diff options
| -rw-r--r-- | arch/x86/kernel/setup.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 9838f2539dfc..e9fc6e931753 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -578,6 +578,29 @@ static struct x86_quirks default_x86_quirks __initdata; struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; +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 @@ -601,6 +624,8 @@ 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(); @@ -885,3 +910,5 @@ void __init setup_arch(char **cmdline_p) #endif #endif } + + |