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 09451C2D0E2 for ; Tue, 22 Sep 2020 11:48:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C130B23600 for ; Tue, 22 Sep 2020 11:48:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726868AbgIVLsZ (ORCPT ); Tue, 22 Sep 2020 07:48:25 -0400 Received: from mga07.intel.com ([134.134.136.100]:39044 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726653AbgIVLnr (ORCPT ); Tue, 22 Sep 2020 07:43:47 -0400 IronPort-SDR: SowYU8QK1fCeQGFWPSgPhvKL1BClLIDC0YafGaj1kwXNKMWpJXDzjp0KZTqk3Ha7eZUUFIXPmK uIQZ89yXV8fA== X-IronPort-AV: E=McAfee;i="6000,8403,9751"; a="224732826" X-IronPort-AV: E=Sophos;i="5.77,290,1596524400"; d="scan'208";a="224732826" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2020 04:43:41 -0700 IronPort-SDR: yQZeYdwBfrsXzSoTdmRXDez7SNEDT9LS8+112XtFtZ1rLNV9XbXNjK50CtMyhCU8dg8813uLaa 5EC9rc3o0Paw== X-IronPort-AV: E=Sophos;i="5.77,290,1596524400"; d="scan'208";a="511172150" Received: from shsi6026.sh.intel.com (HELO localhost) ([10.239.147.135]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2020 04:43:37 -0700 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 , Sean Christopherson , Yu Wang , Reinette Chatre , Shuo Liu , Yakui Zhao , Zhi Wang , Dave Hansen , Dan Williams , Fengwei Yin , Zhenyu Wang Subject: [PATCH v4 02/17] x86/acrn: Introduce acrn_{setup, remove}_intr_handler() Date: Tue, 22 Sep 2020 19:42:56 +0800 Message-Id: <20200922114311.38804-3-shuo.a.liu@intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200922114311.38804-1-shuo.a.liu@intel.com> References: <20200922114311.38804-1-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 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 | 16 ++++++++++++++++ 2 files changed, 24 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..42e88d01ccf9 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 +59,18 @@ 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