ssengar@linux.microsoft.com> | 2024-03-30 01:51:57 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-06 11:00:09 +0200 |
| commit | ebba6cc0781c00566ab7a11d9307cd093a787881 (patch) | |
| tree | 2e220df0050a1d5c2e6ff90c944ae11d332e5cfb /include/linux/hyperv.h | |
| parent | 3bc5abf8e75a3d2cce8e0a1bfe2e4cb38df1a93a (diff) | |
Drivers: hv: vmbus: Add utility function for querying ring size
[ Upstream commit e8c4bd6c6e6b7e7b416c42806981c2a81370001e ]
Add a function to query for the preferred ring buffer size of VMBus
device. This will allow the drivers (eg. UIO) to allocate the most
optimized ring buffer size for devices.
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
Link: https://lore.kernel.org/r/1711788723-8593-2-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 0315fef2aff9 ("uio_hv_generic: Align ring size to system page")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux/hyperv.h')
| -rw-r--r-- | include/linux/hyperv.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index b5bf5315ca8c..e4ad9760774e 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -820,6 +820,8 @@ struct vmbus_requestor { #define VMBUS_RQST_RESET (U64_MAX - 3) struct vmbus_device { + /* preferred ring buffer size in KB, 0 means no preferred size for this device */ + size_t pref_ring_size; u16 dev_type; guid_t guid; bool perf_device; |