@@ -98,39 +98,24 @@ config DRM_I915_USERPTR
If in doubt, say "Y".
-config DRM_I915_GVT
- bool "Enable Intel GVT-g graphics virtualization host support"
+config DRM_I915_GVT_KVMGT
+ tristate "Enable KVM host support Intel GVT-g graphics virtualization"
depends on DRM_I915
depends on 64BIT
- default n
+ depends on KVM
+ depends on VFIO_MDEV
help
Choose this option if you want to enable Intel GVT-g graphics
virtualization technology host support with integrated graphics.
With GVT-g, it's possible to have one integrated graphics
- device shared by multiple VMs under different hypervisors.
+ device shared by multiple VMs under KVM.
- Note that at least one hypervisor like Xen or KVM is required for
- this driver to work, and it only supports newer device from
- Broadwell+. For further information and setup guide, you can
- visit: http://01.org/igvt-g.
-
- Now it's just a stub to support the modifications of i915 for
- GVT device model. It requires at least one MPT modules for Xen/KVM
- and other components of GVT device model to work. Use it under
- you own risk.
+ Note that this driver only supports newer device from Broadwell on.
+ For further information and setup guide, you can visit:
+ http://01.org/igvt-g.
If in doubt, say "N".
-config DRM_I915_GVT_KVMGT
- tristate "Enable KVM/VFIO support for Intel GVT-g"
- depends on DRM_I915_GVT
- depends on KVM
- depends on VFIO_MDEV
- default n
- help
- Choose this option if you want to enable KVMGT support for
- Intel GVT-g.
-
menu "drm/i915 Debugging"
depends on DRM_I915
depends on EXPERT
@@ -289,8 +289,9 @@ i915-$(CONFIG_DRM_I915_SELFTEST) += \
# virtual gpu code
i915-y += i915_vgpu.o
-i915-$(CONFIG_DRM_I915_GVT) += \
- intel_gvt.o \
+i915-$(CONFIG_DRM_I915_GVT_KVMGT) += intel_gvt.o
+
+kvmgt-y += gvt/kvmgt.o \
gvt/gvt.o \
gvt/aperture_gm.o \
gvt/handlers.o \
@@ -315,7 +316,7 @@ i915-$(CONFIG_DRM_I915_GVT) += \
gvt/page_track.o
obj-$(CONFIG_DRM_I915) += i915.o
-obj-$(CONFIG_DRM_I915_GVT_KVMGT) += gvt/kvmgt.o
+obj-$(CONFIG_DRM_I915_GVT_KVMGT) += kvmgt.o
# header test
@@ -417,7 +417,7 @@ execlists_context_status_change(struct i915_request *rq, unsigned long status)
* Only used when GVT-g is enabled now. When GVT-g is disabled,
* The compiler should eliminate this function as dead-code.
*/
- if (!IS_ENABLED(CONFIG_DRM_I915_GVT))
+ if (!IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT))
return;
atomic_notifier_call_chain(&rq->engine->context_status_notifier,
@@ -911,7 +911,7 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
static bool ctx_single_port_submission(const struct intel_context *ce)
{
- return (IS_ENABLED(CONFIG_DRM_I915_GVT) &&
+ return (IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT) &&
intel_context_force_single_submission(ce));
}
@@ -39,8 +39,6 @@
#include <linux/vfio.h>
#include <linux/mdev.h>
-struct intel_gvt_host intel_gvt_host;
-
static const struct intel_gvt_ops intel_gvt_ops = {
.emulate_cfg_read = intel_vgpu_emulate_cfg_read,
.emulate_cfg_write = intel_vgpu_emulate_cfg_write,
@@ -147,13 +145,14 @@ static int init_service_thread(struct intel_gvt *gvt)
* resources owned by a GVT device.
*
*/
-void intel_gvt_clean_device(struct drm_i915_private *i915)
+static void intel_gvt_clean_device(struct drm_i915_private *i915)
{
struct intel_gvt *gvt = fetch_and_zero(&i915->gvt);
if (drm_WARN_ON(&i915->drm, !gvt))
return;
+ intel_gvt_hypervisor_host_exit(i915->drm.dev, gvt);
intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
intel_gvt_clean_vgpu_types(gvt);
@@ -181,7 +180,7 @@ void intel_gvt_clean_device(struct drm_i915_private *i915)
* Zero on success, negative error code if failed.
*
*/
-int intel_gvt_init_device(struct drm_i915_private *i915)
+static int intel_gvt_init_device(struct drm_i915_private *i915)
{
struct intel_gvt *gvt;
struct intel_vgpu *vgpu;
@@ -253,11 +252,17 @@ int intel_gvt_init_device(struct drm_i915_private *i915)
intel_gvt_debugfs_init(gvt);
+ ret = intel_gvt_hypervisor_host_init(i915->drm.dev, gvt,
+ &intel_gvt_ops);
+ if (ret)
+ goto out_destroy_idle_vgpu;
+
gvt_dbg_core("gvt device initialization is done\n");
- intel_gvt_host.dev = i915->drm.dev;
- intel_gvt_host.initialized = true;
return 0;
+out_destroy_idle_vgpu:
+ intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
+ intel_gvt_debugfs_clean(gvt);
out_clean_types:
intel_gvt_clean_vgpu_types(gvt);
out_clean_thread:
@@ -281,39 +286,18 @@ int intel_gvt_init_device(struct drm_i915_private *i915)
return ret;
}
-int
-intel_gvt_pm_resume(struct intel_gvt *gvt)
+static void intel_gvt_pm_resume(struct drm_i915_private *i915)
{
+ struct intel_gvt *gvt = i915->gvt;
+
intel_gvt_restore_fence(gvt);
intel_gvt_restore_mmio(gvt);
intel_gvt_restore_ggtt(gvt);
- return 0;
-}
-
-int
-intel_gvt_register_hypervisor(const struct intel_gvt_mpt *m)
-{
- int ret;
- void *gvt;
-
- if (!intel_gvt_host.initialized)
- return -ENODEV;
-
- intel_gvt_host.mpt = m;
- gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
-
- ret = intel_gvt_hypervisor_host_init(intel_gvt_host.dev, gvt,
- &intel_gvt_ops);
- if (ret < 0)
- return -ENODEV;
- return 0;
}
-EXPORT_SYMBOL_GPL(intel_gvt_register_hypervisor);
-void
-intel_gvt_unregister_hypervisor(void)
-{
- void *gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
- intel_gvt_hypervisor_host_exit(intel_gvt_host.dev, gvt);
-}
-EXPORT_SYMBOL_GPL(intel_gvt_unregister_hypervisor);
+const struct i915_virtual_gpu_ops intel_gvt_vgpu_ops = {
+ .init_device = intel_gvt_init_device,
+ .clean_device = intel_gvt_clean_device,
+ .pm_resume = intel_gvt_pm_resume,
+};
+EXPORT_SYMBOL_GPL(intel_gvt_vgpu_ops);
@@ -57,8 +57,6 @@
#define GVT_MAX_VGPU 8
struct intel_gvt_host {
- struct device *dev;
- bool initialized;
const struct intel_gvt_mpt *mpt;
};
@@ -727,9 +725,9 @@ void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu);
void intel_gvt_debugfs_init(struct intel_gvt *gvt);
void intel_gvt_debugfs_clean(struct intel_gvt *gvt);
-int intel_gvt_pm_resume(struct intel_gvt *gvt);
-
#include "trace.h"
#include "mpt.h"
+extern const struct i915_virtual_gpu_ops intel_gvt_vgpu_ops;
+
#endif
@@ -49,6 +49,8 @@
#include "i915_drv.h"
#include "gvt.h"
+MODULE_IMPORT_NS(I915_GVT);
+
static const struct intel_gvt_ops *intel_gvt_ops;
/* helper macros copied from vfio-pci */
@@ -2225,20 +2227,9 @@ static const struct intel_gvt_mpt kvmgt_mpt = {
.is_valid_gfn = kvmgt_is_valid_gfn,
};
-static int __init kvmgt_init(void)
-{
- if (intel_gvt_register_hypervisor(&kvmgt_mpt) < 0)
- return -ENODEV;
- return 0;
-}
-
-static void __exit kvmgt_exit(void)
-{
- intel_gvt_unregister_hypervisor();
-}
-
-module_init(kvmgt_init);
-module_exit(kvmgt_exit);
+struct intel_gvt_host intel_gvt_host = {
+ .mpt = &kvmgt_mpt,
+};
MODULE_LICENSE("GPL and additional rights");
MODULE_AUTHOR("Intel Corporation");
@@ -394,7 +394,4 @@ static inline bool intel_gvt_hypervisor_is_valid_gfn(
return intel_gvt_host.mpt->is_valid_gfn(vgpu->handle, gfn);
}
-int intel_gvt_register_hypervisor(const struct intel_gvt_mpt *);
-void intel_gvt_unregister_hypervisor(void);
-
#endif /* _GVT_MPT_H_ */
@@ -750,10 +750,17 @@ struct i915_frontbuffer_tracking {
unsigned flip_bits;
};
+struct i915_virtual_gpu_ops {
+ int (*init_device)(struct drm_i915_private *dev_priv);
+ void (*clean_device)(struct drm_i915_private *dev_priv);
+ void (*pm_resume)(struct drm_i915_private *i915);
+};
+
struct i915_virtual_gpu {
struct mutex lock; /* serialises sending of g2v_notify command pkts */
bool active;
u32 caps;
+ const struct i915_virtual_gpu_ops *ops;
};
struct intel_cdclk_config {
@@ -187,7 +187,7 @@ i915_param_named(enable_dpcd_backlight, int, 0400,
"Enable support for DPCD backlight control"
"(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enable, 2=force VESA interface, 3=force Intel interface)");
-#if IS_ENABLED(CONFIG_DRM_I915_GVT)
+#if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)
i915_param_named(enable_gvt, bool, 0400,
"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
#endif
@@ -25,6 +25,9 @@
#include "i915_vgpu.h"
#include "intel_gvt.h"
#include "gvt/gvt.h"
+#include "gt/intel_context.h"
+#include "gt/intel_ring.h"
+#include "gt/shmem_utils.h"
/**
* DOC: Intel GVT-g host support
@@ -115,14 +118,23 @@ int intel_gvt_init(struct drm_i915_private *dev_priv)
return -EIO;
}
- ret = intel_gvt_init_device(dev_priv);
+ request_module("kvmgt");
+ dev_priv->vgpu.ops = symbol_get(intel_gvt_vgpu_ops);
+ if (!dev_priv->vgpu.ops) {
+ drm_dbg(&dev_priv->drm, "Fail to find GVT ops\n");
+ goto bail;
+ }
+
+ ret = dev_priv->vgpu.ops->init_device(dev_priv);
if (ret) {
drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
- goto bail;
+ goto bail_put_ops;
}
return 0;
+bail_put_ops:
+ symbol_put(gvt_ops);
bail:
dev_priv->params.enable_gvt = 0;
return 0;
@@ -143,10 +155,10 @@ static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
*/
void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
{
- if (!intel_gvt_active(dev_priv))
- return;
-
- intel_gvt_clean_device(dev_priv);
+ if (intel_gvt_active(dev_priv)) {
+ dev_priv->vgpu.ops->clean_device(dev_priv);
+ symbol_put(dev_priv->vgpu.ops);
+ }
}
/**
@@ -160,5 +172,43 @@ void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
void intel_gvt_resume(struct drm_i915_private *dev_priv)
{
if (intel_gvt_active(dev_priv))
- intel_gvt_pm_resume(dev_priv->gvt);
+ dev_priv->vgpu.ops->pm_resume(dev_priv);
}
+
+/*
+ * Exported here so that the exports only get created when GVT support is
+ * actually enabled.
+ */
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_alloc, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_create_shmem, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_init, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_ggtt_pin_ww, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_pin_map, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_object_set_to_cpu_domain, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(__i915_gem_object_flush_map, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(__i915_gem_object_set_pages, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_gtt_insert, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_prime_export, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_init, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_backoff, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_fini, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_ppgtt_create, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_request_add, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_request_create, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_request_wait, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_reserve_fence, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_unreserve_fence, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_vm_release, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(i915_vma_move_to_active, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(intel_context_create, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(intel_context_unpin, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(__intel_context_do_pin, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(intel_ring_begin, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_get, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_put_unchecked, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_for_reg, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_get, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_put, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(shmem_pin_map, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(shmem_unpin_map, I915_GVT);
+EXPORT_SYMBOL_NS_GPL(__px_dma, I915_GVT);
@@ -26,11 +26,9 @@
struct drm_i915_private;
-#ifdef CONFIG_DRM_I915_GVT
+#if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)
int intel_gvt_init(struct drm_i915_private *dev_priv);
void intel_gvt_driver_remove(struct drm_i915_private *dev_priv);
-int intel_gvt_init_device(struct drm_i915_private *dev_priv);
-void intel_gvt_clean_device(struct drm_i915_private *dev_priv);
int intel_gvt_init_host(void);
void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv);
void intel_gvt_resume(struct drm_i915_private *dev_priv);
Instead of having an option to build the gvt code into the main i915 module, just move it into the kvmgt.ko module. This only requires a new struct with three entries that the main i915 module needs to request before enabling VGPU passthrough operations. This also conveniently streamlines the GVT initialization and avoids the need for the global device pointer. Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/gpu/drm/i915/Kconfig | 31 +++------ drivers/gpu/drm/i915/Makefile | 7 +- .../drm/i915/gt/intel_execlists_submission.c | 4 +- drivers/gpu/drm/i915/gvt/gvt.c | 56 ++++++---------- drivers/gpu/drm/i915/gvt/gvt.h | 6 +- drivers/gpu/drm/i915/gvt/kvmgt.c | 19 ++---- drivers/gpu/drm/i915/gvt/mpt.h | 3 - drivers/gpu/drm/i915/i915_drv.h | 7 ++ drivers/gpu/drm/i915/i915_params.c | 2 +- drivers/gpu/drm/i915/intel_gvt.c | 64 +++++++++++++++++-- drivers/gpu/drm/i915/intel_gvt.h | 4 +- 11 files changed, 107 insertions(+), 96 deletions(-)