Patch "x86/xen: make CONFIG_XEN depend on CONFIG_X86_LOCAL_APIC" has been added to the 4.1-stable tree

Patch "x86/xen: make CONFIG_XEN depend on CONFIG_X86_LOCAL_APIC" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    x86/xen: make CONFIG_XEN depend on CONFIG_X86_LOCAL_APIC

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     x86-xen-make-config_xen-depend-on-config_x86_local_apic.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 87ffd2b9bb74061c120f450e4d0f3409bb603ae0 Mon Sep 17 00:00:00 2001
From: David Vrabel <david.vrabel@citrix.com>
Date: Thu, 20 Aug 2015 11:33:41 +0100
Subject: x86/xen: make CONFIG_XEN depend on CONFIG_X86_LOCAL_APIC

From: David Vrabel <david.vrabel@citrix.com>

commit 87ffd2b9bb74061c120f450e4d0f3409bb603ae0 upstream.

Since commit feb44f1f7a4ac299d1ab1c3606860e70b9b89d69 (x86/xen:
Provide a "Xen PV" APIC driver to support >255 VCPUs) Xen guests need
a full APIC driver and thus should depend on X86_LOCAL_APIC.

This fixes an i386 build failure with !SMP && !CONFIG_X86_UP_APIC by
disabling Xen support in this configuration.

Users needing Xen support in a non-SMP i386 kernel will need to enable
CONFIG_X86_UP_APIC.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/xen/Kconfig |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -8,7 +8,7 @@ config XEN
 	select PARAVIRT_CLOCK
 	select XEN_HAVE_PVMMU
 	depends on X86_64 || (X86_32 && X86_PAE)
-	depends on X86_TSC
+	depends on X86_LOCAL_APIC && X86_TSC
 	help
 	  This is the Linux Xen port.  Enabling this will allow the
 	  kernel to boot in a paravirtualized environment under the
@@ -17,7 +17,7 @@ config XEN
 config XEN_DOM0
 	def_bool y
 	depends on XEN && PCI_XEN && SWIOTLB_XEN
-	depends on X86_LOCAL_APIC && X86_IO_APIC && ACPI && PCI
+	depends on X86_IO_APIC && ACPI && PCI
 
 config XEN_PVHVM
 	def_bool y


Patches currently in stable-queue which might be from david.vrabel@citrix.com are

queue-4.1/x86-xen-build-xen-pv-apic-driver-for-domu-as-well.patch
queue-4.1/x86-xen-make-config_xen-depend-on-config_x86_local_apic.patch
queue-4.1/xen-xenbus-don-t-leak-memory-when-unmapping-the-ring-on-hvm-backend.patch