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Commit 3da99c97 authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

x86: make (early)_identify_cpu more the same between 32bit and 64 bit 



1. add extended_cpuid_level for 32bit
 2. add generic_identify for 64bit
 3. add early_identify_cpu for 32bit
 4. early_identify_cpu not be called by identify_cpu
 5. remove early in get_cpu_vendor for 32bit
 6. add get_cpu_cap
 7. add cpu_detect for 64bit

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 5031088d

arch/x86/kernel/cpu/common.c

+53 −85
Original line number Diff line number Diff line
@@ -96,7 +96,7 @@ int __cpuinit get_model_name(struct cpuinfo_x86 *c) 
	unsigned int *v;

	char *p, *q;



	if (cpuid_eax(0x80000000) < 0x80000004)

	if (c->extended_cpuid_level < 0x80000004)

		return 0;



	v = (unsigned int *) c->x86_model_id;
@@ -125,7 +125,7 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) 
{

	unsigned int n, dummy, ecx, edx, l2size;



	n = cpuid_eax(0x80000000);

	n = c->extended_cpuid_level;



	if (n >= 0x80000005) {

		cpuid(0x80000005, &dummy, &dummy, &ecx, &edx);
@@ -186,7 +186,7 @@ static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c) 
}





static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c, int early)

static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)

{

	char *v = c->x86_vendor_id;

	int i;
@@ -198,7 +198,6 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c, int early) 
			    (cpu_devs[i]->c_ident[1] &&

			     !strcmp(v, cpu_devs[i]->c_ident[1]))) {

				c->x86_vendor = i;

				if (!early)

				this_cpu = cpu_devs[i];

				return;

			}
@@ -284,13 +283,12 @@ void __init cpu_detect(struct cpuinfo_x86 *c) 
		}

	}

}

static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)



static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)

{

	u32 tfms, xlvl;

	unsigned int ebx;

	u32 ebx;



	memset(&c->x86_capability, 0, sizeof c->x86_capability);

	if (have_cpuid_p()) {

	/* Intel-defined flags: level 0x00000001 */

	if (c->cpuid_level >= 0x00000001) {

		u32 capability, excap;
@@ -301,17 +299,14 @@ static void __cpuinit early_get_cap(struct cpuinfo_x86 *c) 


	/* AMD-defined flags: level 0x80000001 */

	xlvl = cpuid_eax(0x80000000);

	c->extended_cpuid_level = xlvl;

	if ((xlvl & 0xffff0000) == 0x80000000) {

		if (xlvl >= 0x80000001) {

			c->x86_capability[1] = cpuid_edx(0x80000001);

			c->x86_capability[6] = cpuid_ecx(0x80000001);

		}

	}



	}



}



/*

 * Do minimum CPU detection early.

 * Fields really needed: vendor, cpuid_level, family, model, mask,
@@ -321,25 +316,29 @@ static void __cpuinit early_get_cap(struct cpuinfo_x86 *c) 
 * WARNING: this function is only called on the BP.  Don't add code here

 * that is supposed to run on all CPUs.

 */

static void __init early_cpu_detect(void)

static void __init early_identify_cpu(struct cpuinfo_x86 *c)

{

	struct cpuinfo_x86 *c = &boot_cpu_data;



	c->x86_cache_alignment = 32;

	c->x86_clflush_size = 32;



	if (!have_cpuid_p())

		return;



	c->extended_cpuid_level = 0;



	memset(&c->x86_capability, 0, sizeof c->x86_capability);



	cpu_detect(c);



	get_cpu_vendor(c, 1);

	get_cpu_vendor(c);



	early_get_cap(c);

	get_cpu_cap(c);



	if (c->x86_vendor != X86_VENDOR_UNKNOWN &&

	    cpu_devs[c->x86_vendor]->c_early_init)

		cpu_devs[c->x86_vendor]->c_early_init(c);



	validate_pat_support(c);

}



/*
@@ -373,61 +372,33 @@ static void __cpuinit detect_nopl(struct cpuinfo_x86 *c) 


static void __cpuinit generic_identify(struct cpuinfo_x86 *c)

{

	u32 tfms, xlvl;

	unsigned int ebx;

	if (!have_cpuid_p())

		return;



	if (have_cpuid_p()) {

		/* Get vendor name */

		cpuid(0x00000000, (unsigned int *)&c->cpuid_level,

		      (unsigned int *)&c->x86_vendor_id[0],

		      (unsigned int *)&c->x86_vendor_id[8],

		      (unsigned int *)&c->x86_vendor_id[4]);

	c->extended_cpuid_level = 0;



	cpu_detect(c);



	get_cpu_vendor(c);



	get_cpu_cap(c);



		get_cpu_vendor(c, 0);

		/* Initialize the standard set of capabilities */

		/* Note that the vendor-specific code below might override */

		/* Intel-defined flags: level 0x00000001 */

	if (c->cpuid_level >= 0x00000001) {

			u32 capability, excap;

			cpuid(0x00000001, &tfms, &ebx, &excap, &capability);

			c->x86_capability[0] = capability;

			c->x86_capability[4] = excap;

			c->x86 = (tfms >> 8) & 15;

			c->x86_model = (tfms >> 4) & 15;

			if (c->x86 == 0xf)

				c->x86 += (tfms >> 20) & 0xff;

			if (c->x86 >= 0x6)

				c->x86_model += ((tfms >> 16) & 0xF) << 4;

			c->x86_mask = tfms & 15;

			c->initial_apicid = (ebx >> 24) & 0xFF;

		c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xFF;

#ifdef CONFIG_X86_HT

		c->apicid = phys_pkg_id(c->initial_apicid, 0);

		c->phys_proc_id = c->initial_apicid;

#else

		c->apicid = c->initial_apicid;

#endif

			if (test_cpu_cap(c, X86_FEATURE_CLFLSH))

				c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;

		} else {

			/* Have CPUID level 0 only - unheard of */

			c->x86 = 4;

	}



		/* AMD-defined flags: level 0x80000001 */

		xlvl = cpuid_eax(0x80000000);

		if ((xlvl & 0xffff0000) == 0x80000000) {

			if (xlvl >= 0x80000001) {

				c->x86_capability[1] = cpuid_edx(0x80000001);

				c->x86_capability[6] = cpuid_ecx(0x80000001);

			}

			if (xlvl >= 0x80000004)

	if (c->extended_cpuid_level >= 0x80000004)

		get_model_name(c); /* Default name */

		}



	init_scattered_cpuid_features(c);

	detect_nopl(c);

}

}



static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)

{
@@ -651,13 +622,10 @@ void __init early_cpu_init(void) 
{

	struct cpu_vendor_dev *cvdev;



	for (cvdev = __x86cpuvendor_start ;

	     cvdev < __x86cpuvendor_end   ;

	     cvdev++)

	for (cvdev = __x86cpuvendor_start; cvdev < __x86cpuvendor_end; cvdev++)

		cpu_devs[cvdev->vendor] = cvdev->cpu_dev;



	early_cpu_detect();

	validate_pat_support(&boot_cpu_data);

	early_identify_cpu(&boot_cpu_data);

}



/* Make sure %fs is initialized properly in idle threads */

arch/x86/kernel/cpu/common_64.c

+88 −51
Original line number Diff line number Diff line
@@ -195,6 +195,7 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) 
		printk(KERN_ERR "CPU: Your system may be unstable.\n");

	}

	c->x86_vendor = X86_VENDOR_UNKNOWN;

	this_cpu = &default_cpu;

}



static void __init early_cpu_support_print(void)
@@ -249,56 +250,18 @@ static void __cpuinit detect_nopl(struct cpuinfo_x86 *c) 
	}

}



static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);



void __init early_cpu_init(void)

{

        struct cpu_vendor_dev *cvdev;



        for (cvdev = __x86cpuvendor_start ;

             cvdev < __x86cpuvendor_end   ;

             cvdev++)

                cpu_devs[cvdev->vendor] = cvdev->cpu_dev;

	early_cpu_support_print();

	early_identify_cpu(&boot_cpu_data);

}



/* Do some early cpuid on the boot CPU to get some parameter that are

   needed before check_bugs. Everything advanced is in identify_cpu

   below. */

static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)

void __cpuinit cpu_detect(struct cpuinfo_x86 *c)

{

	u32 tfms, xlvl;



	c->loops_per_jiffy = loops_per_jiffy;

	c->x86_cache_size = -1;

	c->x86_vendor = X86_VENDOR_UNKNOWN;

	c->x86_model = c->x86_mask = 0;	/* So far unknown... */

	c->x86_vendor_id[0] = '\0'; /* Unset */

	c->x86_model_id[0] = '\0';  /* Unset */

	c->x86_clflush_size = 64;

	c->x86_cache_alignment = c->x86_clflush_size;

	c->x86_max_cores = 1;

	c->x86_coreid_bits = 0;

	c->extended_cpuid_level = 0;

	memset(&c->x86_capability, 0, sizeof c->x86_capability);



	/* Get vendor name */

	cpuid(0x00000000, (unsigned int *)&c->cpuid_level,

	      (unsigned int *)&c->x86_vendor_id[0],

	      (unsigned int *)&c->x86_vendor_id[8],

	      (unsigned int *)&c->x86_vendor_id[4]);



	get_cpu_vendor(c);



	/* Initialize the standard set of capabilities */

	/* Note that the vendor-specific code below might override */



	/* Intel-defined flags: level 0x00000001 */

	if (c->cpuid_level >= 0x00000001) {

		__u32 misc;

		cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],

		      &c->x86_capability[0]);

		u32 junk, tfms, cap0, misc;

		cpuid(0x00000001, &tfms, &misc, &junk, &cap0);

		c->x86 = (tfms >> 8) & 0xf;

		c->x86_model = (tfms >> 4) & 0xf;

		c->x86_mask = tfms & 0xf;
@@ -306,17 +269,32 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) 
			c->x86 += (tfms >> 20) & 0xff;

		if (c->x86 >= 0x6)

			c->x86_model += ((tfms >> 16) & 0xF) << 4;

		if (test_cpu_cap(c, X86_FEATURE_CLFLSH))

		if (cap0 & (1<<19))

			c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;

	} else {

		/* Have CPUID level 0 only - unheard of */

		c->x86 = 4;

	}

}





static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)

{

	u32 tfms, xlvl;

	u32 ebx;



	/* Initialize the standard set of capabilities */

	/* Note that the vendor-specific code below might override */



	/* Intel-defined flags: level 0x00000001 */

	if (c->cpuid_level >= 0x00000001) {

		u32 capability, excap;



		cpuid(0x00000001, &tfms, &ebx, &excap, &capability);

		c->x86_capability[0] = capability;

		c->x86_capability[4] = excap;

	}



	c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;

#ifdef CONFIG_SMP

	c->phys_proc_id = c->initial_apicid;

#endif

	/* AMD-defined flags: level 0x80000001 */

	xlvl = cpuid_eax(0x80000000);

	c->extended_cpuid_level = xlvl;
@@ -325,8 +303,6 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) 
			c->x86_capability[1] = cpuid_edx(0x80000001);

			c->x86_capability[6] = cpuid_ecx(0x80000001);

		}

		if (xlvl >= 0x80000004)

			get_model_name(c); /* Default name */

	}



	/* Transmeta-defined flags: level 0x80860001 */
@@ -346,8 +322,26 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) 
		c->x86_virt_bits = (eax >> 8) & 0xff;

		c->x86_phys_bits = eax & 0xff;

	}

}



	detect_nopl(c);

/* Do some early cpuid on the boot CPU to get some parameter that are

   needed before check_bugs. Everything advanced is in identify_cpu

   below. */

static void __init early_identify_cpu(struct cpuinfo_x86 *c)

{



	c->x86_clflush_size = 64;

	c->x86_cache_alignment = c->x86_clflush_size;



	memset(&c->x86_capability, 0, sizeof c->x86_capability);



	c->extended_cpuid_level = 0;



	cpu_detect(c);



	get_cpu_vendor(c);



	get_cpu_cap(c);



	if (c->x86_vendor != X86_VENDOR_UNKNOWN &&

	    cpu_devs[c->x86_vendor]->c_early_init)
@@ -356,6 +350,39 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) 
	validate_pat_support(c);

}



void __init early_cpu_init(void)

{

	struct cpu_vendor_dev *cvdev;



	for (cvdev = __x86cpuvendor_start; cvdev < __x86cpuvendor_end; cvdev++)

		cpu_devs[cvdev->vendor] = cvdev->cpu_dev;



	early_cpu_support_print();

	early_identify_cpu(&boot_cpu_data);

}



static void __cpuinit generic_identify(struct cpuinfo_x86 *c)

{

	c->extended_cpuid_level = 0;



	cpu_detect(c);



	get_cpu_vendor(c);



	get_cpu_cap(c);



	c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;

#ifdef CONFIG_SMP

	c->phys_proc_id = c->initial_apicid;

#endif



	if (c->extended_cpuid_level >= 0x80000004)

		get_model_name(c); /* Default name */



	init_scattered_cpuid_features(c);

	detect_nopl(c);

}



/*

 * This does the hard work of actually picking apart the CPU stuff...

 */
@@ -363,9 +390,19 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c) 
{

	int i;



	early_identify_cpu(c);

	c->loops_per_jiffy = loops_per_jiffy;

	c->x86_cache_size = -1;

	c->x86_vendor = X86_VENDOR_UNKNOWN;

	c->x86_model = c->x86_mask = 0;	/* So far unknown... */

	c->x86_vendor_id[0] = '\0'; /* Unset */

	c->x86_model_id[0] = '\0';  /* Unset */

	c->x86_clflush_size = 64;

	c->x86_cache_alignment = c->x86_clflush_size;

	c->x86_max_cores = 1;

	c->x86_coreid_bits = 0;

	memset(&c->x86_capability, 0, sizeof c->x86_capability);



	init_scattered_cpuid_features(c);

	generic_identify(c);



	c->apicid = phys_pkg_id(0);

include/asm-x86/processor.h

+1 −1
Original line number Diff line number Diff line
@@ -77,9 +77,9 @@ struct cpuinfo_x86 { 
	__u8			x86_phys_bits;

	/* CPUID returned core id bits: */

	__u8			x86_coreid_bits;

#endif

	/* Max extended CPUID function supported: */

	__u32			extended_cpuid_level;

#endif

	/* Maximum supported CPUID level, -1=no CPUID: */

	int			cpuid_level;

	__u32			x86_capability[NCAPINTS];