From: Suresh Siddha <suresh.b.siddha@intel.com>
To: mingo@elte.hu, hpa@zytor.com, tglx@linutronix.de
Cc: travis@sgi.com, rusty@rustcorp.com.au, linux-kernel@vger.kernel.org
Subject: [patch] x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and()
Date: Mon, 22 Dec 2008 17:33:28 -0800 [thread overview]
Message-ID: <20081223013327.GA29686@linux-os.sc.intel.com> (raw)
From: Suresh Siddha <suresh.b.siddha@intel.com>
Subject: x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and()
These commits:
commit 95d313cf1c1ecedc8bec5727b09bdacbf67dfc45
Author: Mike Travis <travis@sgi.com>
Date: Tue Dec 16 17:33:54 2008 -0800
x86: Add cpu_mask_to_apicid_and
and
commit 6eeb7c5a99434596c5953a95baa17d2f085664e3
Author: Mike Travis <travis@sgi.com>
Date: Tue Dec 16 17:33:55 2008 -0800
x86: update add-cpu_mask_to_apicid_and to use struct cpumask*
broke interrupt delivery on x2apic platforms. As x2apic cluster mode uses
logical delivery mode, we need to use logical apicid instead of physical apicid
in x2apic_cpu_mask_to_apicid_and()
Impact: fixes the broken interrupt delivery issue on generic x2apic platforms.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
---
Index: tip/arch/x86/kernel/genx2apic_cluster.c
===================================================================
--- tip.orig/arch/x86/kernel/genx2apic_cluster.c 2008-12-22 17:15:38.000000000 -0800
+++ tip/arch/x86/kernel/genx2apic_cluster.c 2008-12-22 17:16:17.000000000 -0800
@@ -114,7 +114,7 @@
int cpu;
/*
- * We're using fixed IRQ delivery, can only return one phys APIC ID.
+ * We're using fixed IRQ delivery, can only return one logical APIC ID.
* May as well be the first.
*/
cpu = cpumask_first(cpumask);
@@ -130,14 +130,14 @@
int cpu;
/*
- * We're using fixed IRQ delivery, can only return one phys APIC ID.
+ * We're using fixed IRQ delivery, can only return one logical APIC ID.
* May as well be the first.
*/
for_each_cpu_and(cpu, cpumask, andmask)
if (cpumask_test_cpu(cpu, cpu_online_mask))
break;
if (cpu < nr_cpu_ids)
- return per_cpu(x86_cpu_to_apicid, cpu);
+ return per_cpu(x86_cpu_to_logical_apicid, cpu);
return BAD_APICID;
}
next reply other threads:[~2008-12-23 1:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-23 1:33 Suresh Siddha [this message]
2008-12-23 1:46 ` [patch] x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and() Mike Travis
2008-12-23 2:05 ` H. Peter Anvin
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