Messages in this thread Patch in this message | | | Date | Wed, 25 Jun 2003 21:20:51 +0100 (BST) | From | Hugh Dickins <> | Subject | [PATCH 2.4] ACPI_HT_ONLY acpismp=force |
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What's the point of bootparam "acpismp=force"? A way to change your mind if you just said "acpi=off"? A hurdle to jump to get CONFIG_ACPI_HT_ONLY to do what you ask? 2.4.18 used to need it to enable HT, but not recent releases. It can't configure in what's not there, and now serves only to confuse: kill it.
2.4.22-bk already has a cset to call acpi_boot_init in the CONFIG_ACPI_HT_ONLY case. But allow "acpi=off" to disable that; and let acpi_disabled be 1 if CONFIG_ACPI is not defined.
Sorry, bootparam "noht" remains broken: it's currently a way of erasing the "ht" flag from cpuinfo, and setting smp_num_siblings to 1 even when it should say 2. Please, someone who knows their way around the ACPI table handling fix it (it should be selecting one from each pair in either acpi_boot_init), or else we just remove it.
--- 2.4.22-bk/Documentation/Configure.help Wed Jun 25 14:00:53 2003 +++ linux/Documentation/Configure.help Wed Jun 25 20:27:12 2003 @@ -18638,9 +18638,6 @@ Full ACPI support (CONFIG_ACPI) is preferred. Use this option only if you wish to limit ACPI's role to processor enumeration. - In this configuration, ACPI defaults to off. It must be enabled - on the command-line with the "acpismp=force" option. - Enable ACPI 2.0 with errata 1.3 CONFIG_ACPI20 Enable support for the 2.0 version of the ACPI interpreter. See the --- 2.4.22-bk/Documentation/kernel-parameters.txt Fri Jun 20 23:53:32 2003 +++ linux/Documentation/kernel-parameters.txt Wed Jun 25 20:27:12 2003 @@ -70,8 +70,6 @@ acpi= [HW,ACPI] Advanced Configuration and Power Interface - acpismp=force [IA-32] Early setup parse and use ACPI SMP table. - ad1816= [HW,SOUND] ad1848= [HW,SOUND] --- 2.4.22-bk/arch/i386/kernel/setup.c Wed Jun 25 14:00:53 2003 +++ linux/arch/i386/kernel/setup.c Wed Jun 25 20:27:12 2003 @@ -174,10 +174,10 @@ static int disable_x86_ht __initdata = 0; static u32 disabled_x86_caps[NCAPINTS] __initdata = { 0 }; -#ifdef CONFIG_ACPI_HT_ONLY -int acpi_disabled __initdata = 1; -#else +#ifdef CONFIG_ACPI int acpi_disabled __initdata = 0; +#else +int acpi_disabled __initdata = 1; #endif extern int blk_nohighio; @@ -811,10 +811,6 @@ else if (!memcmp(from, "acpi=off", 8)) acpi_disabled = 1; - /* "acpismp=force" turns on ACPI again */ - else if (!memcmp(from, "acpismp=force", 13)) - acpi_disabled = 0; - /* * highmem=size forces highmem to be exactly 'size' bytes. * This works even on boxes that have no highmem otherwise. @@ -1163,13 +1159,16 @@ smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ #endif paging_init(); -#ifdef CONFIG_ACPI +#if defined(CONFIG_ACPI_BOOT) || defined(CONFIG_ACPI_HT_ONLY) /* * Parse the ACPI tables for possible boot-time SMP configuration. */ if (!acpi_disabled) acpi_boot_init(); #endif +#ifdef CONFIG_ACPI_HT_ONLY + acpi_disabled = 1; +#endif #ifdef CONFIG_X86_LOCAL_APIC /* * get boot-time SMP configuration: --- 2.4.22-bk/include/linux/acpi.h Mon Jun 23 14:51:54 2003 +++ linux/include/linux/acpi.h Wed Jun 25 20:27:12 2003 @@ -37,7 +37,7 @@ #include <asm/acpi.h> -#ifdef CONFIG_ACPI_BOOT +#ifdef CONFIG_ACPI enum acpi_irq_model_id { ACPI_IRQ_MODEL_PIC = 0, - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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