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 DF02EC6FD20 for ; Fri, 24 Mar 2023 14:48:25 +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=JsE9q5DJtRY+RCzoTv04uiLeUjGubMaAfu+hcsLtBgw=; b=esffrNu5sFJyLS cSdjmNHEA2tyd1nEhBMZZjkRnbS/M7R6+GdYNGZhwwEuPaXvWUT0W5yM82ANYO9R9vL95SpGkvZAk hZhPk7q9QClW41rf93zIGZInpTmRV7AyHn5Coolrnb3J5BYPMoieabTK0ZPKtG/weXmlCpiRbQSjQ UwAHhA8qDn5SYD896WmRwW9Xy5zWBddOPdQNcVGVyWOg/PTNue0M7KsRrs0mOdX9zQk+wiPk/q3TD BMyyJBEB4Gp5Krq9Lj2QL9c0WUyUJtcTq1esYiTec+3bnuPH0oGn/LA0eaX55P1qVyP6Hawg2+47r XnK13UXtFNtjI/2lRDlw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pfihf-004gn7-0Q; Fri, 24 Mar 2023 14:47:39 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pfihN-004gfs-0Y for linux-arm-kernel@lists.infradead.org; Fri, 24 Mar 2023 14:47:23 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6741D62B4E; Fri, 24 Mar 2023 14:47:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A7C74C4339E; Fri, 24 Mar 2023 14:47:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679669239; bh=VzmiC9FX+ZfNMXCHEN+Bh2kvmeKVWDoUDgNLI+FCBiQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GmzatZepj6CuLUwaLuIbpHOcDqR9PcbY8yD9IQHxIBGNqAgtXqfL2TwxGdblu2wu8 HvQGI1NWmJsgUSV9SIa65pmVW82XBClnfGyYEhrGv1bbdryvA4X43BCExt+E4BbE5e tJGGsgvtXQTpdIc9PVe8xdRk1aHbqcXtvzbPjMwJoiAiNiPNz1+hSHP8KvFSx/Tfjv gIxW7mcPn7SyXaxVBOLAkFPe3KDgjC0/DVmgsOgw9g6vZnd3mQz9/0FC2gWRK861Y7 kjOosundyGBH/J4TLgqmCwkl1ZE5R1G6buGEodH50hBaaK8qE0HmUBso5PaOKTct1X b5UDRjoCjjSoQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1pfihJ-002qBP-MW; Fri, 24 Mar 2023 14:47:17 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Ricardo Koller , Simon Veith , Reiji Watanabe , Colton Lewis , Joey Gouly , dwmw2@infradead.org Subject: [PATCH v3 03/18] arm64: Add HAS_ECV_CNTPOFF capability Date: Fri, 24 Mar 2023 14:46:49 +0000 Message-Id: <20230324144704.4193635-4-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230324144704.4193635-1-maz@kernel.org> References: <20230324144704.4193635-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, james.morse@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, ricarkol@google.com, sveith@amazon.de, reijiw@google.com, coltonlewis@google.com, joey.gouly@arm.com, dwmw2@infradead.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230324_074721_282473_AC9DFA3C X-CRM114-Status: GOOD ( 13.27 ) 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 Add the probing code for the FEAT_ECV variant that implements CNTPOFF_EL2. Why it is optional is a mystery, but let's try and detect it. Reviewed-by: Reiji Watanabe Reviewed-by: Colton Lewis Signed-off-by: Marc Zyngier --- arch/arm64/kernel/cpufeature.c | 11 +++++++++++ arch/arm64/tools/cpucaps | 1 + 2 files changed, 12 insertions(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 2e3e55139777..c331c49a7d19 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2223,6 +2223,17 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .sign = FTR_UNSIGNED, .min_field_value = 1, }, + { + .desc = "Enhanced Counter Virtualization (CNTPOFF)", + .capability = ARM64_HAS_ECV_CNTPOFF, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .matches = has_cpuid_feature, + .sys_reg = SYS_ID_AA64MMFR0_EL1, + .field_pos = ID_AA64MMFR0_EL1_ECV_SHIFT, + .field_width = 4, + .sign = FTR_UNSIGNED, + .min_field_value = ID_AA64MMFR0_EL1_ECV_CNTPOFF, + }, #ifdef CONFIG_ARM64_PAN { .desc = "Privileged Access Never", diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 37b1340e9646..40ba95472594 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -23,6 +23,7 @@ HAS_DCPOP HAS_DIT HAS_E0PD HAS_ECV +HAS_ECV_CNTPOFF HAS_EPAN HAS_GENERIC_AUTH HAS_GENERIC_AUTH_ARCH_QARMA3 -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel