Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[pandora-kernel.git] / arch / x86 / kernel / setup.c

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index dede5c4..9e5cdaf 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -107,11 +107,12 @@
 #include <asm/percpu.h>
 #include <asm/topology.h>
 #include <asm/apicdef.h>
-#include <asm/k8.h>
+#include <asm/amd_nb.h>
 #ifdef CONFIG_X86_64
 #include <asm/numa_64.h>
 #endif
 #include <asm/mce.h>
+#include <asm/alternative.h>
 
 /*
  * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
@@ -617,79 +618,7 @@ static __init void reserve_ibft_region(void)
                reserve_early_overlap_ok(addr, addr + size, "ibft");
 }
 
-#ifdef CONFIG_X86_RESERVE_LOW_64K
-static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
-{
-       printk(KERN_NOTICE
-               "%s detected: BIOS may corrupt low RAM, working around it.\n",
-               d->ident);
-
-       e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED);
-       sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
-
-       return 0;
-}
-#endif
-
-/* List of systems that have known low memory corruption BIOS problems */
-static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
-#ifdef CONFIG_X86_RESERVE_LOW_64K
-       {
-               .callback = dmi_low_memory_corruption,
-               .ident = "AMI BIOS",
-               .matches = {
-                       DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
-               },
-       },
-       {
-               .callback = dmi_low_memory_corruption,
-               .ident = "Phoenix BIOS",
-               .matches = {
-                       DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"),
-               },
-       },
-       {
-               .callback = dmi_low_memory_corruption,
-               .ident = "Phoenix/MSC BIOS",
-               .matches = {
-                       DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix/MSC"),
-               },
-       },
-       /*
-        * AMI BIOS with low memory corruption was found on Intel DG45ID and
-        * DG45FC boards.
-        * It has a different DMI_BIOS_VENDOR = "Intel Corp.", for now we will
-        * match only DMI_BOARD_NAME and see if there is more bad products
-        * with this vendor.
-        */
-       {
-               .callback = dmi_low_memory_corruption,
-               .ident = "AMI BIOS",
-               .matches = {
-                       DMI_MATCH(DMI_BOARD_NAME, "DG45ID"),
-               },
-       },
-       {
-               .callback = dmi_low_memory_corruption,
-               .ident = "AMI BIOS",
-               .matches = {
-                       DMI_MATCH(DMI_BOARD_NAME, "DG45FC"),
-               },
-       },
-       /*
-        * The Dell Inspiron Mini 1012 has DMI_BIOS_VENDOR = "Dell Inc.", so
-        * match on the product name.
-        */
-       {
-               .callback = dmi_low_memory_corruption,
-               .ident = "Phoenix BIOS",
-               .matches = {
-                       DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
-               },
-       },
-#endif
-       {}
-};
+static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
 
 static void __init trim_bios_range(void)
 {
@@ -697,8 +626,14 @@ static void __init trim_bios_range(void)
         * A special case is the first 4Kb of memory;
         * This is a BIOS owned area, not kernel ram, but generally
         * not listed as such in the E820 table.
+        *
+        * This typically reserves additional memory (64KiB by default)
+        * since some BIOSes are known to corrupt low memory.  See the
+        * Kconfig help text for X86_RESERVE_LOW.
         */
-       e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
+       e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE),
+                         E820_RAM, E820_RESERVED);
+
        /*
         * special case: Some BIOSen report the PC BIOS
         * area (640->1Mb) as ram even though it is not.
@@ -708,6 +643,28 @@ static void __init trim_bios_range(void)
        sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 }
 
+static int __init parse_reservelow(char *p)
+{
+       unsigned long long size;
+
+       if (!p)
+               return -EINVAL;
+
+       size = memparse(p, &p);
+
+       if (size < 4096)
+               size = 4096;
+
+       if (size > 640*1024)
+               size = 640*1024;
+
+       reserve_low = size;
+
+       return 0;
+}
+
+early_param("reservelow", parse_reservelow);
+
 /*
  * 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
@@ -725,6 +682,7 @@ void __init setup_arch(char **cmdline_p)
 {
        int acpi = 0;
        int k8 = 0;
+       unsigned long flags;
 
 #ifdef CONFIG_X86_32
        memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
@@ -862,8 +820,6 @@ void __init setup_arch(char **cmdline_p)
 
        dmi_scan_machine();
 
-       dmi_check_system(bad_bios_dmi_table);
-
        /*
         * VMware detection requires dmi to be available, so this
         * needs to be done after dmi_scan_machine, for the BP.
@@ -1013,6 +969,8 @@ void __init setup_arch(char **cmdline_p)
        paging_init();
        x86_init.paging.pagetable_setup_done(swapper_pg_dir);
 
+       setup_trampoline_page_table();
+
        tboot_probe();
 
 #ifdef CONFIG_X86_64
@@ -1068,6 +1026,10 @@ void __init setup_arch(char **cmdline_p)
        x86_init.oem.banner();
 
        mcheck_init();
+
+       local_irq_save(flags);
+       arch_init_ideal_nop5();
+       local_irq_restore(flags);
 }
 
 #ifdef CONFIG_X86_32