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,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,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 4471FC63798 for ; Mon, 16 Nov 2020 14:48:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 08980206F9 for ; Mon, 16 Nov 2020 14:48:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="WxMEnTqp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730554AbgKPOsU (ORCPT ); Mon, 16 Nov 2020 09:48:20 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:56900 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730112AbgKPOsQ (ORCPT ); Mon, 16 Nov 2020 09:48:16 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0AGEjYv6034236; Mon, 16 Nov 2020 14:47:58 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2020-01-29; bh=8aIFM+fL+yGS57Luev6i506IgnxC9JGFRXYGXuRKYiU=; b=WxMEnTqpwIofi7edXhIXzC4lLtCAc7QueSxnc5LYaP4FoQM7SgTQbGLQsCCS2kf6Gy2E TUwy2dLpna/enXsTxIrPiz1GfxA/AHkDaLcMYDXG4O4GPj6lFe61WVDy2Hl8kXVF4hHv Ngsqs90L1nLAoc1BMajqImQsj7Ru2i2S5MZfsEMFh0EosFuiXUJvrljk20EZbTgaaojo mgQNMwEETqIb/WlB9YflwdksVKLGEAnu+iyuq/keGf09F1l3GGSV/QZSiwU9mRHKD48U yXpGkcqrCt7LV7WT6NTWaOL/Pp2+PPzug4FhXqUpg7OdeHR/heJtacyEd654m/VelNEf RA== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by userp2120.oracle.com with ESMTP id 34t7vmwb1u-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 16 Nov 2020 14:47:58 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0AGEjD28164514; Mon, 16 Nov 2020 14:45:57 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3020.oracle.com with ESMTP id 34umcww2qx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 16 Nov 2020 14:45:57 +0000 Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 0AGEjuIJ023620; Mon, 16 Nov 2020 14:45:56 GMT Received: from localhost.localdomain (/92.157.91.83) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 16 Nov 2020 06:45:55 -0800 From: Alexandre Chartre To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, linux-kernel@vger.kernel.org, thomas.lendacky@amd.com, jroedel@suse.de Cc: konrad.wilk@oracle.com, jan.setjeeilers@oracle.com, junaids@google.com, oweisse@google.com, rppt@linux.vnet.ibm.com, graf@amazon.de, mgross@linux.intel.com, kuzuno@gmail.com, alexandre.chartre@oracle.com Subject: [RFC][PATCH v2 02/21] x86/entry: Update asm_call_on_stack to support more function arguments Date: Mon, 16 Nov 2020 15:47:38 +0100 Message-Id: <20201116144757.1920077-3-alexandre.chartre@oracle.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20201116144757.1920077-1-alexandre.chartre@oracle.com> References: <20201116144757.1920077-1-alexandre.chartre@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9806 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxscore=0 phishscore=0 spamscore=0 bulkscore=0 mlxlogscore=999 malwarescore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011160090 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9806 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 suspectscore=0 malwarescore=0 bulkscore=0 impostorscore=0 lowpriorityscore=0 spamscore=0 adultscore=0 mlxscore=0 priorityscore=1501 phishscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011160090 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Update the asm_call_on_stack() function so that it can be invoked with a function having up to three arguments instead of only one. Signed-off-by: Alexandre Chartre --- arch/x86/entry/entry_64.S | 15 +++++++++++---- arch/x86/include/asm/irq_stack.h | 8 ++++++++ 2 files changed, 19 insertions(+), 4 deletions(-) diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index cad08703c4ad..c42948aca0a8 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -759,9 +759,14 @@ SYM_CODE_END(.Lbad_gs) /* * rdi: New stack pointer points to the top word of the stack * rsi: Function pointer - * rdx: Function argument (can be NULL if none) + * rdx: Function argument 1 (can be NULL if none) + * rcx: Function argument 2 (can be NULL if none) + * r8 : Function argument 3 (can be NULL if none) */ SYM_FUNC_START(asm_call_on_stack) +SYM_FUNC_START(asm_call_on_stack_1) +SYM_FUNC_START(asm_call_on_stack_2) +SYM_FUNC_START(asm_call_on_stack_3) SYM_INNER_LABEL(asm_call_sysvec_on_stack, SYM_L_GLOBAL) SYM_INNER_LABEL(asm_call_irq_on_stack, SYM_L_GLOBAL) /* @@ -777,15 +782,17 @@ SYM_INNER_LABEL(asm_call_irq_on_stack, SYM_L_GLOBAL) */ mov %rsp, (%rdi) mov %rdi, %rsp - /* Move the argument to the right place */ + mov %rsi, %rax + /* Move arguments to the right place */ mov %rdx, %rdi - + mov %rcx, %rsi + mov %r8, %rdx 1: .pushsection .discard.instr_begin .long 1b - . .popsection - CALL_NOSPEC rsi + CALL_NOSPEC rax 2: .pushsection .discard.instr_end diff --git a/arch/x86/include/asm/irq_stack.h b/arch/x86/include/asm/irq_stack.h index 775816965c6a..359427216336 100644 --- a/arch/x86/include/asm/irq_stack.h +++ b/arch/x86/include/asm/irq_stack.h @@ -13,6 +13,14 @@ static __always_inline bool irqstack_active(void) } void asm_call_on_stack(void *sp, void (*func)(void), void *arg); + +void asm_call_on_stack_1(void *sp, void (*func)(void), + void *arg1); +void asm_call_on_stack_2(void *sp, void (*func)(void), + void *arg1, void *arg2); +void asm_call_on_stack_3(void *sp, void (*func)(void), + void *arg1, void *arg2, void *arg3); + void asm_call_sysvec_on_stack(void *sp, void (*func)(struct pt_regs *regs), struct pt_regs *regs); void asm_call_irq_on_stack(void *sp, void (*func)(struct irq_desc *desc), -- 2.18.4