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Commit 7b3343b7 authored by Jike Song's avatar Jike Song Committed by Zhenyu Wang
Browse files

drm/i915/gvt: allow several MPT methods to be NULL 



Hypervisors are different, the MPT ops is a only superset of
all possibly supported hypervisors. There might be other way
out of the MPT to achieve same target. e.g. vfio-based kvmgt
won't provide map_gfn_to_mfn method to establish guest EPT
mapping for aperture, since it will be done in QEMU/KVM, MMIO
is also trapped elsewhere, etc.

Signed-off-by: default avatarJike Song <jike.song@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 40df6ea0

drivers/gpu/drm/i915/gvt/mpt.h

+24 −0
Original line number Original line Diff line number Diff line
@@ -64,6 +64,10 @@ static inline int intel_gvt_hypervisor_detect_host(void) 
static inline int intel_gvt_hypervisor_host_init(struct device *dev,

static inline int intel_gvt_hypervisor_host_init(struct device *dev,

			void *gvt, const void *ops)

			void *gvt, const void *ops)

{

{

	/* optional to provide */

	if (!intel_gvt_host.mpt->host_init)

		return 0;



	return intel_gvt_host.mpt->host_init(dev, gvt, ops);

	return intel_gvt_host.mpt->host_init(dev, gvt, ops);

}

}
@@ -73,6 +77,10 @@ static inline int intel_gvt_hypervisor_host_init(struct device *dev, 
static inline void intel_gvt_hypervisor_host_exit(struct device *dev,

static inline void intel_gvt_hypervisor_host_exit(struct device *dev,

			void *gvt)

			void *gvt)

{

{

	/* optional to provide */

	if (!intel_gvt_host.mpt->host_exit)

		return;



	intel_gvt_host.mpt->host_exit(dev, gvt);

	intel_gvt_host.mpt->host_exit(dev, gvt);

}

}
@@ -85,6 +93,10 @@ static inline void intel_gvt_hypervisor_host_exit(struct device *dev, 
 */

 */

static inline int intel_gvt_hypervisor_attach_vgpu(struct intel_vgpu *vgpu)

static inline int intel_gvt_hypervisor_attach_vgpu(struct intel_vgpu *vgpu)

{

{

	/* optional to provide */

	if (!intel_gvt_host.mpt->attach_vgpu)

		return 0;



	return intel_gvt_host.mpt->attach_vgpu(vgpu, &vgpu->handle);

	return intel_gvt_host.mpt->attach_vgpu(vgpu, &vgpu->handle);

}

}
@@ -97,6 +109,10 @@ static inline int intel_gvt_hypervisor_attach_vgpu(struct intel_vgpu *vgpu) 
 */

 */

static inline void intel_gvt_hypervisor_detach_vgpu(struct intel_vgpu *vgpu)

static inline void intel_gvt_hypervisor_detach_vgpu(struct intel_vgpu *vgpu)

{

{

	/* optional to provide */

	if (!intel_gvt_host.mpt->detach_vgpu)

		return;



	intel_gvt_host.mpt->detach_vgpu(vgpu->handle);

	intel_gvt_host.mpt->detach_vgpu(vgpu->handle);

}

}
@@ -261,6 +277,10 @@ static inline int intel_gvt_hypervisor_map_gfn_to_mfn( 
		unsigned long mfn, unsigned int nr,

		unsigned long mfn, unsigned int nr,

		bool map)

		bool map)

{

{

	/* a MPT implementation could have MMIO mapped elsewhere */

	if (!intel_gvt_host.mpt->map_gfn_to_mfn)

		return 0;



	return intel_gvt_host.mpt->map_gfn_to_mfn(vgpu->handle, gfn, mfn, nr,

	return intel_gvt_host.mpt->map_gfn_to_mfn(vgpu->handle, gfn, mfn, nr,

						  map);

						  map);

}

}
@@ -278,6 +298,10 @@ static inline int intel_gvt_hypervisor_map_gfn_to_mfn( 
static inline int intel_gvt_hypervisor_set_trap_area(

static inline int intel_gvt_hypervisor_set_trap_area(

		struct intel_vgpu *vgpu, u64 start, u64 end, bool map)

		struct intel_vgpu *vgpu, u64 start, u64 end, bool map)

{

{

	/* a MPT implementation could have MMIO trapped elsewhere */

	if (!intel_gvt_host.mpt->set_trap_area)

		return 0;



	return intel_gvt_host.mpt->set_trap_area(vgpu->handle, start, end, map);

	return intel_gvt_host.mpt->set_trap_area(vgpu->handle, start, end, map);

}

}