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drm/xe/vf: Add sanity check for GGTT configuration

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The VF GGTT configuration was prepared by the PF, which should be
trusted, was obtained from the GuC, which likely already did some
sanity checks too, but since it's a received data, we should have
our own sanity checks to detect early any misconfiguration.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Satyanarayana K V P <satyanarayana.k.v.p@intel.com>
Reviewed-by: Satyanarayana K V P <satyanarayana.k.v.p@intel.com>
Link: https://lore.kernel.org/r/20250602103325.549-4-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko
2025-06-02 12:33:25 +02:00
parent eb9b34734c
commit c12c729e97
1 changed files with 10 additions and 1 deletions
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11
drivers/gpu/drm/xe/xe_tile_sriov_vf.c
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@@ -11,6 +11,7 @@
#include "xe_ggtt.h"
#include "xe_gt_sriov_vf.h"
#include "xe_sriov.h"
#include "xe_sriov_printk.h"
#include "xe_tile_sriov_vf.h"
#include "xe_wopcm.h"
@@ -44,6 +45,7 @@ int xe_tile_sriov_vf_balloon_ggtt_locked(struct xe_tile *tile)
u64 ggtt_base = xe_gt_sriov_vf_ggtt_base(tile->primary_gt);
u64 ggtt_size = xe_gt_sriov_vf_ggtt(tile->primary_gt);
struct xe_device *xe = tile_to_xe(tile);
u64 wopcm = xe_wopcm_size(xe);
u64 start, end;
int err;
@@ -66,7 +68,14 @@ int xe_tile_sriov_vf_balloon_ggtt_locked(struct xe_tile *tile)
* |<--- balloon[0] --->|<-- VF -->|<-- balloon[1] ->|
*/
start = xe_wopcm_size(xe);
if (ggtt_base < wopcm || ggtt_base > GUC_GGTT_TOP ||
ggtt_size > GUC_GGTT_TOP - ggtt_base) {
xe_sriov_err(xe, "tile%u: Invalid GGTT configuration: %#llx-%#llx\n",
tile->id, ggtt_base, ggtt_base + ggtt_size - 1);
return -ERANGE;
}
start = wopcm;
end = ggtt_base;
if (end != start) {
err = xe_ggtt_node_insert_balloon_locked(tile->sriov.vf.ggtt_balloon[0],