From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB00CC2BA83 for ; Fri, 14 Feb 2020 16:13:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9AE48246B7 for ; Fri, 14 Feb 2020 16:13:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696794; bh=LzYNPR9J2ibU/qyDs0q0oCcykAYhAy9FH0BzO5SvP3k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ytFMpqOXtkUu1WqMsXjJ+gVB4scLveS8XAVBM/kI83wVTf97vop6Vh7+NxTcZZfWL zU7GVUlwelwrtADF65IiZavFIQuJzITXC3AqDJj94gVpOf3yT/ASSU0jv6q4R8rnkN n3fkcGDa7lb5SNlK1jxbmEB3YhAiVHdGqfnDn6z0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392137AbgBNQNN (ORCPT ); Fri, 14 Feb 2020 11:13:13 -0500 Received: from mail.kernel.org ([198.145.29.99]:39918 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391992AbgBNQMZ (ORCPT ); Fri, 14 Feb 2020 11:12:25 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DB0A8246AB; Fri, 14 Feb 2020 16:12:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696744; bh=LzYNPR9J2ibU/qyDs0q0oCcykAYhAy9FH0BzO5SvP3k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cTTG+dbZ8U1/i7/r7FzmsWAJLOjV2NrGAJDzo7/wmVgXzak/8eCn0v/lfRovQahKT Q6kSpAtf2nocTQc3p80/LfdHydAgBzVBuJL7tW7D9oyT8fujg8pQkNFFpoALgPdrcz sSGYNT/ukBzDSZqVNDoeS0lLEbMoGmGXkjYrFao0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Suzuki K Poulose , Will Deacon , Mark Rutland , Ard Biesheuvel , Catalin Marinas , Sasha Levin , linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 4.19 028/252] arm64: cpufeature: Fix the type of no FP/SIMD capability Date: Fri, 14 Feb 2020 11:08:03 -0500 Message-Id: <20200214161147.15842-28-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214161147.15842-1-sashal@kernel.org> References: <20200214161147.15842-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Suzuki K Poulose [ Upstream commit 449443c03d8cfdacf7313e17779a2594ebf87e6d ] The NO_FPSIMD capability is defined with scope SYSTEM, which implies that the "absence" of FP/SIMD on at least one CPU is detected only after all the SMP CPUs are brought up. However, we use the status of this capability for every context switch. So, let us change the scope to LOCAL_CPU to allow the detection of this capability as and when the first CPU without FP is brought up. Also, the current type allows hotplugged CPU to be brought up without FP/SIMD when all the current CPUs have FP/SIMD and we have the userspace up. Fix both of these issues by changing the capability to BOOT_RESTRICTED_LOCAL_CPU_FEATURE. Fixes: 82e0191a1aa11abf ("arm64: Support systems without FP/ASIMD") Cc: Will Deacon Cc: Mark Rutland Reviewed-by: Ard Biesheuvel Reviewed-by: Catalin Marinas Signed-off-by: Suzuki K Poulose Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/kernel/cpufeature.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 220ebfa0ece6e..1375307fbe4d2 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1241,7 +1241,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = { { /* FP/SIMD is not implemented */ .capability = ARM64_HAS_NO_FPSIMD, - .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .type = ARM64_CPUCAP_BOOT_RESTRICTED_CPU_LOCAL_FEATURE, .min_field_value = 0, .matches = has_no_fpsimd, }, -- 2.20.1