linux-kernel - [PATCH v12 17/18] xen/pvh/arm/arm64: Disable PV code that does not work with PVH (v2)

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Date:	Tue, 31 Dec 2013 23:35:44 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
	boris.ostrovsky@...cle.com, david.vrabel@...rix.com,
	stefano.stabellini@...citrix.com, mukesh.rathor@...cle.com
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH v12 17/18] xen/pvh/arm/arm64: Disable PV code that does not work with PVH (v2)

From: Mukesh Rathor <mukesh.rathor@...cle.com>

As we do not have yet a mechanism for that.

This also impacts the ARM/ARM64 code (which does not have
hotplug support yet).

Signed-off-by: Mukesh Rathor <mukesh.rathor@...cle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
 drivers/xen/cpu_hotplug.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/xen/cpu_hotplug.c b/drivers/xen/cpu_hotplug.c
index cc6513a..5f80802 100644
--- a/drivers/xen/cpu_hotplug.c
+++ b/drivers/xen/cpu_hotplug.c
@@ -4,6 +4,7 @@
 
 #include <xen/xen.h>
 #include <xen/xenbus.h>
+#include <xen/features.h>
 
 #include <asm/xen/hypervisor.h>
 #include <asm/cpu.h>
@@ -102,7 +103,8 @@ static int __init setup_vcpu_hotplug_event(void)
 	static struct notifier_block xsn_cpu = {
 		.notifier_call = setup_cpu_watcher };
 
-	if (!xen_pv_domain())
+	/* PVH/ARM/ARM64 TBD/FIXME: future work */
+	if (!xen_pv_domain() || xen_feature(XENFEAT_auto_translated_physmap))
 		return -ENODEV;
 
 	register_xenstore_notifier(&xsn_cpu);
-- 
1.8.3.1

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