DRM_XE_SVM kernel config entry is added so
xe svm feature can be configured before kernel
compilation.
Signed-off-by: Oak Zeng <oak.zeng@xxxxxxxxx>
Co-developed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@xxxxxxxxx>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@xxxxxxxxx>
Cc: Matthew Brost <matthew.brost@xxxxxxxxx>
Cc: Thomas Hellström <thomas.hellstrom@xxxxxxxxx>
Cc: Brian Welty <brian.welty@xxxxxxxxx>
---
drivers/gpu/drm/xe/Kconfig | 22 ++++++++++++++++++++++
drivers/gpu/drm/xe/Makefile | 5 +++++
drivers/gpu/drm/xe/xe_mmio.c | 5 +++++
drivers/gpu/drm/xe/xe_vm.c | 2 ++
4 files changed, 34 insertions(+)
diff --git a/drivers/gpu/drm/xe/Kconfig b/drivers/gpu/drm/xe/Kconfig
index 1b57ae38210d..6f498095a915 100644
--- a/drivers/gpu/drm/xe/Kconfig
+++ b/drivers/gpu/drm/xe/Kconfig
@@ -83,6 +83,28 @@ config DRM_XE_FORCE_PROBE
Use "!*" to block the probe of the driver for all known devices.
+config DRM_XE_SVM
+ bool "Enable Shared Virtual Memory support in xe"
+ depends on DRM_XE
+ depends on ARCH_ENABLE_MEMORY_HOTPLUG
+ depends on ARCH_ENABLE_MEMORY_HOTREMOVE
+ depends on MEMORY_HOTPLUG
+ depends on MEMORY_HOTREMOVE
+ depends on ARCH_HAS_PTE_DEVMAP
+ depends on SPARSEMEM_VMEMMAP
+ depends on ZONE_DEVICE
+ depends on DEVICE_PRIVATE
+ depends on MMU
+ select HMM_MIRROR
+ select MMU_NOTIFIER
+ default y
+ help
+ Choose this option if you want Shared Virtual Memory (SVM)
+ support in xe. With SVM, virtual address space is shared
+ between CPU and GPU. This means any virtual address such
+ as malloc or mmap returns, variables on stack, or global
+ memory pointers, can be used for GPU transparently.
+
menu "drm/Xe Debugging"
depends on DRM_XE
depends on EXPERT
diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index e16b84f79ddf..ae503f7c1f94 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -283,6 +283,11 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
i915-display/skl_universal_plane.o \
i915-display/skl_watermark.o
+xe-$(CONFIG_DRM_XE_SVM) += xe_svm.o \
+ xe_svm_devmem.o \
+ xe_svm_range.o \
+ xe_svm_migrate.o
+
ifeq ($(CONFIG_ACPI),y)
xe-$(CONFIG_DRM_XE_DISPLAY) += \
i915-display/intel_acpi.o \
diff --git a/drivers/gpu/drm/xe/xe_mmio.c b/drivers/gpu/drm/xe/xe_mmio.c
index 3d34dcfa3b3a..99810794bd94 100644
--- a/drivers/gpu/drm/xe/xe_mmio.c
+++ b/drivers/gpu/drm/xe/xe_mmio.c
@@ -286,7 +286,9 @@ int xe_mmio_probe_vram(struct xe_device *xe)
}
io_size -= min_t(u64, tile_size, io_size);
+#if IS_ENABLED(CONFIG_DRM_XE_SVM)
xe_svm_devm_add(tile, &tile->mem.vram);
+#endif
}
xe->mem.vram.actual_physical_size = total_size;
@@ -361,8 +363,11 @@ static void mmio_fini(struct drm_device *drm, void *arg)
pci_iounmap(to_pci_dev(xe->drm.dev), xe->mmio.regs);
if (xe->mem.vram.mapping)
iounmap(xe->mem.vram.mapping);
+
+#if IS_ENABLED(CONFIG_DRM_XE_SVM)
for_each_tile(tile, xe, id) {
xe_svm_devm_remove(xe, &tile->mem.vram);
+#endif
}
}
diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 712fe49d8fb2..3bf19c92e01f 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -1377,7 +1377,9 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags)
xe->usm.num_vm_in_non_fault_mode++;
mutex_unlock(&xe->usm.lock);
+#if IS_ENABLED(CONFIG_DRM_XE_SVM)
vm->svm = xe_create_svm(vm);
+#endif
trace_xe_vm_create(vm);
return vm;
--
2.26.3
