diff mbox

x86 pci: select direct access mode for mmconfig option

Message ID 1306479579.15392.40.camel@sli10-conroe (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Shaohua Li May 27, 2011, 6:59 a.m. UTC
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)
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>



--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 880fcb6..90e50d9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1907,7 +1907,7 @@  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