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| author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2017-08-07 18:45:13 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-09-08 16:15:17 +0300 |
| commit | c8389550dedc65892fba9c3df29423efd802f544 (patch) | |
| tree | d12800e551f692de580758a48d4709239acaa994 /hw/core/loader.c | |
| parent | 672339f7eff5e9226f302037290e84e783d2b5cd (diff) | |
| download | focaccia-qemu-c8389550dedc65892fba9c3df29423efd802f544.tar.gz focaccia-qemu-c8389550dedc65892fba9c3df29423efd802f544.zip | |
vmgenid: replace x-write-pointer-available hack
This compat property sole function is to prevent the device from being instantiated. Instead of requiring an extra compat property, check if fw_cfg has DMA enabled. fw_cfg is a built-in device that is initialized very early by the machine init code. We have at least one other device that also assumes fw_cfg_find() can be safely used on realize: pvpanic. This has the additional benefit of handling other cases properly, like: $ qemu-system-x86_64 -device vmgenid -machine none qemu-system-x86_64: -device vmgenid: vmgenid requires DMA write support in fw_cfg, which this machine type does not provide $ qemu-system-x86_64 -device vmgenid -machine pc-i440fx-2.9 -global fw_cfg.dma_enabled=off qemu-system-x86_64: -device vmgenid: vmgenid requires DMA write support in fw_cfg, which this machine type does not provide $ qemu-system-x86_64 -device vmgenid -machine pc-i440fx-2.6 -global fw_cfg.dma_enabled=on [boots normally] Suggested-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Ben Warren <ben@skyportsystems.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/core/loader.c')
0 files changed, 0 insertions, 0 deletions