linux-kernel - [PATCH 09/16] habanalabs/gaudi: add monitored SOBs to state dump

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]

Message-Id: <20210818133922.63637-9-ogabbay@kernel.org>
Date:   Wed, 18 Aug 2021 16:39:15 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Alon Mizrahi <amizrahi@...ana.ai>
Subject: [PATCH 09/16] habanalabs/gaudi: add monitored SOBs to state dump

From: Alon Mizrahi <amizrahi@...ana.ai>

Current "state dump" is lacking of monitored SOB IDs. Add for
convenience.

Signed-off-by: Alon Mizrahi <amizrahi@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/gaudi/gaudi.c  | 38 ++++++++++++++++++++++++--
 drivers/misc/habanalabs/gaudi/gaudiP.h |  1 +
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index e9a8ed96fe65..d18a1ab42897 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -108,6 +108,8 @@
 
 #define BIN_REG_STRING_SIZE	sizeof("0b10101010101010101010101010101010")
 
+#define MONITOR_SOB_STRING_SIZE		256
+
 static const char gaudi_irq_name[GAUDI_MSI_ENTRIES][GAUDI_MAX_STRING_LEN] = {
 		"gaudi cq 0_0", "gaudi cq 0_1", "gaudi cq 0_2", "gaudi cq 0_3",
 		"gaudi cq 1_0", "gaudi cq 1_1", "gaudi cq 1_2", "gaudi cq 1_3",
@@ -9185,6 +9187,34 @@ static int gaudi_monitor_valid(struct hl_mon_state_dump *mon)
 		mon->status);
 }
 
+static void gaudi_fill_sobs_from_mon(char *sobs, struct hl_mon_state_dump *mon)
+{
+	const size_t max_write = 10;
+	u32 gid, mask, sob;
+	int i, offset;
+
+	/* Sync object ID is calculated as follows:
+	 * (8 * group_id + cleared bits in mask)
+	 */
+	gid = FIELD_GET(SYNC_MNGR_W_S_SYNC_MNGR_OBJS_MON_ARM_0_SID_MASK,
+			mon->arm_data);
+	mask = FIELD_GET(SYNC_MNGR_W_S_SYNC_MNGR_OBJS_MON_ARM_0_MASK_MASK,
+			mon->arm_data);
+
+	for (i = 0, offset = 0; mask && offset < MONITOR_SOB_STRING_SIZE -
+		max_write; mask >>= 1, i++) {
+		if (!(mask & 1)) {
+			sob = gid * MONITOR_MAX_SOBS + i;
+
+			if (offset > 0)
+				offset += snprintf(sobs + offset, max_write,
+							", ");
+
+			offset += snprintf(sobs + offset, max_write, "%u", sob);
+		}
+	}
+}
+
 static int gaudi_print_single_monitor(char **buf, size_t *size, size_t *offset,
 				struct hl_device *hdev,
 				struct hl_mon_state_dump *mon)
@@ -9192,14 +9222,17 @@ static int gaudi_print_single_monitor(char **buf, size_t *size, size_t *offset,
 	const char *name;
 	char scratch_buf1[BIN_REG_STRING_SIZE],
 		scratch_buf2[BIN_REG_STRING_SIZE];
+	char monitored_sobs[MONITOR_SOB_STRING_SIZE] = {0};
 
 	name = hl_state_dump_get_monitor_name(hdev, mon);
 	if (!name)
 		name = "";
 
+	gaudi_fill_sobs_from_mon(monitored_sobs, mon);
+
 	return hl_snprintf_resize(
 		buf, size, offset,
-		"Mon id: %u%s, wait for group id: %u mask %s to reach val: %u and write %u to address 0x%llx. Pending: %s",
+		"Mon id: %u%s, wait for group id: %u mask %s to reach val: %u and write %u to address 0x%llx. Pending: %s. Means sync objects [%s] are being monitored.",
 		mon->id, name,
 		FIELD_GET(SYNC_MNGR_W_S_SYNC_MNGR_OBJS_MON_ARM_0_SID_MASK,
 				mon->arm_data),
@@ -9216,7 +9249,8 @@ static int gaudi_print_single_monitor(char **buf, size_t *size, size_t *offset,
 			scratch_buf2, sizeof(scratch_buf2),
 			FIELD_GET(
 				SYNC_MNGR_W_S_SYNC_MNGR_OBJS_MON_STATUS_0_PENDING_MASK,
-				mon->status)));
+				mon->status)),
+		monitored_sobs);
 }
 
 
diff --git a/drivers/misc/habanalabs/gaudi/gaudiP.h b/drivers/misc/habanalabs/gaudi/gaudiP.h
index 838e98b0d43d..eacc5eadda97 100644
--- a/drivers/misc/habanalabs/gaudi/gaudiP.h
+++ b/drivers/misc/habanalabs/gaudi/gaudiP.h
@@ -117,6 +117,7 @@
 	(((mmSYNC_MNGR_E_N_SYNC_MNGR_OBJS_MON_STATUS_511 - \
 	mmSYNC_MNGR_E_N_SYNC_MNGR_OBJS_MON_STATUS_0) + 4) >> 2)
 
+#define MONITOR_MAX_SOBS	8
 
 /* DRAM Memory Map */
 
-- 
2.17.1