From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965797AbdAILlx (ORCPT ); Mon, 9 Jan 2017 06:41:53 -0500 Received: from mail.skyhub.de ([78.46.96.112]:58625 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936175AbdAILlu (ORCPT ); Mon, 9 Jan 2017 06:41:50 -0500 From: Borislav Petkov To: X86 ML Cc: LKML Subject: [PATCH 1/5] x86/CPU: Add native CPUID variants returning a single datum Date: Mon, 9 Jan 2017 12:41:43 +0100 Message-Id: <20170109114147.5082-2-bp@alien8.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170109114147.5082-1-bp@alien8.de> References: <20170109114147.5082-1-bp@alien8.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov ... similarly to the cpuid_() variants. Signed-off-by: Borislav Petkov --- arch/x86/include/asm/processor.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) 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)); -- 2.11.0