diff options
| author | Jeremy Fitzhardinge <jeremy@xensource.com> | 2007-07-17 18:37:06 -0700 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-07-18 08:47:44 -0700 |
| commit | f87e4cac4f4e940b328d3deb5b53e642e3881f43 (patch) | |
| tree | 7409f86561e5f97459378abd2ae21e9a5c82bfea /arch/i386/xen/Kconfig | |
| parent | ab55028886dd1dd54585f22bf19a00eb23869340 (diff) | |
xen: SMP guest support
This is a fairly straightforward Xen implementation of smp_ops.
Xen has its own IPI mechanisms, and has no dependency on any
APIC-based IPI. The smp_ops hooks and the flush_tlb_others pv_op
allow a Xen guest to avoid all APIC code in arch/i386 (the only apic
operation is a single apic_read for the apic version number).
One subtle point which needs to be addressed is unpinning pagetables
when another cpu may have a lazy tlb reference to the pagetable. Xen
will not allow an in-use pagetable to be unpinned, so we must find any
other cpus with a reference to the pagetable and get them to shoot
down their references.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/i386/xen/Kconfig')
| -rw-r--r-- | arch/i386/xen/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/i386/xen/Kconfig b/arch/i386/xen/Kconfig index 7c5550058c1..b7697ff2236 100644 --- a/arch/i386/xen/Kconfig +++ b/arch/i386/xen/Kconfig @@ -4,7 +4,7 @@ config XEN bool "Enable support for Xen hypervisor" - depends on PARAVIRT && X86_CMPXCHG && X86_TSC && !(PREEMPT || SMP || NEED_MULTIPLE_NODES) + depends on PARAVIRT && X86_CMPXCHG && X86_TSC && !(PREEMPT || NEED_MULTIPLE_NODES) help This is the Linux Xen port. Enabling this will allow the kernel to boot in a paravirtualized environment under the |