[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH] xen: add kconfig for event_fifo
Evtchn fifos are not needed on smaller systems; the older interface is lightweight and sufficient. Make it possible to disable evtchn fifo. Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx> diff --git a/xen/common/Kconfig b/xen/common/Kconfig index a6aa2c5c14..14d82923c5 100644 --- a/xen/common/Kconfig +++ b/xen/common/Kconfig @@ -23,6 +23,16 @@ config GRANT_TABLE If unsure, say Y. +config EVTCHN_FIFO + bool "Event Channel Fifo support" if EXPERT + default y + help + The Event channel Fifo extends support for event channels + beyond 1024 event channels for 32-bit guests and 4096 for + 64-bit guests. + + If unsure, say Y. + config PDX_COMPRESSION bool "PDX (Page inDeX) compression" if EXPERT && !X86 && !RISCV default ARM || PPC diff --git a/xen/common/Makefile b/xen/common/Makefile index ac23120d7d..9da8a7244d 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -13,7 +13,7 @@ obj-$(CONFIG_IOREQ_SERVER) += dm.o obj-y += domain.o obj-y += event_2l.o obj-y += event_channel.o -obj-y += event_fifo.o +obj-$(CONFIG_EVTCHN_FIFO) += event_fifo.o obj-$(CONFIG_GRANT_TABLE) += grant_table.o obj-y += guestcopy.o obj-y += gzip/ diff --git a/xen/common/event_channel.h b/xen/common/event_channel.h index 45219ca67c..a778ae775b 100644 --- a/xen/common/event_channel.h +++ b/xen/common/event_channel.h @@ -45,12 +45,27 @@ void evtchn_2l_init(struct domain *d); /* FIFO */ +#ifdef CONFIG_EVTCHN_FIFO struct evtchn_init_control; struct evtchn_expand_array; int evtchn_fifo_init_control(struct evtchn_init_control *init_control); int evtchn_fifo_expand_array(const struct evtchn_expand_array *expand_array); void evtchn_fifo_destroy(struct domain *d); +#else +static inline int evtchn_fifo_init_control(struct evtchn_init_control *init_control) +{ + return -EOPNOTSUPP; +} +static inline int evtchn_fifo_expand_array(const struct evtchn_expand_array *expand_array) +{ + return -EOPNOTSUPP; +} +static inline void evtchn_fifo_destroy(struct domain *d) +{ + return; +} +#endif /* CONFIG_EVTCHN_FIFO */ /* * Local variables:
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