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Diffstat (limited to 'arch/x86_64/pci/mmconfig.c')
-rw-r--r--arch/x86_64/pci/mmconfig.c34
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) {