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authorAndi Kleen <ak@suse.de>2006-08-30 19:37:15 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-30 16:05:16 -0700
commit40dd2d20f220eda1cd0da8ea3f0f9db8971ba237 (patch)
treeaea5d128ef6ce5bc16f18502f4d6745268344731 /arch/i386/pci/mmconfig.c
parent8c74932779fc6f61b4c30145863a17125c1a296c (diff)
downloadblackbird-op-linux-40dd2d20f220eda1cd0da8ea3f0f9db8971ba237.tar.gz
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[PATCH] x86: Disable MMCONFIG on Intel SDV using DMI blacklist
As a replacement for the earlier removal of the e820 MCFG check we blacklist the Intel SDV with the original BIOS bug that motivated that check. On those machines don't use MMCONFIG. This also adds a new pci=mmconf parameter to override the blacklist. Cc: Greg KH <gregkh@suse.de> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/pci/mmconfig.c')
-rw-r--r--arch/i386/pci/mmconfig.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c
index 5effb2e663ed..ef5a2faa7d82 100644
--- a/arch/i386/pci/mmconfig.c
+++ b/arch/i386/pci/mmconfig.c
@@ -12,6 +12,7 @@
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/acpi.h>
+#include <linux/dmi.h>
#include <asm/e820.h>
#include "pci.h"
@@ -187,9 +188,31 @@ 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)
{
- if ((pci_probe & PCI_PROBE_MMCONF) == 0)
+ dmi_check_system(dmi_bad_mcfg);
+
+ if ((pci_probe & (PCI_PROBE_MMCONF_FORCE|PCI_PROBE_MMCONF)) == 0)
return;
acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
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