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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 1D0BEC433DB for ; Sun, 7 Feb 2021 03:12:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E577764E76 for ; Sun, 7 Feb 2021 03:12:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229731AbhBGDLt (ORCPT ); Sat, 6 Feb 2021 22:11:49 -0500 Received: from mga07.intel.com ([134.134.136.100]:29185 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229636AbhBGDLq (ORCPT ); Sat, 6 Feb 2021 22:11:46 -0500 IronPort-SDR: NQN6RGXNWU8kFkKQVi55PxoJu33yAexUkvlqWFsTMIZVdjlMB+sz4GZ3FEab67pRTblOBSJnaR rvj+aWfXwtCg== X-IronPort-AV: E=McAfee;i="6000,8403,9887"; a="245652183" X-IronPort-AV: E=Sophos;i="5.81,158,1610438400"; d="scan'208";a="245652183" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2021 19:11:03 -0800 IronPort-SDR: gp0rlJ4F1s1LPBuk5vwpUT/dGNqtvrQ3CA6jaOIzmBHP8rgzALP2+9p0miyEoq3h1/wKMNFiza hO6tGWPExAQA== X-IronPort-AV: E=Sophos;i="5.81,158,1610438400"; d="scan'208";a="584618071" Received: from shsi6026.sh.intel.com (HELO localhost) ([10.239.147.88]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2021 19:11:00 -0800 From: shuo.a.liu@intel.com To: linux-kernel@vger.kernel.org, x86@kernel.org Cc: Greg Kroah-Hartman , "H . Peter Anvin" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Yu Wang , Reinette Chatre , Shuo Liu , Yakui Zhao , Zhi Wang , Borislav Petkov , Dave Hansen , Sean Christopherson , Dan Williams , Fengwei Yin , Zhenyu Wang Subject: [PATCH v9 02/18] x86/acrn: Introduce acrn_{setup, remove}_intr_handler() Date: Sun, 7 Feb 2021 11:10:24 +0800 Message-Id: <20210207031040.49576-3-shuo.a.liu@intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210207031040.49576-1-shuo.a.liu@intel.com> References: <20210207031040.49576-1-shuo.a.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 Acked-by: Borislav Petkov Cc: Dave Hansen Cc: Sean Christopherson Cc: Dan Williams Cc: Fengwei Yin Cc: Zhi Wang Cc: Zhenyu Wang Cc: Yu Wang Cc: Reinette Chatre Cc: Greg Kroah-Hartman --- arch/x86/include/asm/acrn.h | 8 ++++++++ arch/x86/kernel/cpu/acrn.c | 14 ++++++++++++++ 2 files changed, 22 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..e0c181781905 100644 --- a/arch/x86/kernel/cpu/acrn.c +++ b/arch/x86/kernel/cpu/acrn.c @@ -10,6 +10,8 @@ */ #include + +#include #include #include #include @@ -55,6 +57,18 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_acrn_hv_callback) set_irq_regs(old_regs); } +void acrn_setup_intr_handler(void (*handler)(void)) +{ + 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