patch 'fib6: add runtime checks in AVX512 lookup' has been queued to stable release 23.11.3

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 23.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/30/24. 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://git.dpdk.org/dpdk-stable/log/?h=23.11-staging

This queued commit can be viewed at:
https://git.dpdk.org/dpdk-stable/commit/?h=23.11-staging&id=f2905ef63cc3d39bb2d3bd6156613ee5c4479e1f

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From f2905ef63cc3d39bb2d3bd6156613ee5c4479e1f Mon Sep 17 00:00:00 2001
From: Vladimir Medvedkin <vladimir.medvedkin at intel.com>
Date: Tue, 8 Oct 2024 17:31:36 +0000
Subject: [PATCH] fib6: add runtime checks in AVX512 lookup
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit 45ddc5660f9830f3b7b39ddaf57af02e80d589a4 ]

AVX512 lookup function requires CPU to support RTE_CPUFLAG_AVX512DQ and
RTE_CPUFLAG_AVX512BW. Add runtime checks of these two flags when deciding
if vector function can be used.

Fixes: 1e5630e40d95 ("fib6: add AVX512 lookup")

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin at intel.com>
Reviewed-by: David Marchand <david.marchand at redhat.com>
---
 lib/fib/trie.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/fib/trie.c b/lib/fib/trie.c
index 09470e7287..7b33cdaa7b 100644
--- a/lib/fib/trie.c
+++ b/lib/fib/trie.c
@@ -46,8 +46,10 @@ static inline rte_fib6_lookup_fn_t
 get_vector_fn(enum rte_fib_trie_nh_sz nh_sz)
 {
 #ifdef CC_TRIE_AVX512_SUPPORT
-	if ((rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) <= 0) ||
-			(rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_512))
+	if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) <= 0 ||
+			rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512DQ) <= 0 ||
+			rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512BW) <= 0 ||
+			rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_512)
 		return NULL;
 	switch (nh_sz) {
 	case RTE_FIB6_TRIE_2B:
--
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-11-11 14:23:06.699294108 +0800
+++ 0030-fib6-add-runtime-checks-in-AVX512-lookup.patch	2024-11-11 14:23:05.072192841 +0800
@@ -1 +1 @@
-From 45ddc5660f9830f3b7b39ddaf57af02e80d589a4 Mon Sep 17 00:00:00 2001
+From f2905ef63cc3d39bb2d3bd6156613ee5c4479e1f Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit 45ddc5660f9830f3b7b39ddaf57af02e80d589a4 ]
@@ -11 +13,0 @@
-Cc: stable at dpdk.org