Commit 8e5a5dc0 authored by Matthew Brost's avatar Matthew Brost
Browse files

drm/xe: Add modparam for SVM notifier size 



Useful to experiment with notifier size and how it affects performance.

v3:
 - Pull missing changes including in following patch (Thomas)
v5:
 - Spell out power of 2 (Thomas)

Signed-off-by: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarThomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: default avatarHimal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250306012657.3505757-31-matthew.brost@intel.com
parent d92eabb3

drivers/gpu/drm/xe/xe_module.c

+4 −0
Original line number Diff line number Diff line
@@ -22,9 +22,13 @@ struct xe_modparam xe_modparam = { 
	.guc_log_level = 3,

	.force_probe = CONFIG_DRM_XE_FORCE_PROBE,

	.wedged_mode = 1,

	.svm_notifier_size = 512,

	/* the rest are 0 by default */

};



module_param_named(svm_notifier_size, xe_modparam.svm_notifier_size, uint, 0600);

MODULE_PARM_DESC(svm_notifier_size, "Set the svm notifier size(in MiB), must be power of 2");



module_param_named_unsafe(force_execlist, xe_modparam.force_execlist, bool, 0444);

MODULE_PARM_DESC(force_execlist, "Force Execlist submission");

drivers/gpu/drm/xe/xe_module.h

+1 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ struct xe_modparam { 
	unsigned int max_vfs;

#endif

	int wedged_mode;

	u32 svm_notifier_size;

};



extern struct xe_modparam xe_modparam;

drivers/gpu/drm/xe/xe_svm.c

+3 −1
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
#include "xe_bo.h"

#include "xe_gt_tlb_invalidation.h"

#include "xe_migrate.h"

#include "xe_module.h"

#include "xe_pt.h"

#include "xe_svm.h"

#include "xe_ttm_vram_mgr.h"
@@ -607,7 +608,8 @@ int xe_svm_init(struct xe_vm *vm) 


	err = drm_gpusvm_init(&vm->svm.gpusvm, "Xe SVM", &vm->xe->drm,

			      current->mm, xe_svm_devm_owner(vm->xe), 0,

			      vm->size, SZ_512M, &gpusvm_ops, fault_chunk_sizes,

			      vm->size, xe_modparam.svm_notifier_size * SZ_1M,

			      &gpusvm_ops, fault_chunk_sizes,

			      ARRAY_SIZE(fault_chunk_sizes));

	if (err)

		return err;