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Ignore length of resource for PCI ROM request

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Writing PCIR_BIOS is to get PCI ROM resource length. Ingore the request
as it's not support currently. Else, guest might get wrong information
about the PCI ROM resource.

Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
This commit is contained in:
Shuo Liu 2018-03-05 18:11:47 +08:00 committed by Jack Ren
parent b84aa9fc87
commit 44b0ec0413
1 changed files with 2 additions and 0 deletions
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2
devicemodel/hw/pci/core.c
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@ -1905,6 +1905,8 @@ pci_cfgrw(struct vmctx *ctx, int vcpu, int in, int bus, int slot, int func,
} }
pci_set_cfgdata32(dev, coff, bar); pci_set_cfgdata32(dev, coff, bar);
} else if (coff == PCIR_BIOS) {
/* ignore ROM BAR length request */
} else if (pci_emul_iscap(dev, coff)) { } else if (pci_emul_iscap(dev, coff)) {
pci_emul_capwrite(dev, coff, bytes, *eax); pci_emul_capwrite(dev, coff, bytes, *eax);
} else if (coff >= PCIR_COMMAND && coff < PCIR_REVID) { } else if (coff >= PCIR_COMMAND && coff < PCIR_REVID) {