diff options
Diffstat (limited to 'arch/x86_64/pci/mmconfig.c')
| -rw-r--r-- | arch/x86_64/pci/mmconfig.c | 34 |
1 files changed, 10 insertions, 24 deletions
diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c index 2d48a7941d4..3c55c76c6fd 100644 --- a/arch/x86_64/pci/mmconfig.c +++ b/arch/x86_64/pci/mmconfig.c @@ -9,7 +9,6 @@ #include <linux/init.h> #include <linux/acpi.h> #include <linux/bitmap.h> -#include <linux/dmi.h> #include <asm/e820.h> #include "pci.h" @@ -165,33 +164,11 @@ static __init void unreachable_devices(void) } } -static int disable_mcfg(struct dmi_system_id *d) -{ - printk("PCI: %s detected. Disabling MCFG.\n", d->ident); - pci_probe &= ~PCI_PROBE_MMCONF; - return 0; -} - -static struct dmi_system_id __initdata dmi_bad_mcfg[] = { - /* Has broken MCFG table that makes the system hang when used */ - { - .callback = disable_mcfg, - .ident = "Intel D3C5105 SDV", - .matches = { - DMI_MATCH(DMI_BIOS_VENDOR, "Intel"), - DMI_MATCH(DMI_BOARD_NAME, "D26928"), - }, - }, - {} -}; - void __init pci_mmcfg_init(void) { int i; - dmi_check_system(dmi_bad_mcfg); - - if ((pci_probe & (PCI_PROBE_MMCONF|PCI_PROBE_MMCONF_FORCE)) == 0) + if ((pci_probe & PCI_PROBE_MMCONF) == 0) return; acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg); @@ -200,6 +177,15 @@ void __init pci_mmcfg_init(void) (pci_mmcfg_config[0].base_address == 0)) return; + if (!e820_all_mapped(pci_mmcfg_config[0].base_address, + pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN, + E820_RESERVED)) { + printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n", + pci_mmcfg_config[0].base_address); + printk(KERN_ERR "PCI: Not using MMCONFIG.\n"); + return; + } + /* RED-PEN i386 doesn't do _nocache right now */ pci_mmcfg_virt = kmalloc(sizeof(*pci_mmcfg_virt) * pci_mmcfg_config_num, GFP_KERNEL); if (pci_mmcfg_virt == NULL) { |