Chuck Tuffli 961be12f6a bhyve: fix NVMe emulation missed interrupts ... The bhyve NVMe emulation has a race in the logic which generates command completion interrupts. On FreeBSD guests, this manifests as kernel log messages similar to: nvme0: Missing interrupt The NVMe emulation code sets a per-submission queue "busy" flag while processing the submission queue, and only generates an interrupt when the submission queue is not busy. Aside from being counter to the NVMe design (i.e. interrupt properties are tied to the completion queue) and adding complexity (e.g. exceptions to not generating an interrupt when "busy"), it causes a race condition under the following conditions: - guest OS has no outstanding interrupts - guest OS submits a single NVMe IO command - bhyve emulation processes the SQ and sets the "busy" flag - bhyve emulation submits the asynchronous IO to the backing storage - IO request to the backing storage completes before the SQ processing loop exits and doesn't generate an interrupt because the SQ is "busy" - bhyve emulation finishes processing the SQ and clears the "busy" flag Fix is to remove the "busy" flag and generate an interrupt when the CQ head and tail pointers do not match. Reported by: khng300 Reviewed by: jhb, imp Approved by: jhb (maintainer) MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D24082		2020-03-27 15:28:22 +00:00
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acpi.c	Catch up with ACPICA 20191018.	2019-10-24 22:33:46 +00:00
acpi.h
ahci.h
atkbdc.c
atkbdc.h
audio.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
audio.h	Add SPDX tags to bhyve(8) HD Audio device.	2019-06-25 06:24:56 +00:00
bhyve.8	Support software breakpoints in the debug server on Intel CPUs.	2019-12-13 19:21:58 +00:00
bhyvegc.c
bhyvegc.h
bhyverun.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
bhyverun.h	Make bhyve SMBIOS table topology aware	2019-04-25 22:53:55 +00:00
block_if.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
block_if.h	Increase the VirtIO segment count to support modern Windows guests.	2019-05-02 22:46:37 +00:00
bootrom.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
bootrom.h
console.c
console.h
consport.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
dbgport.c
dbgport.h
debug.h	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
fwctl.c
fwctl.h
gdb.c	Support software breakpoints in the debug server on Intel CPUs.	2019-12-13 19:21:58 +00:00
gdb.h	Support software breakpoints in the debug server on Intel CPUs.	2019-12-13 19:21:58 +00:00
hda_codec.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
hda_reg.h	Add SPDX tags to bhyve(8) HD Audio device.	2019-06-25 06:24:56 +00:00
hdac_reg.h	Add SPDX tags to bhyve(8) HD Audio device.	2019-06-25 06:24:56 +00:00
inout.c
inout.h
ioapic.c
ioapic.h
iov.c	bhyve: enable virtio-net mergeable rx buffers for tap(4)	2020-02-20 21:07:23 +00:00
iov.h	bhyve: enable virtio-net mergeable rx buffers for tap(4)	2020-02-20 21:07:23 +00:00
Makefile	bhyve: abstraction for network backends	2019-07-07 12:15:24 +00:00
Makefile.depend	Update Makefile.depend files	2019-12-11 17:37:53 +00:00
Makefile.depend.options	Add Makefile.depend.options	2019-12-11 17:37:37 +00:00
mem.c	Add support for writing to guest memory in the debug server.	2019-05-24 00:34:13 +00:00
mem.h	Add support for writing to guest memory in the debug server.	2019-05-24 00:34:13 +00:00
mevent_test.c
mevent.c	bhyve: rework mevent processing to fix a race condition	2019-11-12 21:07:51 +00:00
mevent.h	bhyve: add backend rx backpressure to virtio-net	2019-11-03 19:02:32 +00:00
mptbl.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
mptbl.h
net_backends.c	bhyve: enable virtio-net mergeable rx buffers for tap(4)	2020-02-20 21:07:23 +00:00
net_backends.h	bhyve: enable virtio-net mergeable rx buffers for tap(4)	2020-02-20 21:07:23 +00:00
net_utils.c	bhyve: move virtio-net header processing to pci_virtio_net	2020-02-12 22:44:18 +00:00
net_utils.h	bhyve: add missing license identifiers in net_utils and net_backend	2019-07-09 22:04:33 +00:00
pci_ahci.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_e82545.c	bhyve: move virtio-net header processing to pci_virtio_net	2020-02-12 22:44:18 +00:00
pci_emul.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_emul.h	Keep the shadow PCIR_COMMAND synced with the real one for pass through.	2019-06-07 15:53:27 +00:00
pci_fbuf.c	Bhyve: DPRINTF already includes newline, so don't add another	2020-03-18 03:15:57 +00:00
pci_hda.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_hda.h	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_hostbridge.c
pci_irq.c
pci_irq.h
pci_lpc.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_lpc.h
pci_nvme.c	bhyve: fix NVMe emulation missed interrupts	2020-03-27 15:28:22 +00:00
pci_passthru.c	Emulate reads of the PCI command register for passthrough devices.	2019-12-11 23:41:39 +00:00
pci_uart.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_virtio_block.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_virtio_console.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_virtio_net.c	bhyve: enable virtio-net mergeable rx buffers for tap(4)	2020-02-20 21:07:23 +00:00
pci_virtio_rnd.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_virtio_scsi.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_xhci.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
pci_xhci.h
pm.c
post.c
ps2kbd.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
ps2kbd.h
ps2mouse.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
ps2mouse.h
rfb.c	Bhyve: log message when rfb client connects	2020-03-18 03:17:15 +00:00
rfb.h
rtc.c
rtc.h
smbiostbl.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
smbiostbl.h
sockstream.c
sockstream.h
spinup_ap.c
spinup_ap.h
task_switch.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
uart_emul.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
uart_emul.h
usb_emul.c
usb_emul.h
usb_mouse.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
vga.c
vga.h
virtio.c	bhyve: add wrapper for debug printf statements	2020-01-08 22:55:22 +00:00
virtio.h	bhyve: add support for virtio-net mergeable rx buffers	2019-11-08 17:57:03 +00:00
xmsr.c	bhyve, bhyvectl: Add Hygon Dhyana support.	2020-02-13 19:05:14 +00:00
xmsr.h