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authorZhao Yakui <yakui.zhao@intel.com>2008-12-17 03:55:18 -0500
committerLen Brown <len.brown@intel.com>2009-01-09 01:41:58 -0500
commit237889bf0a62f1399fb2ba0c2a259e6a96597131 (patch)
tree248d6bf6e4e60c8760b9a2b6ba2e788b70e24c76 /arch/x86/kernel/acpi
parent13b40a1a065824d2d4e55c8b48ea9f3f9d162929 (diff)
ACPI : Use RSDT instead of XSDT by adding boot option of "acpi=rsdt"
On some boxes there exist both RSDT and XSDT table. But unfortunately sometimes there exists the following error when XSDT table is used: a. 32/64X address mismatch b. The 32/64X FACS address mismatch In such case the boot option of "acpi=rsdt" is provided so that RSDT is tried instead of XSDT table when the system can't work well. http://bugzilla.kernel.org/show_bug.cgi?id=8246 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> cc:Thomas Renninger <trenn@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/x86/kernel/acpi')
-rw-r--r--arch/x86/kernel/acpi/boot.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 4c51a2f8fd31..db1a90a76b3e 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -47,7 +47,7 @@
47#endif 47#endif
48 48
49static int __initdata acpi_force = 0; 49static int __initdata acpi_force = 0;
50 50u32 acpi_rsdt_forced;
51#ifdef CONFIG_ACPI 51#ifdef CONFIG_ACPI
52int acpi_disabled = 0; 52int acpi_disabled = 0;
53#else 53#else
@@ -1783,6 +1783,10 @@ static int __init parse_acpi(char *arg)
1783 disable_acpi(); 1783 disable_acpi();
1784 acpi_ht = 1; 1784 acpi_ht = 1;
1785 } 1785 }
1786 /* acpi=rsdt use RSDT instead of XSDT */
1787 else if (strcmp(arg, "rsdt") == 0) {
1788 acpi_rsdt_forced = 1;
1789 }
1786 /* "acpi=noirq" disables ACPI interrupt routing */ 1790 /* "acpi=noirq" disables ACPI interrupt routing */
1787 else if (strcmp(arg, "noirq") == 0) { 1791 else if (strcmp(arg, "noirq") == 0) {
1788 acpi_noirq_set(); 1792 acpi_noirq_set();