From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762956AbYDCTiW (ORCPT ); Thu, 3 Apr 2008 15:38:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761070AbYDCTdN (ORCPT ); Thu, 3 Apr 2008 15:33:13 -0400 Received: from bzq-179-150-194.static.bezeqint.net ([212.179.150.194]:53040 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760099AbYDCTc7 (ORCPT ); Thu, 3 Apr 2008 15:32:59 -0400 From: Avi Kivity To: kvm-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, Marcelo Tosatti Subject: [PATCH 18/35] KVM: add basic paravirt support Date: Thu, 3 Apr 2008 22:32:33 +0300 Message-Id: <1207251170-5013-19-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.4.5 In-Reply-To: <1207251170-5013-1-git-send-email-avi@qumranet.com> References: <1207251170-5013-1-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Marcelo Tosatti Add basic KVM paravirt support. Avoid vm-exits on IO delays. Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity --- arch/x86/kvm/x86.c | 1 + include/asm-x86/kvm_para.h | 3 ++- include/linux/kvm.h | 1 + 3 files changed, 4 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 621a8e3..1b9e695 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -820,6 +820,7 @@ int kvm_dev_ioctl_check_extension(long ext) case KVM_CAP_EXT_CPUID: case KVM_CAP_CLOCKSOURCE: case KVM_CAP_PIT: + case KVM_CAP_NOP_IO_DELAY: r = 1; break; case KVM_CAP_VAPIC: diff --git a/include/asm-x86/kvm_para.h b/include/asm-x86/kvm_para.h index 5ab7d3d..ed5df3a 100644 --- a/include/asm-x86/kvm_para.h +++ b/include/asm-x86/kvm_para.h @@ -10,7 +10,8 @@ * paravirtualization, the appropriate feature bit should be checked. */ #define KVM_CPUID_FEATURES 0x40000001 -#define KVM_FEATURE_CLOCKSOURCE 0 +#define KVM_FEATURE_CLOCKSOURCE 0 +#define KVM_FEATURE_NOP_IO_DELAY 1 #define MSR_KVM_WALL_CLOCK 0x11 #define MSR_KVM_SYSTEM_TIME 0x12 diff --git a/include/linux/kvm.h b/include/linux/kvm.h index a2f3274..76f0947 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -237,6 +237,7 @@ struct kvm_vapic_addr { #define KVM_CAP_NR_VCPUS 9 /* returns max vcpus per vm */ #define KVM_CAP_NR_MEMSLOTS 10 /* returns max memory slots per vm */ #define KVM_CAP_PIT 11 +#define KVM_CAP_NOP_IO_DELAY 12 /* * ioctls for VM fds -- 1.5.4.5