From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161349AbdAIG2y (ORCPT ); Mon, 9 Jan 2017 01:28:54 -0500 Received: from outprodmail01.cc.columbia.edu ([128.59.72.39]:38644 "EHLO outprodmail01.cc.columbia.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S939842AbdAIG0l (ORCPT ); Mon, 9 Jan 2017 01:26:41 -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 48/55] KVM: arm64: Emulate TLBI instruction Date: Mon, 9 Jan 2017 01:24:44 -0500 Message-Id: <1483943091-1364-49-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 From: Christoffer Dall Currently, we flush ALL shadow stage-2 page tables on the tlbi instruction execution. We may be able to do this more efficiently by considering the vttbr_el2 value of the guest hypervisor, but leave it for now. Signed-off-by: Christoffer Dall Signed-off-by: Jintack Lim --- arch/arm64/kvm/sys_regs.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index ddb641c..b0a057d 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2013,8 +2013,14 @@ static int emulate_sys_reg(struct kvm_vcpu *vcpu, static int emulate_tlbi(struct kvm_vcpu *vcpu, struct sys_reg_params *params) { - /* TODO: support tlbi instruction emulation*/ - kvm_inject_undefined(vcpu); + /* + * We unmap ALL stage-2 page tables on tlbi instruction. + * We may make it more efficient by looking at the exact tlbi + * instruction. + */ + stage2_unmap_vm(vcpu->kvm); + kvm_nested_s2_unmap(vcpu); + return 1; } -- 1.9.1