/* SPDX-License-Identifier: GPL-2.0 */
#ifndef PERF_CPUID_H
#define PERF_CPUID_H 1


static inline void
cpuid(unsigned int op, unsigned int op2, unsigned int *a, unsigned int *b,
        unsigned int *c, unsigned int *d)
{
        /*
         * Preserve %ebx/%rbx register by either placing it in %rdi or saving it
         * on the stack - x86-64 needs to avoid the stack red zone. In PIC
         * compilations %ebx contains the address of the global offset
         * table. %rbx is occasionally used to address stack variables in
         * presence of dynamic allocas.
         */
        asm(
#if defined(__x86_64__)
                "mov %%rbx, %%rdi\n"
                "cpuid\n"
                "xchg %%rdi, %%rbx\n"
#else
                "pushl %%ebx\n"
                "cpuid\n"
                "movl %%ebx, %%edi\n"
                "popl %%ebx\n"
#endif
                : "=a"(*a), "=D"(*b), "=c"(*c), "=d"(*d)
                : "a"(op), "2"(op2));
}

void get_cpuid_0(char *vendor, unsigned int *lvl);

#endif