From: Dou Liyang <douly.fnst@cn.fujitsu.com>
To: <x86@kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <tglx@linutronix.de>, <mingo@kernel.org>, <hpa@zytor.com>,
<yinghai@kernel.org>, <bhe@redhat.com>,
Dou Liyang <douly.fnst@cn.fujitsu.com>,
<xen-devel@lists.xenproject.org>, <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>
Subject: [PATCH v9 10/12] x86/xen: Bypass intr mode setup in enlighten_pv system
Date: Wed, 13 Sep 2017 17:12:53 +0800 [thread overview]
Message-ID: <1505293975-26005-11-git-send-email-douly.fnst@cn.fujitsu.com> (raw)
In-Reply-To: <1505293975-26005-1-git-send-email-douly.fnst@cn.fujitsu.com>
XEN PV overrides smp_prepare_cpus(). xen_pv_smp_prepare_cpus()
initializes interrupts in the XEN PV specific way and does not invoke
native_smp_prepare_cpus(). As a consequence, x86_init.intr_mode_init() is
not invoked either.
The invocation of x86_init.intr_mode_init() will be moved from
native_smp_prepare_cpus() in a follow up patch to solve <INSERT
REASON/PROBLEM>.
That move would cause the invocation of x86_init.intr_mode_init() for XEN
PV platforms. To prevent that, override the default x86_init.intr_mode_init()
callback with a noop().
[Rewrited by Thomas Gleixner <tglx@linutronix.de>]
Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: xen-devel@lists.xenproject.org
Cc: boris.ostrovsky@oracle.com
Cc: Juergen Gross <jgross@suse.com>
---
arch/x86/xen/enlighten_pv.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index ae2a2e2..934dc7f 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -1232,6 +1232,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
x86_platform.get_nmi_reason = xen_get_nmi_reason;
x86_init.resources.memory_setup = xen_memory_setup;
+ x86_init.irqs.intr_mode_init = x86_init_noop;
x86_init.oem.arch_setup = xen_arch_setup;
x86_init.oem.banner = xen_banner;
--
2.5.5
next prev parent reply other threads:[~2017-09-13 9:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-13 9:12 [PATCH v9 00/12] Unify the interrupt delivery mode and do its setup in advance Dou Liyang
2017-09-13 9:12 ` [PATCH v9 01/12] x86/apic: Construct a selector for the interrupt delivery mode Dou Liyang
2017-09-13 9:12 ` [PATCH v9 02/12] x86/apic: Prepare for unifying the interrupt delivery modes setup Dou Liyang
2017-09-13 9:12 ` [PATCH v9 03/12] x86/apic: Split local APIC timer setup from the APIC setup Dou Liyang
2017-09-13 9:12 ` [PATCH v9 04/12] x86/apic: Move logical APIC ID away from apic_bsp_setup() Dou Liyang
2017-09-13 9:12 ` [PATCH v9 05/12] x86/apic: Unify interrupt mode setup for SMP-capable system Dou Liyang
2017-09-13 9:12 ` [PATCH v9 06/12] x86/apic: Mark the apic_intr_mode extern for sanity check cleanup Dou Liyang
2017-09-13 9:12 ` [PATCH v9 07/12] x86/apic: Unify interrupt mode setup for UP system Dou Liyang
2017-09-13 9:12 ` [PATCH v9 08/12] x86/ioapic: Refactor the delay logic in timer_irq_works() Dou Liyang
2017-09-13 9:12 ` [PATCH v9 09/12] x86/init: add intr_mode_init to x86_init_ops Dou Liyang
2017-09-13 9:12 ` Dou Liyang [this message]
2017-09-13 9:45 ` [Xen-devel] [PATCH v9 10/12] x86/xen: Bypass intr mode setup in enlighten_pv system Juergen Gross
2017-09-13 10:09 ` Dou Liyang
2017-09-13 10:22 ` [PATCH v10 " Dou Liyang
2017-09-13 9:12 ` [PATCH v9 11/12] x86/time: Initialize interrupt mode behind timer init Dou Liyang
2017-09-13 9:12 ` [PATCH v9 12/12] x86/apic: Remove the init_bsp_APIC() Dou Liyang
2017-09-13 9:17 ` [PATCH v9] ACPI / init: Invoke early ACPI initialization earlier Dou Liyang
2017-09-27 1:41 ` Dou Liyang
2017-09-27 7:19 ` Thomas Gleixner
2017-09-27 7:33 ` Dou Liyang
2017-09-27 9:02 ` Borislav Petkov
2017-09-27 10:06 ` Dou Liyang
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