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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>
38 lines
554 B
C
38 lines
554 B
C
#include "qemu/osdep.h"
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#include "exec/ramlist.h"
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#include "exec/cpu-common.h"
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#include "exec/memory.h"
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void *qemu_ram_get_host_addr(RAMBlock *rb)
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{
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return 0;
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}
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ram_addr_t qemu_ram_get_offset(RAMBlock *rb)
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{
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return 0;
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}
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ram_addr_t qemu_ram_get_used_length(RAMBlock *rb)
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{
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return 0;
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}
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void ram_block_notifier_add(RAMBlockNotifier *n)
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{
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}
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void ram_block_notifier_remove(RAMBlockNotifier *n)
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{
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}
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int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
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{
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return 0;
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}
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int ram_block_discard_disable(bool state)
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{
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return 0;
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}
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