Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757176AbbLAWR7 (ORCPT ); Tue, 1 Dec 2015 17:17:59 -0500 Received: from smtp-outbound-1.vmware.com ([208.91.2.12]:44144 "EHLO smtp-outbound-1.vmware.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756998AbbLAWR5 (ORCPT ); Tue, 1 Dec 2015 17:17:57 -0500 From: "Sinclair Yeh" To: x86@kernel.org Cc: Sinclair Yeh , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Alok Kataria , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Xavier Deguillard Subject: [PATCH 1/6] x86: Add VMWare Host Communication Macros Date: Tue, 1 Dec 2015 14:18:47 -0800 Message-Id: <1449008332-9394-1-git-send-email-syeh@vmware.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1449008047-8252-1-git-send-email-syeh@vmware.com> References: <1449008047-8252-1-git-send-email-syeh@vmware.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5944 Lines: 149 These macros will be used by multiple VMWare modules for handling host communication. v2: * Keeping only the minimal common platform defines * added vmware_platform() check function v3: * Added new field to handle different hypervisor magic values Signed-off-by: Sinclair Yeh Reviewed-by: Thomas Hellstrom Reviewed-by: Alok N Kataria Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Alok Kataria Cc: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Cc: Xavier Deguillard --- arch/x86/include/asm/vmware.h | 110 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 arch/x86/include/asm/vmware.h diff --git a/arch/x86/include/asm/vmware.h b/arch/x86/include/asm/vmware.h new file mode 100644 index 0000000..32bf99b --- /dev/null +++ b/arch/x86/include/asm/vmware.h @@ -0,0 +1,110 @@ +/* + * Copyright (C) 2015, VMware, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + * + * Based on code from vmware.c and vmmouse.c. + * Author: + * Sinclair Yeh + */ +#ifndef _ASM_X86_VMWARE_H +#define _ASM_X86_VMWARE_H + + +/** + * Hypervisor-specific bi-directional communication channel. Should never + * execute on bare metal hardware. The caller must make sure to check for + * supported hypervisor before using these macros. + * + * Several of the parameters are both input and output and must be initialized. + * + * @in1: [IN] Message Len or Message Cmd (HB) + * @in2: [IN] Message Len (HB) or Message Cmd + * @port_num: [IN] port number + [channel id] + * @magic: [IN] hypervisor magic value + * @eax: [OUT] value of EAX register + * @ebx: [OUT] e.g. status from an HB message status command + * @ecx: [OUT] e.g. status from a non-HB message status command + * @edx: [OUT] e.g. channel id + * @si: [INOUT] set to 0 if not used + * @di: [INOUT] set to 0 if not used + * @bp: [INOUT] set to 0 if not used + */ +#define VMW_PORT(in1, in2, port_num, magic, eax, ebx, ecx, edx, si, di) \ +({ \ + __asm__ __volatile__ ("inl %%dx" : \ + "=a"(eax), \ + "=b"(ebx), \ + "=c"(ecx), \ + "=d"(edx), \ + "=S"(si), \ + "=D"(di) : \ + "a"(magic), \ + "b"(in1), \ + "c"(in2), \ + "d"(port_num), \ + "S"(si), \ + "D"(di) : \ + "memory"); \ +}) + + +#define VMW_PORT_HB_OUT(in1, in2, port_num, magic, \ + eax, ebx, ecx, edx, si, di, bp) \ +({ \ + __asm__ __volatile__ ("movq %13, %%rbp;" \ + "cld; rep outsb; " \ + "movq %%rbp, %6" : \ + "=a"(eax), \ + "=b"(ebx), \ + "=c"(ecx), \ + "=d"(edx), \ + "=S"(si), \ + "=D"(di), \ + "=r"(bp) : \ + "a"(magic), \ + "b"(in1), \ + "c"(in2), \ + "d"(port_num), \ + "S"(si), \ + "D"(di), \ + "r"(bp) : \ + "memory", "cc"); \ +}) + + +#define VMW_PORT_HB_IN(in1, in2, port_num, magic, \ + eax, ebx, ecx, edx, si, di, bp) \ +({ \ + __asm__ __volatile__ ("push %%rbp; movq %13, %%rbp;" \ + "cld; rep insb; " \ + "movq %%rbp, %6;pop %%rbp" : \ + "=a"(eax), \ + "=b"(ebx), \ + "=c"(ecx), \ + "=d"(edx), \ + "=S"(si), \ + "=D"(di), \ + "=r"(bp) : \ + "a"(magic), \ + "b"(in1), \ + "c"(in2), \ + "d"(port_num), \ + "S"(si), \ + "D"(di), \ + "r"(bp) : \ + "memory", "cc"); \ +}) + + +#endif + -- 1.9.1 -- 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/