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author | Jeremy Fitzhardinge <jeremy@xensource.com> | 2007-07-17 18:37:06 -0700 |
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committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-07-18 08:47:44 -0700 |
commit | f87e4cac4f4e940b328d3deb5b53e642e3881f43 (patch) | |
tree | 7409f86561e5f97459378abd2ae21e9a5c82bfea /include/xen | |
parent | ab55028886dd1dd54585f22bf19a00eb23869340 (diff) | |
download | linux-f87e4cac4f4e940b328d3deb5b53e642e3881f43.tar.bz2 |
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 'include/xen')
-rw-r--r-- | include/xen/events.h | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/include/xen/events.h b/include/xen/events.h index 77f71c906823..7abe4ddfac54 100644 --- a/include/xen/events.h +++ b/include/xen/events.h @@ -1,15 +1,32 @@ #ifndef _XEN_EVENTS_H #define _XEN_EVENTS_H -#include <linux/irq.h> +#include <linux/interrupt.h> + +#include <xen/interface/event_channel.h> +#include <asm/xen/hypercall.h> + +enum ipi_vector { + XEN_RESCHEDULE_VECTOR, + XEN_CALL_FUNCTION_VECTOR, + + XEN_NR_IPIS, +}; int bind_evtchn_to_irqhandler(unsigned int evtchn, - irqreturn_t (*handler)(int, void *), + irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id); int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, - irqreturn_t (*handler)(int, void *), - unsigned long irqflags, const char *devname, void *dev_id); + irq_handler_t handler, + unsigned long irqflags, const char *devname, + void *dev_id); +int bind_ipi_to_irqhandler(enum ipi_vector ipi, + unsigned int cpu, + irq_handler_t handler, + unsigned long irqflags, + const char *devname, + void *dev_id); /* * Common unbind function for all event sources. Takes IRQ to unbind from. @@ -18,6 +35,8 @@ int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, */ void unbind_from_irqhandler(unsigned int irq, void *dev_id); +void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); + static inline void notify_remote_via_evtchn(int port) { struct evtchn_send send = { .port = port }; |