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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 571BAC2BA83 for ; Thu, 13 Feb 2020 15:49:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2623420661 for ; Thu, 13 Feb 2020 15:49:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581608940; bh=7OZtItf/0dIUR/Bw9IMQi3zppq5EypSGVvdPlW5Lseg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MI19HIXkLSasMtFQ3iI90fhdsAX6bndfZuTljYHam8Zi94a54uX+rl8m8MeG1cuF7 BztnCIQxV0ClENmnHmnYkzPAYIcQXI1BL2NWOm/arnpGenI1JeRCvNuhIrJg/B21z6 vu5SjnGm3E7gadoveDg+fom4O4CFe5vpKGzv0j6w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387894AbgBMPs6 (ORCPT ); Thu, 13 Feb 2020 10:48:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:47346 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729258AbgBMP0u (ORCPT ); Thu, 13 Feb 2020 10:26:50 -0500 Received: from localhost (unknown [104.132.1.104]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DC38E2467B; Thu, 13 Feb 2020 15:26:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581607610; bh=7OZtItf/0dIUR/Bw9IMQi3zppq5EypSGVvdPlW5Lseg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=x/w3iOj3swm3lDnKoJrvuaTLrDAFYdoEaQYHqTQfbH4DA6hssUCf409r8OXcq7N94 3Ax07YqsobWfCSPgDFNktsHyrKIhwgMlV6DRo80gPASrqpvNaJHuqYU0a86y2Jc6AE uCvOSjr2XK3eHD3D2gytkjDUcrU0FXImiL0+sUCM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Will Deacon , Mark Rutland , Ard Biesheuvel , Catalin Marinas , Suzuki K Poulose Subject: [PATCH 4.19 34/52] arm64: cpufeature: Fix the type of no FP/SIMD capability Date: Thu, 13 Feb 2020 07:21:15 -0800 Message-Id: <20200213151824.124180177@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200213151810.331796857@linuxfoundation.org> References: <20200213151810.331796857@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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 commit 449443c03d8cfdacf7313e17779a2594ebf87e6d upstream. 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: Greg Kroah-Hartman --- arch/arm64/kernel/cpufeature.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1241,7 +1241,7 @@ static const struct arm64_cpu_capabiliti { /* 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, },