[SRU][J][PATCH 4/5] gve: Add page size register to the register_page_list command.

[Ian Whitfield]

From: John Fraker <jfraker at google.com>

BugLink: https://bugs.launchpad.net/bugs/2109537

This register is required on platforms with page sizes greater than 4k.
This is because the tx side of the driver vmaps the entire queue page
list of pages into a single flat address space, then uses the entire
space. Without communicating the guest page size to the backend, the
backend will only access the first 4k of each page in the queue page list.

Signed-off-by: Jordan Kimbrough <jrkim at google.com>
Signed-off-by: John Fraker <jfraker at google.com>
Reviewed-by: Willem de Bruijn <willemb at google.com>
Link: https://lore.kernel.org/r/20231128002648.320892-5-jfraker@google.com
Signed-off-by: Jakub Kicinski <kuba at kernel.org>
(cherry picked from commit 513072fb4bf816686473eec897194ce6a28e53db)
Signed-off-by: Ian Whitfield <ian.whitfield at canonical.com>
---
 drivers/net/ethernet/google/gve/gve_adminq.c | 1 +
 drivers/net/ethernet/google/gve/gve_adminq.h | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c
index 56658c2f32f5..ca072d996124 100644
--- a/drivers/net/ethernet/google/gve/gve_adminq.c
+++ b/drivers/net/ethernet/google/gve/gve_adminq.c
@@ -796,6 +796,7 @@ int gve_adminq_register_page_list(struct gve_priv *priv,
 		.page_list_id = cpu_to_be32(qpl->id),
 		.num_pages = cpu_to_be32(num_entries),
 		.page_address_list_addr = cpu_to_be64(page_list_bus),
+		.page_size = cpu_to_be64(PAGE_SIZE),
 	};
 
 	err = gve_adminq_execute_cmd(priv, &cmd);
diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h
index 3953f6f7a427..9982154a10af 100644
--- a/drivers/net/ethernet/google/gve/gve_adminq.h
+++ b/drivers/net/ethernet/google/gve/gve_adminq.h
@@ -149,9 +149,10 @@ struct gve_adminq_register_page_list {
 	__be32 page_list_id;
 	__be32 num_pages;
 	__be64 page_address_list_addr;
+	__be64 page_size;
 };
 
-static_assert(sizeof(struct gve_adminq_register_page_list) == 16);
+static_assert(sizeof(struct gve_adminq_register_page_list) == 24);
 
 struct gve_adminq_unregister_page_list {
 	__be32 page_list_id;
-- 
2.43.0