The default number of vmbus channels (macro
MAX_NUM_CHANNELS_SUPPORTED_DEFAULT) is made configurable through the new
Kconfig option HYPERV_VMBUS_DEFAULT_CHANNELS.
Signed-off-by: Stefan Eschenbacher <stefan.eschenbac...@fau.de>
Co-developed-by: Max Stolze <max.sto...@fau.de>
Signed-off-by: Max Stolze <max.sto...@fau.de>
---
drivers/hv/Kconfig | 13 +++++++++++++
drivers/hv/hyperv_vmbus.h | 2 +-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 79e5356a737a..40bee5b05ccd 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -26,4 +26,17 @@ config HYPERV_BALLOON
help
Select this option to enable Hyper-V Balloon driver.
+config HYPERV_VMBUS_DEFAULT_CHANNELS
+ int "Default number of VMBus channels (as multiple of 32)"
+ range 0 512
+ default 8
+ depends on HYPERV
+ help
+ Specify the default number of VMBus channels here as nth multiple of
+ 32. The value must be equal to or less than 512.
+ The default is 8 meaning the number of channels is 8 * 32 = 256.
+ A different value can be set when loading the hv_vmbus module by
+ setting the parameter max_num_channels_supported directly to the
+ number of channels and not as a multiple of 32.
+
endmenu
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 52dcfa1c17ef..47af2c76ce57 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -194,7 +194,7 @@ int hv_ringbuffer_read(struct vmbus_channel *channel,
#define MAX_NUM_CHANNELS ((HV_HYP_PAGE_SIZE >> 1) << 3)
/* The value here must be in multiple of 32 */
-#define MAX_NUM_CHANNELS_SUPPORTED_DEFAULT 256
+#define MAX_NUM_CHANNELS_SUPPORTED_DEFAULT
(CONFIG_HYPERV_VMBUS_DEFAULT_CHANNELS * 32)
extern uint max_num_channels_supported;
#define MAX_CHANNEL_RELIDS \
--
2.20.1
