mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 05:16:53 +07:00
a62eaf151d
AMD SimNow!'s JIT doesn't like them at all in the guest. For distribution installation it's easiest if it's a boot time option. Also I moved the variable to a more appropiate place and make it independent from sysctl And marked __read_mostly which it is. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/init.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/msr.h>
|
|
#include "cpu.h"
|
|
|
|
static void __init init_transmeta(struct cpuinfo_x86 *c)
|
|
{
|
|
unsigned int cap_mask, uk, max, dummy;
|
|
unsigned int cms_rev1, cms_rev2;
|
|
unsigned int cpu_rev, cpu_freq, cpu_flags, new_cpu_rev;
|
|
char cpu_info[65];
|
|
|
|
get_model_name(c); /* Same as AMD/Cyrix */
|
|
display_cacheinfo(c);
|
|
|
|
/* Print CMS and CPU revision */
|
|
max = cpuid_eax(0x80860000);
|
|
cpu_rev = 0;
|
|
if ( max >= 0x80860001 ) {
|
|
cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags);
|
|
if (cpu_rev != 0x02000000) {
|
|
printk(KERN_INFO "CPU: Processor revision %u.%u.%u.%u, %u MHz\n",
|
|
(cpu_rev >> 24) & 0xff,
|
|
(cpu_rev >> 16) & 0xff,
|
|
(cpu_rev >> 8) & 0xff,
|
|
cpu_rev & 0xff,
|
|
cpu_freq);
|
|
}
|
|
}
|
|
if ( max >= 0x80860002 ) {
|
|
cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy);
|
|
if (cpu_rev == 0x02000000) {
|
|
printk(KERN_INFO "CPU: Processor revision %08X, %u MHz\n",
|
|
new_cpu_rev, cpu_freq);
|
|
}
|
|
printk(KERN_INFO "CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n",
|
|
(cms_rev1 >> 24) & 0xff,
|
|
(cms_rev1 >> 16) & 0xff,
|
|
(cms_rev1 >> 8) & 0xff,
|
|
cms_rev1 & 0xff,
|
|
cms_rev2);
|
|
}
|
|
if ( max >= 0x80860006 ) {
|
|
cpuid(0x80860003,
|
|
(void *)&cpu_info[0],
|
|
(void *)&cpu_info[4],
|
|
(void *)&cpu_info[8],
|
|
(void *)&cpu_info[12]);
|
|
cpuid(0x80860004,
|
|
(void *)&cpu_info[16],
|
|
(void *)&cpu_info[20],
|
|
(void *)&cpu_info[24],
|
|
(void *)&cpu_info[28]);
|
|
cpuid(0x80860005,
|
|
(void *)&cpu_info[32],
|
|
(void *)&cpu_info[36],
|
|
(void *)&cpu_info[40],
|
|
(void *)&cpu_info[44]);
|
|
cpuid(0x80860006,
|
|
(void *)&cpu_info[48],
|
|
(void *)&cpu_info[52],
|
|
(void *)&cpu_info[56],
|
|
(void *)&cpu_info[60]);
|
|
cpu_info[64] = '\0';
|
|
printk(KERN_INFO "CPU: %s\n", cpu_info);
|
|
}
|
|
|
|
/* Unhide possibly hidden capability flags */
|
|
rdmsr(0x80860004, cap_mask, uk);
|
|
wrmsr(0x80860004, ~0, uk);
|
|
c->x86_capability[0] = cpuid_edx(0x00000001);
|
|
wrmsr(0x80860004, cap_mask, uk);
|
|
|
|
/* If we can run i686 user-space code, call us an i686 */
|
|
#define USER686 (X86_FEATURE_TSC|X86_FEATURE_CX8|X86_FEATURE_CMOV)
|
|
if ( c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686 )
|
|
c->x86 = 6;
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
/* randomize_va_space slows us down enormously;
|
|
it probably triggers retranslation of x86->native bytecode */
|
|
randomize_va_space = 0;
|
|
#endif
|
|
}
|
|
|
|
static void __init transmeta_identify(struct cpuinfo_x86 * c)
|
|
{
|
|
u32 xlvl;
|
|
generic_identify(c);
|
|
|
|
/* Transmeta-defined flags: level 0x80860001 */
|
|
xlvl = cpuid_eax(0x80860000);
|
|
if ( (xlvl & 0xffff0000) == 0x80860000 ) {
|
|
if ( xlvl >= 0x80860001 )
|
|
c->x86_capability[2] = cpuid_edx(0x80860001);
|
|
}
|
|
}
|
|
|
|
static struct cpu_dev transmeta_cpu_dev __initdata = {
|
|
.c_vendor = "Transmeta",
|
|
.c_ident = { "GenuineTMx86", "TransmetaCPU" },
|
|
.c_init = init_transmeta,
|
|
.c_identify = transmeta_identify,
|
|
};
|
|
|
|
int __init transmeta_init_cpu(void)
|
|
{
|
|
cpu_devs[X86_VENDOR_TRANSMETA] = &transmeta_cpu_dev;
|
|
return 0;
|
|
}
|
|
|
|
//early_arch_initcall(transmeta_init_cpu);
|
|
|
|
static int __init transmeta_exit_cpu(void)
|
|
{
|
|
cpu_devs[X86_VENDOR_TRANSMETA] = NULL;
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(transmeta_exit_cpu);
|