From: Jan Kiszka <jan.kiszka@siemens.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
x86 <x86@kernel.org>
Subject: [PATCH] x86: Let x2APIC support depend on interrupt remapping or guest support
Date: Mon, 04 May 2015 17:58:01 +0200 [thread overview]
Message-ID: <55479709.4030901@siemens.com> (raw)
We are able to use x2APIC mode in the absence of interrupt remapping on
certain hypervisors. So it if fine to disable IRQ_REMAP without having
to give up x2APIC support.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
arch/x86/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 226d569..95ec1ad 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -341,7 +341,7 @@ config X86_FEATURE_NAMES
config X86_X2APIC
bool "Support x2apic"
- depends on X86_LOCAL_APIC && X86_64 && IRQ_REMAP
+ depends on X86_LOCAL_APIC && X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST)
---help---
This enables x2apic support on CPUs that have this feature.
--
Siemens AG, Corporate Technology, CT RTC ITP SES-DE
Corporate Competence Center Embedded Linux
next reply other threads:[~2015-05-04 15:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 15:58 Jan Kiszka [this message]
2015-05-05 12:03 ` [tip:x86/apic] x86: Let x2APIC support depend on interrupt remapping or guest support tip-bot for Jan Kiszka
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