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q35: make pci window address/size match guest cfg

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For Q35, MMCFG address and size are guest configurable.
Update w32 property to make it behave accordingly.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-09-01 13:26:03 +03:00
parent 2d1fe1873a
commit 636228a887
1 changed files with 10 additions and 0 deletions
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10
hw/pci-host/q35.c
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@ -214,6 +214,16 @@ static void mch_update_pciexbar(MCHPCIState *mch)
} }
addr = pciexbar & addr_mask; addr = pciexbar & addr_mask;
pcie_host_mmcfg_update(pehb, enable, addr, length); pcie_host_mmcfg_update(pehb, enable, addr, length);
/* Leave enough space for the MCFG BAR */
/*
* TODO: this matches current bios behaviour, but it's not a power of two,
* which means an MTRR can't cover it exactly.
*/
if (enable) {
mch->pci_info.w32.begin = addr + length;
} else {
mch->pci_info.w32.begin = MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT;
}
} }
/* PAM */ /* PAM */