From patchwork Thu Dec 12 17:28:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 11288853 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 08E7F930 for ; Thu, 12 Dec 2019 17:29:53 +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 DBFAC2173E for ; Thu, 12 Dec 2019 17:29:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qB3G1eUP" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DBFAC2173E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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=bombadil.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=xdsuVbmhbLZIphhC7GGtG40hrHUDoom9m8yCikJoRAQ=; b=qB3G1eUPQKlY7j ArGtRFog6p15OlqdSy/RNM9nYkM2xeW4EnXDzg5+6/QfKXmNTNxduPVexwr+gwIBpmTiVHBcOBWyq Odov9RfkmzAvn7aViioeWOrDDf6ty2MOBoDjrBKYf7vZkyYm6yBWHvxkGUQtqX6cwLqMEYBwvxu1M jRXnv8B4v+ChANae4r+uUuteTERKiMYH5EsY1dlDTpz+NcMQZnE5QBxB22GC9H1Oauf/GSKewb1M/ LLglpwqzdWD83md3ae742bbUs+5l9Kddy3Ri85uh+2VxANoRlQ12xwc6Q9sabK78Dgk6uWUKmRw3Z qUEzLPc0NL2T//2vybKw==; 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 1ifSHe-000642-7K; Thu, 12 Dec 2019 17:29:50 +0000 Received: from inca-roads.misterjones.org ([213.251.177.50]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ifSGf-0005AI-7X for linux-arm-kernel@lists.infradead.org; Thu, 12 Dec 2019 17:28:52 +0000 Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by cheepnis.misterjones.org with esmtpsa (TLSv1.2:DHE-RSA-AES128-GCM-SHA256:128) (Exim 4.80) (envelope-from ) id 1ifSGY-00069s-Qa; Thu, 12 Dec 2019 18:28:43 +0100 From: Marc Zyngier To: Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= Subject: [PATCH 5/8] KVM: arm64: Don't log IMP DEF sysreg traps Date: Thu, 12 Dec 2019 17:28:21 +0000 Message-Id: <20191212172824.11523-6-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191212172824.11523-1-maz@kernel.org> References: <20191212172824.11523-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: pbonzini@redhat.com, rkrcmar@redhat.com, alexandru.elisei@arm.com, ard.biesheuvel@linaro.org, christoffer.dall@arm.com, eric.auger@redhat.com, james.morse@arm.com, justin.he@arm.com, mark.rutland@arm.com, linmiaohe@huawei.com, steven.price@arm.com, will@kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on cheepnis.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191212_092849_411217_3728EDBA X-CRM114-Status: UNSURE ( 7.92 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.0 (+) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (1.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 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: Mark Rutland , Miaohe Lin , Jia He , kvm@vger.kernel.org, Ard Biesheuvel , Will Deacon , Suzuki K Poulose , Christoffer Dall , Steven Price , Eric Auger , James Morse , Julien Thierry , Alexandru Elisei , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Mark Rutland We don't intend to support IMPLEMENATION DEFINED system registers, but have to trap them (and emulate them as UNDEFINED). These traps aren't interesting to the system administrator or to the KVM developers, so let's not bother logging when we do so. Signed-off-by: Mark Rutland Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20191205180652.18671-3-mark.rutland@arm.com --- arch/arm64/kvm/sys_regs.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index e8bf08e09f78..bd2ac3796d8d 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2229,6 +2229,12 @@ int kvm_handle_cp14_32(struct kvm_vcpu *vcpu, struct kvm_run *run) NULL, 0); } +static bool is_imp_def_sys_reg(struct sys_reg_params *params) +{ + // See ARM DDI 0487E.a, section D12.3.2 + return params->Op0 == 3 && (params->CRn & 0b1011) == 0b1011; +} + static int emulate_sys_reg(struct kvm_vcpu *vcpu, struct sys_reg_params *params) { @@ -2244,6 +2250,8 @@ static int emulate_sys_reg(struct kvm_vcpu *vcpu, if (likely(r)) { perform_access(vcpu, params, r); + } else if (is_imp_def_sys_reg(params)) { + kvm_inject_undefined(vcpu); } else { print_sys_reg_msg(params, "Unsupported guest sys_reg access at: %lx [%08lx]\n",