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=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 6DBACC17440 for ; Tue, 12 Nov 2019 16:51:11 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 43A21222BD for ; Tue, 12 Nov 2019 16:51:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="o3hb+eGg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 43A21222BD 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+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=iKoYU7hTz5PPg1o8I0cbPRO65rurz0mbH0QpIB4Leyc=; b=o3hb+eGg5y713j l0e0qfPNctXJ5roRZCp47s4iHXGVcS9sic4LXqGsjhBuxllWYMxwdviBcDr3FOLgv3CFLWmzVR40d 3uPJcrM9UA+gVaT+3ujtCLE093oGxYxiplai8+73KpeZHKZrZ+j3Xw1HQ0BxDXXawX49/gdxTAZNh bdvIBem75/4Q6xfG+Mo1l+kX7fRtSIhwQdoEaGckAodQR8TbUkZhm+bEghi3VyWo6EgT5RWfKDDOp OuunFxbbJBFx+O8VkclXdIGMslobn+XPTZTvgbnH5oj5bwPj9Drp2TO5YnbwWCJswdKdMrsOELeO1 yIJnGc8N81xqOAWJ9Emw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iUZNm-0005ES-NM; Tue, 12 Nov 2019 16:51:10 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iUZNj-0005Dh-Kf for linux-arm-kernel@lists.infradead.org; Tue, 12 Nov 2019 16:51:09 +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 8DDF730E; Tue, 12 Nov 2019 08:51:06 -0800 (PST) Received: from [10.1.196.63] (e123195-lin.cambridge.arm.com [10.1.196.63]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9B1C83F534; Tue, 12 Nov 2019 08:51:05 -0800 (PST) Subject: Re: [kvm-unit-tests PATCH 10/17] arm: gic: Check for writable IGROUPR registers To: Andre Przywara , Andrew Jones , Paolo Bonzini References: <20191108144240.204202-1-andre.przywara@arm.com> <20191108144240.204202-11-andre.przywara@arm.com> From: Alexandru Elisei Message-ID: <30e68410-9ed4-91db-df2e-60272d4cd877@arm.com> Date: Tue, 12 Nov 2019 16:51:04 +0000 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20191108144240.204202-11-andre.przywara@arm.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191112_085107_722813_CB361DA9 X-CRM114-Status: GOOD ( 17.14 ) 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: Marc Zyngier , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On 11/8/19 2:42 PM, Andre Przywara wrote: > When both groups are avaiable to the non-secure side, the MMIO group > registers need to be writable, so that the group that an IRQ belongs to > can be programmed. > > Check that the group can be flipped, after having established that both > groups are usable. > > Signed-off-by: Andre Przywara > --- > arm/gic.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/arm/gic.c b/arm/gic.c > index c882a24..485ca4f 100644 > --- a/arm/gic.c > +++ b/arm/gic.c > @@ -683,6 +683,7 @@ static bool gicv3_check_security(void *gicd_base) > static void test_irq_group(void *gicd_base) > { > bool is_gicv3 = (gic_version() == 3); > + u32 reg; The return value for gic_get_irq_group is an int, not a u32. Also, maybe it should be named group instead, so it's clear what it represents. > > report_prefix_push("GROUP"); > gic_enable_defaults(); > @@ -692,6 +693,16 @@ static void test_irq_group(void *gicd_base) > if (!gicv3_check_security(gicd_base)) > return; > } > + > + /* > + * On a security aware GIC in non-secure world the IGROUPR registers > + * are RAZ/WI. KVM emulates a single-security-state GIC, so both > + * groups are available and the IGROUPR registers are writable. > + */ > + reg = gic_get_irq_group(SPI_IRQ); > + gic_set_irq_group(SPI_IRQ, !reg); > + report("IGROUPR is writable", gic_get_irq_group(SPI_IRQ) != reg); This is nitpicking, but from a consistency point of view, shouldn't you check that the new group is the value that you wrote, meaning the check should be gic_get_irq_group(SPI_IRQ) == !reg? Thanks, Alex > + gic_set_irq_group(SPI_IRQ, reg); > } > > static void spi_send(void) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel