149         cp->cpu_brandstr = kmem_zalloc(CPU_IDSTRLEN, KM_SLEEP);
 150 
 151         /*
 152          * If called for the BSP, cp is equal to current CPU.
 153          * For non-BSPs, cpuid info of cp is not ready yet, so use cpuid info
 154          * of current CPU as default values for cpu_idstr and cpu_brandstr.
 155          * They will be corrected in mp_startup_common() after cpuid_pass1()
 156          * has been invoked on target CPU.
 157          */
 158         (void) cpuid_getidstr(CPU, cp->cpu_idstr, CPU_IDSTRLEN);
 159         (void) cpuid_getbrandstr(CPU, cp->cpu_brandstr, CPU_IDSTRLEN);
 160 }
 161 
 162 /*
 163  * Configure syscall support on this CPU.
 164  */
 165 /*ARGSUSED*/
 166 void
 167 init_cpu_syscall(struct cpu *cp)
 168 {
 169         uint64_t flags;
 170 
 171         kpreempt_disable();
 172 
 173 #if defined(__amd64)
 174         if (is_x86_feature(x86_featureset, X86FSET_MSR) &&
 175             is_x86_feature(x86_featureset, X86FSET_ASYSC)) {
 176                 uint64_t flags;
 177 
 178 #if !defined(__lint)
 179                 /*
 180                  * The syscall instruction imposes a certain ordering on
 181                  * segment selectors, so we double-check that ordering
 182                  * here.
 183                  */
 184                 ASSERT(KDS_SEL == KCS_SEL + 8);
 185                 ASSERT(UDS_SEL == U32CS_SEL + 8);
 186                 ASSERT(UCS_SEL == U32CS_SEL + 16);
 187 #endif
 188                 /*
 189                  * Turn syscall/sysret extensions on.
 190                  */

 149         cp->cpu_brandstr = kmem_zalloc(CPU_IDSTRLEN, KM_SLEEP);
 150 
 151         /*
 152          * If called for the BSP, cp is equal to current CPU.
 153          * For non-BSPs, cpuid info of cp is not ready yet, so use cpuid info
 154          * of current CPU as default values for cpu_idstr and cpu_brandstr.
 155          * They will be corrected in mp_startup_common() after cpuid_pass1()
 156          * has been invoked on target CPU.
 157          */
 158         (void) cpuid_getidstr(CPU, cp->cpu_idstr, CPU_IDSTRLEN);
 159         (void) cpuid_getbrandstr(CPU, cp->cpu_brandstr, CPU_IDSTRLEN);
 160 }
 161 
 162 /*
 163  * Configure syscall support on this CPU.
 164  */
 165 /*ARGSUSED*/
 166 void
 167 init_cpu_syscall(struct cpu *cp)
 168 {


 169         kpreempt_disable();
 170 
 171 #if defined(__amd64)
 172         if (is_x86_feature(x86_featureset, X86FSET_MSR) &&
 173             is_x86_feature(x86_featureset, X86FSET_ASYSC)) {
 174                 uint64_t flags;
 175 
 176 #if !defined(__lint)
 177                 /*
 178                  * The syscall instruction imposes a certain ordering on
 179                  * segment selectors, so we double-check that ordering
 180                  * here.
 181                  */
 182                 ASSERT(KDS_SEL == KCS_SEL + 8);
 183                 ASSERT(UDS_SEL == U32CS_SEL + 8);
 184                 ASSERT(UCS_SEL == U32CS_SEL + 16);
 185 #endif
 186                 /*
 187                  * Turn syscall/sysret extensions on.
 188                  */