From nobody Tue Dec 16 19:57:22 2025 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 A3C45CDB474 for ; Fri, 20 Oct 2023 11:41:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377217AbjJTLlg (ORCPT ); Fri, 20 Oct 2023 07:41:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377268AbjJTLl2 (ORCPT ); Fri, 20 Oct 2023 07:41:28 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E9FD10EC; Fri, 20 Oct 2023 04:38:28 -0700 (PDT) Date: Fri, 20 Oct 2023 11:37:56 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1697801877; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7Dde4zQ3N/+PNnijr4WGccMsGnFczmEgJNtPZcysd20=; b=swWCGNZss8KdC2DKljEGc/8aEksVCUTxqR/fSprUr5h8EtveZZ50wOX+LOAsOUf8XxxdeE 5NqjlPGdGE7bGUR2VXobTBCnZRSssyGF0gZXY60B5avTgy4fShq35PVvW8zC/vCT168Dbo Z5vIhcj+ARsDBWoQFKaHIuxJDG+oiJaOvXkFS2gQ3kF89efZM0JNJ/BJf7pCNOBuYJre9j r5Ml6abzImRXm9Pa/CvSfeaFYTUw90i+n1zcGz/8DIf9QBvHjvfn/x/JjaVOSSlW22d/lH 73zryMro7H8/PxFt2+1zwMdBmuGNAcRVHOVLkb03D76mM+OMTsLZOVrJtq56Ew== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1697801877; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7Dde4zQ3N/+PNnijr4WGccMsGnFczmEgJNtPZcysd20=; b=I9Jdf8y8snit8GKfGNsqpcjO4/BGYC1tQJrymtsna2UCS+5qK7454YhdkqatT7NEU1O5uz 4byu5/9/rD0VmHDQ== From: "tip-bot2 for Thomas Gleixner" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: x86/microcode] x86/microcode/intel: Rework intel_find_matching_signature() Cc: Thomas Gleixner , "Borislav Petkov (AMD)" , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20231002115902.797820205@linutronix.de> References: <20231002115902.797820205@linutronix.de> MIME-Version: 1.0 Message-ID: <169780187677.3135.561295708089872377.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the x86/microcode branch of tip: Commit-ID: 50b58fd4678dec0b1c948f9e9172d2f30e43b93f Gitweb: https://git.kernel.org/tip/50b58fd4678dec0b1c948f9e9172d2f30= e43b93f Author: Thomas Gleixner AuthorDate: Mon, 02 Oct 2023 13:59:50 +02:00 Committer: Borislav Petkov (AMD) CommitterDate: Thu, 19 Oct 2023 15:35:57 +02:00 x86/microcode/intel: Rework intel_find_matching_signature() Take a cpu_signature argument and work from there. Move the match() helper next to the callsite as there is no point for having it in a header. Signed-off-by: Thomas Gleixner Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20231002115902.797820205@linutronix.de --- arch/x86/include/asm/cpu.h | 16 +------------- arch/x86/kernel/cpu/microcode/intel.c | 31 +++++++++++++++----------- drivers/platform/x86/intel/ifs/load.c | 2 +- 3 files changed, 21 insertions(+), 28 deletions(-) diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index 068a07e..fecc4fe 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -75,22 +75,8 @@ struct cpu_signature; =20 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) -{ - if (s1 !=3D s2) - return false; - - /* Processor flags are either both 0 ... */ - if (!p1 && !p2) - return true; - - /* ... or they intersect. */ - return p1 & p2; -} - extern u64 x86_read_arch_cap_msr(void); -int intel_find_matching_signature(void *mc, unsigned int csig, int cpf); +bool intel_find_matching_signature(void *mc, struct cpu_signature *sig); int intel_microcode_sanity_check(void *mc, bool print_err, int hdr_type); =20 extern struct cpumask cpus_stop_mask; diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/mi= crocode/intel.c index 134df28..9dffb0c 100644 --- a/arch/x86/kernel/cpu/microcode/intel.c +++ b/arch/x86/kernel/cpu/microcode/intel.c @@ -82,29 +82,36 @@ void intel_collect_cpu_info(struct cpu_signature *sig) } EXPORT_SYMBOL_GPL(intel_collect_cpu_info); =20 -/* - * Returns 1 if update has been found, 0 otherwise. - */ -int intel_find_matching_signature(void *mc, unsigned int csig, int cpf) +static inline bool cpu_signatures_match(struct cpu_signature *s1, unsigned= int sig2, + unsigned int pf2) +{ + if (s1->sig !=3D sig2) + return false; + + /* Processor flags are either both 0 or they intersect. */ + return ((!s1->pf && !pf2) || (s1->pf & pf2)); +} + +bool intel_find_matching_signature(void *mc, struct cpu_signature *sig) { struct microcode_header_intel *mc_hdr =3D mc; - struct extended_sigtable *ext_hdr; struct extended_signature *ext_sig; + struct extended_sigtable *ext_hdr; int i; =20 - if (intel_cpu_signatures_match(csig, cpf, mc_hdr->sig, mc_hdr->pf)) - return 1; + if (cpu_signatures_match(sig, mc_hdr->sig, mc_hdr->pf)) + return true; =20 /* Look for ext. headers: */ if (get_totalsize(mc_hdr) <=3D intel_microcode_get_datasize(mc_hdr) + MC_= HEADER_SIZE) - return 0; + return false; =20 ext_hdr =3D mc + intel_microcode_get_datasize(mc_hdr) + MC_HEADER_SIZE; ext_sig =3D (void *)ext_hdr + EXT_HEADER_SIZE; =20 for (i =3D 0; i < ext_hdr->count; i++) { - if (intel_cpu_signatures_match(csig, cpf, ext_sig->sig, ext_sig->pf)) - return 1; + if (cpu_signatures_match(sig, ext_sig->sig, ext_sig->pf)) + return true; ext_sig++; } return 0; @@ -265,7 +272,7 @@ static __init struct microcode_intel *scan_microcode(vo= id *data, size_t size, intel_microcode_sanity_check(data, false, MC_HEADER_TYPE_MICROCODE) = < 0) break; =20 - if (!intel_find_matching_signature(data, uci->cpu_sig.sig, uci->cpu_sig.= pf)) + if (!intel_find_matching_signature(data, &uci->cpu_sig)) continue; =20 /* Check whether there is newer microcode */ @@ -496,7 +503,7 @@ static enum ucode_state parse_microcode_blobs(int cpu, = struct iov_iter *iter) if (cur_rev >=3D mc_header.rev) continue; =20 - if (!intel_find_matching_signature(mc, uci->cpu_sig.sig, uci->cpu_sig.pf= )) + if (!intel_find_matching_signature(mc, &uci->cpu_sig)) continue; =20 kvfree(new_mc); diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/i= ntel/ifs/load.c index 61174bd..3e1880f 100644 --- a/drivers/platform/x86/intel/ifs/load.c +++ b/drivers/platform/x86/intel/ifs/load.c @@ -242,7 +242,7 @@ static int image_sanity_check(struct device *dev, const= struct microcode_header_ =20 intel_collect_cpu_info(&sig); =20 - if (!intel_find_matching_signature((void *)data, sig.sig, sig.pf)) { + if (!intel_find_matching_signature((void *)data, &sig)) { dev_err(dev, "cpu signature, processor flags not matching\n"); return -EINVAL; }