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hw/gen_pcie_root_port: make IO RO 0 on IO disabled 

IO_LIMIT and IO_BASE registers should not be writable if
gen_pcie_root_port's io-reserve property is set to 0.
The COMMAND register should have the IO flag read only.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marcel Apfelbaum 2017-10-02 13:31:35 +03:00 committed by Michael S. Tsirkin
parent 2fefa16cec
commit 8e36c336d9
1 changed files with 7 additions and 0 deletions
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7
hw/pci-bridge/gen_pcie_root_port.c
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@ -85,6 +85,13 @@ static void gen_rp_realize(DeviceState *dev, Error **errp)
rpc->parent_class.exit(d); rpc->parent_class.exit(d);
return; return;
} }
if (!grp->io_reserve) {
pci_word_test_and_clear_mask(d->wmask + PCI_COMMAND,
PCI_COMMAND_IO);
d->wmask[PCI_IO_BASE] = 0;
d->wmask[PCI_IO_LIMIT] = 0;
}
} }
static const VMStateDescription vmstate_rp_dev = { static const VMStateDescription vmstate_rp_dev = {