From 0f98829a99850836cf7c2cc9fbf1d7ce0f795780 Mon Sep 17 00:00:00 2001 From: Dexuan Cui Date: Wed, 7 Sep 2016 05:39:34 -0700 Subject: [PATCH 1/1] Drivers: hv: vmbus: suppress some "hv_vmbus: Unknown GUID" warnings Some VMBus devices are not needed by Linux guest[1][2], and, VMBus channels of Hyper-V Sockets don't really mean usual synthetic devices, so let's suppress the warnings for them. [1] https://support.microsoft.com/en-us/kb/2925727 [2] https://msdn.microsoft.com/en-us/library/jj980180(v=winembedded.81).aspx Signed-off-by: Dexuan Cui Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/channel_mgmt.c | 26 ++++++++++++++++++++++++-- include/linux/hyperv.h | 21 +++++++++++++++++++++ 2 files changed, 45 insertions(+), 2 deletions(-) diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index bbd812e87511..759ba4d62417 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -139,10 +139,32 @@ static const struct vmbus_device vmbus_devs[] = { }, }; -static u16 hv_get_dev_type(const uuid_le *guid) +static const struct { + uuid_le guid; +} vmbus_unsupported_devs[] = { + { HV_AVMA1_GUID }, + { HV_AVMA2_GUID }, + { HV_RDV_GUID }, +}; + +static bool is_unsupported_vmbus_devs(const uuid_le *guid) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(vmbus_unsupported_devs); i++) + if (!uuid_le_cmp(*guid, vmbus_unsupported_devs[i].guid)) + return true; + return false; +} + +static u16 hv_get_dev_type(const struct vmbus_channel *channel) { + const uuid_le *guid = &channel->offermsg.offer.if_type; u16 i; + if (is_hvsock_channel(channel) || is_unsupported_vmbus_devs(guid)) + return HV_UNKOWN; + for (i = HV_IDE; i < HV_UNKOWN; i++) { if (!uuid_le_cmp(*guid, vmbus_devs[i].guid)) return i; @@ -426,7 +448,7 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel) goto err_free_chan; } - dev_type = hv_get_dev_type(&newchannel->offermsg.offer.if_type); + dev_type = hv_get_dev_type(newchannel); if (dev_type == HV_NIC) set_channel_signal_state(newchannel, HV_SIGNAL_POLICY_EXPLICIT); diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 613074ef1ce9..430619a92d3b 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1314,6 +1314,27 @@ u64 hv_do_hypercall(u64 control, void *input, void *output); .guid = UUID_LE(0x44c4f61d, 0x4444, 0x4400, 0x9d, 0x52, \ 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f) +/* + * Linux doesn't support the 3 devices: the first two are for + * Automatic Virtual Machine Activation, and the third is for + * Remote Desktop Virtualization. + * {f8e65716-3cb3-4a06-9a60-1889c5cccab5} + * {3375baf4-9e15-4b30-b765-67acb10d607b} + * {276aacf4-ac15-426c-98dd-7521ad3f01fe} + */ + +#define HV_AVMA1_GUID \ + .guid = UUID_LE(0xf8e65716, 0x3cb3, 0x4a06, 0x9a, 0x60, \ + 0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5) + +#define HV_AVMA2_GUID \ + .guid = UUID_LE(0x3375baf4, 0x9e15, 0x4b30, 0xb7, 0x65, \ + 0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b) + +#define HV_RDV_GUID \ + .guid = UUID_LE(0x276aacf4, 0xac15, 0x426c, 0x98, 0xdd, \ + 0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe) + /* * Common header for Hyper-V ICs */ -- 2.20.1