linux-kernel - [PATCH 2/2] xen: enable vnuma for PV guest.

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Date:	Wed, 13 Nov 2013 22:36:19 -0500
From:	Elena Ufimtseva <ufimtseva@...il.com>
To:	xen-devel@...ts.xenproject.org
Cc:	konrad.wilk@...cle.com, boris.ostrovsky@...cle.com,
	david.vrabel@...rix.com, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, x86@...nel.org, akpm@...ux-foundation.org,
	tangchen@...fujitsu.com, wency@...fujitsu.com,
	ian.campbell@...rix.com, stefano.stabellini@...citrix.com,
	mukesh.rathor@...cle.com, linux-kernel@...r.kernel.org,
	Elena Ufimtseva <ufimtseva@...il.com>
Subject: [PATCH 2/2] xen: enable vnuma for PV guest.

Enables numa if vnuma topology hypercall is supported and it is domU.

Signed-off-by: Elena Ufimtseva <ufimtseva@...il.com>
---
 arch/x86/xen/setup.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 09f3059..fe23ec2 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -20,6 +20,7 @@
 #include <asm/numa.h>
 #include <asm/xen/hypervisor.h>
 #include <asm/xen/hypercall.h>
+#include <asm/xen/vnuma.h>
 
 #include <xen/xen.h>
 #include <xen/page.h>
@@ -598,6 +599,9 @@ void __init xen_arch_setup(void)
 	WARN_ON(xen_set_default_idle());
 	fiddle_vdso();
 #ifdef CONFIG_NUMA
-	numa_off = 1;
+	if (!xen_initial_domain() && xen_vnuma_supported())
+		numa_off = 0;
+	else
+		numa_off = 1;
 #endif
 }
-- 
1.7.10.4

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