From: Borislav Petkov bp@suse.de
commit 5dedade6dfa243c130b85d1e4daba6f027805033 upstream.
... similarly to the cpuid_<reg>() variants.
Signed-off-by: Borislav Petkov bp@suse.de Link: http://lkml.kernel.org/r/20170109114147.5082-2-bp@alien8.de Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: Evalds Iodzevics evalds.iodzevics@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/include/asm/processor.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
--- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -212,6 +212,24 @@ static inline void native_cpuid(unsigned : "memory"); }
+#define native_cpuid_reg(reg) \ +static inline unsigned int native_cpuid_##reg(unsigned int op) \ +{ \ + unsigned int eax = op, ebx, ecx = 0, edx; \ + \ + native_cpuid(&eax, &ebx, &ecx, &edx); \ + \ + return reg; \ +} + +/* + * Native CPUID functions returning a single datum. + */ +native_cpuid_reg(eax) +native_cpuid_reg(ebx) +native_cpuid_reg(ecx) +native_cpuid_reg(edx) + static inline void load_cr3(pgd_t *pgdir) { write_cr3(__pa(pgdir));