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Date: Fri, 20 Jun 2008 16:11:20 -0700
From: Yinghai Lu <yhlu.kernel@...il.com>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>,
"Maciej W. Rozycki" <macro@...ux-mips.org>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: check command line when CONFIG_X86_MPPARSE is not set v2
if acpi=off, acpi=noirq and pci=noacpi, we need to disable apic
Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
---
arch/x86/kernel/acpi/boot.c | 14 ++++++++++++++
arch/x86/kernel/apic_32.c | 2 +-
arch/x86/kernel/setup.c | 4 ++++
arch/x86/kernel/setup_32.c | 5 +++++
arch/x86/kernel/setup_64.c | 9 +++++++++
include/asm-x86/apic.h | 6 +++++-
include/linux/acpi.h | 6 ++++++
7 files changed, 44 insertions(+), 2 deletions(-)
Index: linux-2.6/arch/x86/kernel/acpi/boot.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/acpi/boot.c
+++ linux-2.6/arch/x86/kernel/acpi/boot.c
@@ -1740,6 +1740,20 @@ static int __init parse_pci(char *arg)
}
early_param("pci", parse_pci);
+int __init acpi_mps_check(void)
+{
+#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
+/* mptable code is not built-in*/
+ if (acpi_disabled || acpi_noirq) {
+ printk(KERN_WARNING "MPS support code is not built-in.\n"
+ "Using acpi=off or acpi=noirq or pci=noacpi "
+ "may have problem\n");
+ return 1;
+ }
+#endif
+ return 0;
+}
+
#ifdef CONFIG_X86_IO_APIC
static int __init parse_acpi_skip_timer_override(char *arg)
{
Index: linux-2.6/arch/x86/kernel/setup_32.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup_32.c
+++ linux-2.6/arch/x86/kernel/setup_32.c
@@ -689,6 +689,11 @@ void __init setup_arch(char **cmdline_p)
early_dump_pci_devices();
#endif
+ if (acpi_mps_check()){
+ enable_local_apic = -1;
+ clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
+ }
+
finish_e820_parsing();
probe_roms();
Index: linux-2.6/arch/x86/kernel/setup_64.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup_64.c
+++ linux-2.6/arch/x86/kernel/setup_64.c
@@ -319,6 +319,11 @@ void __init setup_arch(char **cmdline_p)
early_dump_pci_devices();
#endif
+ if (acpi_mps_check()) {
+ disable_apic = 1;
+ clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
+ }
+
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
if (init_ohci1394_dma_early)
init_ohci1394_dma_on_all_controllers();
@@ -740,6 +745,10 @@ static void __cpuinit early_identify_cpu
cpu_devs[c->x86_vendor]->c_early_init(c);
validate_pat_support(c);
+
+ /* early_param could clear that, but recall get it set again */
+ if (disable_apic)
+ clear_cpu_cap(c, X86_FEATURE_APIC);
}
/*
Index: linux-2.6/include/linux/acpi.h
===================================================================
--- linux-2.6.orig/include/linux/acpi.h
+++ linux-2.6/include/linux/acpi.h
@@ -82,6 +82,7 @@ char * __acpi_map_table (unsigned long p
int early_acpi_boot_init(void);
int acpi_boot_init (void);
int acpi_boot_table_init (void);
+int acpi_mps_check (void);
int acpi_numa_init (void);
int acpi_table_init (void);
@@ -250,6 +251,11 @@ static inline int acpi_boot_table_init(v
return 0;
}
+static inline int acpi_mps_check(void)
+{
+ return 0;
+}
+
static inline int acpi_check_resource_conflict(struct resource *res)
{
return 0;
Index: linux-2.6/arch/x86/kernel/setup.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup.c
+++ linux-2.6/arch/x86/kernel/setup.c
@@ -161,6 +161,10 @@ void __init setup_per_cpu_areas(void)
char *ptr;
int cpu;
+ /* no processor from mptable or madt */
+ if (!num_processors)
+ num_processors = 1;
+
#ifdef CONFIG_HOTPLUG_CPU
prefill_possible_map();
#else
Index: linux-2.6/arch/x86/kernel/apic_32.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic_32.c
+++ linux-2.6/arch/x86/kernel/apic_32.c
@@ -57,7 +57,7 @@ unsigned long mp_lapic_addr;
*
* -1=force-disable, +1=force-enable
*/
-static int enable_local_apic __initdata;
+int enable_local_apic;
/* Local APIC timer verification ok */
static int local_apic_timer_verify_ok;
Index: linux-2.6/include/asm-x86/apic.h
===================================================================
--- linux-2.6.orig/include/asm-x86/apic.h
+++ linux-2.6/include/asm-x86/apic.h
@@ -39,8 +39,12 @@ extern int apic_verbosity;
extern int local_apic_timer_c2_ok;
extern int ioapic_force;
-extern int disable_apic;
+#ifdef CONFIG_X86_64
+extern int disable_apic;
+#else
+extern int enable_local_apic;
+#endif
/*
* Basic functions accessing APICs.
*/
--
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