diff options
Diffstat (limited to 'sys/x86')
| -rw-r--r-- | sys/x86/include/x86_var.h | 3 | ||||
| -rw-r--r-- | sys/x86/x86/identcpu.c | 46 |
2 files changed, 28 insertions, 21 deletions
diff --git a/sys/x86/include/x86_var.h b/sys/x86/include/x86_var.h index 7705a1c..ffdf2f0 100644 --- a/sys/x86/include/x86_var.h +++ b/sys/x86/include/x86_var.h @@ -116,7 +116,8 @@ void cpu_setregs(void); void dump_add_page(vm_paddr_t); void dump_drop_page(vm_paddr_t); void finishidentcpu(void); -void identify_cpu(void); +void identify_cpu1(void); +void identify_cpu2(void); void identify_hypervisor(void); void initializecpu(void); void initializecpucache(void); diff --git a/sys/x86/x86/identcpu.c b/sys/x86/x86/identcpu.c index c0cc2a6..ab7214c 100644 --- a/sys/x86/x86/identcpu.c +++ b/sys/x86/x86/identcpu.c @@ -1370,9 +1370,8 @@ fix_cpuid(void) return (false); } -#ifdef __amd64__ void -identify_cpu(void) +identify_cpu1(void) { u_int regs[4]; @@ -1389,7 +1388,29 @@ identify_cpu(void) cpu_feature = regs[3]; cpu_feature2 = regs[2]; } -#endif + +void +identify_cpu2(void) +{ + u_int regs[4], cpu_stdext_disable; + + if (cpu_high >= 7) { + cpuid_count(7, 0, regs); + cpu_stdext_feature = regs[1]; + + /* + * Some hypervisors failed to filter out unsupported + * extended features. Allow to disable the + * extensions, activation of which requires setting a + * bit in CR4, and which VM monitors do not support. + */ + cpu_stdext_disable = 0; + TUNABLE_INT_FETCH("hw.cpu_stdext_disable", &cpu_stdext_disable); + cpu_stdext_feature &= ~cpu_stdext_disable; + + cpu_stdext_feature2 = regs[2]; + } +} /* * Final stage of CPU identification. @@ -1397,7 +1418,7 @@ identify_cpu(void) void finishidentcpu(void) { - u_int regs[4], cpu_stdext_disable; + u_int regs[4]; #ifdef __i386__ u_char ccr3; #endif @@ -1416,22 +1437,7 @@ finishidentcpu(void) cpu_mon_max_size = regs[1] & CPUID5_MON_MAX_SIZE; } - if (cpu_high >= 7) { - cpuid_count(7, 0, regs); - cpu_stdext_feature = regs[1]; - - /* - * Some hypervisors failed to filter out unsupported - * extended features. Allow to disable the - * extensions, activation of which requires setting a - * bit in CR4, and which VM monitors do not support. - */ - cpu_stdext_disable = 0; - TUNABLE_INT_FETCH("hw.cpu_stdext_disable", &cpu_stdext_disable); - cpu_stdext_feature &= ~cpu_stdext_disable; - - cpu_stdext_feature2 = regs[2]; - } + identify_cpu2(); #ifdef __i386__ if (cpu_high > 0 && |
