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accel/ivpu: Fix missing MMU events from reserved SSID

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Generate recovery when fault from reserved context is detected.
Add Abort (A) bit to reserved (1) SSID to ensure NPU also receives a fault.

There is no way to create a file_priv with reserved SSID
but it is still possible to receive MMU faults from that SSID
as it is a default NPU HW setting. Such situation will occur if
FW freed context related resources but still performed access to DRAM.

Signed-off-by: Karol Wachowski <karol.wachowski@intel.com>
Signed-off-by: Maciej Falkowski <maciej.falkowski@linux.intel.com>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250107173238.381120-9-maciej.falkowski@linux.intel.com
This commit is contained in:
Karol Wachowski 2025-01-07 18:32:31 +01:00 committed by Jacek Lawrynowicz
parent 4480912f3f
commit 353b8f4839
1 changed files with 4 additions and 3 deletions
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7
drivers/accel/ivpu/ivpu_mmu.c
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@ -725,8 +725,8 @@ static int ivpu_mmu_cdtab_entry_set(struct ivpu_device *vdev, u32 ssid, u64 cd_d
cd[2] = 0;
cd[3] = 0x0000000000007444;
/* For global context generate memory fault on VPU */
if (ssid == IVPU_GLOBAL_CONTEXT_MMU_SSID)
/* For global and reserved contexts generate memory fault on VPU */
if (ssid == IVPU_GLOBAL_CONTEXT_MMU_SSID || ssid == IVPU_RESERVED_CONTEXT_MMU_SSID)
cd[0] |= IVPU_MMU_CD_0_A;
if (valid)
@ -945,7 +945,8 @@ void ivpu_mmu_irq_evtq_handler(struct ivpu_device *vdev)
while ((event = ivpu_mmu_get_event(vdev))) {
ssid = FIELD_GET(IVPU_MMU_EVT_SSID_MASK, *event);
if (ssid == IVPU_GLOBAL_CONTEXT_MMU_SSID) {
if (ssid == IVPU_GLOBAL_CONTEXT_MMU_SSID ||
ssid == IVPU_RESERVED_CONTEXT_MMU_SSID) {
ivpu_mmu_dump_event(vdev, event);
ivpu_pm_trigger_recovery(vdev, "MMU event");
return;