linux-kernel - [PATCH 5/8] accel/habanalabs/gaudi2: assume hard-reset by FW upon MC SEI severe error

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Mon, 27 May 2024 15:12:51 +0300
From: Ofir Bitton <obitton@...ana.ai>
To: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc: Tomer Tayar <ttayar@...ana.ai>
Subject: [PATCH 5/8] accel/habanalabs/gaudi2: assume hard-reset by FW upon MC SEI severe error

From: Tomer Tayar <ttayar@...ana.ai>

FW initiates a hard reset upon an MC SEI severe error.
Align the driver to expect this reset and avoid accessing the device
until the reset is done.

Signed-off-by: Tomer Tayar <ttayar@...ana.ai>
Reviewed-by: Ofir Bitton <obitton@...ana.ai>
---
 drivers/accel/habanalabs/gaudi2/gaudi2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/accel/habanalabs/gaudi2/gaudi2.c b/drivers/accel/habanalabs/gaudi2/gaudi2.c
index 18cc7b773650..4791582d157c 100644
--- a/drivers/accel/habanalabs/gaudi2/gaudi2.c
+++ b/drivers/accel/habanalabs/gaudi2/gaudi2.c
@@ -10004,6 +10004,7 @@ static void gaudi2_handle_eqe(struct hl_device *hdev, struct hl_eq_entry *eq_ent
 		if (gaudi2_handle_hbm_mc_sei_err(hdev, event_type, &eq_entry->sei_data)) {
 			reset_flags |= HL_DRV_RESET_FW_FATAL_ERR;
 			reset_required = true;
+			is_critical = eq_entry->sei_data.hdr.is_critical;
 		}
 		error_count++;
 		break;
@@ -10235,8 +10236,7 @@ static void gaudi2_handle_eqe(struct hl_device *hdev, struct hl_eq_entry *eq_ent
 		gaudi2_print_event(hdev, event_type, true,
 				"No error cause for H/W event %u", event_type);
 
-	if ((gaudi2_irq_map_table[event_type].reset != EVENT_RESET_TYPE_NONE) ||
-				reset_required) {
+	if ((gaudi2_irq_map_table[event_type].reset != EVENT_RESET_TYPE_NONE) || reset_required) {
 		if (reset_required ||
 				(gaudi2_irq_map_table[event_type].reset == EVENT_RESET_TYPE_HARD))
 			reset_flags |= HL_DRV_RESET_HARD;
-- 
2.34.1