patch 'net/netvsc: use Hyper-V page size' has been queued to stable release 24.11.3

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 24.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/23/25. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/81d20aba32a4500746cc9714c61163d92d9b62ff

Thanks.

Kevin

---
>From 81d20aba32a4500746cc9714c61163d92d9b62ff Mon Sep 17 00:00:00 2001
From: Long Li <longli at microsoft.com>
Date: Fri, 18 Apr 2025 12:32:50 -0700
Subject: [PATCH] net/netvsc: use Hyper-V page size

[ upstream commit 2e81551053fcfc7d57b8907a2a8720805298d723 ]

The driver should always use Hyper-V page size for implementing RNDIS and
calculating PFN (Page Frame Number) for communicating with Hyper-V VSP.

It should not use system page size as it may be different to the Hyper-V
page size.

Fixes: 4e9c73e96e83 ("net/netvsc: add Hyper-V network device")

Signed-off-by: Long Li <longli at microsoft.com>
---
 drivers/net/netvsc/hn_rndis.c | 14 +++++++-------
 drivers/net/netvsc/hn_rxtx.c  | 16 ++++++++--------
 drivers/net/netvsc/hn_var.h   |  4 ----
 3 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/drivers/net/netvsc/hn_rndis.c b/drivers/net/netvsc/hn_rndis.c
index b2dae6474a..24723ff842 100644
--- a/drivers/net/netvsc/hn_rndis.c
+++ b/drivers/net/netvsc/hn_rndis.c
@@ -68,5 +68,5 @@ hn_rndis_rid(struct hn_data *hv)
 static void *hn_rndis_alloc(size_t size)
 {
-	return rte_zmalloc("RNDIS", size, rte_mem_page_size());
+	return rte_zmalloc("RNDIS", size, HYPERV_PAGE_SIZE);
 }
 
@@ -266,5 +266,5 @@ static int hn_nvs_send_rndis_ctrl(struct vmbus_channel *chan,
 	}
 
-	if (unlikely(reqlen > rte_mem_page_size())) {
+	if (unlikely(reqlen > HYPERV_PAGE_SIZE)) {
 		PMD_DRV_LOG(ERR, "RNDIS request %u greater than page size",
 			    reqlen);
@@ -272,9 +272,9 @@ static int hn_nvs_send_rndis_ctrl(struct vmbus_channel *chan,
 	}
 
-	sg.page = addr / rte_mem_page_size();
-	sg.ofs  = addr & PAGE_MASK;
+	sg.page = addr / HYPERV_PAGE_SIZE;
+	sg.ofs  = addr & HYPERV_PAGE_MASK;
 	sg.len  = reqlen;
 
-	if (sg.ofs + reqlen >  rte_mem_page_size()) {
+	if (sg.ofs + reqlen >  HYPERV_PAGE_SIZE) {
 		PMD_DRV_LOG(ERR, "RNDIS request crosses page boundary");
 		return -EINVAL;
@@ -481,5 +481,5 @@ hn_rndis_query(struct hn_data *hv, uint32_t oid,
 
 	comp_len = sizeof(*comp) + odlen;
-	comp = rte_zmalloc("QUERY", comp_len, rte_mem_page_size());
+	comp = rte_zmalloc("QUERY", comp_len, HYPERV_PAGE_SIZE);
 	if (!comp) {
 		error = -ENOMEM;
@@ -738,5 +738,5 @@ hn_rndis_set(struct hn_data *hv, uint32_t oid, const void *data, uint32_t dlen)
 
 	reqlen = sizeof(*req) + dlen;
-	req = rte_zmalloc("RNDIS_SET", reqlen, rte_mem_page_size());
+	req = rte_zmalloc("RNDIS_SET", reqlen, HYPERV_PAGE_SIZE);
 	if (!req)
 		return -ENOMEM;
diff --git a/drivers/net/netvsc/hn_rxtx.c b/drivers/net/netvsc/hn_rxtx.c
index 9d3948e03d..c79d971904 100644
--- a/drivers/net/netvsc/hn_rxtx.c
+++ b/drivers/net/netvsc/hn_rxtx.c
@@ -1432,8 +1432,8 @@ static unsigned int hn_get_slots(const struct rte_mbuf *m)
 	while (m) {
 		unsigned int size = rte_pktmbuf_data_len(m);
-		unsigned int offs = rte_mbuf_data_iova(m) & PAGE_MASK;
+		unsigned int offs = rte_mbuf_data_iova(m) & HYPERV_PAGE_MASK;
 
-		slots += (offs + size + rte_mem_page_size() - 1) /
-				rte_mem_page_size();
+		slots += (offs + size + HYPERV_PAGE_SIZE - 1) /
+				HYPERV_PAGE_SIZE;
 		m = m->next;
 	}
@@ -1450,11 +1450,11 @@ static unsigned int hn_fill_sg(struct vmbus_gpa *sg,
 	while (m) {
 		rte_iova_t addr = rte_mbuf_data_iova(m);
-		unsigned int page = addr / rte_mem_page_size();
-		unsigned int offset = addr & PAGE_MASK;
+		unsigned int page = addr / HYPERV_PAGE_SIZE;
+		unsigned int offset = addr & HYPERV_PAGE_MASK;
 		unsigned int len = rte_pktmbuf_data_len(m);
 
 		while (len > 0) {
 			unsigned int bytes = RTE_MIN(len,
-					rte_mem_page_size() - offset);
+					HYPERV_PAGE_SIZE - offset);
 
 			sg[segs].page = page;
@@ -1499,6 +1499,6 @@ static int hn_xmit_sg(struct hn_tx_queue *txq,
 		((char *)txd->rndis_pkt - (char *)txq->tx_rndis);
 
-	sg[0].page = addr / rte_mem_page_size();
-	sg[0].ofs = addr & PAGE_MASK;
+	sg[0].page = addr / HYPERV_PAGE_SIZE;
+	sg[0].ofs = addr & HYPERV_PAGE_MASK;
 	sg[0].len = RNDIS_PACKET_MSG_OFFSET_ABS(hn_rndis_pktlen(txd->rndis_pkt));
 	segs = 1;
diff --git a/drivers/net/netvsc/hn_var.h b/drivers/net/netvsc/hn_var.h
index 0f638bc5fd..f946b3d8ef 100644
--- a/drivers/net/netvsc/hn_var.h
+++ b/drivers/net/netvsc/hn_var.h
@@ -32,8 +32,4 @@
 #define HN_RX_EXTMBUF_ENABLE	0
 
-#ifndef PAGE_MASK
-#define PAGE_MASK (rte_mem_page_size() - 1)
-#endif
-
 struct hn_data;
 struct hn_txdesc;
-- 
2.50.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2025-07-18 20:29:12.990431325 +0100
+++ 0055-net-netvsc-use-Hyper-V-page-size.patch	2025-07-18 20:29:10.936907349 +0100
@@ -1 +1 @@
-From 2e81551053fcfc7d57b8907a2a8720805298d723 Mon Sep 17 00:00:00 2001
+From 81d20aba32a4500746cc9714c61163d92d9b62ff Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 2e81551053fcfc7d57b8907a2a8720805298d723 ]
+
@@ -13 +14,0 @@
-Cc: stable at dpdk.org