Thread (12 messages) 12 messages, 3 authors, 2026-04-02

Re: [PATCH v8 net-next 6/6] octeontx2-af: npc: Support for custom KPU profile from filesystem

From: Simon Horman <horms@kernel.org>
Date: 2026-03-27 13:30:41
Also in: lkml

On Wed, Mar 25, 2026 at 12:51:59PM +0530, Ratheesh Kannoth wrote:

...

Thanks for the updates, much appreciated.

I have a few more minor questions.
+void npc_load_kpu_profile(struct rvu *rvu)
+{
+	struct npc_kpu_profile_adapter *profile = &rvu->kpu;
+	const char *kpu_profile = rvu->kpu_pfl_name;
+
+	profile->from_fs = false;
+
+	/* If user not specified profile customization */
+	if (!strncmp(kpu_profile, def_pfl_name, KPU_NAME_LEN))  {
+		npc_prepare_default_kpu(rvu, profile);
+		return;
+	}
+
+	/* Order of preceedence for load loading NPC profile (high to low)
+	 * Firmware binary in filesystem.
+	 * Firmware database method.
+	 * Default KPU profile.
+	 */
+
+	/* No support for filesystem KPU loading for cn20k */
+npc_prepare_default_kpu	if (!is_cn20k(rvu->pdev)) {
+		if (!npc_load_kpu_profile_from_fs(rvu))
AI review flags that:

npc_load_kpu_profile_from_fs() calls npc_apply_custom_kpu(),
which returns early if the following condition is met.

	if (fw->kpus > profile->kpus)

Does npc_prepare_default_kpu() need to be called before
npc_load_kpu_profile_from_fs() to initialise profile->kpus,
which is 0 by default due to profile being allocated using devm_kzalloc()?
+			return;
+	}
+
+	/* First prepare default KPU, then we'll customize top entries. */
+	npc_prepare_default_kpu(rvu, profile);
+	if (!npc_load_kpu_profile_from_fw(rvu))
+		return;
 
-revert_to_default:
 	npc_prepare_default_kpu(rvu, profile);
Is this call to npc_prepare_default_kpu() still needed?
 }
 
 static void npc_parser_profile_init(struct rvu *rvu, int blkaddr)
 {
+	struct npc_kpu_profile_adapter *profile = &rvu->kpu;
 	struct rvu_hwinfo *hw = rvu->hw;
 	int num_pkinds, num_kpus, idx;
 
...
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