From 5f0b2976cb2b62668a076f54419c24b8ab677167 Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Mon, 14 Apr 2008 16:08:25 -0700 Subject: x86: add pci=check_enable_amd_mmconf and dmi check so will disable that feature by default, and only enable that via pci=check_enable_amd_mmconf or for system match with dmi table. Signed-off-by: Yinghai Lu Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/pci/common.c | 4 ++++ arch/x86/pci/mmconfig-shared.c | 3 +++ arch/x86/pci/pci.h | 1 + 3 files changed, 8 insertions(+) (limited to 'arch/x86/pci') diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 07d53184f7a..2a4d751818b 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -425,6 +425,10 @@ char * __devinit pcibios_setup(char *str) pci_probe &= ~PCI_PROBE_MMCONF; return NULL; } + else if (!strcmp(str, "check_enable_amd_mmconf")) { + pci_probe |= PCI_CHECK_ENABLE_AMD_MMCONF; + return NULL; + } #endif else if (!strcmp(str, "noacpi")) { acpi_noirq_set(); diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c index bdf62243186..0cfebecf2a8 100644 --- a/arch/x86/pci/mmconfig-shared.c +++ b/arch/x86/pci/mmconfig-shared.c @@ -107,6 +107,9 @@ static const char __init *pci_mmcfg_amd_fam10h(void) int i; unsigned segnbits = 0, busnbits; + if (!(pci_probe & PCI_CHECK_ENABLE_AMD_MMCONF)) + return NULL; + address = MSR_FAM10H_MMIO_CONF_BASE; if (rdmsr_safe(address, &low, &high)) return NULL; diff --git a/arch/x86/pci/pci.h b/arch/x86/pci/pci.h index c8b89a832c6..8ef86b5c37c 100644 --- a/arch/x86/pci/pci.h +++ b/arch/x86/pci/pci.h @@ -26,6 +26,7 @@ #define PCI_ASSIGN_ALL_BUSSES 0x4000 #define PCI_CAN_SKIP_ISA_ALIGN 0x8000 #define PCI_USE__CRS 0x10000 +#define PCI_CHECK_ENABLE_AMD_MMCONF 0x20000 extern unsigned int pci_probe; extern unsigned long pirq_table_addr; -- cgit v1.2.3