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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 069A7C282DD for ; Thu, 23 May 2019 10:36:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CB0F72168B for ; Thu, 23 May 2019 10:36:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730793AbfEWKgO (ORCPT ); Thu, 23 May 2019 06:36:14 -0400 Received: from foss.arm.com ([217.140.101.70]:43142 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730658AbfEWKfr (ORCPT ); Thu, 23 May 2019 06:35:47 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id BCCA415BF; Thu, 23 May 2019 03:35:46 -0700 (PDT) Received: from usa.arm.com (e107155-lin.cambridge.arm.com [10.1.196.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A06F23F718; Thu, 23 May 2019 03:35:44 -0700 (PDT) From: Sudeep Holla To: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Cc: Sudeep Holla , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Christoffer Dall , Marc Zyngier , James Morse , Suzuki K Pouloze , Catalin Marinas , Will Deacon , Julien Thierry Subject: [PATCH v2 11/15] arm64: KVM/debug: trap all accesses to SPE controls at EL1 Date: Thu, 23 May 2019 11:34:58 +0100 Message-Id: <20190523103502.25925-12-sudeep.holla@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190523103502.25925-1-sudeep.holla@arm.com> References: <20190523103502.25925-1-sudeep.holla@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that we have all the save/restore mechanism in place, lets enable trapping of accesses to SPE profiling buffer controls at EL1 to EL2. This will also change the translation regime used by buffer from EL2 stage 1 to EL1 stage 1 on VHE systems. Signed-off-by: Sudeep Holla --- arch/arm64/kvm/hyp/switch.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 844f0dd7a7f0..881901825a85 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -110,6 +110,7 @@ static void activate_traps_vhe(struct kvm_vcpu *vcpu) write_sysreg(val, cpacr_el1); + write_sysreg(vcpu->arch.mdcr_el2 | 2 << MDCR_EL2_E2PB_SHIFT, mdcr_el2); write_sysreg(kvm_get_hyp_vector(), vbar_el1); } NOKPROBE_SYMBOL(activate_traps_vhe); @@ -127,6 +128,7 @@ static void __hyp_text __activate_traps_nvhe(struct kvm_vcpu *vcpu) __activate_traps_fpsimd32(vcpu); } + write_sysreg(vcpu->arch.mdcr_el2 | 2 << MDCR_EL2_E2PB_SHIFT, mdcr_el2); write_sysreg(val, cptr_el2); } -- 2.17.1