From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9DAE7C433DF for ; Tue, 25 Aug 2020 02:50:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 844A2204EC for ; Tue, 25 Aug 2020 02:50:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728272AbgHYCuq (ORCPT ); Mon, 24 Aug 2020 22:50:46 -0400 Received: from mga18.intel.com ([134.134.136.126]:37715 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726882AbgHYCun (ORCPT ); Mon, 24 Aug 2020 22:50:43 -0400 IronPort-SDR: AuwOuu/gzwybZ/4T45yOW8Ai7iMWIX+k9xKTRDv5gVyqw8STovJW4Q+DdNQBRQ9SfHowJQWQfD WCXtQ9D1NizQ== X-IronPort-AV: E=McAfee;i="6000,8403,9723"; a="143690750" X-IronPort-AV: E=Sophos;i="5.76,350,1592895600"; d="scan'208";a="143690750" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2020 19:50:43 -0700 IronPort-SDR: 8OZdsr4heA13TcngIN0C2OSTLJzK0W2zO9RYnHWx2kbsHbY3bspIbwjL/Iwz8H84WnEKQMKhzf liuT+io3Spxg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,350,1592895600"; d="scan'208";a="312409708" Received: from shsi6026.sh.intel.com ([10.239.147.135]) by orsmga002.jf.intel.com with ESMTP; 24 Aug 2020 19:50:39 -0700 From: shuo.a.liu@intel.com To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , "H . Peter Anvin" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Sean Christopherson , Yu Wang , Reinette Chatre , x86@kernel.org, Shuo Liu , Yakui Zhao , Zhi Wang , Dave Hansen , Dan Williams , Fengwei Yin , Zhenyu Wang Subject: [PATCH 02/17] x86/acrn: Introduce acrn_{setup, remove}_intr_handler() Date: Tue, 25 Aug 2020 10:45:02 +0800 Message-Id: <20200825024516.16766-3-shuo.a.liu@intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200825024516.16766-1-shuo.a.liu@intel.com> References: <20200825024516.16766-1-shuo.a.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shuo Liu The ACRN Hypervisor builds an I/O request when a trapped I/O access happens in User VM. Then, ACRN Hypervisor issues an upcall by sending a notification interrupt to the Service VM. HSM in the Service VM needs to hook the notification interrupt to handle I/O requests. Notification interrupts from ACRN Hypervisor are already supported and a, currently uninitialized, callback called. Export two APIs for HSM to setup/remove its callback. Originally-by: Yakui Zhao Signed-off-by: Shuo Liu Reviewed-by: Zhi Wang Reviewed-by: Reinette Chatre Cc: Dave Hansen Cc: Sean Christopherson Cc: Dan Williams Cc: Fengwei Yin Cc: Zhi Wang Cc: Zhenyu Wang Cc: Yu Wang Cc: Reinette Chatre --- arch/x86/include/asm/acrn.h | 8 ++++++++ arch/x86/kernel/cpu/acrn.c | 19 +++++++++++++++++++ 2 files changed, 27 insertions(+) create mode 100644 arch/x86/include/asm/acrn.h diff --git a/arch/x86/include/asm/acrn.h b/arch/x86/include/asm/acrn.h new file mode 100644 index 000000000000..ff259b69cde7 --- /dev/null +++ b/arch/x86/include/asm/acrn.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_ACRN_H +#define _ASM_X86_ACRN_H + +void acrn_setup_intr_handler(void (*handler)(void)); +void acrn_remove_intr_handler(void); + +#endif /* _ASM_X86_ACRN_H */ diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c index 0b2c03943ac6..bd1d7e759a0f 100644 --- a/arch/x86/kernel/cpu/acrn.c +++ b/arch/x86/kernel/cpu/acrn.c @@ -9,7 +9,11 @@ * */ +#define pr_fmt(fmt) "acrn: " fmt + #include + +#include #include #include #include @@ -55,6 +59,21 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_acrn_hv_callback) set_irq_regs(old_regs); } +void acrn_setup_intr_handler(void (*handler)(void)) +{ + if (acrn_intr_handler) + pr_warn("Overwrite the acrn_intr_handler.\n"); + + acrn_intr_handler = handler; +} +EXPORT_SYMBOL_GPL(acrn_setup_intr_handler); + +void acrn_remove_intr_handler(void) +{ + acrn_intr_handler = NULL; +} +EXPORT_SYMBOL_GPL(acrn_remove_intr_handler); + const __initconst struct hypervisor_x86 x86_hyper_acrn = { .name = "ACRN", .detect = acrn_detect, -- 2.28.0