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pci: add romsize property

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This property can be useful for distros to set up known-good ROM sizes for
migration purposes.  The VM will fail to start if the ROM is too large,
and migration compatibility will not be broken if the ROM is too small.

Note that even though romsize is a uint32_t, it has to be between 1
(because empty ROM files are not accepted, and romsize must be greater
than the file) and 2^31 (because values above are not powers of two and
are rejected).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <20201218182736.1634344-1-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210203131828.156467-3-pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-02-03 14:18:28 +01:00 • committed by Michael S. Tsirkin
parent 7c16b5bbb6
commit 08b1df8ff4
3 changed files with 30 additions and 4 deletions
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1
include/hw/pci/pci.h
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@ -344,6 +344,7 @@ struct PCIDevice {
/* Location of option rom */
char *romfile;
uint32_t romsize;
bool has_rom;
MemoryRegion rom;
uint32_t rom_bar;