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authorAndi Kleen <ak@suse.de>2006-08-30 13:37:15 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-30 19:05:16 -0400
commit40dd2d20f220eda1cd0da8ea3f0f9db8971ba237 (patch)
treeaea5d128ef6ce5bc16f18502f4d6745268344731 /arch/i386
parent8c74932779fc6f61b4c30145863a17125c1a296c (diff)
[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')
-rw-r--r--arch/i386/pci/common.c5
-rw-r--r--arch/i386/pci/mmconfig.c25
-rw-r--r--arch/i386/pci/pci.h3
3 files changed, 31 insertions, 2 deletions
diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index 0a362e3aeac5..1220dd828ce3 100644
--- a/arch/i386/pci/common.c
+++ b/arch/i386/pci/common.c
@@ -237,6 +237,11 @@ char * __devinit pcibios_setup(char *str)
237 pci_probe &= ~PCI_PROBE_MMCONF; 237 pci_probe &= ~PCI_PROBE_MMCONF;
238 return NULL; 238 return NULL;
239 } 239 }
240 /* override DMI blacklist */
241 else if (!strcmp(str, "mmconf")) {
242 pci_probe |= PCI_PROBE_MMCONF_FORCE;
243 return NULL;
244 }
240#endif 245#endif
241 else if (!strcmp(str, "noacpi")) { 246 else if (!strcmp(str, "noacpi")) {
242 acpi_noirq_set(); 247 acpi_noirq_set();
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 @@
12#include <linux/pci.h> 12#include <linux/pci.h>
13#include <linux/init.h> 13#include <linux/init.h>
14#include <linux/acpi.h> 14#include <linux/acpi.h>
15#include <linux/dmi.h>
15#include <asm/e820.h> 16#include <asm/e820.h>
16#include "pci.h" 17#include "pci.h"
17 18
@@ -187,9 +188,31 @@ static __init void unreachable_devices(void)
187 } 188 }
188} 189}
189 190
191static int disable_mcfg(struct dmi_system_id *d)
192{
193 printk("PCI: %s detected. Disabling MCFG.\n", d->ident);
194 pci_probe &= ~PCI_PROBE_MMCONF;
195 return 0;
196}
197
198static struct dmi_system_id __initdata dmi_bad_mcfg[] = {
199 /* Has broken MCFG table that makes the system hang when used */
200 {
201 .callback = disable_mcfg,
202 .ident = "Intel D3C5105 SDV",
203 .matches = {
204 DMI_MATCH(DMI_BIOS_VENDOR, "Intel"),
205 DMI_MATCH(DMI_BOARD_NAME, "D26928"),
206 },
207 },
208 {}
209};
210
190void __init pci_mmcfg_init(void) 211void __init pci_mmcfg_init(void)
191{ 212{
192 if ((pci_probe & PCI_PROBE_MMCONF) == 0) 213 dmi_check_system(dmi_bad_mcfg);
214
215 if ((pci_probe & (PCI_PROBE_MMCONF_FORCE|PCI_PROBE_MMCONF)) == 0)
193 return; 216 return;
194 217
195 acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg); 218 acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
diff --git a/arch/i386/pci/pci.h b/arch/i386/pci/pci.h
index bf4e79335388..49a849b3a241 100644
--- a/arch/i386/pci/pci.h
+++ b/arch/i386/pci/pci.h
@@ -16,7 +16,8 @@
16#define PCI_PROBE_CONF1 0x0002 16#define PCI_PROBE_CONF1 0x0002
17#define PCI_PROBE_CONF2 0x0004 17#define PCI_PROBE_CONF2 0x0004
18#define PCI_PROBE_MMCONF 0x0008 18#define PCI_PROBE_MMCONF 0x0008
19#define PCI_PROBE_MASK 0x000f 19#define PCI_PROBE_MMCONF_FORCE 0x0010
20#define PCI_PROBE_MASK 0x00ff
20 21
21#define PCI_NO_SORT 0x0100 22#define PCI_NO_SORT 0x0100
22#define PCI_BIOS_SORT 0x0200 23#define PCI_BIOS_SORT 0x0200