linux-kernel - [tip: x86/apic] x86/smpboot: Teach it about topo.amd_node

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Date: Fri, 16 Feb 2024 15:17:30 -0000
From: "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>, Juergen Gross <jgross@...e.com>,
 Sohil Mehta <sohil.mehta@...el.com>, Michael Kelley <mhklinux@...look.com>,
 Zhang Rui <rui.zhang@...el.com>, Wang Wendy <wendy.wang@...el.com>,
 K Prateek Nayak <kprateek.nayak@....com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: x86/apic] x86/smpboot: Teach it about topo.amd_node_id

The following commit has been merged into the x86/apic branch of tip:

Commit-ID:     ace278e7eca6be5d36eb6f1efb660c13b66c4d64
Gitweb:        https://git.kernel.org/tip/ace278e7eca6be5d36eb6f1efb660c13b66c4d64
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Tue, 13 Feb 2024 22:04:13 +01:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Thu, 15 Feb 2024 22:07:37 +01:00

x86/smpboot: Teach it about topo.amd_node_id

When switching AMD over to the new topology parser then the match functions
need to look for AMD systems with the extended topology feature at the new
topo.amd_node_id member which is then holding the node id information.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Juergen Gross <jgross@...e.com>
Tested-by: Sohil Mehta <sohil.mehta@...el.com>
Tested-by: Michael Kelley <mhklinux@...look.com>
Tested-by: Zhang Rui <rui.zhang@...el.com>
Tested-by: Wang Wendy <wendy.wang@...el.com>
Tested-by: K Prateek Nayak <kprateek.nayak@....com>
Link: https://lore.kernel.org/r/20240212153625.082979150@linutronix.de

---
 arch/x86/kernel/smpboot.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 3f57ce6..9cdb056 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -488,6 +488,7 @@ static bool match_smt(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
 
 		if (c->topo.pkg_id == o->topo.pkg_id &&
 		    c->topo.die_id == o->topo.die_id &&
+		    c->topo.amd_node_id == o->topo.amd_node_id &&
 		    per_cpu_llc_id(cpu1) == per_cpu_llc_id(cpu2)) {
 			if (c->topo.core_id == o->topo.core_id)
 				return topology_sane(c, o, "smt");
@@ -509,10 +510,13 @@ static bool match_smt(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
 
 static bool match_die(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
 {
-	if (c->topo.pkg_id == o->topo.pkg_id &&
-	    c->topo.die_id == o->topo.die_id)
-		return true;
-	return false;
+	if (c->topo.pkg_id != o->topo.pkg_id || c->topo.die_id != o->topo.die_id)
+		return false;
+
+	if (cpu_feature_enabled(X86_FEATURE_TOPOEXT) && topology_amd_nodes_per_pkg() > 1)
+		return c->topo.amd_node_id == o->topo.amd_node_id;
+
+	return true;
 }
 
 static bool match_l2c(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)