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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7C718C6FA82 for ; Mon, 12 Sep 2022 16:25:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=F+yYd4ER9Vdz/cpcqH95ZirBZEx1AEgqmsCBrX2LtQI=; b=JjCD0xsypX32AW 9nB50D4Hkjr6F34iFQ+xK1k0d1ASn6wS7a/JtJQxbAYm30oeE+5boo05TeVhEAMrCcsX97d7P3zS4 CeidNgeJpb7hqVW0yjqO7ZFGaCfH4hQ1WiUfClTnpWoCO9zlOznmZzQHMi64rjMvvTNbKjdnoaWEB 7xTqgUbcsVycPDzQkduPq7r7UFN01GYxG72VcZRNH6Scioq4WoabqTtFbcQ1X37rJap5d1RXbUth/ eRTNyTQX/+Ody+gKVmWaUhb3ApzFtJx1morpB1xrk+eKyB2SbkySOIyJSsWlLHLp5GXIP5HJXjtKm FmpFuQkPxxeA9NobdJ2w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oXmE9-00BZ8s-5t; Mon, 12 Sep 2022 16:24:05 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oXmCZ-00BYHW-M8 for linux-arm-kernel@lists.infradead.org; Mon, 12 Sep 2022 16:22:29 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id F0AD7106F; Mon, 12 Sep 2022 09:22:31 -0700 (PDT) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7D11C3F73D; Mon, 12 Sep 2022 09:22:24 -0700 (PDT) From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: ardb@kernel.org, catalin.marinas@arm.com, james.morse@arm.com, joey.gouly@arm.com, mark.rutland@arm.com, maz@kernel.org, will@kernel.org Subject: [PATCH v2 3/8] arm64: alternatives: proton-pack: prepare for cap changes Date: Mon, 12 Sep 2022 17:22:05 +0100 Message-Id: <20220912162210.3626215-4-mark.rutland@arm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220912162210.3626215-1-mark.rutland@arm.com> References: <20220912162210.3626215-1-mark.rutland@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220912_092227_834173_1E45E334 X-CRM114-Status: GOOD ( 11.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The spectre patching callbacks use cpus_have_final_cap(), and subsequent patches will make it invalid to call cpus_have_final_cap() before alternatives patching has completed. In preparation for said change, this patch modifies the spectre patching callbacks use cpus_have_cap(). This is not subject to patching, and will dynamically check the cpu_hwcaps array, which is functionally equivalent to the existing behaviour. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland Reviewed-by: Joey Gouly Cc: Ard Biesheuvel Cc: Catalin Marinas Cc: James Morse Cc: Marc Zyngier Cc: Will Deacon --- arch/arm64/kernel/proton-pack.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/proton-pack.c b/arch/arm64/kernel/proton-pack.c index 40be3a7c2c531..8010b2e573fac 100644 --- a/arch/arm64/kernel/proton-pack.c +++ b/arch/arm64/kernel/proton-pack.c @@ -586,7 +586,7 @@ void __init spectre_v4_patch_fw_mitigation_enable(struct alt_instr *alt, if (spectre_v4_mitigations_off()) return; - if (cpus_have_final_cap(ARM64_SSBS)) + if (cpus_have_cap(ARM64_SSBS)) return; if (spectre_v4_mitigations_dynamic()) -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel