From: "K. Y. Srinivasan" <kys@microsoft.com>
To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com,
vkuznets@redhat.com, jasowang@redhat.com
Cc: Alex Ng <alexng@microsoft.com>, "K. Y. Srinivasan" <kys@microsoft.com>
Subject: [PATCH 09/28] Drivers: hv: balloon: Enable dynamic memory protocol negotiation with Windows 10 hosts
Date: Sat, 1 Aug 2015 16:08:13 -0700 [thread overview]
Message-ID: <1438470512-30205-9-git-send-email-kys@microsoft.com> (raw)
In-Reply-To: <1438470512-30205-1-git-send-email-kys@microsoft.com>
From: Alex Ng <alexng@microsoft.com>
Support Win10 protocol for Dynamic Memory. Thia patch allows guests on Win10 hosts
to hot-add memory even when dynamic memory is not enabled on the guest.
Signed-off-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
---
drivers/hv/hv_balloon.c | 26 ++++++++++++++++++++------
1 files changed, 20 insertions(+), 6 deletions(-)
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 8a725cd..b853b4b 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -62,11 +62,13 @@
enum {
DYNMEM_PROTOCOL_VERSION_1 = DYNMEM_MAKE_VERSION(0, 3),
DYNMEM_PROTOCOL_VERSION_2 = DYNMEM_MAKE_VERSION(1, 0),
+ DYNMEM_PROTOCOL_VERSION_3 = DYNMEM_MAKE_VERSION(2, 0),
DYNMEM_PROTOCOL_VERSION_WIN7 = DYNMEM_PROTOCOL_VERSION_1,
DYNMEM_PROTOCOL_VERSION_WIN8 = DYNMEM_PROTOCOL_VERSION_2,
+ DYNMEM_PROTOCOL_VERSION_WIN10 = DYNMEM_PROTOCOL_VERSION_3,
- DYNMEM_PROTOCOL_VERSION_CURRENT = DYNMEM_PROTOCOL_VERSION_WIN8
+ DYNMEM_PROTOCOL_VERSION_CURRENT = DYNMEM_PROTOCOL_VERSION_WIN10
};
@@ -1296,13 +1298,25 @@ static void version_resp(struct hv_dynmem_device *dm,
if (dm->next_version == 0)
goto version_error;
- dm->next_version = 0;
memset(&version_req, 0, sizeof(struct dm_version_request));
version_req.hdr.type = DM_VERSION_REQUEST;
version_req.hdr.size = sizeof(struct dm_version_request);
version_req.hdr.trans_id = atomic_inc_return(&trans_id);
- version_req.version.version = DYNMEM_PROTOCOL_VERSION_WIN7;
- version_req.is_last_attempt = 1;
+ version_req.version.version = dm->next_version;
+
+ /*
+ * Set the next version to try in case current version fails.
+ * Win7 protocol ought to be the last one to try.
+ */
+ switch (version_req.version.version) {
+ case DYNMEM_PROTOCOL_VERSION_WIN8:
+ dm->next_version = DYNMEM_PROTOCOL_VERSION_WIN7;
+ version_req.is_last_attempt = 0;
+ break;
+ default:
+ dm->next_version = 0;
+ version_req.is_last_attempt = 1;
+ }
ret = vmbus_sendpacket(dm->dev->channel, &version_req,
sizeof(struct dm_version_request),
@@ -1442,7 +1456,7 @@ static int balloon_probe(struct hv_device *dev,
dm_device.dev = dev;
dm_device.state = DM_INITIALIZING;
- dm_device.next_version = DYNMEM_PROTOCOL_VERSION_WIN7;
+ dm_device.next_version = DYNMEM_PROTOCOL_VERSION_WIN8;
init_completion(&dm_device.host_event);
init_completion(&dm_device.config_event);
INIT_LIST_HEAD(&dm_device.ha_region_list);
@@ -1474,7 +1488,7 @@ static int balloon_probe(struct hv_device *dev,
version_req.hdr.type = DM_VERSION_REQUEST;
version_req.hdr.size = sizeof(struct dm_version_request);
version_req.hdr.trans_id = atomic_inc_return(&trans_id);
- version_req.version.version = DYNMEM_PROTOCOL_VERSION_WIN8;
+ version_req.version.version = DYNMEM_PROTOCOL_VERSION_WIN10;
version_req.is_last_attempt = 0;
ret = vmbus_sendpacket(dev->channel, &version_req,
--
1.7.4.1
next prev parent reply other threads:[~2015-08-01 21:49 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-01 23:08 [PATCH 00/28] Drivers: hv: vmbus K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 01/28] Drivers: hv: vmbus: remove hv_synic_free_cpu() call from hv_synic_cleanup() K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 02/28] kexec: define kexec_in_progress in !CONFIG_KEXEC case K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 03/28] Drivers: hv: vmbus: add special kexec handler K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 04/28] Drivers: hv: don't do hypercalls when hypercall_page is NULL K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 05/28] Drivers: hv: vmbus: add special crash handler K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 06/28] Drivers: hv: vmbus: prefer 'die' notification chain to 'panic' K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 07/28] Drivers: hv: kvp: check kzalloc return value K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 08/28] Drivers: hv: fcopy: dynamically allocate smsg_out in fcopy_send_data() K. Y. Srinivasan
2015-08-01 23:08 ` K. Y. Srinivasan [this message]
2015-08-01 23:08 ` [PATCH 10/28] Drivers: hv: vmbus: Permit sending of packets without payload K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 11/28] drivers:hv: Modify hv_vmbus to search for all MMIO ranges available K. Y. Srinivasan
2015-08-05 5:29 ` Greg KH
2015-08-05 5:59 ` KY Srinivasan
2015-08-01 23:08 ` [PATCH 12/28] drivers:hv: Move MMIO range picking from hyper_fb to hv_vmbus K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 13/28] hv: util: checking the wrong variable K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 14/28] Drivers: hv: vmbus: fix typo in hv_port_info struct K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 15/28] Drivers: hv: vmbus: don't send CHANNELMSG_UNLOAD on pre-Win2012R2 hosts K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 16/28] mshyperv: fix recognition of Hyper-V guest crash MSR's K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 17/28] Drivers: hv: vmbus: Consider ND NIC in binding channels to CPUs K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 18/28] Drivers: hv: vmbus: Improve the CPU affiliation for channels K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 19/28] Drivers: hv: vmbus: Further improve CPU affiliation logic K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 20/28] Drivers: hv_vmbus: Fix signal to host condition K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 21/28] drivers/hv: Migrate to new 'set-state' interface K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 22/28] Drivers: hv: vmbus: Implement a clocksource based on the TSC page K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 23/28] Drivers: hv: vmbus: add a sysfs attr to show the binding of channel/VP K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 24/28] tools: hv: add a python script lsvmbus to list VMBus devices K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 25/28] Drivers: hv: vmbus: document the VMBus sysfs files K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 26/28] cpu-hotplug: convert cpu_hotplug_disabled to a counter K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 27/28] cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable K. Y. Srinivasan
2015-08-01 23:08 ` [PATCH 28/28] Drivers: hv: vmbus: use cpu_hotplug_enable/disable K. Y. Srinivasan
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