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| author | Shuo Liu <shuo.a.liu@intel.com> | 2021-02-07 06:10:38 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-09 12:58:19 +0300 |
| commit | aa3b483ff1d71c50b33db154048dff9a8f08ac71 (patch) | |
| tree | 898df00c9a24bd0c5485e9ec47fb74f115e7323a /drivers/virt/acrn/vm.c | |
| parent | d8ad515156b66e7e79a6e4c814f997ee54eb47c7 (diff) | |
| download | linux-aa3b483ff1d71c50b33db154048dff9a8f08ac71.tar.xz | |
virt: acrn: Introduce irqfd
irqfd is a mechanism to inject a specific interrupt to a User VM using a
decoupled eventfd mechanism.
Vhost is a kernel-level virtio server which uses eventfd for interrupt
injection. To support vhost on ACRN, irqfd is introduced in HSM.
HSM provides ioctls to associate a virtual Message Signaled Interrupt
(MSI) with an eventfd. The corresponding virtual MSI will be injected
into a User VM once the eventfd got signal.
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Yu Wang <yu1.wang@intel.com>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Link: https://lore.kernel.org/r/20210207031040.49576-17-shuo.a.liu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/virt/acrn/vm.c')
| -rw-r--r-- | drivers/virt/acrn/vm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/virt/acrn/vm.c b/drivers/virt/acrn/vm.c index 2b322d956a8c..7804a2492ad7 100644 --- a/drivers/virt/acrn/vm.c +++ b/drivers/virt/acrn/vm.c @@ -51,6 +51,7 @@ struct acrn_vm *acrn_vm_create(struct acrn_vm *vm, write_unlock_bh(&acrn_vm_list_lock); acrn_ioeventfd_init(vm); + acrn_irqfd_init(vm); dev_dbg(acrn_dev.this_device, "VM %u created.\n", vm->vmid); return vm; } @@ -69,7 +70,9 @@ int acrn_vm_destroy(struct acrn_vm *vm) write_unlock_bh(&acrn_vm_list_lock); acrn_ioeventfd_deinit(vm); + acrn_irqfd_deinit(vm); acrn_ioreq_deinit(vm); + if (vm->monitor_page) { put_page(vm->monitor_page); vm->monitor_page = NULL; |