| svm_support.S (284894) | svm_support.S (285015) |
|---|---|
| 1/*- 2 * Copyright (c) 2013, Anish Gupta (akgupt3@gmail.com) 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * | 1/*- 2 * Copyright (c) 2013, Anish Gupta (akgupt3@gmail.com) 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * |
| 26 * $FreeBSD: stable/10/sys/amd64/vmm/amd/svm_support.S 284894 2015-06-27 22:48:22Z neel $ | 26 * $FreeBSD: stable/10/sys/amd64/vmm/amd/svm_support.S 285015 2015-07-01 19:46:57Z neel $ |
| 27 */ 28#include <machine/asmacros.h> 29 30#include "svm_assym.h" 31 32/* 33 * Be friendly to DTrace FBT's prologue/epilogue pattern matching. 34 * 35 * They are also responsible for saving/restoring the host %rbp across VMRUN. 36 */ 37#define VENTER push %rbp ; mov %rsp,%rbp 38#define VLEAVE pop %rbp 39 40#define VMLOAD .byte 0x0f, 0x01, 0xda 41#define VMRUN .byte 0x0f, 0x01, 0xd8 42#define VMSAVE .byte 0x0f, 0x01, 0xdb 43 44/* | 27 */ 28#include <machine/asmacros.h> 29 30#include "svm_assym.h" 31 32/* 33 * Be friendly to DTrace FBT's prologue/epilogue pattern matching. 34 * 35 * They are also responsible for saving/restoring the host %rbp across VMRUN. 36 */ 37#define VENTER push %rbp ; mov %rsp,%rbp 38#define VLEAVE pop %rbp 39 40#define VMLOAD .byte 0x0f, 0x01, 0xda 41#define VMRUN .byte 0x0f, 0x01, 0xd8 42#define VMSAVE .byte 0x0f, 0x01, 0xdb 43 44/* |
| 45 * svm_launch(uint64_t vmcb, struct svm_regctx *gctx) | 45 * svm_launch(uint64_t vmcb, struct svm_regctx *gctx, struct pcpu *pcpu) |
| 46 * %rdi: physical address of VMCB 47 * %rsi: pointer to guest context | 46 * %rdi: physical address of VMCB 47 * %rsi: pointer to guest context |
| 48 * %rdx: pointer to the pcpu data |
|
| 48 */ 49ENTRY(svm_launch) 50 VENTER 51 | 49 */ 50ENTRY(svm_launch) 51 VENTER 52 |
| 53 /* save pointer to the pcpu data */ 54 push %rdx 55 |
|
| 52 /* 53 * Host register state saved across a VMRUN. 54 * 55 * All "callee saved registers" except: 56 * %rsp: because it is preserved by the processor across VMRUN. 57 * %rbp: because it is saved/restored by the function prologue/epilogue. 58 */ 59 push %rbx --- 51 unchanged lines hidden (view full) --- 111 112 /* Restore host state */ 113 pop %r15 114 pop %r14 115 pop %r13 116 pop %r12 117 pop %rbx 118 | 56 /* 57 * Host register state saved across a VMRUN. 58 * 59 * All "callee saved registers" except: 60 * %rsp: because it is preserved by the processor across VMRUN. 61 * %rbp: because it is saved/restored by the function prologue/epilogue. 62 */ 63 push %rbx --- 51 unchanged lines hidden (view full) --- 115 116 /* Restore host state */ 117 pop %r15 118 pop %r14 119 pop %r13 120 pop %r12 121 pop %rbx 122 |
| 123 /* Restore %GS.base to point to the host's pcpu data */ 124 pop %rdx 125 mov %edx, %eax 126 shr $32, %rdx 127 mov $MSR_GSBASE, %ecx 128 wrmsr 129 |
|
| 119 VLEAVE 120 ret 121END(svm_launch) | 130 VLEAVE 131 ret 132END(svm_launch) |