netdev - [PATCH net-next 11/13] bnxt_en: Add support for user configured RSS key

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: <20240205223202.25341-12-michael.chan@broadcom.com>
Date: Mon,  5 Feb 2024 14:32:00 -0800
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	andrew.gospodarek@...adcom.com,
	pavan.chebbi@...adcom.com
Subject: [PATCH net-next 11/13] bnxt_en: Add support for user configured RSS key

From: Pavan Chebbi <pavan.chebbi@...adcom.com>

Store the user configured or generated Toeplitz key in
bp->rss_hash_key.  The key stays constant across ifdown/ifup
unless updated by the user.

Signed-off-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c      | 18 ++++++++++++++++--
 drivers/net/ethernet/broadcom/bnxt/bnxt.h      |  4 ++++
 .../net/ethernet/broadcom/bnxt/bnxt_ethtool.c  |  6 ++++--
 3 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index a6e2b65c45ce..27941ade894a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -4246,9 +4246,23 @@ static void bnxt_init_vnics(struct bnxt *bp)
 				u8 *key = (void *)vnic->rss_hash_key;
 				int k;
 
+				if (!bp->rss_hash_key_valid &&
+				    !bp->rss_hash_key_updated) {
+					get_random_bytes(bp->rss_hash_key,
+							 HW_HASH_KEY_SIZE);
+					bp->rss_hash_key_updated = true;
+				}
+
+				memcpy(vnic->rss_hash_key, bp->rss_hash_key,
+				       HW_HASH_KEY_SIZE);
+
+				if (!bp->rss_hash_key_updated)
+					continue;
+
+				bp->rss_hash_key_updated = false;
+				bp->rss_hash_key_valid = true;
+
 				bp->toeplitz_prefix = 0;
-				get_random_bytes(vnic->rss_hash_key,
-					      HW_HASH_KEY_SIZE);
 				for (k = 0; k < 8; k++) {
 					bp->toeplitz_prefix <<= 8;
 					bp->toeplitz_prefix |= key[k];
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index a6b6db1546cc..28091889615b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2222,6 +2222,10 @@ struct bnxt {
 #define BNXT_RSS_CAP_NEW_RSS_CAP		BIT(2)
 #define BNXT_RSS_CAP_RSS_TCAM			BIT(3)
 
+	u8			rss_hash_key[HW_HASH_KEY_SIZE];
+	u8			rss_hash_key_valid:1;
+	u8			rss_hash_key_updated:1;
+
 	u16			max_mtu;
 	u8			max_tc;
 	u8			max_lltc;	/* lossless TCs */
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 6721c4a88453..9b5382412db3 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -1755,8 +1755,10 @@ static int bnxt_set_rxfh(struct net_device *dev,
 	if (rxfh->hfunc && rxfh->hfunc != ETH_RSS_HASH_TOP)
 		return -EOPNOTSUPP;
 
-	if (rxfh->key)
-		return -EOPNOTSUPP;
+	if (rxfh->key) {
+		memcpy(bp->rss_hash_key, rxfh->key, HW_HASH_KEY_SIZE);
+		bp->rss_hash_key_updated = true;
+	}
 
 	if (rxfh->indir) {
 		u32 i, pad, tbl_size = bnxt_get_rxfh_indir_size(dev);
-- 
2.30.1


Download attachment "smime.p7s" of type "application/pkcs7-signature" (4209 bytes)