From patchwork Tue Mar 15 16:44:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reinette Chatre X-Patchwork-Id: 12781651 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D29BC433F5 for ; Tue, 15 Mar 2022 16:44:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350166AbiCOQqE (ORCPT ); Tue, 15 Mar 2022 12:46:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350157AbiCOQqD (ORCPT ); Tue, 15 Mar 2022 12:46:03 -0400 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 60D3057175; Tue, 15 Mar 2022 09:44:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647362690; x=1678898690; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MiECI56S/9YDiazX0GEdDxu5MUFGAQDPH4TCVnzWb8k=; b=DhFX2fW9LVqS3GM3qqdOG5dSu+u1YVGeRGUM3jUijbLkXr1toCdyFEUP 38+0g8jsvDMchDLBCi2YFGmFQ4oUkd7j482vNeBTAF7K688jPR2lynyXN +HWlC+gi+Wdm8e1+IVbnMHvYw4l2XFG9zxJSfdVm2owpzs6aQMygGSpEA FVUTqotQrSdLiddM5u88vCswqnTiRQcqxjhLrhIGbgoa/A14DIc7vHXuC Zf6UntdkZwIAqzEWYRBPc6r1Jk4EZm4v47T7mcL3yRYy5xlOiyzNnhdA3 vWIjfIXfPJ39B9DBE8f0lUqKszm+wZE/klWF5jefJOghCQ1CDFbTeLDpX w==; X-IronPort-AV: E=McAfee;i="6200,9189,10286"; a="342782290" X-IronPort-AV: E=Sophos;i="5.90,184,1643702400"; d="scan'208";a="342782290" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2022 09:44:48 -0700 X-IronPort-AV: E=Sophos;i="5.90,184,1643702400"; d="scan'208";a="714236353" Received: from rchatre-ws.ostc.intel.com ([10.54.69.144]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2022 09:44:47 -0700 From: Reinette Chatre To: shuah@kernel.org, linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org, dave.hansen@linux.intel.com, sandipan@linux.ibm.com, fweimer@redhat.com, desnesn@linux.vnet.ibm.com, mingo@kernel.org, bauerman@linux.ibm.com, mpe@ellerman.id.au, msuchanek@suse.de, linux-mm@kvack.org, chang.seok.bae@intel.com, bp@suse.de, tglx@linutronix.de, hpa@zytor.com, x86@kernel.org, luto@kernel.org Subject: [PATCH V2 2/4] selftests/vm/pkeys: Use provided __cpuid_count() macro Date: Tue, 15 Mar 2022 09:44:26 -0700 Message-Id: <66785246406c40e173fe7ce1470dd6d5292d1499.1647360971.git.reinette.chatre@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org kselftest.h makes the __cpuid_count() macro available to conveniently call the CPUID instruction. Remove the local CPUID wrapper and use __cpuid_count() from already included kselftest.h instead. __cpuid_count() from kselftest.h is used instead of the macro provided by the compiler since gcc v4.4 (via cpuid.h) because the selftest needs to be compiled with gcc v3.2, the minimal required version for stable kernels. Cc: Dave Hansen Cc: Sandipan Das Cc: Florian Weimer Cc: "Desnes A. Nunes do Rosario" Cc: Ingo Molnar Cc: Thiago Jung Bauermann Cc: Michael Ellerman Cc: Michal Suchanek Cc: linux-mm@kvack.org Signed-off-by: Reinette Chatre --- Changes since V1: - Update changelog - Remove Ram Pai from cc list (email address no longer valid) - No longer include cpuid.h but obtain __cpuid_count() from kselftest.h. tools/testing/selftests/vm/pkey-x86.h | 21 ++------------------- 1 file changed, 2 insertions(+), 19 deletions(-) diff --git a/tools/testing/selftests/vm/pkey-x86.h b/tools/testing/selftests/vm/pkey-x86.h index e4a4ce2b826d..b078ce9c6d2a 100644 --- a/tools/testing/selftests/vm/pkey-x86.h +++ b/tools/testing/selftests/vm/pkey-x86.h @@ -80,19 +80,6 @@ static inline void __write_pkey_reg(u64 pkey_reg) assert(pkey_reg == __read_pkey_reg()); } -static inline void __cpuid(unsigned int *eax, unsigned int *ebx, - unsigned int *ecx, unsigned int *edx) -{ - /* ecx is often an input as well as an output. */ - asm volatile( - "cpuid;" - : "=a" (*eax), - "=b" (*ebx), - "=c" (*ecx), - "=d" (*edx) - : "0" (*eax), "2" (*ecx)); -} - /* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx) */ #define X86_FEATURE_PKU (1<<3) /* Protection Keys for Userspace */ #define X86_FEATURE_OSPKE (1<<4) /* OS Protection Keys Enable */ @@ -104,9 +91,7 @@ static inline int cpu_has_pkeys(void) unsigned int ecx; unsigned int edx; - eax = 0x7; - ecx = 0x0; - __cpuid(&eax, &ebx, &ecx, &edx); + __cpuid_count(0x7, 0x0, eax, ebx, ecx, edx); if (!(ecx & X86_FEATURE_PKU)) { dprintf2("cpu does not have PKU\n"); @@ -142,9 +127,7 @@ int pkey_reg_xstate_offset(void) /* assume that XSTATE_PKEY is set in XCR0 */ leaf = XSTATE_PKEY_BIT; { - eax = XSTATE_CPUID; - ecx = leaf; - __cpuid(&eax, &ebx, &ecx, &edx); + __cpuid_count(XSTATE_CPUID, leaf, eax, ebx, ecx, edx); if (leaf == XSTATE_PKEY_BIT) { xstate_offset = ebx;