| /* SPDX-License-Identifier: GPL-2.0+ OR MIT */ |
| /************************************************************************** |
| * |
| * Copyright 2016-2021 VMware, Inc., Palo Alto, CA., USA |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| ************************************************************************** |
| * |
| * Based on code from vmware.c and vmmouse.c. |
| * Author: |
| * Sinclair Yeh <syeh@vmware.com> |
| */ |
| #ifndef _VMWGFX_MSG_X86_H |
| #define _VMWGFX_MSG_X86_H |
| |
| |
| #if defined(__i386__) || defined(__x86_64__) |
| |
| #include <asm/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 |
| * @flags: [IN] hypercall flags + [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, \ |
| flags, magic, \ |
| eax, ebx, ecx, edx, si, di) \ |
| ({ \ |
| asm volatile (VMWARE_HYPERCALL : \ |
| "=a"(eax), \ |
| "=b"(ebx), \ |
| "=c"(ecx), \ |
| "=d"(edx), \ |
| "=S"(si), \ |
| "=D"(di) : \ |
| "a"(magic), \ |
| "b"(in_ebx), \ |
| "c"(cmd), \ |
| "d"(flags), \ |
| "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 |
| * @flags: [IN] hypercall flags + [channel id] |
| * @magic: [IN] hypervisor magic value |
| * @bp: [IN] |
| * @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] |
| */ |
| #ifdef __x86_64__ |
| |
| #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ |
| flags, magic, bp, \ |
| eax, ebx, ecx, edx, si, di) \ |
| ({ \ |
| asm volatile ( \ |
| UNWIND_HINT_SAVE \ |
| "push %%rbp;" \ |
| UNWIND_HINT_UNDEFINED \ |
| "mov %12, %%rbp;" \ |
| VMWARE_HYPERCALL_HB_OUT \ |
| "pop %%rbp;" \ |
| UNWIND_HINT_RESTORE : \ |
| "=a"(eax), \ |
| "=b"(ebx), \ |
| "=c"(ecx), \ |
| "=d"(edx), \ |
| "=S"(si), \ |
| "=D"(di) : \ |
| "a"(magic), \ |
| "b"(cmd), \ |
| "c"(in_ecx), \ |
| "d"(flags), \ |
| "S"(in_si), \ |
| "D"(in_di), \ |
| "r"(bp) : \ |
| "memory", "cc"); \ |
| }) |
| |
| |
| #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ |
| flags, magic, bp, \ |
| eax, ebx, ecx, edx, si, di) \ |
| ({ \ |
| asm volatile ( \ |
| UNWIND_HINT_SAVE \ |
| "push %%rbp;" \ |
| UNWIND_HINT_UNDEFINED \ |
| "mov %12, %%rbp;" \ |
| VMWARE_HYPERCALL_HB_IN \ |
| "pop %%rbp;" \ |
| UNWIND_HINT_RESTORE : \ |
| "=a"(eax), \ |
| "=b"(ebx), \ |
| "=c"(ecx), \ |
| "=d"(edx), \ |
| "=S"(si), \ |
| "=D"(di) : \ |
| "a"(magic), \ |
| "b"(cmd), \ |
| "c"(in_ecx), \ |
| "d"(flags), \ |
| "S"(in_si), \ |
| "D"(in_di), \ |
| "r"(bp) : \ |
| "memory", "cc"); \ |
| }) |
| |
| #elif defined(__i386__) |
| |
| /* |
| * In the 32-bit version of this macro, we store bp in a memory location |
| * because we've ran out of registers. |
| * Now we can't reference that memory location while we've modified |
| * %esp or %ebp, so we first push it on the stack, just before we push |
| * %ebp, and then when we need it we read it from the stack where we |
| * just pushed it. |
| */ |
| #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ |
| flags, magic, bp, \ |
| eax, ebx, ecx, edx, si, di) \ |
| ({ \ |
| asm volatile ("push %12;" \ |
| "push %%ebp;" \ |
| "mov 0x04(%%esp), %%ebp;" \ |
| VMWARE_HYPERCALL_HB_OUT \ |
| "pop %%ebp;" \ |
| "add $0x04, %%esp;" : \ |
| "=a"(eax), \ |
| "=b"(ebx), \ |
| "=c"(ecx), \ |
| "=d"(edx), \ |
| "=S"(si), \ |
| "=D"(di) : \ |
| "a"(magic), \ |
| "b"(cmd), \ |
| "c"(in_ecx), \ |
| "d"(flags), \ |
| "S"(in_si), \ |
| "D"(in_di), \ |
| "m"(bp) : \ |
| "memory", "cc"); \ |
| }) |
| |
| |
| #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ |
| flags, magic, bp, \ |
| eax, ebx, ecx, edx, si, di) \ |
| ({ \ |
| asm volatile ("push %12;" \ |
| "push %%ebp;" \ |
| "mov 0x04(%%esp), %%ebp;" \ |
| VMWARE_HYPERCALL_HB_IN \ |
| "pop %%ebp;" \ |
| "add $0x04, %%esp;" : \ |
| "=a"(eax), \ |
| "=b"(ebx), \ |
| "=c"(ecx), \ |
| "=d"(edx), \ |
| "=S"(si), \ |
| "=D"(di) : \ |
| "a"(magic), \ |
| "b"(cmd), \ |
| "c"(in_ecx), \ |
| "d"(flags), \ |
| "S"(in_si), \ |
| "D"(in_di), \ |
| "m"(bp) : \ |
| "memory", "cc"); \ |
| }) |
| #endif /* defined(__i386__) */ |
| |
| #endif /* defined(__i386__) || defined(__x86_64__) */ |
| |
| #endif /* _VMWGFX_MSG_X86_H */ |
