Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751302AbaKYQeG (ORCPT ); Tue, 25 Nov 2014 11:34:06 -0500 Received: from static.88-198-71-155.clients.your-server.de ([88.198.71.155]:48202 "EHLO socrates.bennee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751208AbaKYQeB (ORCPT ); Tue, 25 Nov 2014 11:34:01 -0500 From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, christoffer.dall@linaro.org, marc.zyngier@arm.com, peter.maydell@linaro.org, agraf@suse.de Cc: jan.kiszka@siemens.com, dahi@linux.vnet.ibm.com, r65777@freescale.com, bp@suse.de, pbonzini@redhat.com, =?UTF-8?q?Alex=20Benn=C3=A9e?= , Gleb Natapov , Jonathan Corbet , Russell King , linux-doc@vger.kernel.org (open list:DOCUMENTATION), linux-kernel@vger.kernel.org (open list) Subject: [PATCH 3/7] KVM: arm: guest debug, add stub KVM_SET_GUEST_DEBUG ioctl Date: Tue, 25 Nov 2014 16:10:01 +0000 Message-Id: <1416931805-23223-4-git-send-email-alex.bennee@linaro.org> X-Mailer: git-send-email 2.1.3 In-Reply-To: <1416931805-23223-1-git-send-email-alex.bennee@linaro.org> References: <1416931805-23223-1-git-send-email-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 127.0.0.1 X-SA-Exim-Mail-From: alex.bennee@linaro.org X-SA-Exim-Scanned: No (on socrates.bennee.com); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This commit adds a stub function to support the KVM_SET_GUEST_DEBUG ioctl. Currently any operation flag will return EINVAL. Actual functionality will be added with further patches. Signed-off-by: Alex Bennée . diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 7610eaa..2c6386e 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2570,7 +2570,7 @@ handled. 4.87 KVM_SET_GUEST_DEBUG Capability: KVM_CAP_SET_GUEST_DEBUG -Architectures: x86, s390, ppc +Architectures: x86, s390, ppc, arm64 Type: vcpu ioctl Parameters: struct kvm_guest_debug (in) Returns: 0 on success; -1 on error diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index 9e193c8..a0ff410 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -180,6 +180,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_PSCI: case KVM_CAP_ARM_PSCI_0_2: case KVM_CAP_READONLY_MEM: + case KVM_CAP_SET_GUEST_DEBUG: r = 1; break; case KVM_CAP_COALESCED_MMIO: @@ -302,7 +303,34 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) { - return -EINVAL; + /* If it's not enabled clear all flags */ + if (!(dbg->control & KVM_GUESTDBG_ENABLE)) { + vcpu->guest_debug = 0; + return 0; + } + + vcpu->guest_debug = dbg->control; + kvm_info("%s: guest_debug is 0x%lx\n", __func__, vcpu->guest_debug); + + /* Single Step */ + if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { + kvm_info("SS requested, not yet implemented\n"); + return -EINVAL; + } + + /* Software Break Points */ + if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { + kvm_info("SW BP support requested, not yet implemented\n"); + return -EINVAL; + } + + /* Hardware assisted Break and Watch points */ + if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { + kvm_info("HW BP support requested, not yet implemented\n"); + return -EINVAL; + } + + return 0; } -- 2.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/