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From: tip-bot for Jiang Liu <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: tglx@linutronix.de, bp@alien8.de, JBeulich@suse.com,
	hpa@linux.intel.com, yinghai@kernel.org, joro@8bytes.org,
	d.hatayama@jp.fujitsu.com, rientjes@google.com,
	linux-kernel@vger.kernel.org, oren@scalemp.com,
	jiang.liu@linux.intel.com, mingo@kernel.org, richard@nod.at,
	benh@kernel.crashing.org, tony.luck@intel.com, hpa@zytor.com
Subject: [tip:x86/apic] x86/apic: Correctly detect X2APIC status in function enable_IR()
Date: Thu, 15 Jan 2015 05:00:14 -0800
Message-ID: <tip-89356cf20ecb0b9975b1dad9ed605dd4c6e68bcd@git.kernel.org> (raw)
In-Reply-To: <1420615903-28253-7-git-send-email-jiang.liu@linux.intel.com>

Commit-ID:  89356cf20ecb0b9975b1dad9ed605dd4c6e68bcd
Gitweb:     http://git.kernel.org/tip/89356cf20ecb0b9975b1dad9ed605dd4c6e68bcd
Author:     Jiang Liu <jiang.liu@linux.intel.com>
AuthorDate: Wed, 7 Jan 2015 15:31:33 +0800
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Thu, 15 Jan 2015 11:24:23 +0100

x86/apic: Correctly detect X2APIC status in function enable_IR()

X2APIC will be disabled if user specifies "nox2apic" on kernel command
line, even when x2apic_preenabled is true. So correctly detect X2APIC
status by using x2apic_enabled() instead of x2apic_preenabled.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David Rientjes <rientjes@google.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Oren Twaig <oren@scalemp.com>
Link: http://lkml.kernel.org/r/1420615903-28253-7-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/x86/kernel/apic/apic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 2dbd3a0..11358df 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1581,7 +1581,7 @@ int __init enable_IR(void)
 		return -1;
 	}
 
-	if (!x2apic_preenabled && skip_ioapic_setup) {
+	if (!x2apic_enabled() && skip_ioapic_setup) {
 		pr_info("Skipped enabling intr-remap because of skipping "
 			"io-apic setup\n");
 		return -1;

  reply index

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-07  7:31 [Patch v2 00/16] Refine IR initialization flow and fixes bugs related to X2APIC Jiang Liu
2015-01-07  7:31 ` [Patch v2 01/16] iommu, x86: Restructure setup of the irq remapping feature Jiang Liu
2015-01-15 12:58   ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2015-01-07  7:31 ` [Patch v2 02/16] iommu/vt-d: Move iommu preparatory allocations to irq_remap_ops.prepare Jiang Liu
2015-01-15 12:58   ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2015-01-07  7:31 ` [Patch v2 03/16] iommu/vt-d: Convert allocations to GFP_KERNEL Jiang Liu
2015-01-15 12:59   ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2015-01-07  7:31 ` [Patch v2 04/16] x86/apic: Panic if kernel doesn't support x2apic but BIOS has enabled x2apic Jiang Liu
2015-01-15 12:59   ` [tip:x86/apic] x86/apic: Panic if kernel doesn' t " tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 05/16] x86/apic: Kill useless variable x2apic_enabled in function enable_IR_x2apic() Jiang Liu
2015-01-15 12:59   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 06/16] x86/apic: Correctly detect X2APIC status in function enable_IR() Jiang Liu
2015-01-15 13:00   ` tip-bot for Jiang Liu [this message]
2015-01-07  7:31 ` [Patch v2 07/16] x86/apic: Refine enable_IR_x2apic() and related functions Jiang Liu
2015-01-15  9:24   ` Thomas Gleixner
2015-01-15 13:00   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-15 13:00   ` [tip:x86/apic] x86/apic: Handle XAPIC remap mode proper tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 08/16] iommu/vt-d: Prepare for killing function irq_remapping_supported() Jiang Liu
2015-01-15 13:01   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 09/16] iommu/vt-d: Allocate IRQ remapping data structures only for all IOMMUs Jiang Liu
2015-01-15 13:01   ` [tip:x86/apic] " tip-bot for Joerg Roedel
2015-01-07  7:31 ` [Patch v2 10/16] iommu/vt-d: Allow IR works in XAPIC mode though CPU works in X2APIC mode Jiang Liu
2015-01-15 13:01   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 11/16] x86/apic: Only disable CPU x2apic mode when necessary Jiang Liu
2015-01-15 13:02   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 12/16] iommu/amd: Check for irq-remap support amd_iommu_prepare() Jiang Liu
2015-01-15 13:02   ` [tip:x86/apic] " tip-bot for Joerg Roedel
2015-01-07  7:31 ` [Patch v2 13/16] iommu/irq_remapping: Kill function irq_remapping_supported() and related code Jiang Liu
2015-01-15 13:02   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 14/16] iommu/irq_remapping: Refine function irq_remapping_prepare() for maintenance Jiang Liu
2015-01-15 13:03   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 15/16] iommu/irq_remapping: Change variable disable_irq_remap to be static Jiang Liu
2015-01-15 13:03   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-07  7:31 ` [Patch v2 16/16] iommu/irq_remapping: Normailize the way to detect whether IR is enabled Jiang Liu
2015-01-15 13:03   ` [tip:x86/apic] " tip-bot for Jiang Liu
2015-01-09 12:03 ` [Patch v2 00/16] Refine IR initialization flow and fixes bugs related to X2APIC Joerg Roedel
  -- strict thread matches above, loose matches on Subject: below --
2014-12-05  8:48 [patch 0/5] x86/iommu: Bootup stage cleanups Thomas Gleixner
2014-12-05  8:48 ` [patch 1/5] x86, smpboot: Remove pointless preempt_disable() in native_smp_prepare_cpus() Thomas Gleixner
2014-12-05 23:25   ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2014-12-19 14:02   ` tip-bot for Thomas Gleixner
2014-12-05  8:48 ` [patch 2/5] iommu, x86: Restructure setup of the irq remapping feature Thomas Gleixner
2014-12-05 23:25   ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2014-12-05  8:48 ` [patch 3/5] iommu/vt-d: Move iommu preparatory allocations to irq_remap_ops.prepare Thomas Gleixner
2014-12-05 23:26   ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2014-12-11  7:35     ` Yinghai Lu
2014-12-11 14:33       ` Jiang Liu
2014-12-11 17:57         ` Yinghai Lu
2014-12-11 20:30           ` Thomas Gleixner
2014-12-12  2:04             ` Yinghai Lu
2015-04-27 22:46               ` Yinghai Lu
2015-04-29  8:15                 ` Jiang Liu
2014-12-05  8:48 ` [patch 4/5] irqdomain: Revert gfp hackery Thomas Gleixner
2014-12-05 23:26   ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2014-12-05  8:48 ` [patch 5/5] iommu/vt-d: Convert allocations to GFP_KERNEL Thomas Gleixner
2014-12-05 23:26   ` [tip:x86/apic] " tip-bot for Thomas Gleixner
2014-12-05 12:22 ` [patch 0/5] x86/iommu: Bootup stage cleanups Joerg Roedel

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