vhost-user: don't merge regions with different fds
[qemu/cris-port.git] / target-i386 / mpx_helper.c
blob1bf717af05bb3b1a3c0246d88d60477e7f5d3d6d
1 /*
2 * x86 MPX helpers
4 * Copyright (c) 2015 Red Hat, Inc.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "cpu.h"
21 #include "exec/helper-proto.h"
22 #include "exec/cpu_ldst.h"
25 void cpu_sync_bndcs_hflags(CPUX86State *env)
27 uint32_t hflags = env->hflags;
28 uint32_t hflags2 = env->hflags2;
29 uint32_t bndcsr;
31 if ((hflags & HF_CPL_MASK) == 3) {
32 bndcsr = env->bndcs_regs.cfgu;
33 } else {
34 bndcsr = env->msr_bndcfgs;
37 if ((env->cr[4] & CR4_OSXSAVE_MASK)
38 && (env->xcr0 & XSTATE_BNDCSR)
39 && (bndcsr & BNDCFG_ENABLE)) {
40 hflags |= HF_MPX_EN_MASK;
41 } else {
42 hflags &= ~HF_MPX_EN_MASK;
45 if (bndcsr & BNDCFG_BNDPRESERVE) {
46 hflags2 |= HF2_MPX_PR_MASK;
47 } else {
48 hflags2 &= ~HF2_MPX_PR_MASK;
51 env->hflags = hflags;
52 env->hflags2 = hflags2;
55 void helper_bndck(CPUX86State *env, uint32_t fail)
57 if (unlikely(fail)) {
58 env->bndcs_regs.sts = 1;
59 raise_exception_ra(env, EXCP05_BOUND, GETPC());
63 static uint64_t lookup_bte64(CPUX86State *env, uint64_t base, uintptr_t ra)
65 uint64_t bndcsr, bde, bt;
67 if ((env->hflags & HF_CPL_MASK) == 3) {
68 bndcsr = env->bndcs_regs.cfgu;
69 } else {
70 bndcsr = env->msr_bndcfgs;
73 bde = (extract64(base, 20, 28) << 3) + (extract64(bndcsr, 20, 44) << 12);
74 bt = cpu_ldq_data_ra(env, bde, ra);
75 if ((bt & 1) == 0) {
76 env->bndcs_regs.sts = bde | 2;
77 raise_exception_ra(env, EXCP05_BOUND, ra);
80 return (extract64(base, 3, 17) << 5) + (bt & ~7);
83 static uint32_t lookup_bte32(CPUX86State *env, uint32_t base, uintptr_t ra)
85 uint32_t bndcsr, bde, bt;
87 if ((env->hflags & HF_CPL_MASK) == 3) {
88 bndcsr = env->bndcs_regs.cfgu;
89 } else {
90 bndcsr = env->msr_bndcfgs;
93 bde = (extract32(base, 12, 20) << 2) + (bndcsr & TARGET_PAGE_MASK);
94 bt = cpu_ldl_data_ra(env, bde, ra);
95 if ((bt & 1) == 0) {
96 env->bndcs_regs.sts = bde | 2;
97 raise_exception_ra(env, EXCP05_BOUND, ra);
100 return (extract32(base, 2, 10) << 4) + (bt & ~3);
103 uint64_t helper_bndldx64(CPUX86State *env, target_ulong base, target_ulong ptr)
105 uintptr_t ra = GETPC();
106 uint64_t bte, lb, ub, pt;
108 bte = lookup_bte64(env, base, ra);
109 lb = cpu_ldq_data_ra(env, bte, ra);
110 ub = cpu_ldq_data_ra(env, bte + 8, ra);
111 pt = cpu_ldq_data_ra(env, bte + 16, ra);
113 if (pt != ptr) {
114 lb = ub = 0;
116 env->mmx_t0.MMX_Q(0) = ub;
117 return lb;
120 uint64_t helper_bndldx32(CPUX86State *env, target_ulong base, target_ulong ptr)
122 uintptr_t ra = GETPC();
123 uint32_t bte, lb, ub, pt;
125 bte = lookup_bte32(env, base, ra);
126 lb = cpu_ldl_data_ra(env, bte, ra);
127 ub = cpu_ldl_data_ra(env, bte + 4, ra);
128 pt = cpu_ldl_data_ra(env, bte + 8, ra);
130 if (pt != ptr) {
131 lb = ub = 0;
133 return ((uint64_t)ub << 32) | lb;
136 void helper_bndstx64(CPUX86State *env, target_ulong base, target_ulong ptr,
137 uint64_t lb, uint64_t ub)
139 uintptr_t ra = GETPC();
140 uint64_t bte;
142 bte = lookup_bte64(env, base, ra);
143 cpu_stq_data_ra(env, bte, lb, ra);
144 cpu_stq_data_ra(env, bte + 8, ub, ra);
145 cpu_stq_data_ra(env, bte + 16, ptr, ra);
148 void helper_bndstx32(CPUX86State *env, target_ulong base, target_ulong ptr,
149 uint64_t lb, uint64_t ub)
151 uintptr_t ra = GETPC();
152 uint32_t bte;
154 bte = lookup_bte32(env, base, ra);
155 cpu_stl_data_ra(env, bte, lb, ra);
156 cpu_stl_data_ra(env, bte + 4, ub, ra);
157 cpu_stl_data_ra(env, bte + 8, ptr, ra);
160 void helper_bnd_jmp(CPUX86State *env)
162 if (!(env->hflags2 & HF2_MPX_PR_MASK)) {
163 memset(env->bnd_regs, 0, sizeof(env->bnd_regs));
164 env->hflags &= ~HF_MPX_IU_MASK;