Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/xe/svm: Support DRM_XE_SVM_MEM_RANGE_ATTR_PAT memory attribute
This attributes sets the pat_index for the svm used vma range, which is
utilized to ascertain the coherence.
v2 (Matthew Brost)
- Pat index sanity check
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250821173104.3030148-12-himal.prasad.ghimiray@intel.com
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
+22
-2
+22
-2
drivers/gpu/drm/xe/xe_vm_madvise.c
+22
-2
drivers/gpu/drm/xe/xe_vm_madvise.c
···
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9
#include <drm/xe_drm.h>
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#include "xe_bo.h"
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+
#include "xe_pat.h"
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#include "xe_pt.h"
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#include "xe_svm.h"
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···
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struct xe_vma **vmas, int num_vmas,
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struct drm_xe_madvise *op)
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{
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-
/* Implementation pending */
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+
int i;
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+
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xe_assert(vm->xe, op->type == DRM_XE_MEM_RANGE_ATTR_PAT);
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+
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for (i = 0; i < num_vmas; i++)
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+
vmas[i]->attr.pat_index = op->pat_index.val;
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}
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typedef void (*madvise_func)(struct xe_device *xe, struct xe_vm *vm,
···
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break;
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case DRM_XE_MEM_RANGE_ATTR_PAT:
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-
/*TODO: Add valid pat check */
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+
{
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u16 coh_mode = xe_pat_index_get_coh_mode(xe, args->pat_index.val);
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+
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if (XE_IOCTL_DBG(xe, !coh_mode))
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return false;
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+
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if (XE_WARN_ON(coh_mode > XE_COH_AT_LEAST_1WAY))
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return false;
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+
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if (XE_IOCTL_DBG(xe, args->pat_index.pad))
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+
return false;
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+
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+
if (XE_IOCTL_DBG(xe, args->pat_index.reserved))
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return false;
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break;
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+
}
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default:
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if (XE_IOCTL_DBG(xe, 1))
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return false;