From patchwork Sat Sep 12 15:37:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 11771945 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6133E746 for ; Sat, 12 Sep 2020 15:38:00 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 082CA20796 for ; Sat, 12 Sep 2020 15:38:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="3WITEXGm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 082CA20796 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=TjvxwHG85xzcwv0CimRU3mnG4oAaVdQH8jdfF+oJ+P4=; b=3WITEXGmH7dfY0AX7d9hIw3Fi IC5LqHmCMFGqAPb0HCkrETTSZ0QF5Abnjd6WZp9QDDIHfLYRfbYEFzGgbA8jDlFGxeOL0QFycUldi LJupSrvvyl4HNbAIFWaSJFVrL962V1LlW2LV4AXr0zEEs/2hNoZNTlTueAoUGX6sk+Qd7TeTJPiDr ePfTMuBelpHAryhvJKqLfTHLB6t7mYC2uOoZnIlK3Rbm/YBv0qKFyuPvJPKitduRyW8WykcmTfdSi z1ZCLo5BZ71N3ghEwIiiWCsXIMTCEMkAkstRFvOHmK0+fCdZ0HkRnzZ/Zgs+GSwhTAnWQCT1iLy9t uQmLewjUA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kH7Zd-00057q-2K; Sat, 12 Sep 2020 15:36:21 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kH7ZW-00056s-Ti for linux-arm-kernel@lists.infradead.org; Sat, 12 Sep 2020 15:36:15 +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 D52A511B3; Sat, 12 Sep 2020 08:36:10 -0700 (PDT) Received: from monolith.localdoman (unknown [10.37.8.20]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 758F03F68F; Sat, 12 Sep 2020 08:36:09 -0700 (PDT) From: Alexandru Elisei To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH v3 1/2] irqchip/gicv3: Spell out when pseudo-NMIs are enabled Date: Sat, 12 Sep 2020 16:37:06 +0100 Message-Id: <20200912153707.667731-2-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200912153707.667731-1-alexandru.elisei@arm.com> References: <20200912153707.667731-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200912_113615_060642_3F75B2CE X-CRM114-Status: GOOD ( 13.56 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: maz@kernel.org, tglx@linutronix.de, will@kernel.org, jason@lakedaemon.net, catalin.marinas@arm.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org When NMIs cannot be enabled, the driver prints a message stating that unambiguously. When they are enabled, the only feedback we get is a message regarding the use of synchronization for ICC_PMR_EL1 writes, which is not as useful for a user who is not intimately familiar with how NMIs are implemented. Let's make it obvious that pseudo-NMIs are enabled. Keep the message about using a barrier for ICC_PMR_EL1 writes, because it has a non-negligible impact on performance. Signed-off-by: Alexandru Elisei --- drivers/irqchip/irq-gic-v3.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 850842f27bee..aa9b43d412b2 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1564,8 +1564,8 @@ static void gic_enable_nmi_support(void) if (gic_read_ctlr() & ICC_CTLR_EL1_PMHE_MASK) static_branch_enable(&gic_pmr_sync); - pr_info("%s ICC_PMR_EL1 synchronisation\n", - static_branch_unlikely(&gic_pmr_sync) ? "Forcing" : "Relaxing"); + pr_info("Pseudo-NMIs enabled using %s ICC_PMR_EL1 synchronisation\n", + static_branch_unlikely(&gic_pmr_sync) ? "forced" : "relaxed"); static_branch_enable(&supports_pseudo_nmis);