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authorYinghai Lu <yhlu.kernel@gmail.com>2008-04-14 16:08:25 -0700
committerIngo Molnar <mingo@elte.hu>2008-04-26 23:41:04 +0200
commit5f0b2976cb2b62668a076f54419c24b8ab677167 (patch)
treeda8439a413adf51359728208beab5ce9f6863ce5 /arch/x86/kernel/mmconf-fam10h_64.c
parente8ee6f0ae5cd860e8e6c02807edfa3c1fa01bcb5 (diff)
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 <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/mmconf-fam10h_64.c')
-rw-r--r--arch/x86/kernel/mmconf-fam10h_64.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/x86/kernel/mmconf-fam10h_64.c b/arch/x86/kernel/mmconf-fam10h_64.c
index 37897920ec65..edc5fbfe85c0 100644
--- a/arch/x86/kernel/mmconf-fam10h_64.c
+++ b/arch/x86/kernel/mmconf-fam10h_64.c
@@ -6,12 +6,15 @@
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/pci.h>
+#include <linux/dmi.h>
#include <asm/pci-direct.h>
#include <linux/sort.h>
#include <asm/io.h>
#include <asm/msr.h>
#include <asm/acpi.h>
+#include "../pci/pci.h"
+
struct pci_hostbridge_probe {
u32 bus;
u32 slot;
@@ -176,6 +179,9 @@ void __cpuinit fam10h_check_enable_mmcfg(void)
u64 val;
u32 address;
+ if (!(pci_probe & PCI_CHECK_ENABLE_AMD_MMCONF))
+ return;
+
address = MSR_FAM10H_MMIO_CONF_BASE;
rdmsrl(address, val);
@@ -213,3 +219,25 @@ void __cpuinit fam10h_check_enable_mmcfg(void)
FAM10H_MMIO_CONF_ENABLE;
wrmsrl(address, val);
}
+
+static int __devinit set_check_enable_amd_mmconf(const struct dmi_system_id *d)
+{
+ pci_probe |= PCI_CHECK_ENABLE_AMD_MMCONF;
+ return 0;
+}
+
+static struct dmi_system_id __devinitdata mmconf_dmi_table[] = {
+ {
+ .callback = set_check_enable_amd_mmconf,
+ .ident = "Sun Microsystems Machine",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sun Microsystems"),
+ },
+ },
+ {}
+};
+
+void __init check_enable_amd_mmconf_dmi(void)
+{
+ dmi_check_system(mmconf_dmi_table);
+}