gpu: nvgpu: add guest_managed field in vm_gk20a

Add a field in vm_gk20a to identify guest managed VM, with the
corresponding checks to ensure that there's no kernel section for
guest managed VMs.
Also make the __nvgpu_vm_init function available globally, so that
the vm can be allocated elsewhere, requisite fields set, and passed
to the function to initialize the vm.

Change-Id: Iad841d1b8ff9c894fe9d350dc43d74247e9c5512
Signed-off-by: Sourab Gupta <sourabg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1617171
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/vm.h b/drivers/gpu/nvgpu/include/nvgpu/vm.h
index e091f181..1689444c 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/vm.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/vm.h
@@ -150,6 +150,7 @@ struct vm_gk20a {
 
         bool big_pages;   /* enable large page support */
         bool enable_ctag;
+        bool guest_managed; /* whether the vm addr space is managed by guest */
 
         u32 big_page_size;
 
@@ -284,6 +285,19 @@ int nvgpu_insert_mapped_buf(struct vm_gk20a *vm,
 void nvgpu_remove_mapped_buf(struct vm_gk20a *vm,
                              struct nvgpu_mapped_buf *mapped_buffer);
 
+/*
+ * Initialize a preallocated vm
+ */
+int __nvgpu_vm_init(struct mm_gk20a *mm,
+                           struct vm_gk20a *vm,
+                           u32 big_page_size,
+                           u64 low_hole,
+                           u64 kernel_reserved,
+                           u64 aperture_size,
+                           bool big_pages,
+                           bool userspace_managed,
+                           char *name);
+
 struct vm_gk20a *nvgpu_vm_init(struct gk20a *g,
                                u32 big_page_size,
                                u64 low_hole,