From patchwork Tue Mar 5 03:47:29 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 2216971 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 63C10DF24C for ; Tue, 5 Mar 2013 03:59:10 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UCizP-00029U-Mx; Tue, 05 Mar 2013 03:56:31 +0000 Received: from inca-roads.misterjones.org ([213.251.177.50]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UCixV-0000zO-44 for linux-arm-kernel@lists.infradead.org; Tue, 05 Mar 2013 03:54:35 +0000 Received: from [118.143.64.134] (helo=why.wild-wind.fr.eu.org) by inca-roads.misterjones.org with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.69) (envelope-from ) id 1UCire-0002NK-W1; Tue, 05 Mar 2013 04:48:31 +0100 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH 13/29] arm64: KVM: MMIO access backend Date: Tue, 5 Mar 2013 03:47:29 +0000 Message-Id: <1362455265-24165-14-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 1.7.12.4 In-Reply-To: <1362455265-24165-1-git-send-email-marc.zyngier@arm.com> References: <1362455265-24165-1-git-send-email-marc.zyngier@arm.com> X-SA-Exim-Connect-IP: 118.143.64.134 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, catalin.marinas@arm.com X-SA-Exim-Mail-From: marc.zyngier@arm.com X-SA-Exim-Scanned: No (on inca-roads.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130304_225433_283456_E0325CCF X-CRM114-Status: GOOD ( 13.00 ) X-Spam-Score: -1.2 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.7 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: catalin.marinas@arm.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Define the necessary structures to perform an MMIO access. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_mmio.h | 59 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 arch/arm64/include/asm/kvm_mmio.h diff --git a/arch/arm64/include/asm/kvm_mmio.h b/arch/arm64/include/asm/kvm_mmio.h new file mode 100644 index 0000000..fc2f689 --- /dev/null +++ b/arch/arm64/include/asm/kvm_mmio.h @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2012 - Virtual Open Systems and Columbia University + * Author: Christoffer Dall + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef __ARM64_KVM_MMIO_H__ +#define __ARM64_KVM_MMIO_H__ + +#include +#include +#include + +/* + * This is annoying. The mmio code requires this, even if we don't + * need any decoding. To be fixed. + */ +struct kvm_decode { + unsigned long rt; + bool sign_extend; +}; + +/* + * The in-kernel MMIO emulation code wants to use a copy of run->mmio, + * which is an anonymous type. Use our own type instead. + */ +struct kvm_exit_mmio { + phys_addr_t phys_addr; + u8 data[8]; + u32 len; + bool is_write; +}; + +static inline void kvm_prepare_mmio(struct kvm_run *run, + struct kvm_exit_mmio *mmio) +{ + run->mmio.phys_addr = mmio->phys_addr; + run->mmio.len = mmio->len; + run->mmio.is_write = mmio->is_write; + memcpy(run->mmio.data, mmio->data, mmio->len); + run->exit_reason = KVM_EXIT_MMIO; +} + +int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run); +int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run, + phys_addr_t fault_ipa); + +#endif /* __ARM64_KVM_MMIO_H__ */