From nobody Wed Jan 7 03:31:05 2026 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 E5A81E7849A for ; Mon, 2 Oct 2023 12:00:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236818AbjJBMAP (ORCPT ); Mon, 2 Oct 2023 08:00:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236893AbjJBL77 (ORCPT ); Mon, 2 Oct 2023 07:59:59 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B3C0F2 for ; Mon, 2 Oct 2023 04:59:49 -0700 (PDT) Message-ID: <20231002115902.684026662@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1696247988; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=Y5qxxKqecrle90S2dXSe1Mr+hVulDTSr+daYuKbLlV8=; b=bmensbdziZmshoPUC1vUh4BpkQ7Qnsg2EkOBQlm5HyU7L4/ktzCTe8Yk2lXP/W2a7+6EVa ZIorSy0pw079gFUXT99N7BKxo/L4HqkpNZ9Eh0AyvvIs9qjLDmmQkGkyqGGc/y7rP18D7P Vn4qgK9TUzbNh4vbhMWkJ4Gb3f2n4RO6b1N78duvH33LkyNpYUH/DrioDCHo+H3eyGzhCM 4UYPEY1ZWwUH7MYFTldwKtT1RFOH1EwZjKzfn1gVkIiCVvLhc15djX7k9M1kbE0C/A6HEY Zhc1ZGcGryBl18xMkDfk08vOdvcj7lzKFPWQFbWKSDfY6O91yYBrzZ3XjKNtMg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1696247988; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=Y5qxxKqecrle90S2dXSe1Mr+hVulDTSr+daYuKbLlV8=; b=kd5tbAIKuoATrkVyfG8j5tt9s7V3FKK8wnxgaU6lE8ymh85ygPfCbzr2//n4sTrrwCYp49 ZN75/+FKo1YtP9Ag== From: Thomas Gleixner To: LKML Cc: x86@kernel.org, Borislav Petkov , "Chang S. Bae" , Arjan van de Ven , Nikolay Borisov Subject: [patch V4 11/30] x86/microcode/intel: Rework intel_cpu_collect_info() References: <20231002115506.217091296@linutronix.de> MIME-Version: 1.0 Date: Mon, 2 Oct 2023 13:59:47 +0200 (CEST) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Nothing needs struct ucode_cpu_info. Make it take struct cpu_signature, let it return a boolean and simplify the implementation. Rename it now that the silly name clash with collect_cpu_info() is gone. Signed-off-by: Thomas Gleixner --- V2: New patch --- arch/x86/include/asm/cpu.h | 4 ++-- arch/x86/kernel/cpu/microcode/intel.c | 33 +++++++++--------------------= ---- drivers/platform/x86/intel/ifs/load.c | 8 +++----- 3 files changed, 14 insertions(+), 31 deletions(-) --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -73,9 +73,9 @@ static inline void init_ia32_feat_ctl(st =20 extern __noendbr void cet_disable(void); =20 -struct ucode_cpu_info; +struct cpu_signature; =20 -int intel_cpu_collect_info(struct ucode_cpu_info *uci); +void intel_collect_cpu_info(struct cpu_signature *sig); =20 static inline bool intel_cpu_signatures_match(unsigned int s1, unsigned in= t p1, unsigned int s2, unsigned int p2) --- a/arch/x86/kernel/cpu/microcode/intel.c +++ b/arch/x86/kernel/cpu/microcode/intel.c @@ -66,36 +66,21 @@ static inline unsigned int exttable_size return et->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE; } =20 -int intel_cpu_collect_info(struct ucode_cpu_info *uci) +void intel_collect_cpu_info(struct cpu_signature *sig) { - unsigned int val[2]; - unsigned int family, model; - struct cpu_signature csig =3D { 0 }; - unsigned int eax, ebx, ecx, edx; + sig->sig =3D cpuid_eax(1); + sig->pf =3D 0; + sig->rev =3D intel_get_microcode_revision(); =20 - memset(uci, 0, sizeof(*uci)); + if (x86_model(sig->sig) >=3D 5 || x86_family(sig->sig) > 6) { + unsigned int val[2]; =20 - eax =3D 0x00000001; - ecx =3D 0; - native_cpuid(&eax, &ebx, &ecx, &edx); - csig.sig =3D eax; - - family =3D x86_family(eax); - model =3D x86_model(eax); - - if (model >=3D 5 || family > 6) { /* get processor flags from MSR 0x17 */ native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]); - csig.pf =3D 1 << ((val[1] >> 18) & 7); + sig->pf =3D 1 << ((val[1] >> 18) & 7); } - - csig.rev =3D intel_get_microcode_revision(); - - uci->cpu_sig =3D csig; - - return 0; } -EXPORT_SYMBOL_GPL(intel_cpu_collect_info); +EXPORT_SYMBOL_GPL(intel_collect_cpu_info); =20 /* * Returns 1 if update has been found, 0 otherwise. @@ -377,7 +362,7 @@ static __init struct microcode_intel *ge if (!(cp.data && cp.size)) return NULL; =20 - intel_cpu_collect_info(uci); + intel_collect_cpu_info(&uci->cpu_sig); =20 return scan_microcode(cp.data, cp.size, uci); } --- a/drivers/platform/x86/intel/ifs/load.c +++ b/drivers/platform/x86/intel/ifs/load.c @@ -227,7 +227,7 @@ static int scan_chunks_sanity_check(stru =20 static int image_sanity_check(struct device *dev, const struct microcode_h= eader_intel *data) { - struct ucode_cpu_info uci; + struct cpu_signature sig; =20 /* Provide a specific error message when loading an older/unsupported ima= ge */ if (data->hdrver !=3D MC_HEADER_TYPE_IFS) { @@ -240,11 +240,9 @@ static int image_sanity_check(struct dev return -EINVAL; } =20 - intel_cpu_collect_info(&uci); + intel_collect_cpu_info(&sig); =20 - if (!intel_find_matching_signature((void *)data, - uci.cpu_sig.sig, - uci.cpu_sig.pf)) { + if (!intel_find_matching_signature((void *)data, sig.sig, sig.pf)) { dev_err(dev, "cpu signature, processor flags not matching\n"); return -EINVAL; }