[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-devel] [patch 18/26] Xen-paravirt_ops: Add XEN config options

The XEN config option enables the Xen paravirt_ops interface, which is
installed when the kernel finds itself running under Xen.

Xen is no longer a sub-architecture, so the X86_XEN subarch config
option has gone.

Xen is currently incompatible with:
- HZ: set to 100Hz for now, to cut down on VCPU context switch rate.
  This will be adapted to use tickless later.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Signed-off-by: Ian Pratt <ian.pratt@xxxxxxxxxxxxx>
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>

 arch/i386/Kconfig     |    2 ++
 arch/i386/xen/Kconfig |   10 ++++++++++
 2 files changed, 12 insertions(+)

--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -216,6 +216,8 @@ config PARAVIRT
          under a hypervisor, improving performance significantly.
          However, when run without a hypervisor the kernel is
          theoretically slower.  If in doubt, say N.
+source "arch/i386/xen/Kconfig"
 config VMI
        bool "VMI Paravirt-ops support"
--- /dev/null
+++ b/arch/i386/xen/Kconfig
@@ -0,0 +1,10 @@
+# This Kconfig describes xen options
+config XEN
+       bool "Enable support for Xen hypervisor"
+       depends on PARAVIRT && HZ_100 && !PREEMPT && !NO_HZ
+       default y
+       help
+         This is the Linux Xen port.


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.