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| author | Borislav Petkov <bp@suse.de> | 2017-01-09 12:41:43 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-01-09 23:11:13 +0100 |
| commit | 5dedade6dfa243c130b85d1e4daba6f027805033 (patch) | |
| tree | c6e315a77002b5d3e3b3305fbc4844fe813ef022 | |
| parent | fac69d0efad08fc15e4dbfc116830782acc0dc9a (diff) | |
| download | linux-5dedade6dfa243c130b85d1e4daba6f027805033.tar.bz2 | |
x86/CPU: Add native CPUID variants returning a single datum
... 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>
| -rw-r--r-- | arch/x86/include/asm/processor.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index eaf100508c36..1be64da0384e 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -219,6 +219,24 @@ static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, : "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)); |