linux-kernel - [patch V6 18/19] x86/xen/smp

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Message-ID: <20240212153625.576579177@linutronix.de>
Date: Tue, 13 Feb 2024 22:04:24 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org,
 Tom Lendacky <thomas.lendacky@....com>,
 Andrew Cooper <andrew.cooper3@...rix.com>,
 Arjan van de Ven <arjan@...ux.intel.com>,
 Huang Rui <ray.huang@....com>,
 Juergen Gross <jgross@...e.com>,
 Dimitri Sivanich <dimitri.sivanich@....com>,
 Sohil Mehta <sohil.mehta@...el.com>,
 K Prateek Nayak <kprateek.nayak@....com>,
 Kan Liang <kan.liang@...ux.intel.com>,
 Zhang Rui <rui.zhang@...el.com>,
 "Paul E. McKenney" <paulmck@...nel.org>,
 Feng Tang <feng.tang@...el.com>,
 Andy Shevchenko <andy@...radead.org>,
 Michael Kelley <mhklinux@...look.com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Wang Wendy <wendy.wang@...el.com>
Subject: [patch V6 18/19] x86/xen/smp_pv: Remove cpudata fiddling

From: Thomas Gleixner <tglx@...utronix.de>

The new topology CPUID parser installs already fake topology for XEN/PV,
which ends up with cpuinfo::max_cores = 1.

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>

---
 arch/x86/xen/smp_pv.c |    3 ---
 1 file changed, 3 deletions(-)
---

--- a/arch/x86/xen/smp_pv.c
+++ b/arch/x86/xen/smp_pv.c
@@ -73,7 +73,6 @@ static void cpu_bringup(void)
 	}
 	cpu = smp_processor_id();
 	smp_store_cpu_info(cpu);
-	cpu_data(cpu).x86_max_cores = 1;
 	set_cpu_sibling_map(cpu);

 	speculative_store_bypass_ht_init();
@@ -224,8 +223,6 @@ static void __init xen_pv_smp_prepare_cp

 	smp_prepare_cpus_common();

-	cpu_data(0).x86_max_cores = 1;
-
 	speculative_store_bypass_ht_init();

 	xen_pmu_init(0);