These macros will be used by multiple VMWare modules for handling host communication.
Signed-off-by: Sinclair Yeh <[email protected]> Reviewed-by: Thomas Hellstrom <[email protected]> Reviewed-by: Alok N Kataria <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Alok Kataria <[email protected]> Cc: [email protected] Cc: [email protected] Cc: Xavier Deguillard <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> --- v2: * Keeping only the minimal common platform defines * added vmware_platform() check function v3: * Added new field to handle different hypervisor magic values v4: * Make it so that "cmd" is always the first parameter for both High-Bandwidh and non-High-Bandwidth version of the macro * Addressed comments from H. Peter Anvin on the assembly code v5: * Separate SI/DI as independent input/output arguments, given the latest update to vmw_balloon.c --- arch/x86/include/asm/vmware.h | 138 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 138 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..7d02a2b --- /dev/null +++ b/arch/x86/include/asm/vmware.h @@ -0,0 +1,138 @@ +/* + * 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 <[email protected]> + */ +#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. + * + * The last two parameters are both input and output and must be initialized. + * + * @cmd: [IN] Message Cmd + * @in_ebx: [IN] Message Len, through EBX + * @in_si: [IN] Input argument through SI, set to 0 if not used + * @in_di: [IN] Input argument through DI, set ot 0 if not used + * @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: [OUT] + * @di: [OUT] + */ +#define VMW_PORT(cmd, in_ebx, in_si, in_di, \ + port_num, magic, \ + eax, ebx, ecx, edx, si, di) \ +({ \ + asm volatile ("inl %%dx, %%eax;" : \ + "=a"(eax), \ + "=b"(ebx), \ + "=c"(ecx), \ + "=d"(edx), \ + "=S"(si), \ + "=D"(di) : \ + "a"(magic), \ + "b"(in_ebx), \ + "c"(cmd), \ + "d"(port_num), \ + "S"(in_si), \ + "D"(in_di) : \ + "memory"); \ +}) + + +/** + * 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. + * + * The last 3 parameters are both input and output and must be initialized. + * + * @cmd: [IN] Message Cmd + * @in_ecx: [IN] Message Len, through ECX + * @in_si: [IN] Input argument through SI, set to 0 if not used + * @in_di: [IN] Input argument through DI, set to 0 if not used + * @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: [OUT] + * @di: [OUT] + * @bp: [INOUT] set to 0 if not used + */ +#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ + port_num, magic, \ + eax, ebx, ecx, edx, si, di, bp) \ +({ \ + asm volatile ("push %%rbp;" \ + "xchgq %6, %%rbp;" \ + "rep outsb;" \ + "xchgq %%rbp, %6;" \ + "pop %%rbp;" : \ + "=a"(eax), \ + "=b"(ebx), \ + "=c"(ecx), \ + "=d"(edx), \ + "=S"(si), \ + "=D"(di), \ + "+r"(bp) : \ + "a"(magic), \ + "b"(cmd), \ + "c"(in_ecx), \ + "d"(port_num), \ + "S"(in_si), \ + "D"(in_di) : \ + "memory", "cc"); \ +}) + + +#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ + port_num, magic, \ + eax, ebx, ecx, edx, si, di, bp) \ +({ \ + asm volatile ("push %%rbp;" \ + "xchgq %6, %%rbp;" \ + "rep insb;" \ + "xchgq %%rbp, %6;" \ + "pop %%rbp" : \ + "=a"(eax), \ + "=b"(ebx), \ + "=c"(ecx), \ + "=d"(edx), \ + "=S"(si), \ + "=D"(di), \ + "+r"(bp) : \ + "a"(magic), \ + "b"(cmd), \ + "c"(in_ecx), \ + "d"(port_num), \ + "S"(in_si), \ + "D"(in_di) : \ + "memory", "cc"); \ +}) + + +#endif + -- 1.9.1 _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
