github/linuxkit
1
0
Fork 0
mirror of https://github.com/linuxkit/linuxkit.git synced 2026-01-04 22:41:58 +00:00
Code Issues Projects Releases Wiki Activity
Files
a772c2b7d61baef534d527a3b000fad14a4ba323
linuxkit/alpine/kernel/patches/0021-Drivers-hv-vmbus-Add-vendor-and-device-atttributes.patch
Rolf Neugebauer 61b38236a9 kernel: cherry-pick more VMBus patches, fix for yet another kernel crash 
These are most of the changes to channel.c and channel_mgmt.c from upstream.

They are needed to apply a proposed patch to fix yet another kernel crash
we reported. This patch is also included.

With these patches applied many thousand connections with random data and up
to 10 concurrent connections are sustained without kernel crashes.

This patch also updates the core Hyper-V socket support to v11 (which
also obsoletes the previous patch added to work around a kernel bug)

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
2016-05-17 11:06:07 +01:00

356 lines
8.7 KiB
Diff
Raw Blame History

From cd2ba91482cea0e0979336c7e174224c39ab4537 Mon Sep 17 00:00:00 2001
From: "K. Y. Srinivasan" <kys@microsoft.com>
Date: Fri, 25 Dec 2015 20:00:30 -0800
Subject: [PATCH 21/40] Drivers: hv: vmbus: Add vendor and device atttributes
Add vendor and device attributes to VMBUS devices. These will be used
by Hyper-V tools as well user-level RDMA libraries that will use the
vendor/device tuple to discover the RDMA device.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 7047f17d70fc0599563d30d0791692cb5fe42ae6)
---
Documentation/ABI/stable/sysfs-bus-vmbus | 14 +++
drivers/hv/channel_mgmt.c | 166 +++++++++++++++++++++++--------
drivers/hv/vmbus_drv.c | 21 ++++
include/linux/hyperv.h | 28 ++++++
4 files changed, 186 insertions(+), 43 deletions(-)
diff --git a/Documentation/ABI/stable/sysfs-bus-vmbus b/Documentation/ABI/stable/sysfs-bus-vmbus
index 636e938..5d0125f 100644
--- a/Documentation/ABI/stable/sysfs-bus-vmbus
+++ b/Documentation/ABI/stable/sysfs-bus-vmbus
@@ -27,3 +27,17 @@ Description: The mapping of which primary/sub channels are bound to which
Virtual Processors.
Format: <channel's child_relid:the bound cpu's number>
Users: tools/hv/lsvmbus
+
+What: /sys/bus/vmbus/devices/vmbus_*/device
+Date: Dec. 2015
+KernelVersion: 4.5
+Contact: K. Y. Srinivasan <kys@microsoft.com>
+Description: The 16 bit device ID of the device
+Users: tools/hv/lsvmbus and user level RDMA libraries
+
+What: /sys/bus/vmbus/devices/vmbus_*/vendor
+Date: Dec. 2015
+KernelVersion: 4.5
+Contact: K. Y. Srinivasan <kys@microsoft.com>
+Description: The 16 bit vendor ID of the device
+Users: tools/hv/lsvmbus and user level RDMA libraries
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 1c1ad47..107d72f 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -32,8 +32,122 @@
#include "hyperv_vmbus.h"
-static void init_vp_index(struct vmbus_channel *channel,
- const uuid_le *type_guid);
+static void init_vp_index(struct vmbus_channel *channel, u16 dev_type);
+
+static const struct vmbus_device vmbus_devs[] = {
+ /* IDE */
+ { .dev_type = HV_IDE,
+ HV_IDE_GUID,
+ .perf_device = true,
+ },
+
+ /* SCSI */
+ { .dev_type = HV_SCSI,
+ HV_SCSI_GUID,
+ .perf_device = true,
+ },
+
+ /* Fibre Channel */
+ { .dev_type = HV_FC,
+ HV_SYNTHFC_GUID,
+ .perf_device = true,
+ },
+
+ /* Synthetic NIC */
+ { .dev_type = HV_NIC,
+ HV_NIC_GUID,
+ .perf_device = true,
+ },
+
+ /* Network Direct */
+ { .dev_type = HV_ND,
+ HV_ND_GUID,
+ .perf_device = true,
+ },
+
+ /* PCIE */
+ { .dev_type = HV_PCIE,
+ HV_PCIE_GUID,
+ .perf_device = true,
+ },
+
+ /* Synthetic Frame Buffer */
+ { .dev_type = HV_FB,
+ HV_SYNTHVID_GUID,
+ .perf_device = false,
+ },
+
+ /* Synthetic Keyboard */
+ { .dev_type = HV_KBD,
+ HV_KBD_GUID,
+ .perf_device = false,
+ },
+
+ /* Synthetic MOUSE */
+ { .dev_type = HV_MOUSE,
+ HV_MOUSE_GUID,
+ .perf_device = false,
+ },
+
+ /* KVP */
+ { .dev_type = HV_KVP,
+ HV_KVP_GUID,
+ .perf_device = false,
+ },
+
+ /* Time Synch */
+ { .dev_type = HV_TS,
+ HV_TS_GUID,
+ .perf_device = false,
+ },
+
+ /* Heartbeat */
+ { .dev_type = HV_HB,
+ HV_HEART_BEAT_GUID,
+ .perf_device = false,
+ },
+
+ /* Shutdown */
+ { .dev_type = HV_SHUTDOWN,
+ HV_SHUTDOWN_GUID,
+ .perf_device = false,
+ },
+
+ /* File copy */
+ { .dev_type = HV_FCOPY,
+ HV_FCOPY_GUID,
+ .perf_device = false,
+ },
+
+ /* Backup */
+ { .dev_type = HV_BACKUP,
+ HV_VSS_GUID,
+ .perf_device = false,
+ },
+
+ /* Dynamic Memory */
+ { .dev_type = HV_DM,
+ HV_DM_GUID,
+ .perf_device = false,
+ },
+
+ /* Unknown GUID */
+ { .dev_type = HV_UNKOWN,
+ .perf_device = false,
+ },
+};
+
+static u16 hv_get_dev_type(const uuid_le *guid)
+{
+ u16 i;
+
+ for (i = HV_IDE; i < HV_UNKOWN; i++) {
+ if (!uuid_le_cmp(*guid, vmbus_devs[i].guid))
+ return i;
+ }
+ pr_info("Unknown GUID: %pUl\n", guid);
+ return i;
+}
/**
* vmbus_prep_negotiate_resp() - Create default response for Hyper-V Negotiate message
@@ -251,6 +365,7 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
struct vmbus_channel *channel;
bool fnew = true;
unsigned long flags;
+ u16 dev_type;
/* Make sure this is a new offer */
mutex_lock(&vmbus_connection.channel_mutex);
@@ -288,7 +403,9 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
goto err_free_chan;
}
- init_vp_index(newchannel, &newchannel->offermsg.offer.if_type);
+ dev_type = hv_get_dev_type(&newchannel->offermsg.offer.if_type);
+
+ init_vp_index(newchannel, dev_type);
if (newchannel->target_cpu != get_cpu()) {
put_cpu();
@@ -325,6 +442,7 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
if (!newchannel->device_obj)
goto err_deq_chan;
+ newchannel->device_obj->device_id = dev_type;
/*
* Add the new device to the bus. This will kick off device-driver
* binding which eventually invokes the device driver's AddDevice()
@@ -358,37 +476,6 @@ err_free_chan:
free_channel(newchannel);
}
-enum {
- IDE = 0,
- SCSI,
- FC,
- NIC,
- ND_NIC,
- PCIE,
- MAX_PERF_CHN,
-};
-
-/*
- * This is an array of device_ids (device types) that are performance critical.
- * We attempt to distribute the interrupt load for these devices across
- * all available CPUs.
- */
-static const struct hv_vmbus_device_id hp_devs[] = {
- /* IDE */
- { HV_IDE_GUID, },
- /* Storage - SCSI */
- { HV_SCSI_GUID, },
- /* Storage - FC */
- { HV_SYNTHFC_GUID, },
- /* Network */
- { HV_NIC_GUID, },
- /* NetworkDirect Guest RDMA */
- { HV_ND_GUID, },
- /* PCI Express Pass Through */
- { HV_PCIE_GUID, },
-};
-
-
/*
* We use this state to statically distribute the channel interrupt load.
*/
@@ -405,22 +492,15 @@ static int next_numa_node_id;
* For pre-win8 hosts or non-performance critical channels we assign the
* first CPU in the first NUMA node.
*/
-static void init_vp_index(struct vmbus_channel *channel, const uuid_le *type_guid)
+static void init_vp_index(struct vmbus_channel *channel, u16 dev_type)
{
u32 cur_cpu;
- int i;
- bool perf_chn = false;
+ bool perf_chn = vmbus_devs[dev_type].perf_device;
struct vmbus_channel *primary = channel->primary_channel;
int next_node;
struct cpumask available_mask;
struct cpumask *alloced_mask;
- for (i = IDE; i < MAX_PERF_CHN; i++) {
- if (!uuid_le_cmp(*type_guid, hp_devs[i].guid)) {
- perf_chn = true;
- break;
- }
- }
if ((vmbus_proto_version == VERSION_WS2008) ||
(vmbus_proto_version == VERSION_WIN7) || (!perf_chn)) {
/*
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 5a71b2a..3b83dfe 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -478,6 +478,24 @@ static ssize_t channel_vp_mapping_show(struct device *dev,
}
static DEVICE_ATTR_RO(channel_vp_mapping);
+static ssize_t vendor_show(struct device *dev,
+ struct device_attribute *dev_attr,
+ char *buf)
+{
+ struct hv_device *hv_dev = device_to_hv_device(dev);
+ return sprintf(buf, "0x%x\n", hv_dev->vendor_id);
+}
+static DEVICE_ATTR_RO(vendor);
+
+static ssize_t device_show(struct device *dev,
+ struct device_attribute *dev_attr,
+ char *buf)
+{
+ struct hv_device *hv_dev = device_to_hv_device(dev);
+ return sprintf(buf, "0x%x\n", hv_dev->device_id);
+}
+static DEVICE_ATTR_RO(device);
+
/* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
static struct attribute *vmbus_attrs[] = {
&dev_attr_id.attr,
@@ -503,6 +521,8 @@ static struct attribute *vmbus_attrs[] = {
&dev_attr_in_read_bytes_avail.attr,
&dev_attr_in_write_bytes_avail.attr,
&dev_attr_channel_vp_mapping.attr,
+ &dev_attr_vendor.attr,
+ &dev_attr_device.attr,
NULL,
};
ATTRIBUTE_GROUPS(vmbus);
@@ -957,6 +977,7 @@ struct hv_device *vmbus_device_create(const uuid_le *type,
memcpy(&child_device_obj->dev_type, type, sizeof(uuid_le));
memcpy(&child_device_obj->dev_instance, instance,
sizeof(uuid_le));
+ child_device_obj->vendor_id = 0x1414; /* MSFT vendor ID */
return child_device_obj;
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 9e2de6a..51c98fd 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -635,6 +635,32 @@ enum hv_signal_policy {
HV_SIGNAL_POLICY_EXPLICIT,
};
+enum vmbus_device_type {
+ HV_IDE = 0,
+ HV_SCSI,
+ HV_FC,
+ HV_NIC,
+ HV_ND,
+ HV_PCIE,
+ HV_FB,
+ HV_KBD,
+ HV_MOUSE,
+ HV_KVP,
+ HV_TS,
+ HV_HB,
+ HV_SHUTDOWN,
+ HV_FCOPY,
+ HV_BACKUP,
+ HV_DM,
+ HV_UNKOWN,
+};
+
+struct vmbus_device {
+ u16 dev_type;
+ uuid_le guid;
+ bool perf_device;
+};
+
struct vmbus_channel {
/* Unique channel id */
int id;
@@ -961,6 +987,8 @@ struct hv_device {
/* the device instance id of this device */
uuid_le dev_instance;
+ u16 vendor_id;
+ u16 device_id;
struct device device;
--
2.8.2
Reference in New Issue View Git Blame Copy Permalink