Add a define for the highest level for which we can encode a huge PTE,
and use it for page-table building. Also update an assert that checks that
we don't try to encode for larger sizes.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Brian Welty <brian.welty@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231209151843.7903-2-thomas.hellstrom@linux.intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
{
u64 size, dma;
+ if (level > MAX_HUGEPTE_LEVEL)
+ return false;
+
/* Does the virtual range requested cover a huge pte? */
if (!xe_pt_covers(addr, next, level, &xe_walk->base))
return false;
struct xe_vm;
struct xe_vma;
+/* Largest huge pte is currently 1GiB. May become device dependent. */
+#define MAX_HUGEPTE_LEVEL 2
+
#define xe_pt_write(xe, map, idx, data) \
xe_map_wr(xe, map, (idx) * sizeof(u64), u64, data)
static u64 pte_encode_ps(u32 pt_level)
{
- XE_WARN_ON(pt_level > 2);
+ XE_WARN_ON(pt_level > MAX_HUGEPTE_LEVEL);
if (pt_level == 1)
return XE_PDE_PS_2M;