Paul Durrant 32d0b7be68 xen-bus/block: explicitly assign event channels to an AioContext ... It is not safe to close an event channel from the QEMU main thread when that channel's poller is running in IOThread context. This patch adds a new xen_device_set_event_channel_context() function to explicitly assign the channel AioContext, and modifies xen_device_bind_event_channel() to initially assign the channel's poller to the QEMU main thread context. The code in xen-block's dataplane is then modified to assign the channel to IOThread context during xen_block_dataplane_start() and de-assign it during in xen_block_dataplane_stop(), such that the channel is always assigned back to main thread context before it is closed. aio_set_fd_handler() already deals with all the necessary synchronization when moving an fd between AioContext-s so no extra code is needed to manage this. Reported-by: Julien Grall <jgrall@amazon.com> Signed-off-by: Paul Durrant <pdurrant@amazon.com> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> Message-Id: <20191216143451.19024-1-pdurrant@amazon.com> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>		2020-02-27 11:50:30 +00:00
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Makefile.objs	xen: add a mechanism to automatically create XenDevice-s...	2019-01-14 13:45:40 +00:00
trace-events	xen: perform XenDevice clean-up in XenBus watch handler	2019-09-24 12:18:47 +01:00
xen_devconfig.c	Include sysemu/sysemu.h a lot less	2019-08-16 13:31:53 +02:00
xen_pt_config_init.c	xen: re-name XenDevice to XenLegacyDevice...	2019-01-14 13:45:40 +00:00
xen_pt_graphics.c	Avoid cpu_physical_memory_rw() with a constant is_write argument	2020-02-20 14:47:08 +01:00
xen_pt_load_rom.c	hw/xen/xen_pt_load_rom: Remove unused includes	2020-02-27 11:50:30 +00:00
xen_pt_msi.c	xen: re-name XenDevice to XenLegacyDevice...	2019-01-14 13:45:40 +00:00
xen_pt.c	qdev: set properties with device_class_set_props()	2020-01-24 20:59:15 +01:00
xen_pt.h	Include qemu-common.h exactly where needed	2019-06-12 13:20:20 +02:00
xen_pvdev.c	Include qemu/main-loop.h less	2019-08-16 13:31:52 +02:00
xen-backend.c	xen: add a mechanism to automatically create XenDevice-s...	2019-01-14 13:45:40 +00:00
xen-bus-helper.c	Include hw/hw.h exactly where needed	2019-08-16 13:31:52 +02:00
xen-bus.c	xen-bus/block: explicitly assign event channels to an AioContext	2020-02-27 11:50:30 +00:00
xen-common.c	xen: convert "-machine igd-passthru" to an accelerator property	2019-12-17 19:32:27 +01:00
xen-host-pci-device.c	Include qemu-common.h exactly where needed	2019-06-12 13:20:20 +02:00
xen-host-pci-device.h	Clean up decorations and whitespace around header guards	2016-07-12 16:20:46 +02:00
xen-legacy-backend.c	qdev: set properties with device_class_set_props()	2020-01-24 20:59:15 +01:00