AuxXxilium/linux_dsm_epyc7002
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x86: convert some existing cpuid disable options to new generic bitmap

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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@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Andi Kleen 2008-01-30 13:33:20 +01:00 committed by Ingo Molnar
parent 7d851c8d3d
commit 135302577b
2 changed files with 5 additions and 34 deletions
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34
arch/x86/kernel/cpu/common.c
View File

@ -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(struct cpuinfo_x86 *c, int early)
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 cpuinfo_x86 *c)
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
}

5
arch/x86/kernel/setup_32.c
View File

@ -68,8 +68,6 @@
address, and must not be in the .bss segment! */
unsigned long init_pg_tables_end __initdata = ~0UL;
int disable_pse __cpuinitdata = 0;
/*
* Machine setup..
*/
@ -242,8 +240,7 @@ 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