From patchwork Fri Jun 21 09:38:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 11009217 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 01830186E for ; Fri, 21 Jun 2019 09:39:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E5300289CA for ; Fri, 21 Jun 2019 09:39:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D9224289E8; Fri, 21 Jun 2019 09:39:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 76E4C289F9 for ; Fri, 21 Jun 2019 09:39:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726716AbfFUJjo (ORCPT ); Fri, 21 Jun 2019 05:39:44 -0400 Received: from foss.arm.com ([217.140.110.172]:54022 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726426AbfFUJjo (ORCPT ); Fri, 21 Jun 2019 05:39:44 -0400 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 E0D1614FF; Fri, 21 Jun 2019 02:39:43 -0700 (PDT) Received: from filthy-habits.cambridge.arm.com (filthy-habits.cambridge.arm.com [10.1.197.61]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8CAF63F246; Fri, 21 Jun 2019 02:39:42 -0700 (PDT) From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: Andre Przywara , Christoffer Dall , Dave Martin , Jintack Lim , Julien Thierry , James Morse , Suzuki K Poulose Subject: [PATCH 20/59] KVM: arm64: nv: Trap CPACR_EL1 access in virtual EL2 Date: Fri, 21 Jun 2019 10:38:04 +0100 Message-Id: <20190621093843.220980-21-marc.zyngier@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190621093843.220980-1-marc.zyngier@arm.com> References: <20190621093843.220980-1-marc.zyngier@arm.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jintack Lim For the same reason we trap virtual memory register accesses in virtual EL2, we trap CPACR_EL1 access too; We allow the virtual EL2 mode to access EL1 system register state instead of the virtual EL2 one. Signed-off-by: Jintack Lim Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_arm.h | 3 ++- arch/arm64/kvm/hyp/switch.c | 2 ++ arch/arm64/kvm/sys_regs.c | 2 +- 3 files changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index b2e363ac624d..48e15af2bece 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -278,12 +278,13 @@ #define CPTR_EL2_TFP_SHIFT 10 /* Hyp Coprocessor Trap Register */ -#define CPTR_EL2_TCPAC (1 << 31) +#define CPTR_EL2_TCPAC (1U << 31) #define CPTR_EL2_TTA (1 << 20) #define CPTR_EL2_TFP (1 << CPTR_EL2_TFP_SHIFT) #define CPTR_EL2_TZ (1 << 8) #define CPTR_EL2_RES1 0x000032ff /* known RES1 bits in CPTR_EL2 */ #define CPTR_EL2_DEFAULT CPTR_EL2_RES1 +#define CPTR_EL2_E2H_TCPAC (1U << 31) /* Hyp Debug Configuration Register bits */ #define MDCR_EL2_TPMS (1 << 14) diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 791b26570347..62359c7c3d6b 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -108,6 +108,8 @@ static void activate_traps_vhe(struct kvm_vcpu *vcpu) val &= ~CPACR_EL1_FPEN; __activate_traps_fpsimd32(vcpu); } + if (vcpu_mode_el2(vcpu) && !vcpu_el2_e2h_is_set(vcpu)) + val |= CPTR_EL2_E2H_TCPAC; write_sysreg(val, cpacr_el1); diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 7fc87657382d..1d1312425cf2 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1773,7 +1773,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { ID_UNALLOCATED(7,7), { SYS_DESC(SYS_SCTLR_EL1), access_vm_reg, reset_val, SCTLR_EL1, 0x00C50078 }, - { SYS_DESC(SYS_CPACR_EL1), NULL, reset_val, CPACR_EL1, 0 }, + { SYS_DESC(SYS_CPACR_EL1), access_rw, reset_val, CPACR_EL1, 0 }, { SYS_DESC(SYS_ZCR_EL1), NULL, reset_val, ZCR_EL1, 0, .visibility = sve_visibility }, { SYS_DESC(SYS_TTBR0_EL1), access_vm_reg, reset_unknown, TTBR0_EL1 }, { SYS_DESC(SYS_TTBR1_EL1), access_vm_reg, reset_unknown, TTBR1_EL1 },