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Date: Fri, 18 Jan 2008 18:27:18 +0100 (CET)
From: Andi Kleen <ak@...e.de>
To: mingo@...e.hu, hpa@...or.com, tglx@...utronix.de,
linux-kernel@...r.kernel.org
Subject: [PATCH] [2/7] Convert some existing cpuid disable options to new generic bitmap
This convers nofxsr, mem=nopentium and nosep to use the new
generic cpuid disable bitmap instead of using own variables.
Signed-off-by: Andi Kleen <ak@...e.de>
---
arch/x86/kernel/cpu/common.c | 34 ++++------------------------------
arch/x86/kernel/setup_32.c | 5 +----
2 files changed, 5 insertions(+), 34 deletions(-)
Index: linux/arch/x86/kernel/cpu/common.c
===================================================================
--- linux.orig/arch/x86/kernel/cpu/common.c
+++ linux/arch/x86/kernel/cpu/common.c
@@ -60,14 +60,10 @@ EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
static int cachesize_override __cpuinitdata = -1;
-static int disable_x86_fxsr __cpuinitdata;
static int disable_x86_serial_nr __cpuinitdata = 1;
-static int disable_x86_sep __cpuinitdata;
struct cpu_dev * cpu_devs[X86_VENDOR_NUM] = {};
-extern int disable_pse;
-
static void __cpuinit default_init(struct cpuinfo_x86 * c)
{
/* Not much we can do here... */
@@ -216,16 +212,8 @@ static void __cpuinit get_cpu_vendor(str
static int __init x86_fxsr_setup(char * s)
{
- /* Tell all the other CPUs to not use it... */
- disable_x86_fxsr = 1;
-
- /*
- * ... and clear the bits early in the boot_cpu_data
- * so that the bootup process doesn't try to do this
- * either.
- */
- clear_bit(X86_FEATURE_FXSR, boot_cpu_data.x86_capability);
- clear_bit(X86_FEATURE_XMM, boot_cpu_data.x86_capability);
+ setup_clear_cpu_cap(X86_FEATURE_FXSR);
+ setup_clear_cpu_cap(X86_FEATURE_XMM);
return 1;
}
__setup("nofxsr", x86_fxsr_setup);
@@ -233,7 +221,7 @@ __setup("nofxsr", x86_fxsr_setup);
static int __init x86_sep_setup(char * s)
{
- disable_x86_sep = 1;
+ setup_clear_cpu_cap(X86_FEATURE_SEP);
return 1;
}
__setup("nosep", x86_sep_setup);
@@ -462,19 +450,6 @@ void __cpuinit identify_cpu(struct cpuin
if ( tsc_disable )
clear_bit(X86_FEATURE_TSC, c->x86_capability);
- /* FXSR disabled? */
- if (disable_x86_fxsr) {
- clear_bit(X86_FEATURE_FXSR, c->x86_capability);
- clear_bit(X86_FEATURE_XMM, c->x86_capability);
- }
-
- /* SEP disabled? */
- if (disable_x86_sep)
- clear_bit(X86_FEATURE_SEP, c->x86_capability);
-
- if (disable_pse)
- clear_bit(X86_FEATURE_PSE, c->x86_capability);
-
/* If the model name is still unset, do table lookup. */
if ( !c->x86_model_id[0] ) {
char *p;
@@ -629,8 +604,7 @@ void __init early_cpu_init(void)
/* pse is not compatible with on-the-fly unmapping,
* disable it even if the cpus claim to support it.
*/
- clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
- disable_pse = 1;
+ setup_clear_cpu_cap(X86_FEATURE_PSE);
#endif
}
Index: linux/arch/x86/kernel/setup_32.c
===================================================================
--- linux.orig/arch/x86/kernel/setup_32.c
+++ linux/arch/x86/kernel/setup_32.c
@@ -70,8 +70,6 @@
address, and must not be in the .bss segment! */
unsigned long init_pg_tables_end __initdata = ~0UL;
-int disable_pse __cpuinitdata = 0;
-
/*
* Machine setup..
*/
@@ -245,8 +243,7 @@ static int __init parse_mem(char *arg)
return -EINVAL;
if (strcmp(arg, "nopentium") == 0) {
- clear_cpu_cap(&boot_cpu_data, X86_FEATURE_PSE);
- disable_pse = 1;
+ setup_clear_cpu_cap(X86_FEATURE_PSE);
} else {
/* If the user specifies memory size, we
* limit the BIOS-provided memory map to
--
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