From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938541AbdAIGgl (ORCPT ); Mon, 9 Jan 2017 01:36:41 -0500 Received: from outprodmail02.cc.columbia.edu ([128.59.72.51]:52009 "EHLO outprodmail02.cc.columbia.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S939624AbdAIG0B (ORCPT ); Mon, 9 Jan 2017 01:26:01 -0500 From: Jintack Lim To: christoffer.dall@linaro.org, marc.zyngier@arm.com, pbonzini@redhat.com, rkrcmar@redhat.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, vladimir.murzin@arm.com, suzuki.poulose@arm.com, mark.rutland@arm.com, james.morse@arm.com, lorenzo.pieralisi@arm.com, kevin.brodsky@arm.com, wcohen@redhat.com, shankerd@codeaurora.org, geoff@infradead.org, andre.przywara@arm.com, eric.auger@redhat.com, anna-maria@linutronix.de, shihwei@cs.columbia.edu, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jintack@cs.columbia.edu Subject: [RFC 20/55] KVM: arm64: Forward CPACR_EL1 traps to the guest hypervisor Date: Mon, 9 Jan 2017 01:24:16 -0500 Message-Id: <1483943091-1364-21-git-send-email-jintack@cs.columbia.edu> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1483943091-1364-1-git-send-email-jintack@cs.columbia.edu> References: <1483943091-1364-1-git-send-email-jintack@cs.columbia.edu> X-No-Spam-Score: Local Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Forward CPACR_EL1 traps to the guest hypervisor if it has configured the virtual CPTR_EL2 to do so. Signed-off-by: Jintack Lim --- arch/arm64/kvm/sys_regs.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 321ecbc..e66f40d 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -951,6 +951,11 @@ static bool access_cpacr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, const struct sys_reg_desc *r) { + /* Forward this trap to the guest hypervisor if it expects */ + if (!vcpu_mode_el2(vcpu) && + (vcpu_el2_reg(vcpu, CPTR_EL2) & CPTR_EL2_TCPAC)) + return kvm_inject_nested_sync(vcpu, kvm_vcpu_get_hsr(vcpu)); + access_rw(p, &vcpu_sys_reg(vcpu, r->reg)); return true; } -- 1.9.1