- 02 3月, 2015 2 次提交
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由 Vitaly Kuznetsov 提交于
Newly introduced clockevent devices made it impossible to unload hv_vmbus module as clockevents_config_and_register() takes additional reverence to the module. To make it possible again we do the following: - avoid setting dev->owner for clockevent devices; - implement hv_synic_clockevents_cleanup() doing clockevents_unbind_device(); - call it from vmbus_exit(). In theory hv_synic_clockevents_cleanup() can be merged with hv_synic_cleanup(), however, we call hv_synic_cleanup() from smp_call_function_single() and this doesn't work for clockevents_unbind_device() as it does such call on its own. I opted for a separate function. Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Vitaly Kuznetsov 提交于
SynIC has to be switched off when we unload the module, otherwise registered memory pages can get corrupted after (as Hyper-V host still writes there) and we see the following crashes for random processes: [ 89.116774] BUG: Bad page map in process sh pte:4989c716 pmd:36f81067 [ 89.159454] addr:0000000000437000 vm_flags:00000875 anon_vma: (null) mapping:ffff88007bba55a0 index:37 [ 89.226146] vma->vm_ops->fault: filemap_fault+0x0/0x410 [ 89.257776] vma->vm_file->f_op->mmap: generic_file_mmap+0x0/0x60 [ 89.297570] CPU: 0 PID: 215 Comm: sh Tainted: G B 3.19.0-rc5_bug923184+ #488 [ 89.353738] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090006 05/23/2012 [ 89.409138] 0000000000000000 000000004e083d7b ffff880036e9fa18 ffffffff81a68d31 [ 89.468724] 0000000000000000 0000000000437000 ffff880036e9fa68 ffffffff811a1e3a [ 89.519233] 000000004989c716 0000000000000037 ffffea0001edc340 0000000000437000 [ 89.575751] Call Trace: [ 89.591060] [<ffffffff81a68d31>] dump_stack+0x45/0x57 [ 89.625164] [<ffffffff811a1e3a>] print_bad_pte+0x1aa/0x250 [ 89.667234] [<ffffffff811a2c95>] vm_normal_page+0x55/0xa0 [ 89.703818] [<ffffffff811a3105>] unmap_page_range+0x425/0x8a0 [ 89.737982] [<ffffffff811a3601>] unmap_single_vma+0x81/0xf0 [ 89.780385] [<ffffffff81184320>] ? lru_deactivate_fn+0x190/0x190 [ 89.820130] [<ffffffff811a4131>] unmap_vmas+0x51/0xa0 [ 89.860168] [<ffffffff811ad12c>] exit_mmap+0xac/0x1a0 [ 89.890588] [<ffffffff810763c3>] mmput+0x63/0x100 [ 89.919205] [<ffffffff811eba48>] flush_old_exec+0x3f8/0x8b0 [ 89.962135] [<ffffffff8123b5bb>] load_elf_binary+0x32b/0x1260 [ 89.998581] [<ffffffff811a14f2>] ? get_user_pages+0x52/0x60 hv_synic_cleanup() function exists but noone calls it now. Do the following: - call hv_synic_cleanup() on each cpu from vmbus_exit(); - write global disable bit through MSR; - use hv_synic_free_cpu() to avoid memory leask and code duplication. Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 26 1月, 2015 1 次提交
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由 K. Y. Srinivasan 提交于
Implement a clockevent device based on the timer support available on Hyper-V. In this version of the patch I have addressed Jason's review comments. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 24 9月, 2014 1 次提交
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由 K. Y. Srinivasan 提交于
Minimize failures in this function by pre-allocating the buffer for posting messages. The hypercall for posting the message can fail for a number of reasons: 1. Transient resource related issues 2. Buffer alignment 3. Buffer cannot span a page boundry We address issues 2 and 3 by preallocating a per-cpu page for the buffer. Transient resource related failures are handled by retrying by the callers of this function. This patch is based on the investigation done by Dexuan Cui <decui@microsoft.com>. I would like to thank Sitsofe Wheeler <sitsofe@yahoo.com> for reporting the issue and helping in debuggging. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reported-by: NSitsofe Wheeler <sitsofe@yahoo.com> Cc: <stable@vger.kernel.org> Tested-by: NSitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 04 5月, 2014 1 次提交
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由 K. Y. Srinivasan 提交于
Currently the mapping of the relID to channel is done under the protection of a single spin lock. Starting with ws2012, each channel is bound to a specific VCPU in the guest. Use this binding to eliminate the spin lock by setting up per-cpu state for mapping relId to the channel. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 19 12月, 2013 1 次提交
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由 Rashika Kheria 提交于
This patch marks the function hv_synic_free_cpu() as static in hv.c because it is not used outside this file. Thus, it also eliminates the following warning in hv.c: drivers/hv/hv.c:304:6: warning: no previous prototype for ‘hv_synic_free_cpu’ [-Wmissing-prototypes] Signed-off-by: NRashika Kheria <rashika.kheria@gmail.com> Reviewed-by: NJosh Triplett <josh@joshtriplett.org> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 17 10月, 2013 1 次提交
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由 Felipe Pena 提交于
The check for calling free_page() on hv_context.synic_event_page[cpu] is the same for hv_context.synic_message_page[cpu], like a copy-paste error. Signed-off-by: NFelipe Pena <felipensp@gmail.com> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 25 6月, 2013 1 次提交
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由 Jason Wang 提交于
We currently allocate synic structures in hv_sync_init(), but there's no way for the driver to know about the allocation failure and it may continue to use the uninitialized pointers. Solve this by introducing helpers for allocating and freeing and doing the allocation before the on_each_cpu() call in vmbus_bus_init(). Cc: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 18 3月, 2013 1 次提交
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由 Zhang Yanfei 提交于
remove cast for kmalloc return value. Signed-off-by: NZhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: devel@linuxdriverproject.org Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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- 16 3月, 2013 1 次提交
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由 Zhang Yanfei 提交于
remove cast for kmalloc return value. Signed-off-by: NZhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 28 2月, 2013 1 次提交
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由 K. Y. Srinivasan 提交于
Use the infrastructure for delivering VMBUS interrupts using a special vector. With this patch, we can now properly handle the VMBUS interrupts that can be delivered on any CPU. Also, turn on interrupt load balancing as well. This patch requires the infrastructure that was implemented in the patch: X86: Handle Hyper-V vmbus interrupts as special hypervisor interrupts Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 18 1月, 2013 7 次提交
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由 K. Y. Srinivasan 提交于
Now, cleanup and consolidate reporting of host and vmbus version numbers. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
Capture the host build information so it can be presented along with the negotiated vmbus version information. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
Vmbus interrupts are unique in that while the interrupt is delivered on a given vector, these can be handled concurrently on different CPUs. Handle the vmbus interrupts concurrently on all the CPUs. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
Now that we can potentially take vmbus interrupts on any CPU, make the tasklets per-CPU. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
Now that we have implemented a per-connection signaling mechanism, get rid of the global signaling state. For hosts that don't support per-connection signaling handle, we have moved the global state to be a per-channel state. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
On win8 (ws2012), incoming vmbus interrupt load can be spread across all available VCPUs in the guest. On a per-channel basis, the interrupts can be bound to specific CPUs. The Linux notion of cpu ID may be different from that of the hypervisor's. Setup a mapping structure. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 K. Y. Srinivasan 提交于
In preparation for implementing a per-connection signaling framework, change the signature of the function hv_signal_event(). The current code uses a global handle for signaling the host. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 18 8月, 2012 1 次提交
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由 Jason Wang 提交于
We wait for about 5 seconds for the success of the hyperv registration even if we were not in hyperv platform. This is suboptimal, so the patch check the cpuid in the beginning of hv_acpi_init() instead of in vmbus_bus_init() to fail the probing immediately. Signed-off-by: NJason Wang <jasowang@redhat.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Acked-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 14 8月, 2012 1 次提交
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由 K. Y. Srinivasan 提交于
The current guest ID string in use in vmbus driver does not conform to the MSFT guidelines on guest ID. MSFT currently does not specify Linux specific guidelines. MSFT however has plans to publish Linux specific guidelines. This implementation conforms to the yet unpublished Linux specific guidelines for guest ID. This implementation also broadly conforms to the current guidelines as well. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com> Cc: Bjørn Mork <bjorn@mork.no> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 10 4月, 2012 1 次提交
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由 Dan Carpenter 提交于
This function returns negative error codes, but because the type is u16 they get truncated into positive numbers. It doesn't look like the callers care, but we should fix it anyway as a cleanup. Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 10 2月, 2012 1 次提交
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由 K. Y. Srinivasan 提交于
The current code arbirarily limited the number of CPUs the guest could have. Change that so that we can support the maximum number of CPUs the guest can support. While we use NR_CPUS to size the per-cpu state all we are allocating based on NR_CPUS are the pointers to per-cpu state that will be allocatted in the context of the initializing CPU. This patch triggers a checkpatch warning for the usage of NR_CPU and since all we are allocating a couple of pointers per CPU, it should be ok. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 13 12月, 2011 2 次提交
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由 K. Y. Srinivasan 提交于
In preparation for eventually supporting kexec in Linux VMs on Hyper-V, get rid of an unnecessary check in hv_init(). Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 K. Y. Srinivasan 提交于
It turns out that the vmbus driver can be made unloadable. Make it unloadable. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 11 10月, 2011 2 次提交
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由 Greg Kroah-Hartman 提交于
No one outside of the hyperv core needs to include the asm/hyperv.h file, so don't put it in the "global" include/linux/hyperv.h file. Cc: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Greg Kroah-Hartman 提交于
After many years wandering the desert, it is finally time for the Microsoft HyperV code to move out of the staging directory. Or at least the core hyperv bus code, and the utility driver, the rest still have some review to get through by the various subsystem maintainers. Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
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- 30 8月, 2011 1 次提交
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由 K. Y. Srinivasan 提交于
Linux interrupt handling code generates the eoi; don't enable auto eoi. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 26 8月, 2011 2 次提交
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由 K. Y. Srinivasan 提交于
Use standard Linux error codes. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 K. Y. Srinivasan 提交于
Cleanup unnecessary comments in hv.c. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 24 8月, 2011 1 次提交
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由 K. Y. Srinivasan 提交于
Fix checkpatch warnings in hv.c Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 08 6月, 2011 1 次提交
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由 K. Y. Srinivasan 提交于
Cleanup error codes in hv.c. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 18 5月, 2011 5 次提交
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由 K. Y. Srinivasan 提交于
Move the contents of vmbus_private.h to vmbus_hyperv.h. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com> Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 K. Y. Srinivasan 提交于
Include the contents of hv_api.h in hyperv_vmbus.h. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com> Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 K. Y. Srinivasan 提交于
Create a common header file to build the vmbus driver. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com> Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 K. Y. Srinivasan 提交于
Move the contents of logging.h to hyperv.h. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com> Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 K. Y. Srinivasan 提交于
Include the newly created header file in all of the relevant hyperv files. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com> Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 12 5月, 2011 2 次提交
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由 K. Y. Srinivasan 提交于
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com> Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 K. Y. Srinivasan 提交于
Get rid of some commented code. Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com> Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 05 4月, 2011 2 次提交
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由 Hank Janssen 提交于
Replace all remaining DPRINT calls (excluding the ringbuffer debug which is going to be done in a next set of patches) with their native pr_ calls. And also changed some of the printouts to be more useful. Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Hank Janssen 提交于
Remove all un-needed DPRINT calls from hv_vmbus. Several are remaining that will be cleaned up in my next set of patches. They deal with printing out the ringbuffer debugging which is going to be implemented slightly differently. This patch deals with hv_vmbus only. Signed-off-by: NHank Janssen <hjanssen@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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