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x86/PCI: select direct access mode for mmconfig option 

Direct access is needed in mmconf mode too. There are two reasons:
1. we need it to access first 256 bytes. We have bug before that
   using mmconf to access pci config space hangs system (when
   resizing BARs), so we use type1 config for legacy config space.
2. when doing mmconfg bar checking, we need access ACPI _CRS,
   which might access PCI config space.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Shaohua Li 2011-05-27 14:59:39 +08:00 committed by Jesse Barnes
parent efe6d7272b
commit 0aba496fc8
1 changed files with 1 additions and 1 deletions
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arch/x86/Kconfig
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@ -1905,7 +1905,7 @@ config PCI_BIOS
# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
config PCI_DIRECT
def_bool y
depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC))
depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG))
config PCI_MMCONFIG
def_bool y