From nobody Wed Dec 17 18:02:29 2025 Received: from mail-pg1-f182.google.com (mail-pg1-f182.google.com [209.85.215.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0A39F219E4 for ; Sat, 14 Dec 2024 00:53:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734137595; cv=none; b=LlIZtCtDY+22FnCdhO1n7y7nVelFtkvCH20GvTdv4wSE82TRLJIRmtU83gCLh37HSv/osB5XvRC7MiPrEpXEiy90UdV5sncFQSBVp1LgSb2Z3NbctpaGR0MV30XMWGiyao7LXpZ790Q2qGsw/dF1+6VihMLg59jT84GSsFUGn0M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734137595; c=relaxed/simple; bh=V7gKntkQ8bwv+lZaockCmjTF5uEC8vW5YtYKvCaU2Ck=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CZubHULUU9+pMF3a5CwOqkOnAE7TX/YjTUHnE8PbYS2QtrjnJlVv8qt+YB896uN4SApBffpFBJkPKkeRE37z+pqBF/EIGjKOBhLm00yVJTd6mn7hpcf2s4sk/OQUe3UaH39qFkc2U7w+dOOEJxCfMYEJS9KhrZtRBDTJpIhTCMI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=oYcM4koi; arc=none smtp.client-ip=209.85.215.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="oYcM4koi" Received: by mail-pg1-f182.google.com with SMTP id 41be03b00d2f7-7fcf59a41ddso1456477a12.3 for ; Fri, 13 Dec 2024 16:53:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1734137593; x=1734742393; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=aUvE2f6iOzNwCrYNdrQY+FL/vDHn4ndwLWchPd2QhtQ=; b=oYcM4koiQzAZLEfY3lLfB8Eg/+jZLKhC+RDOkk0iMvD1IZ4szKZz7VsKMcxvQFEoMi 8SjDmFAT7VHHLV14kp9igz74bRjd2zw3H4vr0pZAtavzuSmwLFR7M0DgODsqdji9NfhN Bq8wYqP4cKeQFMpZ1sz0iVdaLhQs2PenGONpI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734137593; x=1734742393; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=aUvE2f6iOzNwCrYNdrQY+FL/vDHn4ndwLWchPd2QhtQ=; b=ftqANcgf/IfIS/4FHGw3nJJlxZbNogwWa5BtdRDpcggS6yRms2ml//nnkVnntoT2pJ sTBPzDkeJqNh3mwf8ZQLlN175+brnbjHKxti4R1PA3vR3H+Ofk2ErAIHA6/6tGeRwB8U nuSvuCbA1fXCLpvUHxtIrIwbWyWSzXeK3vbFIIESFq+7f6IhJVtOM2ehH5zazTba/OM/ q90arWKoOBO2TZ+O75YlnZC6TsnZ7y71ualXRPPjlqv+a/tiePkrsq79Lv7cafLBSX7E 9uM1zD1wqLNO6/i3fOJHgwN3AkMDdL7scBqURsw52l8VKn6FG/zujIkbw3DHGyYRasaM a7IQ== X-Forwarded-Encrypted: i=1; AJvYcCVcEyu8U2IVNNYwJ2TF5gv7GwjAQFeadEQs9MlPpD2KHKqX+Od4VpTE8yHDPW0Gy1mZEySk1AYztb84Rmg=@vger.kernel.org X-Gm-Message-State: AOJu0Yyh3Bz+O3+U0rNtViHSNVoU92CUc7o8NRzGjwki3L5MBztBb+Df jYlnwYUvl/u1rRvleLqlrk/Ir+9Mivnl8VCCnV4u/Tqtzv99JcF1swiwl8gEPA== X-Gm-Gg: ASbGncu+SseWcTfY/GYQbA/+/faalE3iyC9rvS/63EkKf2Yhcig/tnGwm7UbOkhz5er pxj1SePaNM5AWIEXagXSYvKe04kxTSwby8CdGerulgwx1xLD/qmPhQ0R3m33eK6lUk7sj7u2+pd M5oGWgrY/+bElc8lHte6+qyyVbnMuBSg6xGlADpniAIhZjqoofsMCHFufddYfm5xKfUGzDsyOVV l38y1c8VlHemuhifaCjrTTU8AHXfMEyi6v4EMJDWWSh8GxMyhrzjHEqUv9Y6hFV62UaGbyDaOd5 X-Google-Smtp-Source: AGHT+IGU2S6Z3GVHm0+57veKVF9GWyDASh7uUNfkbmZbC9Zjun4Gf1t3LPe02j8X69XemOFEZkD8aQ== X-Received: by 2002:a17:90b:3c02:b0:2ee:c9d8:d01a with SMTP id 98e67ed59e1d1-2f28fb63bf1mr6635097a91.11.1734137593296; Fri, 13 Dec 2024 16:53:13 -0800 (PST) Received: from dianders.sjc.corp.google.com ([2620:15c:9d:2:ae86:44a5:253c:f9bf]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2f142f9e186sm3788270a91.41.2024.12.13.16.53.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Dec 2024 16:53:12 -0800 (PST) From: Douglas Anderson To: Catalin Marinas , Will Deacon , Mark Rutland Cc: linux-arm-msm@vger.kernel.org, Jeffrey Hugo , Julius Werner , linux-arm-kernel@lists.infradead.org, Roxana Bradescu , Trilok Soni , bjorn.andersson@oss.qualcomm.com, Douglas Anderson , stable@vger.kernel.org, James Morse , linux-kernel@vger.kernel.org Subject: [PATCH v2 3/6] arm64: errata: Add QCOM_KRYO_4XX_GOLD to the spectre_bhb_k24_list Date: Fri, 13 Dec 2024 16:52:04 -0800 Message-ID: <20241213165201.v2.3.Ie4ef54abe02e7eb0eee50f830575719bf23bda48@changeid> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog In-Reply-To: <20241214005248.198803-1-dianders@chromium.org> References: <20241214005248.198803-1-dianders@chromium.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Qualcomm Kryo 400-series Gold cores appear to have a derivative of an ARM Cortex A76 in them. Since A76 needs Spectre mitigation via looping then the Kyro 400-series Gold cores also should need Spectre mitigation via looping. Fixes: 558c303c9734 ("arm64: Mitigate spectre style branch history side cha= nnels") Cc: stable@vger.kernel.org Signed-off-by: Douglas Anderson --- The "k" value here really should come from analysis by Qualcomm, but until we can get that analysis let's choose the same value as A76: 24. Ideally someone from Qualcomm can confirm that this mitigation is needed and confirm / provide the proper "k" value. ...or do people think that this should go in the k32 list to be safe. At least adding it to the list of CPUs we don't warn about seems like a good idea since it seems very unlikely that it needs a FW mitigation when the A76 it's based on doesn't. ...or should we just drop this until Qualcomm tells us the right "k" value here? Changes in v2: - Slight change to wording and notes of KRYO_4XX_GOLD patch arch/arm64/kernel/proton-pack.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/proton-pack.c b/arch/arm64/kernel/proton-pac= k.c index 012485b75019..04c3f0567999 100644 --- a/arch/arm64/kernel/proton-pack.c +++ b/arch/arm64/kernel/proton-pack.c @@ -887,6 +887,7 @@ u8 spectre_bhb_loop_affected(int scope) MIDR_ALL_VERSIONS(MIDR_CORTEX_A76), MIDR_ALL_VERSIONS(MIDR_CORTEX_A77), MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1), + MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_4XX_GOLD), {}, }; static const struct midr_range spectre_bhb_k11_list[] =3D { --=20 2.47.1.613.gc27f4b7a9f-goog