1 files changed, 27 insertions, 0 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index ec7e56c1b984..3109ca37a67c 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -729,6 +729,29 @@ void start_periodic_check_for_corruption(void)
 }
 #endif
 
+static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
+{
+        printk(KERN_NOTICE
+                "%s detected: BIOS corrupts 0xc000, working it around.\n",
+                d->ident);
+
+        reserve_early(0xc000, 0xc400, "BIOS quirk");
+
+        return 0;
+}
+
+/* List of systems that have known low memory corruption BIOS problems */
+static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
+        {
+                .callback = dmi_low_memory_corruption,
+                .ident = "AMI BIOS",
+                .matches = {
+                        DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
+                },
+        },
+        {}
+};
+
 /*
  * Determine if we were loaded by an EFI loader.  If so, then we have also been
  * passed the efi memmap, systab, etc., so we should use these data structures
@@ -752,6 +775,8 @@ void __init setup_arch(char **cmdline_p)
         printk(KERN_INFO "Command line: %s\n", boot_command_line);
 #endif
 
+        dmi_check_system(bad_bios_dmi_table);
+
         early_cpu_init();
         early_ioremap_init();
 
@@ -1037,3 +1062,5 @@ void __init setup_arch(char **cmdline_p)
 #endif
 #endif
 }
+
+