b430b51395
Currently, when using "nvme://" for a block device, like
-drive file=nvme://0000:01:00.0/1,if=none,id=drive0 \
-device virtio-blk,drive=drive0 \
VFIO may pin all guest memory, and discarding of RAM no longer works as
expected. I was able to reproduce this easily with my
01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd
NVMe SSD Controller SM981/PM981/PM983
Similar to common VFIO, we have to disable it, making sure that:
a) virtio-balloon won't discard any memory ("silently disabled")
b) virtio-mem and nvme:// run mutually exclusive
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20201116105947.9194-1-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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| .. | ||
| arch_type.c | ||
| bdrv-next-monitor-owned.c | ||
| blk-commit-all.c | ||
| blk-exp-close-all.c | ||
| blockdev-close-all-bdrv-states.c | ||
| change-state-handler.c | ||
| cmos.c | ||
| cpu-get-clock.c | ||
| cpu-synchronize-state.c | ||
| cpus-get-virtual-clock.c | ||
| dump.c | ||
| error-printf.c | ||
| fdset.c | ||
| fw_cfg.c | ||
| gdbstub.c | ||
| get-vm-name.c | ||
| icount.c | ||
| io_uring.c | ||
| iothread-lock.c | ||
| iothread.c | ||
| is-daemonized.c | ||
| isa-bus.c | ||
| linux-aio.c | ||
| machine-init-done.c | ||
| meson.build | ||
| migr-blocker.c | ||
| monitor-core.c | ||
| monitor.c | ||
| pci-bus.c | ||
| pci-host-piix.c | ||
| qemu-timer-notify-cb.c | ||
| qmp_memory_device.c | ||
| qtest.c | ||
| ram-block.c | ||
| ramfb.c | ||
| replay-tools.c | ||
| replay.c | ||
| runstate-check.c | ||
| semihost.c | ||
| set-fd-handler.c | ||
| sysbus.c | ||
| target-get-monitor-def.c | ||
| target-monitor-defs.c | ||
| tpm.c | ||
| trace-control.c | ||
| uuid.c | ||
| vm-stop.c | ||
| vmgenid.c | ||
| vmstate.c | ||
| win32-kbd-hook.c | ||
| xen-hw-stub.c | ||