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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 329EAC433EF for ; Sun, 17 Oct 2021 12:46:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 161BC60F36 for ; Sun, 17 Oct 2021 12:46:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242385AbhJQMtC (ORCPT ); Sun, 17 Oct 2021 08:49:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:39218 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245741AbhJQMsw (ORCPT ); Sun, 17 Oct 2021 08:48:52 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (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 6E8DB60EE3; Sun, 17 Oct 2021 12:46:42 +0000 (UTC) Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mc5V6-00HKfO-4M; Sun, 17 Oct 2021 13:42:52 +0100 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Daniel Lezcano , Will Deacon Cc: Mark Rutland , Thomas Gleixner , Peter Shier , Raghavendra Rao Ananta , Ricardo Koller , Oliver Upton , Catalin Marinas , Linus Walleij , kernel-team@android.com Subject: [PATCH v4 14/17] arm64: Add a capability for FEAT_ECV Date: Sun, 17 Oct 2021 13:42:22 +0100 Message-Id: <20211017124225.3018098-15-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211017124225.3018098-1-maz@kernel.org> References: <20211017124225.3018098-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, daniel.lezcano@linaro.org, will@kernel.org, mark.rutland@arm.com, tglx@linutronix.de, pshier@google.com, rananta@google.com, ricarkol@google.com, oupton@google.com, catalin.marinas@arm.com, linus.walleij@linaro.org, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a new capability to detect the Enhanced Counter Virtualization feature (FEAT_ECV). Reviewed-by: Oliver Upton Acked-by: Will Deacon Signed-off-by: Marc Zyngier --- arch/arm64/kernel/cpufeature.c | 10 ++++++++++ arch/arm64/tools/cpucaps | 1 + 2 files changed, 11 insertions(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index f8a3067d10c6..26b11ce8fff6 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1926,6 +1926,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .sign = FTR_UNSIGNED, .min_field_value = 1, }, + { + .desc = "Enhanced Counter Virtualization", + .capability = ARM64_HAS_ECV, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .matches = has_cpuid_feature, + .sys_reg = SYS_ID_AA64MMFR0_EL1, + .field_pos = ID_AA64MMFR0_ECV_SHIFT, + .sign = FTR_UNSIGNED, + .min_field_value = 1, + }, #ifdef CONFIG_ARM64_PAN { .desc = "Privileged Access Never", diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 49305c2e6dfd..7a7c58acd8f0 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -18,6 +18,7 @@ HAS_CRC32 HAS_DCPODP HAS_DCPOP HAS_E0PD +HAS_ECV HAS_EPAN HAS_GENERIC_AUTH HAS_GENERIC_AUTH_ARCH -- 2.30.2