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5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
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11 * The above copyright notice and this permission notice (including the next
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18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Eddie Dong <eddie.dong@intel.com>
26 * Jike Song <jike.song@intel.com>
29 * Zhi Wang <zhi.a.wang@intel.com>
37 * DOC: Hypervisor Service APIs for GVT-g Core Logic
39 * This is the glue layer between specific hypervisor MPT modules and GVT-g core
40 * logic. Each kind of hypervisor MPT module provides a collection of function
41 * callbacks and will be attached to GVT host when the driver is loading.
42 * GVT-g core logic will call these APIs to request specific services from
47 * intel_gvt_hypervisor_host_init - init GVT-g host side
50 * Zero on success, negative error code if failed
52 static inline int intel_gvt_hypervisor_host_init(struct device *dev,
53 void *gvt, const void *ops)
55 /* optional to provide */
56 if (!intel_gvt_host.mpt->host_init)
59 return intel_gvt_host.mpt->host_init(dev, gvt, ops);
63 * intel_gvt_hypervisor_host_exit - exit GVT-g host side
65 static inline void intel_gvt_hypervisor_host_exit(struct device *dev,
68 /* optional to provide */
69 if (!intel_gvt_host.mpt->host_exit)
72 intel_gvt_host.mpt->host_exit(dev, gvt);
76 * intel_gvt_hypervisor_attach_vgpu - call hypervisor to initialize vGPU
77 * related stuffs inside hypervisor.
80 * Zero on success, negative error code if failed.
82 static inline int intel_gvt_hypervisor_attach_vgpu(struct intel_vgpu *vgpu)
84 /* optional to provide */
85 if (!intel_gvt_host.mpt->attach_vgpu)
88 return intel_gvt_host.mpt->attach_vgpu(vgpu, &vgpu->handle);
92 * intel_gvt_hypervisor_detach_vgpu - call hypervisor to release vGPU
93 * related stuffs inside hypervisor.
96 * Zero on success, negative error code if failed.
98 static inline void intel_gvt_hypervisor_detach_vgpu(struct intel_vgpu *vgpu)
100 /* optional to provide */
101 if (!intel_gvt_host.mpt->detach_vgpu)
104 intel_gvt_host.mpt->detach_vgpu(vgpu->handle);
107 #define MSI_CAP_CONTROL(offset) (offset + 2)
108 #define MSI_CAP_ADDRESS(offset) (offset + 4)
109 #define MSI_CAP_DATA(offset) (offset + 8)
110 #define MSI_CAP_EN 0x1
113 * intel_gvt_hypervisor_inject_msi - inject a MSI interrupt into vGPU
116 * Zero on success, negative error code if failed.
118 static inline int intel_gvt_hypervisor_inject_msi(struct intel_vgpu *vgpu)
120 unsigned long offset = vgpu->gvt->device_info.msi_cap_offset;
125 control = *(u16 *)(vgpu_cfg_space(vgpu) + MSI_CAP_CONTROL(offset));
126 addr = *(u32 *)(vgpu_cfg_space(vgpu) + MSI_CAP_ADDRESS(offset));
127 data = *(u16 *)(vgpu_cfg_space(vgpu) + MSI_CAP_DATA(offset));
129 /* Do not generate MSI if MSIEN is disable */
130 if (!(control & MSI_CAP_EN))
133 if (WARN(control & GENMASK(15, 1), "only support one MSI format\n"))
136 trace_inject_msi(vgpu->id, addr, data);
138 ret = intel_gvt_host.mpt->inject_msi(vgpu->handle, addr, data);
145 * intel_gvt_hypervisor_set_wp_page - translate a host VA into MFN
146 * @p: host kernel virtual address
149 * MFN on success, INTEL_GVT_INVALID_ADDR if failed.
151 static inline unsigned long intel_gvt_hypervisor_virt_to_mfn(void *p)
153 return intel_gvt_host.mpt->from_virt_to_mfn(p);
157 * intel_gvt_hypervisor_enable_page_track - track a guest page
159 * @t: page track data structure
162 * Zero on success, negative error code if failed.
164 static inline int intel_gvt_hypervisor_enable_page_track(
165 struct intel_vgpu *vgpu,
166 struct intel_vgpu_page_track *t)
173 ret = intel_gvt_host.mpt->enable_page_track(vgpu->handle, t->gfn);
177 atomic_inc(&vgpu->gtt.n_tracked_guest_page);
182 * intel_gvt_hypervisor_disable_page_track - untrack a guest page
184 * @t: page track data structure
187 * Zero on success, negative error code if failed.
189 static inline int intel_gvt_hypervisor_disable_page_track(
190 struct intel_vgpu *vgpu,
191 struct intel_vgpu_page_track *t)
198 ret = intel_gvt_host.mpt->disable_page_track(vgpu->handle, t->gfn);
202 atomic_dec(&vgpu->gtt.n_tracked_guest_page);
207 * intel_gvt_hypervisor_read_gpa - copy data from GPA to host data buffer
209 * @gpa: guest physical address
210 * @buf: host data buffer
214 * Zero on success, negative error code if failed.
216 static inline int intel_gvt_hypervisor_read_gpa(struct intel_vgpu *vgpu,
217 unsigned long gpa, void *buf, unsigned long len)
219 return intel_gvt_host.mpt->read_gpa(vgpu->handle, gpa, buf, len);
223 * intel_gvt_hypervisor_write_gpa - copy data from host data buffer to GPA
225 * @gpa: guest physical address
226 * @buf: host data buffer
230 * Zero on success, negative error code if failed.
232 static inline int intel_gvt_hypervisor_write_gpa(struct intel_vgpu *vgpu,
233 unsigned long gpa, void *buf, unsigned long len)
235 return intel_gvt_host.mpt->write_gpa(vgpu->handle, gpa, buf, len);
239 * intel_gvt_hypervisor_gfn_to_mfn - translate a GFN to MFN
244 * MFN on success, INTEL_GVT_INVALID_ADDR if failed.
246 static inline unsigned long intel_gvt_hypervisor_gfn_to_mfn(
247 struct intel_vgpu *vgpu, unsigned long gfn)
249 return intel_gvt_host.mpt->gfn_to_mfn(vgpu->handle, gfn);
253 * intel_gvt_hypervisor_map_gfn_to_mfn - map a GFN region to MFN
257 * @nr: amount of PFNs
261 * Zero on success, negative error code if failed.
263 static inline int intel_gvt_hypervisor_map_gfn_to_mfn(
264 struct intel_vgpu *vgpu, unsigned long gfn,
265 unsigned long mfn, unsigned int nr,
268 /* a MPT implementation could have MMIO mapped elsewhere */
269 if (!intel_gvt_host.mpt->map_gfn_to_mfn)
272 return intel_gvt_host.mpt->map_gfn_to_mfn(vgpu->handle, gfn, mfn, nr,
277 * intel_gvt_hypervisor_set_trap_area - Trap a guest PA region
279 * @start: the beginning of the guest physical address region
280 * @end: the end of the guest physical address region
284 * Zero on success, negative error code if failed.
286 static inline int intel_gvt_hypervisor_set_trap_area(
287 struct intel_vgpu *vgpu, u64 start, u64 end, bool map)
289 /* a MPT implementation could have MMIO trapped elsewhere */
290 if (!intel_gvt_host.mpt->set_trap_area)
293 return intel_gvt_host.mpt->set_trap_area(vgpu->handle, start, end, map);
297 * intel_gvt_hypervisor_set_opregion - Set opregion for guest
301 * Zero on success, negative error code if failed.
303 static inline int intel_gvt_hypervisor_set_opregion(struct intel_vgpu *vgpu)
305 if (!intel_gvt_host.mpt->set_opregion)
308 return intel_gvt_host.mpt->set_opregion(vgpu);
312 * intel_gvt_hypervisor_get_vfio_device - increase vfio device ref count
316 * Zero on success, negative error code if failed.
318 static inline int intel_gvt_hypervisor_get_vfio_device(struct intel_vgpu *vgpu)
320 if (!intel_gvt_host.mpt->get_vfio_device)
323 return intel_gvt_host.mpt->get_vfio_device(vgpu);
327 * intel_gvt_hypervisor_put_vfio_device - decrease vfio device ref count
331 * Zero on success, negative error code if failed.
333 static inline void intel_gvt_hypervisor_put_vfio_device(struct intel_vgpu *vgpu)
335 if (!intel_gvt_host.mpt->put_vfio_device)
338 intel_gvt_host.mpt->put_vfio_device(vgpu);
342 * intel_gvt_hypervisor_is_valid_gfn - check if a visible gfn
347 * true on valid gfn, false on not.
349 static inline bool intel_gvt_hypervisor_is_valid_gfn(
350 struct intel_vgpu *vgpu, unsigned long gfn)
352 if (!intel_gvt_host.mpt->is_valid_gfn)
355 return intel_gvt_host.mpt->is_valid_gfn(vgpu->handle, gfn);
358 #endif /* _GVT_MPT_H_ */