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Message-ID: <168557121713.404.15918712839713361105.tip-bot2@tip-bot2>
Date: Wed, 31 May 2023 22:13:37 -0000
From: "tip-bot2 for Steve Wahl" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Steve Wahl <steve.wahl@....com>,
Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: x86/platform] x86/platform/uv: Helper functions for allocating
and freeing conversion tables
The following commit has been merged into the x86/platform branch of tip:
Commit-ID: 45e9f9a99529a54a7ed195eea4aad102b9eadb23
Gitweb: https://git.kernel.org/tip/45e9f9a99529a54a7ed195eea4aad102b9eadb23
Author: Steve Wahl <steve.wahl@....com>
AuthorDate: Fri, 19 May 2023 14:07:49 -05:00
Committer: Dave Hansen <dave.hansen@...ux.intel.com>
CommitterDate: Wed, 31 May 2023 09:34:59 -07:00
x86/platform/uv: Helper functions for allocating and freeing conversion tables
Add alloc_conv_table() and FREE_1_TO_1_TABLE() to reduce duplicated
code among the conversion tables we use.
Signed-off-by: Steve Wahl <steve.wahl@....com>
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Link: https://lore.kernel.org/all/20230519190752.3297140-6-steve.wahl%40hpe.com
---
arch/x86/kernel/apic/x2apic_uv_x.c | 97 +++++++++++++++--------------
1 file changed, 53 insertions(+), 44 deletions(-)
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 2da84be..1bd15b1 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -1491,16 +1491,50 @@ static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
pr_info("UV: number nodes/possible blades %d\n", uv_pb);
}
+static int __init alloc_conv_table(int num_elem, unsigned short **table)
+{
+ int i;
+ size_t bytes;
+
+ bytes = num_elem * sizeof(*table[0]);
+ *table = kmalloc(bytes, GFP_KERNEL);
+ if (WARN_ON_ONCE(!*table))
+ return -ENOMEM;
+ for (i = 0; i < num_elem; i++)
+ ((unsigned short *)*table)[i] = SOCK_EMPTY;
+ return 0;
+}
+
+/* Remove conversion table if it's 1:1 */
+#define FREE_1_TO_1_TABLE(tbl, min, max, max2) free_1_to_1_table(&tbl, #tbl, min, max, max2)
+
+static void __init free_1_to_1_table(unsigned short **tp, char *tname, int min, int max, int max2)
+{
+ int i;
+ unsigned short *table = *tp;
+
+ if (table == NULL)
+ return;
+ if (max != max2)
+ return;
+ for (i = 0; i < max; i++) {
+ if (i != table[i])
+ return;
+ }
+ kfree(table);
+ *tp = NULL;
+ pr_info("UV: %s is 1:1, conversion table removed\n", tname);
+}
+
static void __init build_socket_tables(void)
{
struct uv_gam_range_entry *gre = uv_gre_table;
- int num, nump;
+ int nums, numn, nump;
int cpu, i, lnid;
int minsock = _min_socket;
int maxsock = _max_socket;
int minpnode = _min_pnode;
int maxpnode = _max_pnode;
- size_t bytes;
if (!gre) {
if (is_uv2_hub() || is_uv3_hub()) {
@@ -1511,22 +1545,20 @@ static void __init build_socket_tables(void)
BUG();
}
- /* Build socket id -> node id, pnode */
- num = maxsock - minsock + 1;
- bytes = num * sizeof(_socket_to_node[0]);
- _socket_to_node = kmalloc(bytes, GFP_KERNEL);
- _socket_to_pnode = kmalloc(bytes, GFP_KERNEL);
-
+ numn = num_possible_nodes();
nump = maxpnode - minpnode + 1;
- bytes = nump * sizeof(_pnode_to_socket[0]);
- _pnode_to_socket = kmalloc(bytes, GFP_KERNEL);
- BUG_ON(!_socket_to_node || !_socket_to_pnode || !_pnode_to_socket);
-
- for (i = 0; i < num; i++)
- _socket_to_node[i] = _socket_to_pnode[i] = SOCK_EMPTY;
-
- for (i = 0; i < nump; i++)
- _pnode_to_socket[i] = SOCK_EMPTY;
+ nums = maxsock - minsock + 1;
+
+ /* Allocate and clear tables */
+ if ((alloc_conv_table(nump, &_pnode_to_socket) < 0)
+ || (alloc_conv_table(nums, &_socket_to_pnode) < 0)
+ || (alloc_conv_table(numn, &_node_to_pnode) < 0)
+ || (alloc_conv_table(nums, &_socket_to_node) < 0)) {
+ kfree(_pnode_to_socket);
+ kfree(_socket_to_pnode);
+ kfree(_node_to_pnode);
+ return;
+ }
/* Fill in pnode/node/addr conversion list values: */
pr_info("UV: GAM Building socket/pnode conversion tables\n");
@@ -1565,10 +1597,6 @@ static void __init build_socket_tables(void)
}
/* Set up physical blade to pnode translation from GAM Range Table: */
- bytes = num_possible_nodes() * sizeof(_node_to_pnode[0]);
- _node_to_pnode = kmalloc(bytes, GFP_KERNEL);
- BUG_ON(!_node_to_pnode);
-
for (lnid = 0; lnid < num_possible_nodes(); lnid++) {
unsigned short sockid;
@@ -1585,31 +1613,12 @@ static void __init build_socket_tables(void)
}
/*
- * If socket id == pnode or socket id == node for all nodes,
+ * If e.g. socket id == pnode for all pnodes,
* system runs faster by removing corresponding conversion table.
*/
- pr_info("UV: Checking socket->node/pnode for identity maps\n");
- if (minsock == 0) {
- for (i = 0; i < num; i++)
- if (_socket_to_node[i] == SOCK_EMPTY || i != _socket_to_node[i])
- break;
- if (i >= num) {
- kfree(_socket_to_node);
- _socket_to_node = NULL;
- pr_info("UV: 1:1 socket_to_node table removed\n");
- }
- }
- if (minsock == minpnode) {
- for (i = 0; i < num; i++)
- if (_socket_to_pnode[i] != SOCK_EMPTY &&
- _socket_to_pnode[i] != i + minpnode)
- break;
- if (i >= num) {
- kfree(_socket_to_pnode);
- _socket_to_pnode = NULL;
- pr_info("UV: 1:1 socket_to_pnode table removed\n");
- }
- }
+ FREE_1_TO_1_TABLE(_socket_to_node, _min_socket, nums, numn);
+ FREE_1_TO_1_TABLE(_socket_to_pnode, _min_pnode, nums, nump);
+ FREE_1_TO_1_TABLE(_pnode_to_socket, _min_pnode, nums, nump);
}
/* Check which reboot to use */
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