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isapc: Fix non-KVM qemu boot (read/write memory for isapc BIOS)

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The isapc machine with seabios currently requires the BIOS region
to be read/write memory rather than read-only memory.

KVM currently cannot support the BIOS as a ROM region, but qemu
in non-KVM mode can. Based on this, isapc machine currently only
works with KVM.

To work-around this isapc issue, this change avoids marking the
BIOS as readonly for isapc.

This change also will allow KVM to start supporting ROM mode
via KVM_CAP_READONLY_MEM.

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1369816047-16384-2-git-send-email-jordan.l.justen@intel.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jordan Justen 2013-05-29 01:27:24 -07:00 • committed by Anthony Liguori
parent 338ea905e9
commit dade922f35
2 changed files with 16 additions and 5 deletions
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5
hw/i386/pc_piix.c
View file

@ -713,6 +713,11 @@ static QEMUMachine isapc_machine = {
.property = "rom_only",
.value = stringify(1),
},
{
.driver = "pc-sysfw",
.property = "isapc_ram_fw",
.value = stringify(1),
},
{ /* end of list */ }
},
DEFAULT_MACHINE_OPTIONS,