119 lines
3.4 KiB
Diff
119 lines
3.4 KiB
Diff
From: Thomas Renninger <trenn@suse.de>
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Subject: Introduce acpi_root_table=rsdt boot param and dmi list to force rsdt
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Patch-mainline: not yet
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References: http://bugzilla.kernel.org/show_bug.cgi?id=8246
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This one is part of a patch series:
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acpi_thinkpad_introduce_acpi_root_table_boot_param.patch
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acpi_thinkpad_introduce_acpica_rsdt_global_variable.patch
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acpi_thinkpad_remove_R40e_c-state_blacklist.patch
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Blacklist R40e, R51e and T40, T40p, T41, T41p, T42, T42p, R50 and R50p
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ThinkPads to use the RSDT instead of the XSDT.
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Update: Jan 12 2009 jeffm
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* 2.6.29-rc1 introduced acpi_rsdt_forced. I've updated the patch to issue
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a warning that acpi=rsdt is the prefered method of forcing.
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* Moved the dmi table stuff to the main dmi table in x86/kernel/acpi/boot.
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Update: Apr 10 2009 jeffm
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* Removed documentation, since it's deprecated.
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Signed-off-by: Thomas Renninger <trenn@suse.de>
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Tested-by: Mark Doughty <me@markdoughty.co.uk>
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CC: Yakui Zhao <yakui.zhao@intel.com>
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---
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arch/x86/kernel/acpi/boot.c | 53 ++++++++++++++++++++++++++++++++++++++++++++
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drivers/acpi/tables.c | 3 ++
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2 files changed, 56 insertions(+)
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--- a/arch/x86/kernel/acpi/boot.c
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+++ b/arch/x86/kernel/acpi/boot.c
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@@ -1313,6 +1313,21 @@ static int __init dmi_ignore_irq0_timer_
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return 0;
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}
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+static int __init force_acpi_rsdt(const struct dmi_system_id *d)
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+{
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+ if (!acpi_force) {
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+ printk(KERN_NOTICE "%s detected: force use of acpi=rsdt\n",
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+ d->ident);
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+ acpi_rsdt_forced = 1;
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+ } else {
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+ printk(KERN_NOTICE
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+ "Warning: acpi=force overrules DMI blacklist: "
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+ "acpi=rsdt\n");
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+ }
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+ return 0;
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+
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+}
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+
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/*
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* If your system is blacklisted here, but you find that acpi=force
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* works for you, please contact linux-acpi@vger.kernel.org
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@@ -1388,6 +1403,32 @@ static struct dmi_system_id __initdata a
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DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
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},
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},
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+
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+ /*
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+ * Boxes that need RSDT as ACPI root table
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+ */
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+ {
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+ .callback = force_acpi_rsdt,
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+ .ident = "ThinkPad ", /* R40e, broken C-states */
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+ .matches = {
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+ DMI_MATCH(DMI_BIOS_VENDOR, "IBM"),
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+ DMI_MATCH(DMI_BIOS_VERSION, "1SET")},
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+ },
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+ {
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+ .callback = force_acpi_rsdt,
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+ .ident = "ThinkPad ", /* R50e, slow booting */
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+ .matches = {
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+ DMI_MATCH(DMI_BIOS_VENDOR, "IBM"),
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+ DMI_MATCH(DMI_BIOS_VERSION, "1WET")},
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+ },
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+ {
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+ .callback = force_acpi_rsdt,
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+ .ident = "ThinkPad ", /* T40, T40p, T41, T41p, T42, T42p
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+ R50, R50p */
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+ .matches = {
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+ DMI_MATCH(DMI_BIOS_VENDOR, "IBM"),
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+ DMI_MATCH(DMI_BIOS_VERSION, "1RET")},
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+ },
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{}
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};
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@@ -1583,6 +1624,18 @@ static int __init parse_acpi(char *arg)
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}
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early_param("acpi", parse_acpi);
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+/* Alias for acpi=rsdt for compatibility with openSUSE 11.1 and SLE11 */
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+static int __init parse_acpi_root_table(char *opt)
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+{
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+ if (!strcmp(opt, "rsdt")) {
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+ acpi_rsdt_forced = 1;
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+ printk(KERN_WARNING "acpi_root_table=rsdt is deprecated. "
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+ "Please use acpi=rsdt instead.\n");
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+ }
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+ return 0;
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+}
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+early_param("acpi_root_table", parse_acpi_root_table);
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+
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/* FIXME: Using pci= for an ACPI parameter is a travesty. */
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static int __init parse_pci(char *arg)
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{
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--- a/drivers/acpi/tables.c
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+++ b/drivers/acpi/tables.c
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@@ -339,6 +339,9 @@ int __init acpi_table_init(void)
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{
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acpi_status status;
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+ if (acpi_rsdt_forced)
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+ printk(KERN_INFO "Using RSDT as ACPI root table\n");
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+
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status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
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if (ACPI_FAILURE(status))
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return 1;
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