Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758866AbYCRFe5 (ORCPT ); Tue, 18 Mar 2008 01:34:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754196AbYCRFYf (ORCPT ); Tue, 18 Mar 2008 01:24:35 -0400 Received: from gw.goop.org ([64.81.55.164]:37847 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752076AbYCRFYH (ORCPT ); Tue, 18 Mar 2008 01:24:07 -0400 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [PATCH 24 of 31] xen: add support for callbackops hypercall X-Mercurial-Node: e0520177f1a12cbc3598b7d7c55440b005308359 Message-Id: In-Reply-To: Date: Mon, 17 Mar 2008 16:37:15 -0700 From: Jeremy Fitzhardinge To: Ingo Molnar Cc: LKML , Ian Campbell Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5140 Lines: 152 Signed-off-by: Jeremy Fitzhardinge --- include/asm-x86/xen/hypercall.h | 6 ++ include/asm-x86/xen/interface.h | 4 + include/xen/interface/callback.h | 102 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 112 insertions(+) diff --git a/include/asm-x86/xen/hypercall.h b/include/asm-x86/xen/hypercall.h --- a/include/asm-x86/xen/hypercall.h +++ b/include/asm-x86/xen/hypercall.h @@ -161,6 +161,12 @@ return _hypercall4(int, set_callbacks, event_selector, event_address, failsafe_selector, failsafe_address); +} + +static inline int +HYPERVISOR_callback_op(int cmd, void *arg) +{ + return _hypercall2(int, callback_op, cmd, arg); } static inline int diff --git a/include/asm-x86/xen/interface.h b/include/asm-x86/xen/interface.h --- a/include/asm-x86/xen/interface.h +++ b/include/asm-x86/xen/interface.h @@ -171,6 +171,10 @@ unsigned long pad[5]; /* sizeof(struct vcpu_info) == 64 */ }; +struct xen_callback { + unsigned long cs; + unsigned long eip; +}; #endif /* !__ASSEMBLY__ */ /* diff --git a/include/xen/interface/callback.h b/include/xen/interface/callback.h new file mode 100644 --- /dev/null +++ b/include/xen/interface/callback.h @@ -0,0 +1,102 @@ +/****************************************************************************** + * callback.h + * + * Register guest OS callbacks with Xen. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (c) 2006, Ian Campbell + */ + +#ifndef __XEN_PUBLIC_CALLBACK_H__ +#define __XEN_PUBLIC_CALLBACK_H__ + +#include "xen.h" + +/* + * Prototype for this hypercall is: + * long callback_op(int cmd, void *extra_args) + * @cmd == CALLBACKOP_??? (callback operation). + * @extra_args == Operation-specific extra arguments (NULL if none). + */ + +/* ia64, x86: Callback for event delivery. */ +#define CALLBACKTYPE_event 0 + +/* x86: Failsafe callback when guest state cannot be restored by Xen. */ +#define CALLBACKTYPE_failsafe 1 + +/* x86/64 hypervisor: Syscall by 64-bit guest app ('64-on-64-on-64'). */ +#define CALLBACKTYPE_syscall 2 + +/* + * x86/32 hypervisor: Only available on x86/32 when supervisor_mode_kernel + * feature is enabled. Do not use this callback type in new code. + */ +#define CALLBACKTYPE_sysenter_deprecated 3 + +/* x86: Callback for NMI delivery. */ +#define CALLBACKTYPE_nmi 4 + +/* + * x86: sysenter is only available as follows: + * - 32-bit hypervisor: with the supervisor_mode_kernel feature enabled + * - 64-bit hypervisor: 32-bit guest applications on Intel CPUs + * ('32-on-32-on-64', '32-on-64-on-64') + * [nb. also 64-bit guest applications on Intel CPUs + * ('64-on-64-on-64'), but syscall is preferred] + */ +#define CALLBACKTYPE_sysenter 5 + +/* + * x86/64 hypervisor: Syscall by 32-bit guest app on AMD CPUs + * ('32-on-32-on-64', '32-on-64-on-64') + */ +#define CALLBACKTYPE_syscall32 7 + +/* + * Disable event deliver during callback? This flag is ignored for event and + * NMI callbacks: event delivery is unconditionally disabled. + */ +#define _CALLBACKF_mask_events 0 +#define CALLBACKF_mask_events (1U << _CALLBACKF_mask_events) + +/* + * Register a callback. + */ +#define CALLBACKOP_register 0 +struct callback_register { + uint16_t type; + uint16_t flags; + struct xen_callback address; +}; + +/* + * Unregister a callback. + * + * Not all callbacks can be unregistered. -EINVAL will be returned if + * you attempt to unregister such a callback. + */ +#define CALLBACKOP_unregister 1 +struct callback_unregister { + uint16_t type; + uint16_t _unused; +}; + +#endif /* __XEN_PUBLIC_CALLBACK_H__ */ -- 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/