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ARM: Xen: fix initial build problems

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* The XEN_BALLOON code requires the balloon infrastructure that is not
  getting built on ARM.

* The tmem hypercall is not available on ARM

* ARMv6 does not support cmpxchg on 16-bit words that are used in the
  Xen grant table code, so we must ensure that Xen support is only
  built on ARMv7-only kernels not combined ARMv6/v7 kernels.

* sys-hypervisor.c needs to include linux/err.h in order to use the
  IS_ERR/PTR_ERR/ERR_PTR family of functions.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: xen-devel@lists.xensource.com
This commit is contained in:
Arnd Bergmann 2012-10-09 10:33:52 +00:00
parent f3accb122f
commit f880b67dcb
3 changed files with 4 additions and 0 deletions
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1
arch/arm/Kconfig
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@ -1846,6 +1846,7 @@ config XEN_DOM0
config XEN
bool "Xen guest support on ARM (EXPERIMENTAL)"
depends on EXPERIMENTAL && ARM && OF
depends on CPU_V7 && !CPU_V6
help
Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.

2
drivers/xen/Kconfig
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@ -3,6 +3,7 @@ menu "Xen driver support"
config XEN_BALLOON
bool "Xen memory balloon driver"
depends on !ARM
default y
help
The balloon driver allows the Xen domain to request more memory from
@ -145,6 +146,7 @@ config SWIOTLB_XEN
config XEN_TMEM
bool
depends on !ARM
default y if (CLEANCACHE || FRONTSWAP)
help
Shim to interface in-kernel Transcendent Memory hooks

1
drivers/xen/sys-hypervisor.c
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@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/err.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>