On Wed, 4 Sep 2013 13:48:29 +0300
"Michael S. Tsirkin" <m...@redhat.com> wrote:
> For Q35, MMCFG address and size are guest configurable.
> Update w32 property to make it behave accordingly.
>
> Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
> ---
> hw/pci-host/q35.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
> index 4febd24..3f1d447 100644
> --- a/hw/pci-host/q35.c
> +++ b/hw/pci-host/q35.c
> @@ -214,6 +214,16 @@ static void mch_update_pciexbar(MCHPCIState *mch)
> }
> addr = pciexbar & addr_mask;
> 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;
> + }
> }
I probably miss something but where is remapping in system address space?
If there is none then, then updated w32 might mismatch actually/initially
mapped alias.
> /* PAM */
